{"id":36715,"date":"2025-12-22T01:30:42","date_gmt":"2025-12-21T22:30:42","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/asp-net-coreda-idisplaymetadataprovider-ile-model-metadata-yonetimini-ozellestirme\/"},"modified":"2025-12-22T01:30:42","modified_gmt":"2025-12-21T22:30:42","slug":"asp-net-coreda-idisplaymetadataprovider-ile-model-metadata-yonetimini-ozellestirme","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/asp-net-coreda-idisplaymetadataprovider-ile-model-metadata-yonetimini-ozellestirme\/","title":{"rendered":"ASP.NET Core’da IDisplayMetadataProvider ile Model Metadata Y\u00f6netimini \u00d6zelle\u015ftirme"},"content":{"rendered":"

ASP.NET Core’da IDisplayMetadataProvider ile Model Metadata Y\u00f6netimini \u00d6zelle\u015ftirme<\/h2>\n

\n ASP.NET Core MVC, web uygulamalar\u0131nda veri modelleme ve bu verilerin kullan\u0131c\u0131 aray\u00fcz\u00fcnde (UI) nas\u0131l g\u00f6r\u00fcnt\u00fclenece\u011fi veya d\u00fczenlenece\u011fi konusunda g\u00fc\u00e7l\u00fc bir yap\u0131 sunar. Bu yap\u0131n\u0131n temel ta\u015flar\u0131ndan biri de Model Metadata<\/strong>‘d\u0131r. Model metadata, bir model s\u0131n\u0131f\u0131n\u0131n veya \u00f6zelli\u011finin (property) g\u00f6r\u00fcnt\u00fclenecek ad\u0131, a\u00e7\u0131klama metni, g\u00f6r\u00fcnt\u00fcleme format\u0131, do\u011frulama kurallar\u0131 gibi bilgileri i\u00e7erir. Varsay\u0131lan olarak, ASP.NET Core bu metadata bilgilerini model s\u0131n\u0131flar\u0131ndaki veri a\u00e7\u0131klamas\u0131 (data annotation) niteliklerinden (attributes) veya tip yans\u0131tmas\u0131ndan (type reflection) otomatik olarak t\u00fcretir. Ancak baz\u0131 durumlarda bu varsay\u0131lan davran\u0131\u015f yetersiz kalabilir. \u0130\u015fte tam bu noktada IDisplayMetadataProvider<\/code> aray\u00fcz\u00fc devreye girerek, model metadata olu\u015fturma s\u00fcrecini tamamen \u00f6zelle\u015ftirme ve geni\u015fletme imkan\u0131 sunar. Bu makalede, IDisplayMetadataProvider<\/code>‘\u0131n ne oldu\u011funu, nas\u0131l \u00e7al\u0131\u015ft\u0131\u011f\u0131n\u0131 ve ASP.NET Core uygulamalar\u0131n\u0131zda dinamik ve esnek UI y\u00f6netimi i\u00e7in nas\u0131l kullan\u0131labilece\u011fini detayl\u0131 bir \u015fekilde inceleyece\u011fiz.\n<\/p>\n

Giri\u015f: ASP.NET Core’da Model Metadata Y\u00f6netimi<\/h2>\n

Model Metadata Nedir ve Neden \u00d6nemlidir?<\/h3>\n

\n Model metadata, bir modeldeki \u00f6zellikler hakk\u0131nda a\u00e7\u0131klay\u0131c\u0131 bilgiler sa\u011flayan bir veri k\u00fcmesidir. \u00d6rne\u011fin, bir Kullanici<\/code> modelinde Ad<\/code> \u00f6zelli\u011finin kullan\u0131c\u0131ya “Kullan\u0131c\u0131 Ad\u0131” olarak g\u00f6sterilmesi, bir Tarih<\/code> \u00f6zelli\u011finin “GG.AA.YYYY” format\u0131nda g\u00f6r\u00fcnt\u00fclenmesi veya bir metin alan\u0131n\u0131n \u00e7ok sat\u0131rl\u0131 bir textarea olarak i\u015flenmesi gibi bilgiler metadata arac\u0131l\u0131\u011f\u0131yla y\u00f6netilir. Bu bilgiler, ASP.NET Core’un HTML yard\u0131mc\u0131lar\u0131 (HTML Helpers) veya Tag Helpers taraf\u0131ndan UI elemanlar\u0131 olu\u015fturulurken kullan\u0131l\u0131r. Do\u011fru metadata y\u00f6netimi, daha tutarl\u0131, eri\u015filebilir ve bak\u0131m\u0131 kolay kullan\u0131c\u0131 aray\u00fczleri olu\u015fturman\u0131n anahtar\u0131d\u0131r.\n<\/p>\n

