网上查了很多方法，都不太好使，不如自己写一个，思路就是把按钮按下时用Javascript在客户端把按钮下一次的onclick事件改为return false; 这样在服务器端页面重新送回客户端之前，再次点击按钮都不会Post到服务端。同时将按钮的style改为一行字的样子，光标也变成沙漏状。当服务端页面重新产生后Button又会回到初始状态。该方法对于F5刷新还不能防范，为了防止刷新时再次提交可以在页面返回前将一些TextBox控件清空，这样就可以判断如果该TextBox为空则不再进行后续操作（如写库）。
1
<head runat="server">
2 <title>禁止多次提交网页测试</title>
3
<style type="text/css">
4
.disable
5
{
6 border-style:none;
7 border-width: thin;
8 background-color:Transparent;
9 color: #CCCCCC;
10 cursor:wait;
11
}
12
</style>
13 <script type="text/javascript" language="javascript">
14 function DisableButton()
15 {
16 document.getElementById("Button2").className = "disable";
17 document.getElementById("Button2").value = '正在提交
.';
18 document.getElementById("Button2").onclick=Function("return false;");
19 return true;
20 }
21 </script>
22</head>
23<body>
24 <form id="form1" runat="server">
25 <div>
26 输入一些内容<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
27 <br />
28 <asp:ListBox ID="ListBox1" runat="server" Height="77px" Width="332px">
29 </asp:ListBox><br />
30 <asp:Button ID="Button2" runat="server" Text="OK" Width="77px"
31 onclick="Button2_Click" />
32 </div>
33
34 </form>
35</body>
36</html>
<head runat="server">2
<title>禁止多次提交网页测试</title>3
<style type="text/css">
4
.disable5
{
6
border-style:none; 7
border-width: thin; 8
background-color:Transparent; 9
color: #CCCCCC; 10
cursor:wait;11
}12
</style>13
<script type="text/javascript" language="javascript">14
function DisableButton()15
{16
document.getElementById("Button2").className = "disable";17
document.getElementById("Button2").value = '正在提交.';18
document.getElementById("Button2").onclick=Function("return false;");19
return true;20
}21
</script>22
</head>23
<body>24
<form id="form1" runat="server">25
<div>26
输入一些内容<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>27
<br />28
<asp:ListBox ID="ListBox1" runat="server" Height="77px" Width="332px">29
</asp:ListBox><br />30
<asp:Button ID="Button2" runat="server" Text="OK" Width="77px"31
onclick="Button2_Click" />32
</div>33
34
</form>35
</body>36
</html>
服务器端代码,故意让其延时等待3秒后再输入，以模拟数据库操作等慢速动作。
1public partial class Default2 : System.Web.UI.Page
2{
3 static public int count = 0;
4 protected void Page_Load(object sender, EventArgs e)
5 {
6 if (!IsPostBack)
7 {
8 Button2.Attributes.Add("onclick", "return DisableButton();");
9 }
10 }
11
12 protected void Button2_Click(object sender, EventArgs e)
13 {
14 if (TextBox1.Text != string.Empty)
15 {
16 System.Threading.Thread.Sleep(3000);
17 count++;
18 ListBox1.Items.Add(new ListItem("Hello "+TextBox1.Text + " 这是你第" + count.ToString() + "次点击 " + DateTime.Now.ToString()));
19 TextBox1.Text = "";
20 }
21 }
22}
public partial class Default2 : System.Web.UI.Page2
{3
static public int count = 0;4
protected void Page_Load(object sender, EventArgs e)5
{6
if (!IsPostBack)7
{8
Button2.Attributes.Add("onclick", "return DisableButton();");9
}10
}11
12
protected void Button2_Click(object sender, EventArgs e)13
{14
if (TextBox1.Text != string.Empty)15
{16
System.Threading.Thread.Sleep(3000);17
count++;18
ListBox1.Items.Add(new ListItem("Hello "+TextBox1.Text + " 这是你第" + count.ToString() + "次点击 " + DateTime.Now.ToString()));19
TextBox1.Text = "";20
}21
}22
}