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TableCell.RenderContents(HtmlTextWriter) Método

  • Referencia

Definición

Espacio de nombres:
System.Web.UI.WebControls
Ensamblado:
System.Web.dll

Representa el contenido de TableCell en el objeto HtmlTextWriter especificado.

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)

Parámetros

writer
HtmlTextWriter

Flujo de salida que representa el contenido HTML en el cliente.

Ejemplos

En el ejemplo de código siguiente se muestra cómo invalidar el RenderContents método en un control personalizado TableCell para que se inserte texto personalizado en el contenido de la celda.

<%@ 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 id="Head2" runat="server">
    <title>Custom TableCell - RenderContents - C# Example</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>

    <h3>Custom TableCell - RenderContents - C# Example</h3>

    <asp:Table id="Table1" runat="server" CellPadding="3" CellSpacing="2">
      <asp:TableRow>
        <aspSample:CustomTableCellRenderContents Text="(0,0)" />
        <aspSample:CustomTableCellRenderContents Text="(0,1)" />
        <aspSample:CustomTableCellRenderContents Text="(0,2)" />
      </asp:TableRow>
      <asp:TableRow>
        <aspSample:CustomTableCellRenderContents Text="(1,0)" />
        <aspSample:CustomTableCellRenderContents Text="(1,1)" />
        <aspSample:CustomTableCellRenderContents Text="(1,2)" />
      </asp:TableRow>
    </asp:Table>

    </div>
    </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 id="Head2" runat="server">
    <title>Custom TableCell - RenderContents - VB.NET Example</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>

    <h3>Custom TableCell - RenderContents - VB.NET Example</h3>

    <asp:Table id="Table1" runat="server" CellPadding="3" CellSpacing="2">
      <asp:TableRow>
        <aspSample:CustomTableCellRenderContents Text="(0,0)" />
        <aspSample:CustomTableCellRenderContents Text="(0,1)" />
        <aspSample:CustomTableCellRenderContents Text="(0,2)" />
      </asp:TableRow>
      <asp:TableRow>
        <aspSample:CustomTableCellRenderContents Text="(1,0)" />
        <aspSample:CustomTableCellRenderContents Text="(1,1)" />
        <aspSample:CustomTableCellRenderContents Text="(1,2)" />
      </asp:TableRow>
    </asp:Table>

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

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

namespace Samples.AspNet.CS.Controls
{
  [AspNetHostingPermission(SecurityAction.Demand, Level=AspNetHostingPermissionLevel.Minimal)]
  public sealed class CustomTableCellRenderContents : System.Web.UI.WebControls.TableCell
  {
    protected override void RenderContents(System.Web.UI.HtmlTextWriter writer)
    {
      // Insert text into each TableCell.
      writer.Write("TableCell: ");

      // Call the base RenderContents method.
      base.RenderContents(writer);
    }
  }
}

Imports System.Web
Imports System.Security.Permissions

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

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

            ' Insert text into each TableCell.
            writer.Write("TableCell: ")

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

        End Sub

    End Class

End Namespace

Comentarios

Si el TableCell control tiene controles secundarios o se invalida en una clase derivada, se llama al método de RenderContents la clase base; de lo contrario, el valor de la Text propiedad se escribe en el HtmlTextWriter objeto .

El RenderContents método se usa principalmente por los desarrolladores de controles que amplían la funcionalidad del TableCell control.

Se aplica a

Consulte también