Varsay\u0131lan Metadata Sa\u011flay\u0131c\u0131lar\u0131n S\u0131n\u0131rlar\u0131<\/h3>\n

\n ASP.NET Core, varsay\u0131lan olarak DataAnnotationsModelMetadataProvider<\/code> gibi sa\u011flay\u0131c\u0131lar arac\u0131l\u0131\u011f\u0131yla metadata olu\u015fturur. Bu sa\u011flay\u0131c\u0131lar, [DisplayName]<\/code>, [Required]<\/code>, [StringLength]<\/code> gibi veri a\u00e7\u0131klamas\u0131 niteliklerini okuyarak ilgili metadata \u00f6zelliklerini doldurur. \u00c7o\u011fu senaryoda bu yeterli olsa da, a\u015fa\u011f\u0131daki gibi durumlar varsay\u0131lan sa\u011flay\u0131c\u0131lar\u0131n s\u0131n\u0131rlar\u0131n\u0131 ortaya koyar:\n<\/p>\n

    \n
  • Metadata’n\u0131n dinamik olarak (\u00f6rne\u011fin, kullan\u0131c\u0131 rol\u00fcne veya veritaban\u0131 ayarlar\u0131na g\u00f6re) belirlenmesi gerekti\u011fi durumlar.<\/li>\n
  • Mevcut niteliklerin yetersiz kald\u0131\u011f\u0131 veya \u00f6zel bir UI davran\u0131\u015f\u0131n\u0131n gerekti\u011fi durumlar.<\/li>\n
  • D\u0131\u015f kaynaklardan (XML, JSON dosyalar\u0131, API’ler) metadata y\u00fckleme ihtiyac\u0131.<\/li>\n
  • Global olarak belirli bir tipteki t\u00fcm \u00f6zellikler i\u00e7in ortak bir metadata kural\u0131 tan\u0131mlama.<\/li>\n<\/ul>\n

    IDisplayMetadataProvider’\u0131n Rol\u00fc ve Amac\u0131<\/h3>\n

    \n IDisplayMetadataProvider<\/code> aray\u00fcz\u00fc, yukar\u0131da bahsedilen s\u0131n\u0131rlamalar\u0131 a\u015fmak i\u00e7in tasarlanm\u0131\u015ft\u0131r. Bu aray\u00fcz\u00fc uygulayarak, ASP.NET Core’un model metadata olu\u015fturma s\u00fcrecine kendi \u00f6zel mant\u0131\u011f\u0131n\u0131z\u0131 enjekte edebilirsiniz. Temel amac\u0131, ModelMetadata<\/code> nesnesini olu\u015fturulurken veya olu\u015fturulduktan sonra de\u011fi\u015ftirmek ve b\u00f6ylece \u00f6zelliklerin UI’da nas\u0131l g\u00f6r\u00fcnt\u00fclenece\u011fi veya d\u00fczenlenece\u011fi \u00fczerinde tam kontrol sa\u011flamakt\u0131r. Bu sayede, uygulaman\u0131z\u0131n gereksinimlerine g\u00f6re son derece esnek ve dinamik UI davran\u0131\u015flar\u0131 tan\u0131mlayabilirsiniz.\n<\/p>\n

    IDisplayMetadataProvider Aray\u00fcz\u00fc Detayl\u0131 \u0130nceleme<\/h2>\n

    Aray\u00fcz Tan\u0131m\u0131 ve CreateDisplayMetadata<\/code> Metodu<\/h3>\n

    \n IDisplayMetadataProvider<\/code> aray\u00fcz\u00fc olduk\u00e7a basittir ve yaln\u0131zca tek bir metot i\u00e7erir:\n<\/p>\n

