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Image.AddAttributesToRender Method

This API supports the .NET Framework infrastructure and is not intended to be used directly from your code.

Adds the attributes of an Image to the output stream for rendering on the client.

Namespace:  System.Web.UI.WebControls
Assembly:  System.Web (in System.Web.dll)

'Declaration
Protected Overrides Sub AddAttributesToRender ( _
	writer As HtmlTextWriter _
)

Parameters

writer
Type: System.Web.UI.HtmlTextWriter

A System.Web.UI.HtmlTextWriter that contains the output stream to render on the client browser.

The following code example demonstrates how to override the AddAttributesToRender method in a custom server control so that the Image always displays with a thin border.

<%@ 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 Image - AddAttributesToRender - VB.NET Example</title>
    </head>
    <body>
        <form id="Form1" method="post" runat="server">
            <h3>Custom Image - AddAttributesToRender - VB.NET Example</h3>

            <aspSample:CustomImageAddAttributesToRender id="Image1" runat="server" 
             ImageUrl="http://www.microsoft.com/homepage/gif/bnr-microsoft.gif" 
             AlternateText="Microsoft Home" />

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


...


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

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

        ' Show the Image with a thin border.
        writer.AddStyleAttribute("border-width", "thin")

        ' Call the Base's AddAttributesToRender method. 
        MyBase.AddAttributesToRender(writer)
    End Sub 
End Class

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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