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Literal.Render(HtmlTextWriter) Método

  • Referência

Definição

Namespace:
System.Web.UI.WebControls
Assembly:
System.Web.dll

Envia o conteúdo do controle de servidor a um objeto HtmlTextWriter fornecido, que grava o conteúdo a ser renderizado no cliente.

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

Parâmetros

outputwriter
HtmlTextWriter

O objeto HtmlTextWriter que recebe o conteúdo do controle do servidor.

Exemplos

O exemplo de código a seguir demonstra como substituir o Render método em um controle de servidor personalizado para que o texto específico sempre seja exibido antes do Literal.

<%@ 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 LiteralControl - Render - C# Example</title>
       <script runat="server">
      void Button1_Click(Object sender, EventArgs e)
      {
         Literal1.Text = "Welcome to ASP.NET!";
      }
   </script>
    </head>
    <body>
        <form id="Form1" method="post" runat="server">
            <h3>Custom LiteralControl - Render - C# Example</h3>
            
            <aspSample:CustomLiteralRender id="Literal1" 
              runat="server" />

      <br /><br />

      <asp:Button id="Button1"
        Text="Change"
        OnClick="Button1_Click"
        runat="server"/>
        </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 LiteralControl - Render - VB.Net Example</title>
       <script runat="server">
      Sub Button1_Click(sender As Object, e As EventArgs)
      
         Literal1.Text = "Welcome to ASP.NET!"

      End Sub
   </script>
    </head>
    <body>
        <form id="Form1" method="post" runat="server">
            <h3>Custom LiteralControl - Render - VB.Net Example</h3>
            
            <aspSample:CustomLiteralRender id="Literal1" 
              runat="server" />

      <br /><br />

      <asp:Button id="Button1"
        Text="Change"
        OnClick="Button1_Click"
        runat="server"/>
        </form>
    </body>
</html>

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

namespace Samples.AspNet.CS.Controls
{
  [AspNetHostingPermission(SecurityAction.Demand, Level=AspNetHostingPermissionLevel.Minimal)]
  public sealed class CustomLiteralRender : System.Web.UI.LiteralControl
  {
    protected override void Render(System.Web.UI.HtmlTextWriter writer)
    {
      // Write out some literal text.
      writer.Write("Literal Text: ");
      
      // Call the base Render method.
      base.Render(writer);
    }
  }
}

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

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

        ' Write out some literal text.
        writer.Write("Literal Text: ")

        ' Call the base Render method.
        MyBase.Render(writer)
    End Sub
End Class

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