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HtmlAnchor.RenderAttributes(HtmlTextWriter) Methode

  • Referenz

Definition

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

Rendert die Attribute des HtmlAnchor-Steuerelements in das angegebene HtmlTextWriter-Objekt.

protected:
 override void RenderAttributes(System::Web::UI::HtmlTextWriter ^ writer);
protected override void RenderAttributes (System.Web.UI.HtmlTextWriter writer);
override this.RenderAttributes : System.Web.UI.HtmlTextWriter -> unit
Protected Overrides Sub RenderAttributes (writer As HtmlTextWriter)

Parameter

writer
HtmlTextWriter

Der HtmlTextWriter, der den Ausgabestream enthält, der auf dem Client gerendert werden soll.

Ausnahmen

HttpException

HRef enthält eine fehlerhafte URL.

Beispiele

Im folgenden Codebeispiel wird veranschaulicht, wie sie die RenderAttributes Methode in einem benutzerdefinierten Serversteuerelement außer Kraft setzen, sodass für das Steuerelement immer bestimmte Titeltexte angezeigt werden, auf die HtmlAnchor als QuickInfo zugegriffen werden kann.

<%@ 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 HtmlAnchor - RenderAttributes - C# Example</title>
  </head>
  <body>
    <form id="Form1" method="post" runat="server">
      Top of Page
      <<aspSample:CustomHtmlAnchorRenderAttributes
           id="HtmlAnchor1"
           runat="server"
           name="HtmlAnchor1">HtmlAnchor1</aspSample:CustomHtmlAnchorRenderAttributes>>

      <h3>Custom HtmlAnchor - RenderAttributes - C# Example</h3>
      <p>Place the mouse pointer over the HtmlAnchor1 tag (above). A Title attribute was added from within the RenderAttributes override method.</p>
      <p>Jump to <a href="#HtmlAnchor2">HtmlAnchor2</a> below.</p>

      <p> </p><p> </p><p> </p><p> </p>
      <p> </p><p> </p><p> </p><p> </p>
      <p> </p><p> </p><p> </p><p> </p>
      <p> </p><p> </p><p> </p><p> </p>
      <p> </p><p> </p><p> </p><p> </p>
      <p> </p><p> </p><p> </p><p> </p>
      <p> </p><p> </p><p> </p><p> </p>
      <p> </p><p> </p><p> </p><p> </p>
      <p> </p><p> </p><p> </p><p> </p>
      <p> </p><p> </p><p> </p><p> </p>

      <p>Jump to <a href="#HtmlAnchor1">HtmlAnchor1</a> above.</p>
      <p> </p>Bottom of Page
      <<aspSample:CustomHtmlAnchorRenderAttributes
           id="HtmlAnchor2"
           runat="server"
           name="HtmlAnchor2">HtmlAnchor2</aspSample:CustomHtmlAnchorRenderAttributes>>
    </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 HtmlAnchor - RenderAttributes - Visual Basic Example</title>
  </head>
  <body>
    <form id="Form1" method="post" runat="server">
      Top of Page
      <<aspSample:CustomHtmlAnchorRenderAttributes
           id="HtmlAnchor1"
           runat="server"
           name="HtmlAnchor1">HtmlAnchor1</aspSample:CustomHtmlAnchorRenderAttributes>>

      <h3>Custom HtmlAnchor - RenderAttributes - Visual Basic Example</h3>
      <p>Place the mouse pointer over the HtmlAnchor1 tag (above). A Title attribute was added from within the RenderAttributes override method.</p>
      <p>Jump to <a href="#HtmlAnchor2">HtmlAnchor2</a> below.</p>

      <p> </p><p> </p><p> </p><p> </p>
      <p> </p><p> </p><p> </p><p> </p>
      <p> </p><p> </p><p> </p><p> </p>
      <p> </p><p> </p><p> </p><p> </p>
      <p> </p><p> </p><p> </p><p> </p>
      <p> </p><p> </p><p> </p><p> </p>
      <p> </p><p> </p><p> </p><p> </p>
      <p> </p><p> </p><p> </p><p> </p>
      <p> </p><p> </p><p> </p><p> </p>
      <p> </p><p> </p><p> </p><p> </p>

      <p>Jump to <a href="#HtmlAnchor1">HtmlAnchor1</a> above.</p>
      <p> </p>Bottom of Page
      <<aspSample:CustomHtmlAnchorRenderAttributes
           id="HtmlAnchor2"
           runat="server"
           name="HtmlAnchor2">HtmlAnchor2</aspSample:CustomHtmlAnchorRenderAttributes>>
    </form>
  </body>
</html>

using System.Web;
using System.Security.Permissions;
namespace Samples.AspNet.CS.Controls
{
    [AspNetHostingPermission(SecurityAction.Demand, Level = AspNetHostingPermissionLevel.Minimal)]
    public sealed class CustomHtmlAnchorRenderAttributes : System.Web.UI.HtmlControls.HtmlAnchor
    {
        protected override void RenderAttributes(System.Web.UI.HtmlTextWriter writer)
        {
            // Call the base class's RenderAttributes method.
            base.RenderAttributes(writer);
            
            // Write out the HtmlAnchor control's Title tag.
            writer.Write(" Title=\"Text from RenderAttributes.\"");
        }
    }
}

Imports System.Web
Imports System.Security.Permissions

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

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

            ' Call the base class's RenderAttributes method.
            MyBase.RenderAttributes(writer)

            ' Write out the HtmlAnchor control's Title tag.
            writer.Write(" Title=""Text from RenderAttributes.""")
        End Sub
    End Class
End Namespace

Hinweise

Wenn der Wert der HRef Eigenschaft eine falsch formatierte URL ist, löst die RenderAttributes Methode eine HttpException Ausnahme aus.

Gilt für

Siehe auch