    \nnamespace Microsoft.AspNetCore.Mvc.ModelBinding.Metadata\n{\n    public interface IDisplayMetadataProvider : IMetadataDetailsProvider\n    {\n        void CreateDisplayMetadata(DisplayMetadataProviderContext context);\n    }\n}\n<\/pre>\n
    <\/code><\/p>\n
    \n    Bu metot, her bir model \u00f6zelli\u011fi veya model tipi i\u00e7in metadata olu\u015fturulurken \u00e7a\u011fr\u0131l\u0131r. Geli\u015ftiricinin t\u00fcm \u00f6zelle\u015ftirme mant\u0131\u011f\u0131n\u0131 bu metot i\u00e7erisinde ger\u00e7ekle\u015ftirmesi beklenir.\n<\/p>\n
    DisplayMetadataProviderContext<\/code> Nesnesi<\/h3>\n
    \n    CreateDisplayMetadata<\/code> metoduna parametre olarak ge\u00e7en DisplayMetadataProviderContext<\/code> nesnesi, \u00f6zelle\u015ftirme i\u015flemi i\u00e7in gerekli t\u00fcm bilgileri sa\u011flar. Bu nesne a\u015fa\u011f\u0131daki \u00f6nemli \u00f6zelliklere sahiptir:\n<\/p>\n
      \n
    • Metadata<\/code>: \u00dczerinde de\u011fi\u015fiklik yapaca\u011f\u0131n\u0131z DisplayMetadata<\/code> nesnesini i\u00e7erir. Bu nesne, \u00f6zelliklerin g\u00f6r\u00fcnt\u00fclenme ve d\u00fczenlenme \u015feklini kontrol eden bir\u00e7ok \u00f6zelli\u011fe sahiptir (DisplayName, Description, TemplateHint, IsReadOnly vb.).<\/li>\n
    • Key<\/code>: Metadata'n\u0131n olu\u015fturuldu\u011fu model veya \u00f6zelli\u011fin anahtar\u0131n\u0131 (ModelMetadataIdentity<\/code>) i\u00e7erir. Bu anahtar, \u00f6zelli\u011fin tipi, ad\u0131 ve kapsay\u0131c\u0131 tipi gibi bilgileri bar\u0131nd\u0131r\u0131r.<\/li>\n
    • Attributes<\/code>: Model veya \u00f6zellik \u00fczerinde tan\u0131mlanm\u0131\u015f t\u00fcm .NET niteliklerini (attributes) i\u00e7erir. Bu sayede, kendi \u00f6zel niteliklerinizi tan\u0131mlayarak metadata davran\u0131\u015f\u0131n\u0131 tetikleyebilirsiniz.<\/li>\n<\/ul>\n
      \n    Bu ba\u011flam nesnesi sayesinde, hangi \u00f6zellik i\u00e7in metadata olu\u015fturuldu\u011funu anlayabilir ve buna g\u00f6re dinamik kararlar alabilirsiniz.\n<\/p>\n
      ModelMetadata<\/code> Nesnesini Anlamak<\/h3>\n
      \n    DisplayMetadataProviderContext.Metadata<\/code> \u00f6zelli\u011fi arac\u0131l\u0131\u011f\u0131yla eri\u015fti\u011fimiz DisplayMetadata<\/code> nesnesi, asl\u0131nda ModelMetadata<\/code> s\u0131n\u0131f\u0131n\u0131n bir par\u00e7as\u0131d\u0131r ve bir \u00f6zelli\u011fin veya modelin UI ile ilgili t\u00fcm bilgilerini tutar. Bu nesnenin de\u011fi\u015ftirebilece\u011finiz baz\u0131 \u00f6nemli \u00f6zellikleri \u015funlard\u0131r:\n<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
      \u00d6zellik Ad\u0131<\/th>\nA\u00e7\u0131klama<\/th>\n<\/tr>\n<\/thead>\n
      DisplayName<\/code><\/td>\n\u00d6zelli\u011fin kullan\u0131c\u0131ya g\u00f6sterilecek ad\u0131.<\/td>\n<\/tr>\n
      Description<\/code><\/td>\n\u00d6zellik hakk\u0131nda k\u0131sa bir a\u00e7\u0131klama.<\/td>\n<\/tr>\n
      TemplateHint<\/code><\/td>\n\u00d6zelli\u011fi i\u015flemek i\u00e7in kullan\u0131lacak g\u00f6r\u00fcnt\u00fcleme \u015fablonunun (display template) ad\u0131.<\/td>\n<\/tr>\n
      IsReadOnly<\/code><\/td>\n\u00d6zelli\u011fin d\u00fczenlenebilir olup olmad\u0131\u011f\u0131n\u0131 belirtir.<\/td>\n<\/tr>\n
      ShowForDisplay<\/code><\/td>\n\u00d6zelli\u011fin g\u00f6r\u00fcnt\u00fcleme modunda g\u00f6sterilip g\u00f6sterilmeyece\u011fi.<\/td>\n<\/tr>\n
      ShowForEdit<\/code><\/td>\n\u00d6zelli\u011fin d\u00fczenleme modunda g\u00f6sterilip g\u00f6sterilmeyece\u011fi.<\/td>\n<\/tr>\n
      Order<\/code><\/td>\n\u00d6zelliklerin UI'da s\u0131ralanma d\u00fczeni.<\/td>\n<\/tr>\n
      NullDisplayText<\/code><\/td>\nDe\u011fer null oldu\u011funda g\u00f6sterilecek metin.<\/td>\n<\/tr>\n
