{"id":34211,"date":"2025-11-13T01:31:12","date_gmt":"2025-11-12T22:31:12","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/webforms-core-2-ve-durum-yonetimi-neden-bu-kadar-onemli\/"},"modified":"2025-11-13T01:31:12","modified_gmt":"2025-11-12T22:31:12","slug":"webforms-core-2-ve-durum-yonetimi-neden-bu-kadar-onemli","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/webforms-core-2-ve-durum-yonetimi-neden-bu-kadar-onemli\/","title":{"rendered":"WebForms Core 2 ve Durum Y\u00f6netimi Neden Bu Kadar \u00d6nemli?"},"content":{"rendered":"<p><body><\/p>\n<h1>WebForms Core 2&#8217;de Durum Y\u00f6netimi: Yeni \u00d6zelliklerle Kontrol\u00fc Art\u0131rma<\/h1>\n<p>WebForms Core 2 ortam\u0131nda durum y\u00f6netimi, geli\u015ftiricilerin s\u0131k\u00e7a kar\u015f\u0131la\u015ft\u0131\u011f\u0131 karma\u015f\u0131k ancak kritik bir konudur. Bu makalede, uygulamalar\u0131n\u0131z\u0131n performans\u0131n\u0131 ve kullan\u0131c\u0131 deneyimini iyile\u015ftirmek i\u00e7in modern ASP.NET Core yakla\u015f\u0131mlar\u0131n\u0131 kullanarak sayfalar aras\u0131 veri ak\u0131\u015f\u0131n\u0131 nas\u0131l daha etkin hale getirebilece\u011finizi ad\u0131m ad\u0131m ke\u015ffedeceksiniz. G\u00fcvenli ve \u00f6l\u00e7eklenebilir bir durum y\u00f6netimi stratejisi olu\u015fturman\u0131n inceliklerini bu rehberle \u00f6\u011frenin.<\/p>\n<style>\n        body {\n            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;\n            line-height: 1.6;\n            color: #333;\n            max-width: 900px;\n            margin: 0 auto;\n            padding: 20px;\n            background-color: #f9f9f9;\n        }<\/p>\n<p>        h2, h3 {\n            color: #0056b3;\n            margin-top: 30px;\n            margin-bottom: 15px;\n        }<\/p>\n<p>        h2 {\n            border-bottom: 2px solid #0056b3;\n            padding-bottom: 10px;\n        }<\/p>\n<p>        h3 {\n            border-bottom: 1px dashed #a0c3e1;\n            padding-bottom: 5px;\n        }<\/p>\n<p>        p {\n            margin-bottom: 1em;\n        }<\/p>\n<p>        ul, ol {\n            margin-bottom: 1em;\n            padding-left: 25px;\n        }<\/p>\n<p>        li {\n            margin-bottom: 0.5em;\n        }<\/p>\n<p>        pre {\n            background-color: #e8f0f8;\n            border: 1px solid #cce0f0;\n            padding: 15px;\n            border-radius: 5px;\n            overflow-x: auto;\n            margin-bottom: 1.5em;\n            font-size: 0.9em;\n        }<\/p>\n<p>        code {\n            font-family: 'Consolas', 'Monaco', monospace;\n            color: #d14;\n            background-color: #f8f8f8;\n            padding: 2px 4px;\n            border-radius: 3px;\n        }<\/p>\n<p>        pre code {\n            color: #333;\n            background-color: transparent;\n            padding: 0;\n        }<\/p>\n<p>        .expert-tip {\n            background-color: #fff3cd;\n            border-left: 5px solid #ffc107;\n            padding: 15px;\n            margin: 20px 0;\n            border-radius: 5px;\n            color: #664d03;\n        }<\/p>\n<p>        table {\n            width: 100%;\n            border-collapse: collapse;\n            margin-bottom: 1.5em;\n        }<\/p>\n<p>        th, td {\n            border: 1px solid #ddd;\n            padding: 8px;\n            text-align: left;\n        }<\/p>\n<p>        th {\n            background-color: #f2f2f2;\n            color: #555;\n        }<\/p>\n<p>        @media screen and (max-width: 768px) {\n            body {\n                padding: 15px;\n            }<\/p>\n<p>            h2 {\n                font-size: 1.5em;\n            }<\/p>\n<p>            h3 {\n                font-size: 1.2em;\n            }<\/p>\n<p>            table, thead, tbody, th, td, tr {\n                display: block;\n            }<\/p>\n<p>            thead tr {\n                position: absolute;\n                top: -9999px;\n                left: -9999px;\n            }<\/p>\n<p>            tr {\n                border: 1px solid #ccc;\n                margin-bottom: 10px;\n            }<\/p>\n<p>            td {\n                border: none;\n                border-bottom: 1px solid #eee;\n                position: relative;\n                padding-left: 50%;\n                text-align: right;\n            }<\/p>\n<p>            td:before {\n                position: absolute;\n                top: 6px;\n                left: 6px;\n                width: 45%;\n                padding-right: 10px;\n                white-space: nowrap;\n                text-align: left;\n                font-weight: bold;\n            }<\/p>\n<p>            td:nth-of-type(1):before { content: \"Y\u00f6ntem\"; }\n            td:nth-of-type(2):before { content: \"Kapsam\"; }\n            td:nth-of-type(3):before { content: \"G\u00fcvenlik\"; }\n            td:nth-of-type(4):before { content: \"Performans\"; }\n        }\n    <\/style>\n<p>ASP.NET WebForms, y\u0131llarca s\u00fcren bir geli\u015ftirme miras\u0131na sahip k\u00f6kl\u00fc bir framework&#8217;t\u00fcr. Geleneksel WebForms uygulamalar\u0131, geli\u015ftiricilere kolayl\u0131k sa\u011flamak amac\u0131yla <code>ViewState<\/code>, <code>Session<\/code> ve <code>IsPostBack<\/code> gibi mekanizmalarla sunucu taraf\u0131nda durumu y\u00f6netme olana\u011f\u0131 sunmu\u015ftur. Ancak, bu kolayl\u0131k beraberinde performans sorunlar\u0131, sayfa b\u00fcy\u00fckl\u00fc\u011f\u00fc art\u0131\u015f\u0131 ve \u00f6l\u00e7eklenebilirlik k\u0131s\u0131tlamalar\u0131 gibi zorluklar\u0131 da getirmi\u015ftir. G\u00fcn\u00fcm\u00fczde ASP.NET Core ekosistemiyle birlikte gelen WebForms Core 2, bu paradigma \u00fczerinde \u00f6nemli yenilikler ve yakla\u015f\u0131mlar sunmaktad\u0131r. Peki, bu ge\u00e7i\u015f s\u00fcrecinde durum y\u00f6netimini neden bu kadar ciddiye almal\u0131y\u0131z?