如何在button提交了之后页面刷新了还保存select里面的值？用session和cookie保存的就算了···
------解决方案--------------------------------------------------------
首先，你是使用的DropDownList还是html的select?DropDownList本身就有这样的功能
如果是html的select，你可以
<%@ Page Language="C#" EnableViewState="true" AutoEventWireup="true" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
protected void Button1_Click(object sender, EventArgs e)
{
String s = Request.Params.Get("S1");
Page.ClientScript.RegisterStartupScript(Page.GetType(), "js", "myfunction('" + s + "')", true);
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title></title>
<script type="text/javascript">
function myfunction(item) {
s = document.getElementById("S1")
for (i = 0; i < s.options.length; i++) {
if (s.options[i].value == item) s.options[i].selected = true;
}
}
</script>
</head>
<body>
<form runat="server">
<select name="S1" id="S1">
<option value="1">1</option>
<option value="2">3</option>
<option value="3">3</option>
</select>
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" />
</form>
</body>
</html>