1.<asp:Button ID="btnSumbit" runat="server" UseSubmitBehavior="false" OnClientClick="this.value='Sumbit';this.disabled=true; " Text="Sumbit" OnClick="btnSumbit_Click" />
2.對“添加”、“提交”、“儲存”、“更新”等按鈕需要對資料庫進行寫操作的按鈕，一定要在頁面初始化時載入指令碼，防止多次重複點擊，例如：
protected void Page_Load(object sender, EventArgs e)
{
//.net1.1
Button1.Attributes.Add("onclick", "this.disabled=true;" + this.GetPostBackEventReference(this.Button1));
//.net 2.0以上
Button1.Attributes.Add("onclick", "this.disabled=true;" + this.ClientScript.GetPostBackEventReference(Button1, ""));
}
為了測試，我們可以建立一個頁面，加入一個btnAdd按鈕
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="AddAndEditUser.aspx.cs" Inherits="AddUser" %><html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>添加和編輯頁面樣本</title>
</head>
<body>
<form id="frmMain" runat="server">
<asp:Button ID="btnAdd" runat="server" CssClass="INPUT-BUTTON-Save" OnClick="btnAdd_Click">
</asp:Button>
</form>
</body>
</html>
using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
public partial class AddUser : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
btnAdd.Attributes.Add("onclick", "this.disabled=true;" + this.ClientScript.GetPostBackEventReference(btnAdd, ""));
}
protected void btnAdd_Click(object sender, EventArgs e)
{
//延遲5秒鐘
System.Threading.Thread.Sleep(5000);
}
}
當點擊了按鈕，需要等5秒鐘按鈕才能點擊。即頁面回傳一後按鈕才能用。這樣可以有效防止使用者多次點擊按鈕，造成多次提交！
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