<\/p>\n<p>Durum y\u00f6netimi (State Management), web uygulamalar\u0131n\u0131n temel bir bile\u015fenidir; zira HTTP protokol\u00fc do\u011fas\u0131 gere\u011fi &#8220;stateless&#8221; yani durumsuz bir yap\u0131d\u0131r. Her istek, bir \u00f6nceki istekten ba\u011f\u0131ms\u0131zd\u0131r. Kullan\u0131c\u0131lar\u0131n bir e-ticaret sitesinde sepete \u00fcr\u00fcn eklemesi, \u00e7ok ad\u0131ml\u0131 bir formu doldurmas\u0131 veya ki\u015fiselle\u015ftirilmi\u015f bir deneyim ya\u015famas\u0131, arka planda bir durumun tutulmas\u0131n\u0131 gerektirir. WebForms Core 2, bu geleneksel yakla\u015f\u0131m\u0131n getirdi\u011fi sorunlar\u0131 ele al\u0131rken, ayn\u0131 zamanda modern ASP.NET Core prensipleriyle uyumlu, daha esnek ve \u00f6l\u00e7eklenebilir \u00e7\u00f6z\u00fcmler sunmay\u0131 hedefler. Bu sayede, geli\u015ftiriciler hem WebForms&#8217;un sundu\u011fu komponent tabanl\u0131 geli\u015ftirme kolayl\u0131\u011f\u0131n\u0131 koruyabilir hem de ASP.NET Core&#8217;un getirdi\u011fi performans, g\u00fcvenlik ve da\u011f\u0131t\u0131lm\u0131\u015f mimari avantajlar\u0131ndan faydalanabilirler. Dolay\u0131s\u0131yla, do\u011fru durum y\u00f6netimi stratejisini belirlemek, uygulaman\u0131z\u0131n gelecekteki ba\u015far\u0131s\u0131 i\u00e7in kilit rol oynamaktad\u0131r. \u0130\u015fte bu noktada, geli\u015ftiricilerin bilin\u00e7li tercihler yapmas\u0131, hem kod kalitesini art\u0131r\u0131r hem de kullan\u0131c\u0131 deneyimini \u00f6nemli \u00f6l\u00e7\u00fcde iyile\u015ftirir.<\/p>\n<p>Bir e-ticaret sitesi d\u00fc\u015f\u00fcnelim. Kullan\u0131c\u0131, \u00fcr\u00fcnleri sepete ekler, farkl\u0131 sayfalara g\u00f6z atar ve ard\u0131ndan \u00f6deme ekran\u0131na ilerler. Bu s\u00fcre\u00e7te kullan\u0131c\u0131n\u0131n sepetindeki \u00fcr\u00fcnler, adresi, \u00f6deme tercihleri gibi bilgiler sayfalar aras\u0131nda aktar\u0131lmak zorundad\u0131r. Geleneksel WebForms&#8217;ta bu veriler genellikle <code>Session<\/code> nesnesinde tutulurdu. Ancak, <code>Session<\/code>&#8216;\u0131n sunucu belle\u011fini t\u00fcketmesi ve da\u011f\u0131t\u0131k ortamlarda y\u00f6netilmesinin zorlu\u011fu, \u00f6l\u00e7eklenebilirlik a\u00e7\u0131s\u0131ndan ciddi bir engel te\u015fkil edebilir. WebForms Core 2, bu t\u00fcr senaryolar i\u00e7in <code>IDistributedCache<\/code> gibi aray\u00fczler ve client-side depolama se\u00e7enekleri sunarak daha robust \u00e7\u00f6z\u00fcmler geli\u015ftirmemize olanak tan\u0131r. B\u00f6ylece, hem performanstan \u00f6d\u00fcn vermeden hem de uygulaman\u0131n mimarisini daha esnek hale getirerek, kullan\u0131c\u0131ya kesintisiz bir deneyim sunulabilir. Bu durum, \u00f6zellikle y\u00fcksek trafikli uygulamalar i\u00e7in hayati \u00f6neme sahiptir. Durum y\u00f6netiminin do\u011fru kurgulanmas\u0131, uygulaman\u0131n bak\u0131m\u0131 ve geli\u015ftirme s\u00fcre\u00e7lerinde de ciddi zaman kazanc\u0131 sa\u011flar.<\/p>\n<h2>ViewState&#8217;e Modern Bir Bak\u0131\u015f: WebForms Core 2&#8217;de Durum Tutman\u0131n Yeni Yollar\u0131 Nelerdir?<\/h2>\n<p>Geleneksel ASP.NET WebForms&#8217;un en karakteristik \u00f6zelliklerinden biri olan <code>ViewState<\/code>, sayfa postback&#8217;lerinde kontrollerin durumunu korumak i\u00e7in tasarlanm\u0131\u015f bir mekanizmad\u0131r. Sayfan\u0131n HTML \u00e7\u0131kt\u0131s\u0131na gizli bir alan olarak eklenen bu b\u00fcy\u00fck metin blo\u011fu, her postback&#8217;te sunucuya geri g\u00f6nderilir ve sayfa y\u00fcklendikten sonra ayr\u0131\u015ft\u0131r\u0131larak kontrollerin eski durumlar\u0131na getirilmesini sa\u011flar. Bu yap\u0131, geli\u015ftiriciler i\u00e7in b\u00fcy\u00fck bir kolayl\u0131k sunsa da, beraberinde \u00f6nemli performans ve g\u00fcvenlik sorunlar\u0131 getirmi\u015ftir. B\u00fcy\u00fck <code>ViewState<\/code> boyutlar\u0131, \u00f6zellikle mobil cihazlarda veya yava\u015f internet ba\u011flant\u0131lar\u0131nda sayfa y\u00fckleme s\u00fcrelerini uzatabilir, bant geni\u015fli\u011fi kullan\u0131m\u0131n\u0131 art\u0131rabilir. Dahas\u0131, <code>ViewState<\/code> varsay\u0131lan olarak \u015fifrelenmedi\u011fi i\u00e7in hassas verilerin saklanmas\u0131 g\u00fcvenlik a\u00e7\u0131klar\u0131 olu\u015fturabilir.<\/p>\n<p>WebForms Core 2 ortam\u0131nda, <code>ViewState<\/code>&#8216;in geleneksel anlamda bir kar\u015f\u0131l\u0131\u011f\u0131 bulunmamaktad\u0131r. Ancak, ayn\u0131 amaca hizmet eden veya benzer i\u015flevsellik sa\u011flayan modern ASP.NET Core yakla\u015f\u0131mlar\u0131 mevcuttur. Bu yakla\u015f\u0131mlar, genellikle daha granular kontrol, daha iyi performans ve daha g\u00fcvenli veri depolama se\u00e7enekleri sunar. \u0130\u015fte bu yeni yakla\u015f\u0131mlardan baz\u0131lar\u0131:<\/p>\n<ul>\n<li><strong>Gizli Alanlar (Hidden Fields):<\/strong> ViewState&#8217;in yapt\u0131\u011f\u0131 gibi, verileri HTML&#8217;e gizli input alanlar\u0131 olarak g\u00f6mmek basit durumlar i\u00e7in hala ge\u00e7erli bir y\u00f6ntemdir. \u00d6zellikle k\u00fc\u00e7\u00fck miktardaki ve hassas olmayan veriler i\u00e7in idealdir. Ancak, ViewState&#8217;e benzer \u015fekilde sayfa boyutunu art\u0131rabilir.<\/li>\n<li><strong>TempData:<\/strong> Genellikle bir redirection (y\u00f6nlendirme) s\u0131ras\u0131nda veriyi bir istekten di\u011ferine ta\u015f\u0131mak i\u00e7in kullan\u0131l\u0131r. Veri okunduktan sonra otomatik olarak silinir, bu da onu tek seferlik mesajlar veya k\u0131sa \u00f6m\u00fcrl\u00fc durumlar i\u00e7in m\u00fckemmel k\u0131lar. ASP.NET Core&#8217;da <code>ITempDataProvider<\/code> ile yap\u0131land\u0131r\u0131labilir ve genellikle session veya cookie tabanl\u0131d\u0131r.<\/li>\n<li><strong>Client-Side Depolama (Taray\u0131c\u0131 Depolama):<\/strong> Modern web uygulamalar\u0131nda s\u0131k\u00e7a kullan\u0131lan <code>LocalStorage<\/code> ve <code>SessionStorage<\/code> gibi taray\u0131c\u0131 tabanl\u0131 depolama mekanizmalar\u0131, b\u00fcy\u00fck miktarda veriyi istemci taraf\u0131nda tutmak i\u00e7in idealdir. <code>LocalStorage<\/code>, taray\u0131c\u0131 kapat\u0131lsa bile veriyi saklarken, <code>SessionStorage<\/code> sadece sekme a\u00e7\u0131k kald\u0131\u011f\u0131 s\u00fcrece veriyi korur. Bu y\u00f6ntemler, sunucu y\u00fck\u00fcn\u00fc azalt\u0131r ancak hassas veriler i\u00e7in dikkatli kullan\u0131lmal\u0131, gerekirse \u015fifrelenmelidir.<\/li>\n<li><strong>Cookieler:<\/strong> K\u00fc\u00e7\u00fck miktarda veriyi istemci taraf\u0131nda depolaman\u0131n geleneksel yollar\u0131ndan biridir. Genellikle kimlik do\u011frulama tokenlar\u0131 veya kullan\u0131c\u0131 tercihleri gibi veriler i\u00e7in kullan\u0131l\u0131r. G\u00fcvenlik \u00f6zellikleri (<code>HttpOnly<\/code>, <code>Secure<\/code>, <code>SameSite<\/code>) ile yap\u0131land\u0131r\u0131labilirler.<\/li>\n<\/ul>\n<p>\u00d6rne\u011fin, bir kullan\u0131c\u0131n\u0131n sepetindeki \u00fcr\u00fcn ID&#8217;lerini veya bir anketin o anki ad\u0131m\u0131n\u0131 <code>LocalStorage<\/code>&#8216;da tutabiliriz. Bu, her sayfa yenilemesinde veya postback&#8217;te sunucuya gitmeden verinin korunmas\u0131n\u0131 sa\u011flar. Ancak, bu verilerin sunucuya g\u00f6nderilmesi gerekti\u011finde, JavaScript \u00fczerinden al\u0131narak bir gizli alana yerle\u015ftirilmesi veya AJAX \u00e7a\u011fr\u0131s\u0131 ile g\u00f6nderilmesi gerekebilir. Hassas veriler i\u00e7in <code>LocalStorage<\/code> kullan\u0131rken, veriyi JavaScript taraf\u0131nda \u015fifrelemek ve sunucu taraf\u0131nda do\u011frulamak hayati \u00f6neme sahiptir. Aksi takdirde, potansiyel g\u00fcvenlik a\u00e7\u0131klar\u0131 olu\u015fabilir.