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Xml.Render(HtmlTextWriter) Methode

  • Referenz

Definition

Namespace:
System.Web.UI.WebControls
Assembly:
System.Web.dll

Gibt die Ergebnisse im Ausgabestream wieder.

protected:
 override void Render(System::Web::UI::HtmlTextWriter ^ output);
protected public:
 override void Render(System::Web::UI::HtmlTextWriter ^ output);
protected override void Render (System.Web.UI.HtmlTextWriter output);
protected internal override void Render (System.Web.UI.HtmlTextWriter output);
override this.Render : System.Web.UI.HtmlTextWriter -> unit
Protected Overrides Sub Render (output As HtmlTextWriter)
Protected Friend Overrides Sub Render (output As HtmlTextWriter)

Parameter

output
HtmlTextWriter

Das Ergebnis des Ausgabestreams.

Beispiele

Im folgenden Codebeispiel wird veranschaulicht, wie die Render -Methode in einem benutzerdefinierten Serversteuerelement überschrieben wird, sodass das Xml Steuerelement immer mit einem Bild angezeigt wird.

<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.CS.Controls" Assembly="Samples.AspNet.CS" %>
<%@ Page Language="C#" AutoEventWireup="True" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
    <head>
        <title>Custom Xml - Render - C# Example</title>
    </head>
    <body>
        <form id="Form1" method="post" runat="server">
            <h3>Custom Xml - Render - C# Example</h3>
            
            <aspSample:CustomXmlRender 
              id="xml1" 
              runat="server" 
              DocumentSource="People.xml" 
              TransformSource="PeopleTable.xslt" />
              
        </form>
    </body>
</html>

<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.VB.Controls" Assembly="Samples.AspNet.VB" %>
<%@ Page Language="VB" AutoEventWireup="True" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
    <head>
        <title>Custom Xml - Render - VB.NET Example</title>
    </head>
    <body>
        <form id="Form1" method="post" runat="server">
            <h3>Custom Xml - Render - VB.NET Example</h3>
            
            <aspSample:CustomXmlRender id="xml1" runat="server" 
             DocumentSource="People.xml" TransformSource="PeopleTable.xslt" />
        </form>
    </body>
</html>

using System.Web;
using System.Security.Permissions;

namespace Samples.AspNet.CS.Controls
{
  [AspNetHostingPermission(SecurityAction.Demand, Level=AspNetHostingPermissionLevel.Minimal)]
  public sealed class CustomXmlRender : System.Web.UI.WebControls.Xml
  {
    protected override void Render(System.Web.UI.HtmlTextWriter writer)
    {
      // Create and render a new Image web control.
      System.Web.UI.WebControls.Image image = new System.Web.UI.WebControls.Image();
      image.ID = "Image1";
      image.ImageUrl = "image.jpg";	
      image.AlternateText = "Image for XML.";
      image.RenderControl(writer);

      // Call the base class's Render method.
      base.Render(writer);
    }
  }
}

Imports System.Web
Imports System.Security.Permissions

Namespace Samples.AspNet.VB.Controls
    <AspNetHostingPermission(SecurityAction.Demand, Level:=AspNetHostingPermissionLevel.Minimal)> _
    Public NotInheritable Class CustomXmlRender
        Inherits System.Web.UI.WebControls.Xml

        Protected Overrides Sub Render(ByVal writer As System.Web.UI.HtmlTextWriter)

            ' Create and render a new Image web control.
            Dim image As New System.Web.UI.WebControls.Image
            image.ID = "Image1"
            image.ImageUrl = "image.jpg"
            image.AlternateText = "Image for XML."
            image.RenderControl(writer)

            ' Call the base class's Render method.
            MyBase.Render(writer)
        End Sub
    End Class
End Namespace

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