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Button.RenderContents(HtmlTextWriter) Metoda

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Definice

Obor názvů:
System.Web.UI.WebControls
Sestavení:
System.Web.dll

Vykreslí obsah ovládacího prvku určenému zapisovači.

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

Parametry

writer
HtmlTextWriter

Objekt HtmlTextWriter , který představuje výstupní datový proud pro vykreslení obsahu HTML v klientovi.

Příklady

Následující příklad kódu ukazuje, jak přepsat metodu RenderContents ve vlastním serverovém ovládacím prvku tak, aby vždy zobrazovala text za vlastním Button serverovým ovládacím prvku.

<%@ 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 Button - RenderContents - C# Example</title>
  </head>
  <body>
    <form id="Form1" method="post" runat="server">
      <h3>Custom Button - RenderContents - C# Example</h3>

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

    </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 Button - RenderContents - VB.NET Example</title>
  </head>
  <body>
    <form id="Form1" method="post" runat="server">
      <h3>Custom Button - RenderContents - VB.NET Example</h3>
      <aspSample:CustomButtonRenderContents 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 CustomButtonRenderContents : System.Web.UI.WebControls.Button
    {
    protected override void RenderContents(System.Web.UI.HtmlTextWriter writer)
    {
      // Call the base RenderContents method.
      base.RenderContents(writer);

      // Append some text after the button.
      writer.Write("<br>Click this button for more information.");
    }
  }
}

Imports System.Web
Imports System.Security.Permissions

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

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

            ' Append some text after the button.
            writer.Write("<br>Click this button for more information.")
        End Sub
    End Class
End Namespace

Platí pro

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