<\/p>\n<pre><code>\n    \/\/ JavaScript ile LocalStorage'a veri kaydetme\n    function saveToLocalStorage(key, value) {\n        localStorage.setItem(key, value);\n    }\n\n    \/\/ JavaScript ile LocalStorage'dan veri okuma\n    function readFromLocalStorage(key) {\n        return localStorage.getItem(key);\n    }\n\n    \/\/ Kullan\u0131c\u0131 sepetindeki \u00fcr\u00fcnleri kaydetme (\u00f6rnek)\n    const cartItems = JSON.stringify([{ id: 1, name: '\u00dcr\u00fcn A' }, { id: 2, name: '\u00dcr\u00fcn B' }]);\n    saveToLocalStorage('userCart', cartItems);\n\n    \/\/ Sepeti okuma\n    const storedCart = JSON.parse(readFromLocalStorage('userCart'));\n    console.log('Sepet:', storedCart);\n\n    \/\/ Hassas veri \u00f6rne\u011fi: \u015eifreleme (basit bir \u00f6rnek, ger\u00e7ek uygulamada daha g\u00fc\u00e7l\u00fc algoritmalar kullan\u0131lmal\u0131)\n    function encryptData(data) {\n        \/\/ Burada ger\u00e7ek bir \u015fifreleme k\u00fct\u00fcphanesi kullan\u0131lmal\u0131 (\u00f6rn: CryptoJS)\n        return btoa(data); \/\/ Basit Base64 kodlama\n    }\n\n    function decryptData(encryptedData) {\n        \/\/ Burada ger\u00e7ek bir \u015fifreleme k\u00fct\u00fcphanesi kullan\u0131lmal\u0131\n        return atob(encryptedData); \/\/ Basit Base64 kod \u00e7\u00f6zme\n    }\n\n    const sensitiveData = \"Gizli Kullan\u0131c\u0131 Ayar\u0131\";\n    const encryptedSensitiveData = encryptData(sensitiveData);\n    saveToLocalStorage('userSettings', encryptedSensitiveData);\n    console.log('\u015eifrelenmi\u015f Ayar:', encryptedSensitiveData);\n\n    const decryptedSensitiveData = decryptData(readFromLocalStorage('userSettings'));\n    console.log('\u015eifresi \u00c7\u00f6z\u00fclm\u00fc\u015f Ayar:', decryptedSensitiveData);\n    <\/pre>\n<p><\/code><\/p>\n<div class=\"expert-tip\">\n      Uzman \u0130pucu: Client-side depolama kullan\u0131rken, performans kazanc\u0131n\u0131n yan\u0131 s\u0131ra g\u00fcvenlik risklerini de g\u00f6z \u00f6n\u00fcnde bulundurun. Hassas verileri asla do\u011frudan ve \u015fifrelemeden saklamay\u0131n. JavaScript tabanl\u0131 \u015fifreleme y\u00f6ntemleri bile sunucu taraf\u0131nda do\u011frulama ve tekrar \u015fifreleme ile desteklenmelidir.\n    <\/div>\n<p>Sonu\u00e7 olarak, WebForms Core 2'de geleneksel <code>ViewState<\/code> yerine, uygulama ihtiya\u00e7lar\u0131n\u0131za ve veri hassasiyetine g\u00f6re yukar\u0131da belirtilen modern client-side veya server-side yakla\u015f\u0131mlar\u0131n\u0131 bir arada kullanarak daha optimize ve g\u00fcvenli bir durum y\u00f6netimi stratejisi olu\u015fturabilirsiniz. Bu, uygulaman\u0131z\u0131n daha h\u0131zl\u0131, daha \u00f6l\u00e7eklenebilir ve daha g\u00fcvenli olmas\u0131n\u0131 sa\u011flayacakt\u0131r.<\/p>\n<h2>Sunucu Taraf\u0131 Durum Y\u00f6netiminde Geli\u015fmeler: Session, Cache ve TempData Nas\u0131l Daha Etkin Kullan\u0131l\u0131r?<\/h2>\n<p>ASP.NET Core ve dolay\u0131s\u0131yla WebForms Core 2'de sunucu taraf\u0131 durum y\u00f6netimi, geleneksel WebForms'a k\u0131yasla daha esnek ve mod\u00fcler bir yap\u0131ya sahiptir. Geli\u015ftiricilere, uygulaman\u0131n \u00f6l\u00e7eklenebilirlik ve performans hedeflerine uygun farkl\u0131 se\u00e7enekler sunulmaktad\u0131r. Geleneksel <code>Session<\/code> nesnesinin s\u0131n\u0131rlamalar\u0131 ve sunucu belle\u011fi \u00fczerindeki y\u00fck\u00fc, \u00f6zellikle bulut tabanl\u0131 veya y\u00fcksek trafikli uygulamalarda ciddi sorunlara yol a\u00e7abilir. Bu nedenle, ASP.NET Core, <code>IDistributedCache<\/code> aray\u00fcz\u00fc ve <code>TempData<\/code> gibi daha modern ve esnek yakla\u015f\u0131mlar\u0131 te\u015fvik etmektedir.<\/p>\n<h3>Session Kullan\u0131m\u0131nda Yenilikler ve Da\u011f\u0131t\u0131k \u00d6nbellekleme<\/h3>\n<p>ASP.NET Core'daki <code>Session<\/code>, varsay\u0131lan olarak bellek i\u00e7i (in-memory) bir \u00e7\u00f6z\u00fcm sunar. Ancak, uygulaman\u0131z\u0131 birden fazla sunucuya \u00f6l\u00e7eklendirdi\u011finizde (load balancing), kullan\u0131c\u0131 isteklerinin her zaman ayn\u0131 sunucuya gitmesini garanti etmek zorla\u015f\u0131r. Bu duruma \"yap\u0131\u015fkan oturumlar\" (sticky sessions) denir ve genellikle \u00f6nerilmez. Bu sorunu a\u015fmak i\u00e7in <code>IDistributedCache<\/code> aray\u00fcz\u00fc devreye girer. Bu aray\u00fcz sayesinde, <code>Session<\/code> verilerini Redis, SQL Server veya NCache gibi da\u011f\u0131t\u0131k bir depolama biriminde tutabilirsiniz. Bu yakla\u015f\u0131m, oturum verilerinin herhangi bir sunucudan eri\u015filebilir olmas\u0131n\u0131 sa\u011flar, b\u00f6ylece uygulaman\u0131z yatay olarak kolayca \u00f6l\u00e7eklenebilir.<\/p>\n<pre><code>\n    \/\/ Startup.cs dosyas\u0131nda ConfigureServices metodu i\u00e7inde\n    public void ConfigureServices(IServiceCollection services)\n    {\n        services.AddDistributedMemoryCache(); \/\/ Geli\u015ftirme ortam\u0131 i\u00e7in InMemory\n        \/\/ Veya Redis i\u00e7in:\n        \/\/ services.AddStackExchangeRedisCache(options =>\n        \/\/ {\n        \/\/     options.Configuration = \"localhost\";\n        \/\/     options.InstanceName = \"SampleInstance\";\n        \/\/ });\n\n        services.AddSession(options =>\n        {\n            options.IdleTimeout = TimeSpan.FromMinutes(30); \/\/ Oturumun aktif kalma s\u00fcresi\n            options.Cookie.HttpOnly = true; \/\/ Sadece HTTP \u00fczerinden eri\u015filebilir\n            options.Cookie.IsEssential = true; \/\/ GDPR uyumlulu\u011fu i\u00e7in\n        });\n\n        \/\/ Di\u011fer servisler...\n    }\n\n    \/\/ Configure metodu i\u00e7inde\n    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)\n    {\n        \/\/ ...\n        app.UseSession(); \/\/ Session middleware'ini ekleyin\n        \/\/ ...\n    }\n\n    \/\/ Bir .aspx.cs sayfas\u0131nda Session kullanma\n    public partial class Default : System.Web.UI.Page\n    {\n        protected void Page_Load(object sender, EventArgs e)\n        {\n            if (Session[\"UserName\"] == null)\n            {\n                Session[\"UserName\"] = \"Ziyaret\u00e7i\";\n            }\n            Response.Write($\"Merhaba, {Session[\"UserName\"]}\");\n        }\n\n        protected void BtnLogin_Click(object sender, EventArgs e)\n        {\n            Session[\"UserName\"] = \"Ay\u015fe Y\u0131lmaz\";\n            Response.Redirect(\"HomePage.aspx\");\n        }\n    }\n    <\/pre>\n<p><\/code><\/p>\n<h3>TempData: K\u0131sa \u00d6m\u00fcrl\u00fc Veri Ta\u015f\u0131ma<\/h3>\n<p><code>TempData<\/code>, genellikle bir HTTP iste\u011fi ile di\u011fer HTTP iste\u011fi aras\u0131nda veri ta\u015f\u0131mak i\u00e7in kullan\u0131l\u0131r. En belirgin \u00f6zelli\u011fi, verinin okunduktan sonra otomatik olarak silinmesidir. Bu \u00f6zellik, kullan\u0131c\u0131ya bir i\u015flem sonras\u0131 bilgi mesaj\u0131 g\u00f6stermek (\u00f6rne\u011fin, \"\u00dcr\u00fcn ba\u015far\u0131yla sepete eklendi!