CheckBox.OnPreRender(EventArgs) Methode

Referenz

Definition

Namespace:: System.Web.UI.WebControls

Assembly:: System.Web.dll

Wichtig

Einige Informationen beziehen sich auf Vorabversionen, die vor dem Release ggf. grundlegend überarbeitet werden. Microsoft übernimmt hinsichtlich der hier bereitgestellten Informationen keine Gewährleistungen, seien sie ausdrücklich oder konkludent.

Registriert ein Clientskript für das Generieren des Postbacks vor dem Rendering auf dem Client, wenn AutoPostBack gleich true ist.

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)

Parameter

e: EventArgs

Ein EventArgs, das die Ereignisdaten enthält.

Beispiele

<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.CS.Controls" Assembly="Samples.AspNet.CS" %>
<%@ Page language="c#" %>
<!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 CheckBox - OnPreRender - C# Example</title>
  </head>
  <body>
    <form id="Form1" method="post" runat="server">
      <h3>Custom CheckBox - OnPreRender - C# Example</h3>

      <aspSample:CustomCheckBoxOnPreRender
        id="CheckBox1"
        runat="server"
        text="CheckBox1" />

    </form>
  </body>
</html>

<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.VB.Controls" Assembly="Samples.AspNet.VB" %>
<%@ Page language="VB" %>
<!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 CheckBox - OnPreRender - VB.NET Example</title>
  </head>
  <body>
    <form id="Form1" method="post" runat="server">
      <h3>Custom CheckBox - OnPreRender - VB.NET Example</h3>
      <aspSample:CustomCheckBoxOnPreRender id="CheckBox1" runat="server" text="CheckBox1" />
    </form>
  </body>
</html>

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

namespace Samples.AspNet.CS.Controls
{
    [AspNetHostingPermission(SecurityAction.Demand, Level = AspNetHostingPermissionLevel.Minimal)]
    public class CustomCheckBoxOnPreRender : System.Web.UI.WebControls.CheckBox
    {
        protected override void OnPreRender(System.EventArgs e)
        {
        // Run the OnPreRender method on the base class.
        base.OnPreRender(e);

        // Display a LightGray BackColor for the CheckBox.
        this.BackColor = System.Drawing.Color.LightGray;
        }
    }
}

Imports System.Web
Imports System.Security.Permissions

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

        Protected Overrides Sub OnPreRender(ByVal e As System.EventArgs)
            ' Run the OnPreRender method on the base class.
            MyBase.OnPreRender(e)

            ' Display a LightGray BackColor for the CheckBox.
            Me.BackColor = System.Drawing.Color.LightGray
        End Sub
    End Class
End Namespace

Gilt für

Siehe auch

CheckBox- und CheckBoxList-Webserversteuerelemente

Freigeben über