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Button.AddAttributesToRender(HtmlTextWriter) Yöntem

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Tanım

Ad Alanı:
System.Web.UI.WebControls
Bütünleştirilmiş Kod:
System.Web.dll

denetimin Button özniteliklerini istemcide işlemek üzere çıkış akışına ekler.

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

Parametreler

writer
HtmlTextWriter

HtmlTextWriter İstemcide işlenmek üzere çıkış akışını içeren bir.

Örnekler

Aşağıdaki kod örneği, özel bir sunucu denetiminde yöntemin nasıl geçersiz kılındığını AddAttributesToRender gösterir; böylece Button metin her zaman kırmızı görüntülenir.

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

      <aspSample:CustomButtonAddAttributesToRender
        id="Button1"
        runat="server"
        Text="Button" />

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

<%@ Page language="VB" %>
<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.VB.Controls" Assembly="Samples.AspNet.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 Button - AddAttributesToRender - VB.NET Example</title>
  </head>
  <body>
    <form id="Form1" method="post" runat="server">
      <h3>Custom Button - AddAttributesToRender - VB.NET Example</h3>
      <aspSample:CustomButtonAddAttributesToRender id="Button1" runat="server" Text="Button" />
    </form>
  </body>
</html>

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

namespace Samples.AspNet.CS.Controls
{
    [AspNetHostingPermission(SecurityAction.Demand, Level = AspNetHostingPermissionLevel.Minimal)]
    public sealed class CustomButtonAddAttributesToRender : System.Web.UI.WebControls.Button
    {
    protected override void AddAttributesToRender(System.Web.UI.HtmlTextWriter writer) 
    {
      // Add a client-side onclick event to the button.
      writer.AddAttribute(System.Web.UI.HtmlTextWriterAttribute.Onclick, "alert('Hello World');");

      // Update the text of the button to be shown in the color Red
      writer.AddStyleAttribute(System.Web.UI.HtmlTextWriterStyle.Color, "Red");

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

Imports System.Web
Imports System.Security.Permissions

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

        Protected Overrides Sub AddAttributesToRender(ByVal writer As System.Web.UI.HtmlTextWriter)
            ' Add a client-side onclick event to the button.
            writer.AddAttribute(System.Web.UI.HtmlTextWriterAttribute.Onclick, "alert('Hello World');")

            ' Update the text of the button to be shown in the color Red
            writer.AddStyleAttribute(System.Web.UI.HtmlTextWriterStyle.Color, "Red")

            ' Call the base's AddAttributesToRender method
            MyBase.AddAttributesToRender(writer)
        End Sub
    End Class
End Namespace ' Samples.AspNet

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