Label.RenderContents(HtmlTextWriter) Metodo

  • Riferimento

Definizione

Spazio dei nomi:
System.Web.UI.WebControls
Assembly:
System.Web.dll

Esegue il rendering del contenuto del controllo Label nel writer specificato.

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)

Parametri

writer
HtmlTextWriter

Flusso di output che esegue il rendering del contenuto HTML nel client.

Esempio

Nell'esempio di codice seguente viene illustrato come eseguire l'override del RenderContents metodo in un controllo server personalizzato in modo che un testo venga accodato a Label.

<%@ 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 Label - RenderContents - C# Example</title>
    </head>
    <body>
        <form id="Form1" method="post" runat="server">
            <h3>Custom Label - RenderContents - C# Example</h3>
            
            <aspSample:CustomLabelRenderContents 
              id="Label1" 
              runat="server" 
              ToolTip="Microsoft Corp.">Microsoft Corp.
            </aspSample:CustomLabelRenderContents>

        </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 Label - RenderContents - VB.NET Example</title>
    </head>
    <body>
        <form id="Form1" method="post" runat="server">
            <h3>Custom Label - RenderContents - VB.NET Example</h3>
            
            <aspSample:CustomLabelRenderContents id="Label1" runat="server" 
             ToolTip="Microsoft Corp.">Microsoft Corp.</aspSample:CustomLabelRenderContents>

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

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

namespace Samples.AspNet.CS.Controls
{
  [AspNetHostingPermission(SecurityAction.Demand, Level=AspNetHostingPermissionLevel.Minimal)]
  public sealed class CustomLabelRenderContents : System.Web.UI.WebControls.Label
  {
    protected override void RenderContents(System.Web.UI.HtmlTextWriter writer)
    {
      // Call the base RenderContents method.
      base.RenderContents(writer);

      // Append some text to the Label.
      writer.Write("<BR>Experience Windows Server 2003 and Visual Studio® .NET 2003.");
    }
  }
}

<AspNetHostingPermission(SecurityAction.Demand, Level:=AspNetHostingPermissionLevel.Minimal)> _
Public NotInheritable Class CustomLabelRenderContents
    Inherits System.Web.UI.WebControls.Label

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

        ' Call the base RenderContents method.
        MyBase.RenderContents(writer)

        ' Append some text to the Label.
        writer.Write("<BR>Experience Windows Server 2003 and Visual Studio .NET 2003.")
    End Sub
End Class

Si applica a