\") veya bir formu POST ettikten sonra ba\u015fka bir sayfaya y\u00f6nlendirirken veri aktarmak i\u00e7in idealdir. <code>TempData<\/code>, varsay\u0131lan olarak oturum sa\u011flay\u0131c\u0131s\u0131n\u0131 veya \u00e7erezleri kullanarak \u00e7al\u0131\u015fabilir. Cookie tabanl\u0131 <code>TempData<\/code>, sunucu y\u00fck\u00fcn\u00fc azalt\u0131rken, k\u00fc\u00e7\u00fck boyutlu ve hassas olmayan veriler i\u00e7in daha uygundur.<\/p>\n<pre><code>\n    \/\/ Bir .aspx.cs sayfas\u0131nda TempData kullan\u0131m\u0131\n    public partial class Register : System.Web.UI.Page\n    {\n        protected void BtnRegister_Click(object sender, EventArgs e)\n        {\n            \/\/ Kullan\u0131c\u0131 kayd\u0131 yap\u0131ld\u0131 varsayal\u0131m\n            \/\/ TempData'ya mesaj ekleme (WebForms Core 2'de TempData'y\u0131 do\u011frudan kullanmak i\u00e7in\n            \/\/ baz\u0131 ek yap\u0131land\u0131rmalar veya custom provider gerekebilir, ancak Razor Pages\/MVC ile kullan\u0131m\u0131 daha yayg\u0131nd\u0131r.)\n            \/\/ Basit bir sim\u00fclasyon olarak burada TempData'ya benzer bir yap\u0131 kullan\u0131labilir.\n            \/\/ \u00d6rne\u011fin: Response.Redirect'le querystring veya Session \u00fczerinden ge\u00e7i\u015f.\n            \/\/ Ancak, ASP.NET Core WebForms'da TempData'y\u0131 kullanmak i\u00e7in bir ara katman veya\n            \/\/ benzeri bir mekanizma tasarlaman\u0131z gerekebilir.\n            \/\/ Ger\u00e7ek ASP.NET Core uygulamalar\u0131nda TempData, ControllerBase veya PageModel'den eri\u015filebilir.\n            \/\/ WebForms Core 2'nin mevcut haliyle direkt TempData deste\u011fi hen\u00fcz olgunla\u015fmam\u0131\u015f olabilir.\n            \/\/ Bunun yerine, Session veya query string kullan\u0131m\u0131 daha pratik olabilir.\n            Session[\"SuccessMessage\"] = \"Kayd\u0131n\u0131z ba\u015far\u0131yla tamamland\u0131!\";\n            Response.Redirect(\"RegisterSuccess.aspx\");\n        }\n    }\n\n    public partial class RegisterSuccess : System.Web.UI.Page\n    {\n        protected void Page_Load(object sender, EventArgs e)\n        {\n            if (Session[\"SuccessMessage\"] != null)\n            {\n                Response.Write(Session[\"SuccessMessage\"].ToString());\n                Session.Remove(\"SuccessMessage\"); \/\/ Mesaj\u0131 okunduktan sonra kald\u0131r\u0131n\n            }\n        }\n    }\n    <\/pre>\n<p><\/code><\/p>\n<div class=\"expert-tip\">\n        Uzman \u0130pucu: TempData'n\u0131n otomatik silinme \u00f6zelli\u011fi, veri tutars\u0131zl\u0131\u011f\u0131n\u0131 \u00f6nlemek i\u00e7in harikad\u0131r. Ancak, veriye tekrar eri\u015fmeniz gerekirse <code>TempData.Peek()<\/code> y\u00f6ntemini kullanabilirsiniz. Bu, veriyi silmeden okuman\u0131z\u0131 sa\u011flar.\n    <\/div>\n<h3>IDistributedCache Aray\u00fcz\u00fc ile Genel \u00d6nbellekleme<\/h3>\n<p><code>IDistributedCache<\/code>, sadece oturum y\u00f6netimi i\u00e7in de\u011fil, ayn\u0131 zamanda s\u0131k eri\u015filen ancak nadiren de\u011fi\u015fen verileri \u00f6nbelle\u011fe almak i\u00e7in de kullan\u0131lan g\u00fc\u00e7l\u00fc bir ara\u00e7t\u0131r. \u00d6rne\u011fin, veritaban\u0131ndan \u00e7ekilen \u00fcr\u00fcn kategorileri, ayarlar veya dinamik men\u00fc \u00f6\u011feleri gibi verileri \u00f6nbellekte tutmak, veritaban\u0131 y\u00fck\u00fcn\u00fc azalt\u0131r ve uygulaman\u0131n yan\u0131t s\u00fcrelerini iyile\u015ftirir. Redis veya SQL Server tabanl\u0131 \u00f6nbellekleme, birden fazla sunucuya yay\u0131lan uygulamalar i\u00e7in idealdir.<\/p>\n<pre><code>\n    \/\/ Startup.cs dosyas\u0131nda ConfigureServices metodu i\u00e7inde\n    \/\/ services.AddStackExchangeRedisCache(...) veya services.AddDistributedSqlServerCache(...) eklenmeli.\n\n    \/\/ Bir .aspx.cs sayfas\u0131nda IDistributedCache kullan\u0131m\u0131\n    using Microsoft.Extensions.Caching.Distributed;\n    using System.Text;\n    using System.Threading.Tasks;\n\n    public partial class ProductCategories : System.Web.UI.Page\n    {\n        private readonly IDistributedCache _cache;\n\n        \/\/ Constructor Injection ile IDistributedCache al\u0131n\u0131r\n        public ProductCategories(IDistributedCache cache)\n        {\n            _cache = cache;\n        }\n\n        protected async void Page_Load(object sender, EventArgs e)\n        {\n            string cacheKey = \"ProductCategoriesList\";\n            string categoriesJson;\n\n            \/\/ \u00d6nbellekten veriyi okumaya \u00e7al\u0131\u015f\n            var encodedCategories = await _cache.GetAsync(cacheKey);\n\n            if (encodedCategories != null)\n            {\n                categoriesJson = Encoding.UTF8.GetString(encodedCategories);\n                Response.Write(\"Kategoriler \u00f6nbellekten al\u0131nd\u0131:<br>\" + categoriesJson);\n            }\n            else\n            {\n                \/\/ Veri \u00f6nbellekte yoksa veritaban\u0131ndan \u00e7ek (sim\u00fclasyon)\n                categoriesJson = \"[{\\\"Id\\\":1,\\\"Name\\\":\\\"Elektronik\\\"},{\\\"Id\\\":2,\\\"Name\\\":\\\"Giyim\\\"}]\";\n                var encodedData = Encoding.UTF8.GetBytes(categoriesJson);\n\n                var options = new DistributedCacheEntryOptions()\n                                .SetSlidingExpiration(TimeSpan.FromMinutes(5)); \/\/ 5 dakika i\u00e7inde eri\u015filmezse sil\n\n                \/\/ Veriyi \u00f6nbelle\u011fe yaz\n                await _cache.SetAsync(cacheKey, encodedData, options);\n                Response.Write(\"Kategoriler veritaban\u0131ndan \u00e7ekildi ve \u00f6nbelle\u011fe yaz\u0131ld\u0131:<br>\" + categoriesJson);\n            }\n        }\n    }\n    <\/pre>\n<p><\/code><\/p>\n<p>Sonu\u00e7 olarak, WebForms Core 2'deki sunucu taraf\u0131 durum y\u00f6netimi, geleneksel y\u00f6ntemlere g\u00f6re \u00e7ok daha mod\u00fcler ve performans odakl\u0131d\u0131r. <code>IDistributedCache<\/code> kullanarak <code>Session<\/code> verilerini da\u011f\u0131t\u0131k bir yap\u0131ya ta\u015f\u0131mak veya genel verileri \u00f6nbelle\u011fe almak, uygulaman\u0131z\u0131n \u00f6l\u00e7eklenebilirli\u011fini art\u0131r\u0131r. <code>TempData<\/code> ise, tek kullan\u0131ml\u0131k veri aktar\u0131m\u0131 i\u00e7in sade ve etkili bir \u00e7\u00f6z\u00fcm sunar. Bu ara\u00e7lar\u0131 do\u011fru bir \u015fekilde kullanarak uygulaman\u0131z\u0131n performans\u0131n\u0131 ve kararl\u0131l\u0131\u011f\u0131n\u0131 \u00f6nemli \u00f6l\u00e7\u00fcde iyile\u015ftirebilirsiniz.