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HtmlInputButton.RenderAttributes-Methode

Rendert die Attribute in den angegebenen Writer und ruft dann die RenderAttributes-Methode auf.

Namespace: System.Web.UI.HtmlControls
Assembly: System.Web (in system.web.dll)

Syntax

'Declaration
Protected Overrides Sub RenderAttributes ( _
    writer As HtmlTextWriter _
)
'Usage
Dim writer As HtmlTextWriter

Me.RenderAttributes(writer)

protected override void RenderAttributes (
    HtmlTextWriter writer
)

protected:
virtual void RenderAttributes (
    HtmlTextWriter^ writer
) override

protected void RenderAttributes (
    HtmlTextWriter writer
)

protected override function RenderAttributes (
    writer : HtmlTextWriter
)

Parameter

Hinweise

Die RenderAttributes-Methode überschreibt die HtmlControl.RenderAttributes-Basismethode. RenderAttributes wird hauptsächlich von Steuerelemententwicklern verwendet.

Beispiel

Im folgenden Codebeispiel wird das Überschreiben der OnPreRender-Methode in einem benutzerdefinierten Serversteuerelement veranschaulicht, sodass im HtmlInputButton immer ein bestimmter Titel angezeigt wird, der auch als QuickInfo verfügbar ist.

<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.VB.Controls" Assembly="Samples.AspNet.VB" %>
<%@ Page Language="VB" AutoEventWireup="True" %>
<HTML>
  <HEAD>
    <title>Custom HtmlInputButton - RenderAttributes - Visual Basic Example</title>
    <script runat="server">
      Sub Page_Load(sender As Object, e As EventArgs)
        HtmlInputButton1.Attributes.Add("onclick", "alert('Hello client-side world.');")
      End Sub

      Sub HtmlInputButton1_ServerClick(sender As Object, e As EventArgs)
        Div1.InnerHtml = "Hello server-side world."
      End Sub
    </script>
  </HEAD>
  <body>
    <form id="Form1" method="post" runat="server">
      <h3>Custom HtmlInputButton - RenderAttributes - Visual Basic Example</h3>

      <aspSample:CustomHtmlInputButtonRenderAttributes
        id="HtmlInputButton1"
        runat="server"
        type="button"
        onserverclick="HtmlInputButton1_ServerClick"
        value="Html Input Button"
        name="HtmlInputButton1">&nbsp;&nbsp;

      <DIV id="Div1" runat="server"
        style="DISPLAY: inline; WIDTH: 256px; HEIGHT: 15px"
        ms_positioning="FlowLayout" />
    </form>
  </body>
</HTML>

<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.CS.Controls" Assembly="Samples.AspNet.CS" %>
<%@ Page Language="C#" AutoEventWireup="True" %>
<HTML>
  <HEAD>
    <title>Custom HtmlInputButton - RenderAttributes - C# Example</title>
    <script runat="server">
      void Page_Load(Object sender, EventArgs e)
      {
        HtmlInputButton1.Attributes.Add("onclick","alert('Hello client-side world.');");
      }

      void HtmlInputButton1_ServerClick(Object sender, EventArgs e)
      {
        Div1.InnerHtml = "Hello server-side world.";
      }
    </script>
  </HEAD>
  <body>
    <form id="Form1" method="post" runat="server">
      <h3>Custom HtmlInputButton - RenderAttributes - C# Example</h3>

      <aspSample:CustomHtmlInputButtonRenderAttributes
        id="HtmlInputButton1"
        runat="server"
        type="button"
        onserverclick="HtmlInputButton1_ServerClick"
        value="Html Input Button"
        name="HtmlInputButton1">&nbsp;&nbsp;

      <DIV id="Div1" runat="server"
        style="DISPLAY: inline; WIDTH: 256px; HEIGHT: 15px"
        ms_positioning="FlowLayout" />
    </form>
  </body>
</HTML>

<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.JSL.Controls" Assembly="Samples.AspNet.JSl" %>
<%@ Page Language="VJ#" AutoEventWireup="True" %>
<HTML>
  <HEAD>
    <title>Custom HtmlInputButton - RenderAttributes - VJ# Example</title>
    <script runat="server">
    void Page_Load(Object sender, EventArgs e)
    {
        HtmlInputButton1.get_Attributes().Add("onclick",
            "alert('Hello client-side world.');");
    } //Page_Load

    void HtmlInputButton1_ServerClick(Object sender, EventArgs e)
    {
        Div1.set_InnerHtml("Hello server-side world.");
    } //HtmlInputButton1_ServerClick
    </script>
  </HEAD>
  <body>
    <form id="Form1" method="post" runat="server">
      <h3>Custom HtmlInputButton - RenderAttributes - VJ# Example</h3>

      <aspSample:CustomHtmlInputButtonRenderAttributes
        id="HtmlInputButton1"
        runat="server"
        type="button"
        onserverclick="HtmlInputButton1_ServerClick"
        value="Html Input Button"
        name="HtmlInputButton1">&nbsp;&nbsp;

      <DIV id="Div1" runat="server"
        style="DISPLAY: inline; WIDTH: 256px; HEIGHT: 15px"
        ms_positioning="FlowLayout" />
    </form>
  </body>
</HTML>

Imports System.Web
Imports System.Security.Permissions

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

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

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

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

End Namespace

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

namespace Samples.AspNet.CS.Controls
{
    [AspNetHostingPermission(SecurityAction.Demand, Level = AspNetHostingPermissionLevel.Minimal)]
    public sealed class CustomHtmlInputButtonRenderAttributes : System.Web.UI.HtmlControls.HtmlInputButton
    {
        protected override void RenderAttributes(System.Web.UI.HtmlTextWriter writer)
        {

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

            // Write out the HtmlInputButton control's Title tag.
            writer.Write(" Title=\"Text from RenderAttributes.\"");
            
        }
    }
}

package Samples.AspNet.JSL.Controls;

public class CustomHtmlInputButtonRenderAttributes
    extends System.Web.UI.HtmlControls.HtmlInputButton
{
    protected void RenderAttributes(System.Web.UI.HtmlTextWriter writer)
    {
        // Write out Title tag
        writer.Write(" Title=\"Text from RenderAttributes.\"");
        // Call the base's RenderAttributes method.
        super.RenderAttributes(writer);
    } //RenderAttributes
} //CustomHtmlInputButtonRenderAttributes

Plattformen

Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.

Versionsinformationen

.NET Framework

Unterstützt in: 2.0, 1.1, 1.0

Siehe auch

Referenz

HtmlInputButton-Klasse
HtmlInputButton-Member
System.Web.UI.HtmlControls-Namespace

Weitere Ressourcen

HTML-Serversteuerelemente

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