Alt Property
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HtmlInputImage.Alt Property

 

Gets or sets the alternative text that the browser displays if the image is unavailable or has not been downloaded.

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

public string Alt { get; set; }

Property Value

Type: System.String

The alternative text for the specified image. The default value is an empty string ("").

Use the Alt property to specify the text to display when the specified image is not available or has not been downloaded. You can also use this property to programmatically determine the specified alternative text.

In browsers that support the ToolTip feature, this text also appears as a ToolTip for the HtmlInputImage control.

The following code example demonstrates how to use the Alt property to specify the alternate text to display when the image is not available.

<%@ 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" >
   <script runat="server">

     protected void SubmitBtn_Click(object sender, ImageClickEventArgs e)
     {
       Message.InnerHtml = "The Submit button was clicked.";
     }

     protected void ClearBtn_Click(object sender, ImageClickEventArgs e)
     {
       Message.InnerHtml = "The Clear button was clicked.";
     }

</script>

   <head runat="server">
    <title>HtmlInputImage Example</title>
</head>
<body>
      <h3>HtmlInputImage Example</h3>

      <form id="form1" runat="server">

         <input type="image"
                alt="Submit button" 
                src="Submit.jpg" 
                onserverclick="SubmitBtn_Click" 
                runat="server"
                id="Image1" />

         <input type="image"
                alt="Clear button" 
                src="Clear.jpg" 
                onserverclick="ClearBtn_Click" 
                runat="server"
                id="Image2" />

         <h1> 

         <span id="Message" 
               runat="server">
         </span>

         </h1>

      </form>

   </body>

</html>

.NET Framework
Available since 1.1
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