<\/p>\n<h2>Client-Side Durum Kontrol\u00fc \u0130\u00e7in En \u0130yi Pratikler ve G\u00fcvenlik \u0130pu\u00e7lar\u0131 Nelerdir?<\/h2>\n<p>Modern web geli\u015ftirme s\u00fcre\u00e7lerinde, client-side durum kontrol\u00fc giderek daha fazla \u00f6nem kazanmaktad\u0131r. Sunucu y\u00fck\u00fcn\u00fc azaltmak, kullan\u0131c\u0131 deneyimini iyile\u015ftirmek ve daha dinamik uygulamalar olu\u015fturmak amac\u0131yla bir\u00e7ok veri istemci taraf\u0131nda y\u00f6netilir. WebForms Core 2 uygulamalar\u0131nda da, JavaScript, Cookieler ve taray\u0131c\u0131 depolama API'leri (LocalStorage, SessionStorage) arac\u0131l\u0131\u011f\u0131yla zengin client-side durum y\u00f6netimi stratejileri uygulanabilir. Ancak, bu yakla\u015f\u0131mlar beraberinde baz\u0131 g\u00fcvenlik ve performans endi\u015felerini de getirir. Bu b\u00f6l\u00fcmde, client-side durum y\u00f6netimi i\u00e7in en iyi pratikleri ve g\u00fcvenlik ipu\u00e7lar\u0131n\u0131 detayland\u0131raca\u011f\u0131z.<\/p>\n<h3>Cookieler ve G\u00fcvenlik Odakl\u0131 Kullan\u0131m<\/h3>\n<p>Cookieler, web sitelerinin k\u00fc\u00e7\u00fck miktardaki veriyi kullan\u0131c\u0131n\u0131n taray\u0131c\u0131s\u0131nda saklamas\u0131na olanak tan\u0131yan geleneksel bir client-side depolama y\u00f6ntemidir. Genellikle oturum ID'leri, kimlik do\u011frulama tokenlar\u0131 veya kullan\u0131c\u0131 tercihleri gibi verileri tutmak i\u00e7in kullan\u0131l\u0131rlar. Cookieler ile \u00e7al\u0131\u015f\u0131rken g\u00fcvenlik, en \u00f6nemli \u00f6ncelik olmal\u0131d\u0131r:<\/p>\n<ul>\n<li><strong><code>HttpOnly<\/code> Bayra\u011f\u0131:<\/strong> Bu bayrak, cookie'nin sadece HTTP istekleri arac\u0131l\u0131\u011f\u0131yla sunucuya g\u00f6nderilmesini sa\u011flar ve JavaScript'in cookie'ye eri\u015fmesini engeller. Bu, XSS (Cross-Site Scripting) sald\u0131r\u0131lar\u0131nda cookie'lerin \u00e7al\u0131nma riskini b\u00fcy\u00fck \u00f6l\u00e7\u00fcde azalt\u0131r.<\/li>\n<li><strong><code>Secure<\/code> Bayra\u011f\u0131:<\/strong> Bu bayrak, cookie'nin sadece HTTPS ba\u011flant\u0131lar\u0131 \u00fczerinden g\u00f6nderilmesini zorunlu k\u0131lar. Bu sayede, a\u011f dinleme (eavesdropping) sald\u0131r\u0131lar\u0131na kar\u015f\u0131 koruma sa\u011flan\u0131r ve cookie verilerinin \u015fifrelenmemi\u015f bir \u015fekilde iletilmesi \u00f6nlenir.<\/li>\n<li><strong><code>SameSite<\/code> Politikas\u0131:<\/strong> Bu \u00f6zellik, siteler aras\u0131 isteklerde cookie'lerin nas\u0131l g\u00f6nderilece\u011fini kontrol eder ve CSRF (Cross-Site Request Forgery) sald\u0131r\u0131lar\u0131na kar\u015f\u0131 g\u00fc\u00e7l\u00fc bir koruma sa\u011flar. \u00dc\u00e7 farkl\u0131 de\u011feri vard\u0131r: <code>Strict<\/code>, <code>Lax<\/code> ve <code>None<\/code>. <code>Strict<\/code> en g\u00fcvenli olan\u0131d\u0131r ancak baz\u0131 kullan\u0131m senaryolar\u0131nda k\u0131s\u0131tlay\u0131c\u0131 olabilir. <code>Lax<\/code> ise \u00e7o\u011fu modern web uygulamas\u0131 i\u00e7in iyi bir denge sunar.<\/li>\n<li><strong>Expiry (Biti\u015f S\u00fcresi):<\/strong> Hassas veriler i\u00e7eren cookie'ler i\u00e7in m\u00fcmk\u00fcn oldu\u011funca k\u0131sa bir biti\u015f s\u00fcresi belirleyin. \u00d6zellikle kimlik do\u011frulama cookie'leri i\u00e7in uzun \u00f6m\u00fcrl\u00fc olmamalar\u0131 \u00f6nemlidir.<\/li>\n<\/ul>\n<h3>Taray\u0131c\u0131 Depolama (LocalStorage ve SessionStorage)<\/h3>\n<p><code>LocalStorage<\/code> ve <code>SessionStorage<\/code>, Cookielere g\u00f6re daha fazla veri depolama kapasitesi sunar (genellikle 5-10 MB) ve sadece JavaScript arac\u0131l\u0131\u011f\u0131yla eri\u015filebilirler. Bu \u00f6zellikleri onlar\u0131 daha dinamik uygulamalar i\u00e7in cazip k\u0131lar. Ancak, g\u00fcvenlik konusunda baz\u0131 \u00f6nemli farkl\u0131l\u0131klar ve dikkat edilmesi gereken noktalar vard\u0131r:<\/p>\n<ul>\n<li><strong>XSS Riskleri:<\/strong> <code>LocalStorage<\/code> ve <code>SessionStorage<\/code>, JavaScript ile kolayca eri\u015filebildi\u011fi i\u00e7in, bir XSS sald\u0131r\u0131s\u0131 durumunda sald\u0131rganlar buradaki verilere de ula\u015fabilir. Bu nedenle, hassas verileri (kredi kart\u0131 bilgileri, \u015fifreler, kullan\u0131c\u0131 tokenlar\u0131 vb.) do\u011frudan bu depolama alanlar\u0131nda tutmaktan ka\u00e7\u0131n\u0131lmal\u0131d\u0131r.<\/li>\n<li><strong>\u015eifreleme ve Veri B\u00fct\u00fcnl\u00fc\u011f\u00fc:<\/strong> E\u011fer mutlaka hassas bir veriyi <code>LocalStorage<\/code>'da saklamak gerekiyorsa, bu veri client-side'da \u015fifrelenmeli ve sunucu taraf\u0131nda do\u011frulanmal\u0131d\u0131r. Ancak, client-side \u015fifreleme tek ba\u015f\u0131na yeterli de\u011fildir; \u00e7\u00fcnk\u00fc \u015fifreleme anahtar\u0131 da client-side'da bulunur ve kolayca ele ge\u00e7irilebilir.<\/li>\n<li><strong>Veri Ge\u00e7erlili\u011fi ve Yetkilendirme:<\/strong> Taray\u0131c\u0131da saklanan verilerin her zaman g\u00fcncel veya do\u011fru oldu\u011fu varsay\u0131lmamal\u0131d\u0131r. Sunucu taraf\u0131nda her zaman yetkilendirme ve veri ge\u00e7erlili\u011fi kontrolleri yap\u0131lmal\u0131d\u0131r.<\/li>\n<\/ul>\n<pre><code>\n    \/\/ HTML'de gizli bir alan kullanarak sunucuya veri g\u00f6nderme\n    \/\/ \u00d6rne\u011fin, LocalStorage'daki bir de\u011feri sunucuya post etmek i\u00e7in\n    <input type=\"hidden\" id=\"hdnCartData\" name=\"hdnCartData\" \/>\n    <script>\n        document.addEventListener('DOMContentLoaded', function() {\n            const cartData = localStorage.getItem('userCart');\n            if (cartData) {\n                document.getElementById('hdnCartData').value = cartData;\n            }\n        });\n    <\/script>\n    <\/pre>\n<p><\/code><\/p>\n<div class=\"expert-tip\">\n        Uzman \u0130pucu: Client-side depolama \u00e7\u00f6z\u00fcmlerini kullan\u0131rken asla tek ba\u015f\u0131na g\u00fcvenli\u011fe bel ba\u011flamay\u0131n. Her zaman sunucu taraf\u0131nda ek g\u00fcvenlik ve do\u011frulama katmanlar\u0131 uygulay\u0131n. Kullan\u0131c\u0131 taraf\u0131ndan g\u00f6nderilen her verinin k\u00f6t\u00fc niyetli olabilece\u011fi varsay\u0131m\u0131yla hareket edin.