<script language="vb" runat="server">
sub page_load(sender as object , e as eventargs)
myimg.imageurl="aa.gif"
myimg.alternatetext="测试图片" if not page.ispostback then
myselect.items.add("测试图片1")
myselect.items.add("测试图片2")
myselect.items.add("测试图片3")
end if
end subsub my_click(sender as object , e as eventargs)
dim myarray() as string={"aa.gif","bb.gif","cc.gif"}
myimg.imageurl=myarray(myselect.SelectedIndex)
end sub
</script><html>
<body>
<asp:image id="myimg" runat="server"/>
<form runat="server">
选择图片:<asp:dropdownlist runat="server" id="myselect" OnSelectedIndexChanged="my_click" AutoPostBack="true"/>
</form>
</body>
</html>
sub page_load(sender as object , e as eventargs)
myimg.imageurl="aa.gif"
myimg.alternatetext="测试图片" if not page.ispostback then
myselect.items.add("测试图片1")
myselect.items.add("测试图片2")
myselect.items.add("测试图片3")
end if
end subsub my_click(sender as object , e as eventargs)
dim myarray() as string={"aa.gif","bb.gif","cc.gif"}
myimg.imageurl=myarray(myselect.SelectedIndex)
end sub
</script><html>
<body>
<asp:image id="myimg" runat="server"/>
<form runat="server">
选择图片:<asp:dropdownlist runat="server" id="myselect" OnSelectedIndexChanged="my_click" AutoPostBack="true"/>
</form>
</body>
</html>
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" > <html>
<head>
<title>WebForm</title>
<meta name="CODE_LANGUAGE" Content="C#">
<meta name=vs_defaultClientScript content="JavaScript">
<meta name=vs_targetSchema content="http://schemas.microsoft.com/intellisense/ie5">
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<script runat="server" language="c#">
private void Page_Load(object sender, System.EventArgs e)
{
if( !IsPostBack )
{
myimg.ImageUrl = "aa.gif";
myimg.AlternateText = "测试图片";
myselect.Items.Clear();
myselect.Items.Add("测试图片1");
myselect.Items.Add("测试图片2");
myselect.Items.Add("测试图片3");
}
}void my_click(object sender,EventArgs e)
{
string[] myarray = {"aa.gif","bb.gif","cc.gif"};
myimg.ImageUrl = myarray[myselect.SelectedIndex];
myimg.AlternateText = myselect.SelectedItem.Text;
}override protected void OnInit(EventArgs e)
{
InitializeComponent();
base.OnInit(e);
}private void InitializeComponent()
{
this.Load += new System.EventHandler(this.Page_Load);
}</script>
</head>
<body>
<form id="Form1" method="post" runat="server">
<asp:image id="myimg" runat="server" />
选择图片:<asp:dropdownlist runat="server" id="myselect" OnSelectedIndexChanged="my_click" AutoPostBack="true" />
</form>
</body>
</html>