Xml.Render(HtmlTextWriter) Method (System.Web.UI.WebControls)

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Definition






Renders the results to the output stream.

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

Parameters

Examples

The following code example demonstrates how to override the Render method in a custom server control so that the Xml control is always displayed with an image.

<%@ 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 Xml - Render - C# Example</title>
    </head>
    <body>
        <form id="Form1" method="post" runat="server">
            <h3>Custom Xml - Render - C# Example</h3>
            
            <aspSample:CustomXmlRender 
              id="xml1" 
              runat="server" 
              DocumentSource="People.xml" 
              TransformSource="PeopleTable.xslt" />
              
        </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 Xml - Render - VB.NET Example</title>
    </head>
    <body>
        <form id="Form1" method="post" runat="server">
            <h3>Custom Xml - Render - VB.NET Example</h3>
            
            <aspSample:CustomXmlRender id="xml1" runat="server" 
             DocumentSource="People.xml" TransformSource="PeopleTable.xslt" />
        </form>
    </body>
</html>
using System.Web;
using System.Security.Permissions;

namespace Samples.AspNet.CS.Controls

  [AspNetHostingPermission(SecurityAction.Demand, Level=AspNetHostingPermissionLevel.Minimal)]
  public sealed class CustomXmlRender : System.Web.UI.WebControls.Xml
  
    protected override void Render(System.Web.UI.HtmlTextWriter writer)
    
      // Create and render a new Image web control.
      System.Web.UI.WebControls.Image image = new System.Web.UI.WebControls.Image();
      image.ID = "Image1";
      image.ImageUrl = "image.jpg";	
      image.AlternateText = "Image for XML.";
      image.RenderControl(writer);

      // Call the base class's Render method.
      base.Render(writer);
    
  

Imports System.Web
Imports System.Security.Permissions

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

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

            ' Create and render a new Image web control.
            Dim image As New System.Web.UI.WebControls.Image
            image.ID = "Image1"
            image.ImageUrl = "image.jpg"
            image.AlternateText = "Image for XML."
            image.RenderControl(writer)

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

Applies to

See Also




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source_link
https://www.asp.net