\n    <\/div>\n<h3>AJAX ve Dinamik \u0130\u00e7erik Y\u00f6netimi<\/h3>\n<p>WebForms Core 2 uygulamalar\u0131nda, AJAX (Asynchronous JavaScript and XML) kullanarak sayfalar\u0131n tamam\u0131n\u0131 yeniden y\u00fcklemeden dinamik olarak i\u00e7erik g\u00fcncellemek ve durum y\u00f6netmek m\u00fcmk\u00fcnd\u00fcr. Bu, kullan\u0131c\u0131 deneyimini \u00f6nemli \u00f6l\u00e7\u00fcde art\u0131r\u0131r ve bant geni\u015fli\u011fi kullan\u0131m\u0131n\u0131 azalt\u0131r. \u00d6rne\u011fin, bir liste veya tablo verilerini AJAX ile \u00e7ekip DOM'u g\u00fcncellemek, <code>ViewState<\/code>'in getirdi\u011fi y\u00fck\u00fc ortadan kald\u0131r\u0131r. Ancak AJAX isteklerinde de g\u00fcvenlik \u00f6nlemleri elden b\u0131rak\u0131lmamal\u0131d\u0131r:<\/p>\n<ul>\n<li><strong>CSRF Tokenlar\u0131:<\/strong> POST istekleri i\u00e7in mutlaka anti-CSRF tokenlar\u0131 kullan\u0131lmal\u0131d\u0131r. ASP.NET Core, <code>Html.AntiForgeryToken()<\/code> gibi yard\u0131mc\u0131larla bu korumay\u0131 kolayca sa\u011flar.<\/li>\n<li><strong>Yetkilendirme ve Kimlik Do\u011frulama:<\/strong> AJAX endpoint'leri de sunucu taraf\u0131nda s\u0131k\u0131 bir \u015fekilde yetkilendirilmeli ve kimlik do\u011frulamas\u0131 yap\u0131lmal\u0131d\u0131r.<\/li>\n<li><strong>Veri Do\u011frulama:<\/strong> AJAX ile g\u00f6nderilen t\u00fcm veriler, sunucu taraf\u0131nda titizlikle do\u011frulanmal\u0131d\u0131r.<\/li>\n<\/ul>\n<p>\u00d6zetle, client-side durum kontrol\u00fc, modern WebForms Core 2 uygulamalar\u0131 i\u00e7in g\u00fc\u00e7l\u00fc bir potansiyel sunar. Ancak, bu potansiyeli kullan\u0131rken g\u00fcvenlik en \u00fcst d\u00fczeyde tutulmal\u0131d\u0131r. Cookieler i\u00e7in <code>HttpOnly<\/code>, <code>Secure<\/code> ve <code>SameSite<\/code> bayraklar\u0131, <code>LocalStorage<\/code> ve <code>SessionStorage<\/code> i\u00e7in hassas veri saklama k\u0131s\u0131tlamalar\u0131 ve t\u00fcm client-side etkile\u015fimler i\u00e7in sunucu taraf\u0131 do\u011frulama, uygulaman\u0131z\u0131n g\u00fcvenli\u011fini art\u0131racak temel pratiklerdir. Bu sayede, hem performansl\u0131 hem de g\u00fcvenli bir kullan\u0131c\u0131 deneyimi sunabilirsiniz.<\/p>\n<h2>WebForms Core 2 Uygulamalar\u0131nda Durum Y\u00f6netimi Mimarisi Nas\u0131l Tasarlan\u0131r?<\/h2>\n<p>Etkili bir durum y\u00f6netimi mimarisi tasarlamak, WebForms Core 2 uygulamalar\u0131n\u0131n ba\u015far\u0131s\u0131 i\u00e7in kritik \u00f6neme sahiptir. Karar a\u011fac\u0131 modellemesi, verinin \u00f6mr\u00fc, hassasiyeti, boyutu ve eri\u015fim gereksinimleri gibi fakt\u00f6rlere dayanarak do\u011fru depolama stratejisini se\u00e7menize yard\u0131mc\u0131 olabilir. Uygulaman\u0131n \u00f6l\u00e7eklenebilirli\u011fi ve bak\u0131m\u0131 da bu mimarinin birincil hedeflerinden olmal\u0131d\u0131r. \u0130\u015fte bir durum y\u00f6netimi mimarisi tasarlarken g\u00f6z \u00f6n\u00fcnde bulundurman\u0131z gereken temel ad\u0131mlar ve yakla\u015f\u0131mlar.<\/p>\n<h3>Karar A\u011fac\u0131: Hangi Durumu Nerede Tutmal\u0131?<\/h3>\n<p>Durum y\u00f6netiminde do\u011fru arac\u0131 se\u00e7mek, uygulaman\u0131z\u0131n performans\u0131, g\u00fcvenli\u011fi ve \u00f6l\u00e7eklenebilirli\u011fi \u00fczerinde do\u011frudan etkilidir. A\u015fa\u011f\u0131daki tablo, farkl\u0131 durum y\u00f6netimi se\u00e7eneklerini kar\u015f\u0131la\u015ft\u0131rmal\u0131 olarak sunmaktad\u0131r:<\/p>\n<table>\n<thead>\n<tr>\n<th>Y\u00f6ntem<\/th>\n<th>Kapsam<\/th>\n<th>G\u00fcvenlik<\/th>\n<th>Performans<\/th>\n<th>Kullan\u0131m Senaryosu<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Session (Da\u011f\u0131t\u0131k)<\/strong><\/td>\n<td>Kullan\u0131c\u0131 oturumu<\/td>\n<td>Orta (Sunucuda tutulur, ta\u015f\u0131mada \u015fifrelenmeli)<\/td>\n<td>\u0130yi (Veritaban\u0131\/Redis ile \u00f6l\u00e7eklenebilir)<\/td>\n<td>Kullan\u0131c\u0131ya \u00f6zel, uzun s\u00fcreli veriler (sepet, profil)<\/td>\n<\/tr>\n<tr>\n<td><strong>TempData<\/strong><\/td>\n<td>Bir sonraki istek<\/td>\n<td>Orta (Genelde Session\/Cookie tabanl\u0131)<\/td>\n<td>\u00c7ok \u0130yi (Tek kullan\u0131ml\u0131k)<\/td>\n<td>Ba\u015far\u0131\/Hata mesajlar\u0131, tek seferlik y\u00f6nlendirme verileri<\/td>\n<\/tr>\n<tr>\n<td><strong>IDistributedCache<\/strong><\/td>\n<td>Uygulama genelinde<\/td>\n<td>Y\u00fcksek (Do\u011fru yap\u0131land\u0131rmayla)<\/td>\n<td>\u00c7ok \u0130yi (H\u0131zl\u0131 eri\u015fim)<\/td>\n<td>S\u0131k eri\u015filen, statik veya az de\u011fi\u015fen veriler (\u00fcr\u00fcn kategorileri)<\/td>\n<\/tr>\n<tr>\n<td><strong>LocalStorage<\/strong><\/td>\n<td>Taray\u0131c\u0131, kal\u0131c\u0131<\/td>\n<td>D\u00fc\u015f\u00fck (XSS riski, \u015fifreleme gerekli)<\/td>\n<td>\u00c7ok \u0130yi (Client-side)<\/td>\n<td>Kullan\u0131c\u0131 tercihleri, b\u00fcy\u00fck, hassas olmayan veriler<\/td>\n<\/tr>\n<tr>\n<td><strong>SessionStorage<\/strong><\/td>\n<td>Taray\u0131c\u0131, sekme bazl\u0131<\/td>\n<td>D\u00fc\u015f\u00fck (XSS riski, \u015fifreleme gerekli)<\/td>\n<td>\u00c7ok \u0130yi (Client-side)<\/td>\n<td>\u00c7ok ad\u0131ml\u0131 form ge\u00e7ici verileri<\/td>\n<\/tr>\n<tr>\n<td><strong>Cookieler<\/strong><\/td>\n<td>Taray\u0131c\u0131, sunucuya g\u00f6nderilir<\/td>\n<td>Orta (HttpOnly, Secure, SameSite ile)<\/td>\n<td>Orta (Her istekte g\u00f6nderilir)<\/td>\n<td>Kimlik do\u011frulama tokenlar\u0131, k\u00fc\u00e7\u00fck tercihler<\/td>\n<\/tr>\n<tr>\n<td><strong>Hidden Fields<\/strong><\/td>\n<td>Sayfa bazl\u0131<\/td>\n<td>D\u00fc\u015f\u00fck (Kolayca manip\u00fcle edilebilir)<\/td>\n<td>K\u00f6t\u00fc (Sayfa boyutu artar)<\/td>\n<td>K\u00fc\u00e7\u00fck, hassas olmayan, sayfada kalmas\u0131 gereken veriler<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u00d6rnek Bir Mimari Model: Katmanl\u0131 Yakla\u015f\u0131m ve Sorumluluklar\u0131n Ayr\u0131lmas\u0131<\/h3>\n<p>WebForms Core 2 uygulamalar\u0131nda durum y\u00f6netimi mimarisi tasarlarken, sorumluluklar\u0131n ayr\u0131lmas\u0131 (separation of concerns) prensibini benimsemek \u00e7ok \u00f6nemlidir. Bu, uygulaman\u0131n daha bak\u0131m\u0131 yap\u0131labilir, test edilebilir ve \u00f6l\u00e7eklenebilir olmas\u0131n\u0131 sa\u011flar.<\/p>\n<ol>\n<li><strong>Sunum Katman\u0131 (UI Layer):<\/strong> Bu katmanda genellikle client-side depolama (LocalStorage, SessionStorage, Cookieler) veya Hidden Fields kullan\u0131l\u0131r. Ama\u00e7, kullan\u0131c\u0131 etkile\u015fimlerinden gelen anl\u0131k verileri tutmak ve sunucuya g\u00f6ndermektir. JavaScript ile DOM manip\u00fclasyonlar\u0131 ve AJAX \u00e7a\u011fr\u0131lar\u0131 bu katmanda yo\u011funla\u015f\u0131r.