Page.CreateHtmlTextWriter(TextWriter) Метод

Определение

Пространство имен:
System.Web.UI
Сборка:
System.Web.dll

Создает объект HtmlTextWriter для отображения содержимого страницы.Creates an HtmlTextWriter object to render the page's content.

protected public:
 virtual System::Web::UI::HtmlTextWriter ^ CreateHtmlTextWriter(System::IO::TextWriter ^ tw);
protected internal virtual System.Web.UI.HtmlTextWriter CreateHtmlTextWriter (System.IO.TextWriter tw);
abstract member CreateHtmlTextWriter : System.IO.TextWriter -> System.Web.UI.HtmlTextWriter
override this.CreateHtmlTextWriter : System.IO.TextWriter -> System.Web.UI.HtmlTextWriter
Protected Friend Overridable Function CreateHtmlTextWriter (tw As TextWriter) As HtmlTextWriter

Параметры

tw
TextWriter

Экземпляр класса TextWriter, используемый для создания HtmlTextWriter.The TextWriter used to create the HtmlTextWriter.

Возвраты

HtmlTextWriter

HtmlTextWriter или Html32TextWriter.An HtmlTextWriter or Html32TextWriter.

Примеры

В следующем примере кода используется метод CreateHtmlTextWriter для создания экземпляра пользовательского HtmlTextWriter объекта с именем MyHtmlTextWriter.The following code example uses the CreateHtmlTextWriter method to create an instance of a custom HtmlTextWriter object named MyHtmlTextWriter. Метод CreateHtmlTextWriter переопределен в классе MyPage, который является производным от Page, поэтому MyHtmlTextWriter отображает серверные элементы управления ASP.NET при запросе страницы.The CreateHtmlTextWriter method is overridden in the MyPage class, which is derived from Page, so that MyHtmlTextWriter renders ASP.NET server controls when the page is requested. Обратите внимание, что в этом примере поведение адаптера TextWriter будет предотвращено.Note that this example will prevent adapter TextWriter behavior.

namespace WebPage
{
   using System;
   using System.IO;
   using System.Web.UI;

   public class MyPage : Page
   {
      public MyPage():base()
      {
      }

      [System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name="FullTrust")] 
      protected override HtmlTextWriter CreateHtmlTextWriter(TextWriter writer)
      {
         return new MyHtmlTextWriter(writer);
      }

      [System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name="FullTrust")] 
      protected override void Render(HtmlTextWriter writer)
      {         
         // Write a Font control.
         writer.AddAttribute("color", "red");
         writer.AddAttribute("size", "6pt");
         writer.RenderBeginTag(HtmlTextWriterTag.Font);
         writer.Write("<br>" + "The time on the server:<br> " + System.DateTime.Now.ToLongTimeString());
         writer.RenderEndTag();
      }
   }

   public class MyHtmlTextWriter : HtmlTextWriter
   {
      public MyHtmlTextWriter(TextWriter writer):base(writer)
      {
         writer.Write("<font color=blue> 'MyHtmlTextWriter' is used for rendering.</font>");
      }
   }

}


Imports System.IO
Imports System.Web.UI

Namespace WebPage

    
   Public Class MyPage
      Inherits Page
      
      Public Sub New()
         MyBase.New()
      End Sub

      <System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.Demand, Name:="FullTrust")> _
      Protected Overrides Function CreateHtmlTextWriter(ByVal writer As TextWriter) As HtmlTextWriter
         Return New MyHtmlTextWriter(writer)
      End Function 'CreateHtmlTextWriter

      <System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.Demand, Name:="FullTrust")> _
      Protected Overrides Sub Render(ByVal writer As HtmlTextWriter)
         ' Writes a Font control.
         writer.AddAttribute("color", "red")
         writer.AddAttribute("size", "6pt")
         writer.RenderBeginTag(HtmlTextWriterTag.Font)
         writer.Write(("<br>" + "The time on the server:<br> " + System.DateTime.Now.ToLongTimeString()))
         writer.RenderEndTag()
      End Sub
   End Class
    

   Public Class MyHtmlTextWriter
      Inherits HtmlTextWriter
      
      Public Sub New(writer As TextWriter)
         MyBase.New(writer)
         writer.Write("<font color=blue> 'MyHtmlTextWriter' is used for rendering.</font>")
      End Sub
   End Class
End Namespace 'WebPage

Комментарии

Метод CreateHtmlTextWriter создает TextWriter с помощью свойства Browser объекта Request, связанного с запросом страницы.The CreateHtmlTextWriter method creates a TextWriter through the Browser property of the Request object associated with the page request. В раздел конфигурации browserCaps можно добавить ссылку на HtmlTextWriter.You can add a reference to an HtmlTextWriter in the browserCaps configuration section. Переопределите метод CreateHtmlTextWriter для выполнения пользовательского поиска.Override the CreateHtmlTextWriter method to perform custom lookup.

Применяется к

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