HtmlImage.Alt 属性
定义
获取或设置在图像不可用或当前正在下载且尚未完成的情况下浏览器显示的替换标题。Gets or sets the alternative caption the browser displays if an image is unavailable or currently downloading and not yet finished.
public:
property System::String ^ Alt { System::String ^ get(); void set(System::String ^ value); };
public string Alt { get; set; }
member this.Alt : string with get, set
Public Property Alt As String
属性值
字符串,它包含图像不可用时浏览器所使用的替换标题。A string that contains the alternative caption for the browser to use when the image is unavailable.
示例
下面的代码示例演示如何使用 Alt 属性指定在属性指定的图像不可用时要显示的标题 Src 。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="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>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="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>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>
注解
使用此属性可指定在属性指定的图像不可用时显示的标题 Src 。Use this property to specify the caption displayed when the image specified by the Src property is unavailable. 在较新的浏览器中,此标题还显示为工具提示。On newer browsers, this caption also appears as a ToolTip.