HtmlAnchor.OnPreRender(EventArgs) Método

Definição

Gera o evento PreRender e registra o script de cliente para gerar um postback.Raises the PreRender event and registers client script for generating a postback.

protected:
 override void OnPreRender(EventArgs ^ e);
protected public:
 override void OnPreRender(EventArgs ^ e);
protected override void OnPreRender (EventArgs e);
protected internal override void OnPreRender (EventArgs e);
override this.OnPreRender : EventArgs -> unit
Protected Overrides Sub OnPreRender (e As EventArgs)
Protected Friend Overrides Sub OnPreRender (e As EventArgs)

Parâmetros

e
EventArgs

Um EventArgs que contém os dados do evento.An EventArgs that contains the event data.

Exemplos

O exemplo de código a seguir demonstra como substituir o OnPreRender método para que ele sempre exiba uma Title marca em um HtmlAnchor controle de servidor personalizado.The following code example demonstrates how to override the OnPreRender method so that it always displays a Title tag in a custom HtmlAnchor server control.

<%@ 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 - OnPreRender - C# Example</title>
  </head>
  <body>
    <form id="Form1" method="post" runat="server">
      Top of Page
      &lt;<aspSample:CustomHtmlAnchorOnPreRender
           id="HtmlAnchor1"
           runat="server"
           name="HtmlAnchor1">HtmlAnchor1</aspSample:CustomHtmlAnchorOnPreRender>&gt;

      <h3>Custom HtmlAnchor - OnPreRender - C# Example</h3>
      <p>&nbsp;</p>
      <p>Jump to <a href="#HtmlAnchor2">HtmlAnchor2</a> below.</p>

      <p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p>
      <p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p>
      <p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p>
      <p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p>
      <p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p>
      <p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p>
      <p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p>
      <p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p>
      <p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p>
      <p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p>

      <p>Jump to <a href="#HtmlAnchor1">HtmlAnchor1</a> above.</p>
      <p>&nbsp;</p>Bottom of Page
      &lt;<aspSample:CustomHtmlAnchorOnPreRender
           id="HtmlAnchor2"
           runat="server"
           name="HtmlAnchor2">HtmlAnchor2</aspSample:CustomHtmlAnchorOnPreRender>&gt;
    </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 - OnPreRender - Visual Basic Example</title>
  </head>
  <body>
    <form id="Form1" method="post" runat="server">
      Top of Page
      &lt;<aspSample:CustomHtmlAnchorOnPreRender
           id="HtmlAnchor1"
           runat="server"
           name="HtmlAnchor1">HtmlAnchor1</aspSample:CustomHtmlAnchorOnPreRender>&gt;

      <h3>Custom HtmlAnchor - OnPreRender - Visual Basic Example</h3>
      <p>&nbsp;</p>
      <p>Jump to <a href="#HtmlAnchor2">HtmlAnchor2</a> below.</p>

      <p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p>
      <p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p>
      <p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p>
      <p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p>
      <p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p>
      <p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p>
      <p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p>
      <p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p>
      <p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p>
      <p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p>

      <p>Jump to <a href="#HtmlAnchor1">HtmlAnchor1</a> above.</p>
      <p>&nbsp;</p>Bottom of Page
      &lt;<aspSample:CustomHtmlAnchorOnPreRender
           id="HtmlAnchor2"
           runat="server"
           name="HtmlAnchor2">HtmlAnchor2</aspSample:CustomHtmlAnchorOnPreRender>&gt;
    </form>
  </body>
</html>
using System.Web;
using System.Security.Permissions;

namespace Samples.AspNet.CS.Controls
{
    [AspNetHostingPermission(SecurityAction.Demand, Level = AspNetHostingPermissionLevel.Minimal)]
    public sealed class CustomHtmlAnchorOnPreRender : System.Web.UI.HtmlControls.HtmlAnchor
    {
        protected override void OnPreRender(System.EventArgs e)
        {
            // Call the base OnPreRender method.
            base.OnPreRender(e);

            // Write out the HtmlAnchor control's Title tag.
            this.Title = "Text from OnPreRender.";
        }
    }
}
Imports System.Web
Imports System.Security.Permissions

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

        Protected Overrides Sub OnPreRender(ByVal e As System.EventArgs)

            ' Call the base OnPreRender method.
            MyBase.OnPreRender(e)

            ' Write out the HtmlAnchor control's Title tag.
            Me.Title = "Text from OnPreRender."
        End Sub
    End Class
End Namespace

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