      Placeholder<\/code><\/td>\nGiri\u015f alanlar\u0131 i\u00e7in yer tutucu metin.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
      \n    Bu \u00f6zellikler \u00fczerinde de\u011fi\u015fiklik yaparak, ASP.NET Core'un UI olu\u015fturma davran\u0131\u015f\u0131n\u0131 do\u011frudan etkileyebilirsiniz.\n<\/p>\n
      \u00d6zel Bir IDisplayMetadataProvider Uygulamas\u0131 Geli\u015ftirme<\/h2>\n
      Temel Bir Uygulama Ad\u0131mlar\u0131<\/h3>\n
      \n    \u00d6zel bir IDisplayMetadataProvider<\/p>\n","protected":false},"excerpt":{"rendered":"ASP.NET Core MVC, web uygulamalar\u0131nda veri modelleme ve bu verilerin kullan\u0131c\u0131 aray\u00fcz\u00fcnde (UI) nas\u0131l g\u00f6r\u00fcnt\u00fclenece\u011fi veya d\u00fczenlenece\u011fi konusunda…","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":[1340],"tags":[],"class_list":{"0":"post-36715","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-net","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"\nASP.NET Core'da IDisplayMetadataProvider ile Model Metadata Y\u00f6netimini \u00d6zelle\u015ftirme - Kodlar\u0131n Gizemli D\u00fcnyas\u0131<\/title>\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\/asp-net-coreda-idisplaymetadataprovider-ile-model-metadata-yonetimini-ozellestirme\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"ASP.NET Core'da IDisplayMetadataProvider ile Model Metadata Y\u00f6netimini \u00d6zelle\u015ftirme\" \/>\n<meta property=\"og:description\" content=\"ASP.NET Core MVC, web uygulamalar\u0131nda veri modelleme ve bu verilerin kullan\u0131c\u0131 aray\u00fcz\u00fcnde (UI) nas\u0131l g\u00f6r\u00fcnt\u00fclenece\u011fi veya d\u00fczenlenece\u011fi konusunda...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/fatihsoysal.com\/blog\/asp-net-coreda-idisplaymetadataprovider-ile-model-metadata-yonetimini-ozellestirme\/\" \/>\n<meta property=\"og:site_name\" content=\"Kodlar\u0131n Gizemli D\u00fcnyas\u0131\" \/>\n<meta property=\"article:published_time\" content=\"2025-12-21T22:30:42+00:00\" \/>\n<meta name=\"author\" content=\"Fatih Soysal\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Yazan:\" \/>\n\t<meta name=\"twitter:data1\" content=\"Fatih Soysal\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tahmini okuma s\u00fcresi\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 dakika\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/asp-net-coreda-idisplaymetadataprovider-ile-model-metadata-yonetimini-ozellestirme\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/asp-net-coreda-idisplaymetadataprovider-ile-model-metadata-yonetimini-ozellestirme\/\"},\"author\":{\"name\":\"Fatih Soysal\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"headline\":\"ASP.NET Core’da IDisplayMetadataProvider ile Model Metadata Y\u00f6netimini \u00d6zelle\u015ftirme\",\"datePublished\":\"2025-12-21T22:30:42+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/asp-net-coreda-idisplaymetadataprovider-ile-model-metadata-yonetimini-ozellestirme\/\"},\"wordCount\":908,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"articleSection\":[\".NET\"],\"inLanguage\":\"tr\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/fatihsoysal.com\/blog\/asp-net-coreda-idisplaymetadataprovider-ile-model-metadata-yonetimini-ozellestirme\/#respond\"]}],\"copyrightYear\":\"2025\",\"copyrightHolder\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/asp-net-coreda-idisplaymetadataprovider-ile-model-metadata-yonetimini-ozellestirme\/\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/asp-net-coreda-idisplaymetadataprovider-ile-model-metadata-yonetimini-ozellestirme\/\",\"name\":\"ASP.NET Core'da IDisplayMetadataProvider ile Model Metadata Y\u00f6netimini \u00d6zelle\u015ftirme - 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