Gets or sets the alternative caption the browser displays if an image is unavailable or currently downloading and not yet finished.
(in System.Web.dll)
Visual Basic (Declaration)
Public Property Alt As String
Dim instance As HtmlImage
Dim value As String
value = instance.Alt
instance.Alt = value
public string Alt { get; set; }
public:
property String^ Alt {
String^ get ();
void set (String^ value);
}
public function get Alt () : String
public function set Alt (value : String)
<asp:HtmlImage Alt="String" />
Property Value
Type:
System..::.StringA string that contains the alternative caption for the browser to use when the image is unavailable.
Use this property to specify the caption displayed when the image specified by the Src property is unavailable. On newer browsers, this caption also appears as a ToolTip.
The following code example demonstrates how to use the Alt property to specify the caption to display when the image specified by the Src property is unavailable.
<%@ 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 >
<head>
<title>HtmlImage Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>HtmlImage Example</h3>
<img id ="Image1"
src="Image1.jpg"
alt="Image 1"
runat="server"
style="width:500; height:226; border:5; text-align:center" />
</form>
</body>
</html>
<%@ 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 >
<head>
<title>HtmlImage Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>HtmlImage Example</h3>
<img id ="Image1"
src="Image1.jpg"
alt="Image 1"
runat="server"
style="width:500; height:226; border:5; text-align:center" />
</form>
</body>
</html>
<%@ Page Language="JScript" AutoEventWireup="True" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html >
<head>
<title>HtmlImage Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>HtmlImage Example</h3>
<img id ="Image1"
src="Image1.jpg"
alt="Image 1"
runat="server"
style="width:500; height:226; border:5; text-align:center" />
</form>
</body>
</html>
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
.NET Framework
Supported in: 3.5, 3.0, 2.0, 1.1, 1.0
Reference
Other Resources