<\/li>\n<li><strong>\u0130\u015f Katman\u0131 (Business Logic Layer):<\/strong> \u0130\u015f kurallar\u0131 ve domain mant\u0131\u011f\u0131n\u0131n uyguland\u0131\u011f\u0131 katmand\u0131r. Bu katman, sunum katman\u0131ndan gelen verileri i\u015fler ve gerekirse kal\u0131c\u0131 depolama veya \u00f6nbellekleme servislerine y\u00f6nlendirir. Durum y\u00f6netiminde <code>TempData<\/code> veya <code>Session<\/code> gibi ara\u00e7lar, kullan\u0131c\u0131ya \u00f6zel i\u015f ak\u0131\u015flar\u0131n\u0131 y\u00f6netmek i\u00e7in bu katmanda kullan\u0131labilir.<\/li>\n<li><strong>Veri Eri\u015fim Katman\u0131 (Data Access Layer - DAL):<\/strong> Veritaban\u0131 veya harici servislerle etkile\u015fimi y\u00f6netir. <code>IDistributedCache<\/code> gibi da\u011f\u0131t\u0131k \u00f6nbellekleme \u00e7\u00f6z\u00fcmleri, bu katmanda s\u0131k\u00e7a eri\u015filen verileri \u00f6nbelle\u011fe almak i\u00e7in kullan\u0131l\u0131r. Bu, veritaban\u0131 y\u00fck\u00fcn\u00fc azalt\u0131r ve performans\u0131 art\u0131r\u0131r.<\/li>\n<\/ol>\n<pre><code>\n    \/\/ Basit bir IUserService tan\u0131m\u0131\n    public interface IUserService\n    {\n        Task<UserProfile> GetUserProfileAsync(string userId);\n        Task UpdateUserProfileAsync(UserProfile profile);\n    }\n\n    \/\/ IDistributedCache kullanan bir uygulama servisi\n    public class UserProfileService : IUserService\n    {\n        private readonly IDistributedCache _cache;\n        private readonly IUserRepository _userRepository; \/\/ Veritaban\u0131 eri\u015fimi i\u00e7in\n\n        public UserProfileService(IDistributedCache cache, IUserRepository userRepository)\n        {\n            _cache = cache;\n            _userRepository = userRepository;\n        }\n\n        public async Task<UserProfile> GetUserProfileAsync(string userId)\n        {\n            string cacheKey = $\"UserProfile:{userId}\";\n            var cachedProfile = await _cache.GetAsync(cacheKey);\n\n            if (cachedProfile != null)\n            {\n                \/\/ \u00d6nbellekten okuma\n                return JsonConvert.DeserializeObject<UserProfile>(Encoding.UTF8.GetString(cachedProfile));\n            }\n\n            \/\/ Veritaban\u0131ndan \u00e7ekme\n            var userProfile = await _userRepository.GetUserProfileFromDbAsync(userId);\n            if (userProfile != null)\n            {\n                \/\/ \u00d6nbelle\u011fe yazma\n                var jsonProfile = JsonConvert.SerializeObject(userProfile);\n                await _cache.SetAsync(cacheKey, Encoding.UTF8.GetBytes(jsonProfile),\n                                      new DistributedCacheEntryOptions().SetSlidingExpiration(TimeSpan.FromMinutes(10)));\n            }\n            return userProfile;\n        }\n\n        public async Task UpdateUserProfileAsync(UserProfile profile)\n        {\n            await _userRepository.UpdateUserProfileInDbAsync(profile);\n            \/\/ \u00d6nbelle\u011fi g\u00fcncelle veya ge\u00e7ersiz k\u0131l\n            await _cache.RemoveAsync($\"UserProfile:{profile.UserId}\");\n        }\n    }\n    <\/pre>\n<p><\/code><\/p>\n<div class=\"expert-tip\">\n        Uzman \u0130pucu: Dependency Injection (Ba\u011f\u0131ml\u0131l\u0131k Enjeksiyonu) kullanarak, servislerinizin <code>IDistributedCache<\/code> gibi ba\u011f\u0131ml\u0131l\u0131klar\u0131n\u0131 kolayca y\u00f6netin. Bu, kodunuzu daha mod\u00fcler ve test edilebilir hale getirir.\n    <\/div>\n<h3>Micro-frontend veya Bile\u015fen Tabanl\u0131 Yakla\u015f\u0131mlar\u0131n Durum Y\u00f6netimine Etkisi<\/h3>\n<p>G\u00fcn\u00fcm\u00fcz\u00fcn karma\u015f\u0131k uygulamalar\u0131nda micro-frontend veya bile\u015fen tabanl\u0131 yakla\u015f\u0131mlar pop\u00fclerlik kazanmaktad\u0131r. Bu mimarilerde, her bile\u015fen veya micro-frontend kendi durumunu ba\u011f\u0131ms\u0131z olarak y\u00f6netebilir. Durum, genellikle component'in i\u00e7indeki yerel bir state olarak veya bir \"global state\" y\u00f6netim k\u00fct\u00fcphanesi (\u00f6rn. React'ta Redux, Vue'da Vuex, veya genel olarak Event Bus) arac\u0131l\u0131\u011f\u0131yla payla\u015f\u0131labilir. WebForms Core 2, tam olarak bir SPA (Single Page Application) framework'\u00fc olmasa da, modern JavaScript k\u00fct\u00fcphanelerini entegre ederek bu t\u00fcr bile\u015fen bazl\u0131 durum y\u00f6netimini uygulayabilir. Bu durumda, WebForms Core 2 sayfalar\u0131, \u00e7e\u015fitli JavaScript bile\u015fenleri i\u00e7in bir \"ana kapsay\u0131c\u0131\" g\u00f6revi g\u00f6rebilir ve durumun b\u00fcy\u00fck bir k\u0131sm\u0131 istemci taraf\u0131nda y\u00f6netilebilir.<\/p>\n<p>Bir uygulaman\u0131n durum y\u00f6netimini tasarlarken, yukar\u0131daki y\u00f6ntemleri dikkatlice de\u011ferlendirmek ve uygulaman\u0131n \u00f6zel gereksinimlerine en uygun kombinasyonu se\u00e7mek hayati \u00f6nem ta\u015f\u0131r. G\u00fcvenlik, performans, \u00f6l\u00e7eklenebilirlik ve bak\u0131m kolayl\u0131\u011f\u0131 gibi fakt\u00f6rleri dengelemek, ba\u015far\u0131l\u0131 bir WebForms Core 2 uygulamas\u0131n\u0131n temelini olu\u015fturur.<\/p>\n<h2>Sonu\u00e7 ve S\u0131k\u00e7a Sorulan Sorular<\/h2>\n<p>WebForms Core 2 ile durum y\u00f6netimi, geleneksel WebForms'un sundu\u011fu kolayl\u0131klar\u0131 modern ASP.NET Core'un performans ve \u00f6l\u00e7eklenebilirlik avantajlar\u0131yla birle\u015ftiren dinamik bir aland\u0131r. Bu makale boyunca, ViewState'in yerini alan modern yakla\u015f\u0131mlardan, sunucu taraf\u0131 durum y\u00f6netiminde IDistributedCache ve TempData'n\u0131n etkin kullan\u0131m\u0131na, client-side depolaman\u0131n g\u00fcvenlik pratiklerine ve g\u00fc\u00e7l\u00fc bir mimari tasar\u0131m\u0131n \u00f6nemine de\u011findik. Geli\u015ftiriciler olarak, WebForms Core 2'nin sa\u011flad\u0131\u011f\u0131 bu yeni \u00f6zelliklerle, daha h\u0131zl\u0131, daha g\u00fcvenli ve daha esnek web uygulamalar\u0131 in\u015fa edebiliriz.<\/p>\n<p>Unutulmamal\u0131d\u0131r ki, do\u011fru durum y\u00f6netimi stratejisini se\u00e7mek, uygulaman\u0131z\u0131n performans\u0131n\u0131, kullan\u0131c\u0131 deneyimini ve bak\u0131m kolayl\u0131\u011f\u0131n\u0131 do\u011frudan etkiler. Verinin hassasiyeti, \u00f6mr\u00fc, boyutu ve eri\u015fim gereksinimleri gibi fakt\u00f6rleri g\u00f6z \u00f6n\u00fcnde bulundurarak en uygun \u00e7\u00f6z\u00fcm\u00fc bulmak, ba\u015far\u0131l\u0131 bir projenin anahtar\u0131d\u0131r. Modern ara\u00e7lar ve pratiklerle, WebForms Core 2, geli\u015ftiricilere g\u00fc\u00e7l\u00fc ve esnek bir platform sunmaktad\u0131r.<\/p>\n<h3>S\u0131k\u00e7a Sorulan Sorular (SSS)<\/h3>\n<ol>\n<li>\n<h4>WebForms Core 2'de ViewState tamamen kalkt\u0131 m\u0131?<\/h4>\n<p>Hay\u0131r, \"tamamen kalkt\u0131\" demek yerine, geleneksel ASP.NET WebForms'taki gibi yerle\u015fik ve otomatik bir <code>ViewState<\/code> mekanizmas\u0131 bulunmamaktad\u0131r. WebForms Core 2, ASP.NET Core'un stateless yap\u0131s\u0131n\u0131 benimser. Ancak, ayn\u0131 amaca hizmet eden gizli alanlar, taray\u0131c\u0131 depolamas\u0131 (LocalStorage), session veya TempData gibi alternatif y\u00f6ntemlerle benzer i\u015flevsellikler sa\u011flanabilir.<\/p>\n<\/li>\n<li>\n<h4>IDistributedCache ile Session kullanmak, bellek i\u00e7i Session'a g\u00f6re ne gibi avantajlar sa\u011flar?<\/h4>\n<p><code>IDistributedCache<\/code> ile <code>Session<\/code> kullanmak, uygulaman\u0131z\u0131n yatay olarak \u00f6l\u00e7eklenebilirli\u011fini \u00f6nemli \u00f6l\u00e7\u00fcde art\u0131r\u0131r. Bellek i\u00e7i <code>Session<\/code> sadece o sunucu \u00f6rne\u011fine ba\u011fl\u0131 oldu\u011fu i\u00e7in, birden fazla sunucuda \u00e7al\u0131\u015fan uygulamalarda \"yap\u0131\u015fkan oturumlar\" gerektirir ve sunucu belle\u011fini t\u00fcketir. <code>IDistributedCache<\/code> (\u00f6rne\u011fin Redis veya SQL Server tabanl\u0131) ise <code>Session<\/code> verilerini harici, payla\u015f\u0131lan bir depolama biriminde tutar, bu sayede kullan\u0131c\u0131 istekleri farkl\u0131 sunuculara y\u00f6nlendirilse bile oturum verilerine eri\u015filebilir ve sunucu belle\u011fi \u00fczerindeki y\u00fck azal\u0131r.<\/p>\n<\/li>\n<li>\n<h4>Client-side depolama (LocalStorage\/SessionStorage) ne zaman tercih edilmeli, ne zaman ka\u00e7\u0131n\u0131lmal\u0131?<\/h4>\n<p>Client-side depolama, sunucu y\u00fck\u00fcn\u00fc azaltmak, sayfa y\u00fckleme s\u00fcrelerini iyile\u015ftirmek ve kullan\u0131c\u0131 deneyimini zenginle\u015ftirmek i\u00e7in (\u00f6rne\u011fin, kullan\u0131c\u0131 tercihleri, sepet i\u00e7eri\u011fi, ge\u00e7ici form verileri gibi) s\u0131k\u00e7a tercih edilmelidir. Ancak, kredi kart\u0131 bilgileri, API anahtarlar\u0131 veya hassas kimlik do\u011frulama tokenlar\u0131 gibi kritik ve gizli veriler asla do\u011frudan veya sadece client-side'da \u015fifrelenerek saklanmamal\u0131d\u0131r. XSS sald\u0131r\u0131lar\u0131na kar\u015f\u0131 savunmas\u0131z olduklar\u0131 i\u00e7in, hassas veriler i\u00e7in server-side session, secure cookieler veya token tabanl\u0131 kimlik do\u011frulama daha uygun ve g\u00fcvenli se\u00e7eneklerdir.<\/p>\n<\/li>\n<li>\n<h4>WebForms Core 2'de durum y\u00f6netiminde performans sorunlar\u0131n\u0131 nas\u0131l minimize edebilirim?<\/h4>\n<p>Performans\u0131 minimize etmek i\u00e7in \u015fu stratejileri izleyebilirsiniz: 1) Gereksiz sunucu taraf\u0131 durumunu tutmaktan ka\u00e7\u0131n\u0131n ve m\u00fcmk\u00fcn oldu\u011funca client-side depolama veya Cookieler kullan\u0131n (g\u00fcvenlik \u00f6nlemleriyle birlikte). 2) Da\u011f\u0131t\u0131k \u00f6nbellekleme (<code>IDistributedCache<\/code>) kullanarak veritaban\u0131 sorgular\u0131n\u0131 ve Session y\u00fck\u00fcn\u00fc azalt\u0131n. 3) AJAX \u00e7a\u011fr\u0131lar\u0131yla sadece ihtiya\u00e7 duyulan verileri \u00e7ekerek sayfa yenileme ihtiyac\u0131n\u0131 ortadan kald\u0131r\u0131n. 4) B\u00fcy\u00fck verileri Session yerine uygun bir \u00f6nbellek \u00e7\u00f6z\u00fcm\u00fcnde veya kal\u0131c\u0131 depolamada tutun. 5) Cookieler i\u00e7in <code>HttpOnly<\/code>, <code>Secure<\/code> bayraklar\u0131n\u0131 ve <code>SameSite=Lax<\/code> politikas\u0131n\u0131 kullanarak her istekle g\u00f6nderilen veri miktar\u0131n\u0131 optimize edin.<\/p>\n<\/li>\n<li>\n<h4>Mobil uyumlu bir WebForms Core 2 uygulamas\u0131nda durum y\u00f6netimi i\u00e7in \u00f6zel considerations nelerdir?<\/h4>\n<p>Mobil uyumlu uygulamalarda durum y\u00f6netimi i\u00e7in birka\u00e7 \u00f6nemli nokta vard\u0131r: 1) Sayfa boyutunu minimize etmek i\u00e7in <code>ViewState<\/code> benzeri b\u00fcy\u00fck gizli alanlardan ka\u00e7\u0131n\u0131n. 2) A\u011f gecikmelerini azaltmak i\u00e7in client-side depolamay\u0131 ve AJAX \u00e7a\u011fr\u0131lar\u0131n\u0131 ak\u0131ll\u0131ca kullan\u0131n. 3) Cookielerin boyutunu k\u00fc\u00e7\u00fck tutun ve <code>Secure<\/code> bayra\u011f\u0131n\u0131 zorunlu k\u0131l\u0131n (mobil cihazlar genellikle HTTPS kullan\u0131r). 4) Uygulaman\u0131n \u00e7evrimd\u0131\u015f\u0131 \u00e7al\u0131\u015fmas\u0131n\u0131 desteklemek i\u00e7in <code>LocalStorage<\/code>'\u0131 ve Service Worker'lar\u0131 de\u011ferlendirin. 5) Responsive tasar\u0131m prensiplerini uygulay\u0131n (\u00f6rne\u011fin bu makaledeki CSS media query \u00f6rne\u011fi gibi) ve mobil cihazlarda performans i\u00e7in gereksiz JavaScript y\u00fck\u00fcn\u00fc azalt\u0131n.<\/p>\n<\/li>\n<\/ol>\n<p><\/body><\/p>\n","protected":false},"excerpt":{"rendered":"WebForms Core 2&#8217;de Durum Y\u00f6netimi: Yeni \u00d6zelliklerle Kontrol\u00fc Art\u0131rma WebForms Core 2 ortam\u0131nda durum y\u00f6netimi, geli\u015ftiricilerin s\u0131k\u00e7a kar\u015f\u0131la\u015ft\u0131\u011f\u0131&hellip;","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_page_header_type":"","csco_page_load_nextpost":"","csco_page_subscribe_form":"","csco_page_contact_form":"","footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-34211","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-genel","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.5 (Yoast SEO v25.3.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>WebForms Core 2 ve Durum Y\u00f6netimi Neden Bu Kadar \u00d6nemli?<\/title>\n<meta name=\"description\" content=\"WebForms Core 2 ortam\u0131nda durum y\u00f6netimi, geli\u015ftiricilerin s\u0131k\u00e7a kar\u015f\u0131la\u015ft\u0131\u011f\u0131 karma\u015f\u0131k ancak kritik bir konudur. Bu makalede, uygulamalar\u0131n\u0131z\u0131n performans\u0131n\u0131 ve kullan\u0131c\u0131 deneyimini iyile\u015ftirmek i\u00e7in modern ASP.NET Core yakla\u015f\u0131mlar\u0131n\u0131 kullanarak sayfalar aras\u0131 veri ak\u0131\u015f\u0131n\u0131 nas\u0131l daha etkin hale getirebilece\u011finizi ad\u0131m ad\u0131m ke\u015ffedeceksiniz. G\u00fcvenli ve \u00f6l\u00e7eklenebilir bir durum y\u00f6netimi stratejisi olu\u015fturman\u0131n inceliklerini bu rehberle \u00f6\u011frenin.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/fatihsoysal.com\/blog\/webforms-core-2-ve-durum-yonetimi-neden-bu-kadar-onemli\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"WebForms Core 2 ve Durum Y\u00f6netimi Neden Bu Kadar \u00d6nemli?\" \/>\n<meta property=\"og:description\" content=\"WebForms Core 2 ortam\u0131nda durum y\u00f6netimi, geli\u015ftiricilerin s\u0131k\u00e7a kar\u015f\u0131la\u015ft\u0131\u011f\u0131 karma\u015f\u0131k ancak kritik bir konudur. 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