asp.net防止按钮被多次提交的几种办法

在提交表单时，如果网页速度过慢或者其他原因，用户多次提交能导致数据的修改，本文罗列了在.net环境下怎样避免重复提交放生的方法。

这段是放在&nbspPage_Load&nbsp中&nbsp

if(!Page.IsPostBack) 
{ 
System.Text.StringBuilder s = new System.Text.StringBuilder(); 
s.Append("a();"); 
s.Append(this.GetPostBackEventReference(this.Button1)); 
this.Button1.Attributes.Add("onclick",s.ToString()); 
} 
a() 是 JS 
function a() 
{ 
var ok=document.getElementById('Button1'); 
ok.disabled = true; 
return true; 
} 

浓缩后即为：&nbsp

btnSave.Attributes.Add("onclick","this.disabled='true';"+GetPostBackEventReference(btnSave)); 

一个问题稍微困扰了一下，后来解决了，btnSave.Attributes.Add(“onclick”,”a();”+GetPostBackEventReference(btnSave));&nbsp如果a()这个函数还包含其他验证，比如说一些正则验证等，btnSave.Attributes.Add(“onclick”,”return&nbspa();”+GetPostBackEventReference(btnSave));&nbsp则不能进行。可以将JS代码全部在CS文件中写就OK拉。&nbsp

System.Text.StringBuilder s = new System.Text.StringBuilder(); s.Append("var ok=document.getElementById('Button1'); "); 
s.Append("ok.disabled = true; "); 
s.Append(this.GetPostBackEventReference(this.Button1)); 
this.Button1.Attributes.Add("onclick",s.ToString()); 
//.net 2.0以上 
Button1.Attributes.Add("onclick", "this.disabled=true;" + this.ClientScript.GetPostBackEventReference(Button1, "")); 

或：&nbsp

<asp:Button ID="btnSumbit" runat="server" UseSubmitBehavior="false" OnClientClick="this.value='Sumbit';this.disabled=true; " Text="Sumbit" OnClick="btnSumbit_Click" /> 

其他的方法(可供尝试)&nbsp
方法一：&nbsp

protected void Page_Load(object sender, EventArgs e) 
{ 
btn.Attributes.Add("onclick", "state=true;"); 
StringBuilder sb = new StringBuilder(); 
sb.Append("if (!state) return;"); 
sb.Append("var button=document.getElementByIdx_x('btn');"); 
sb.Append("button.value='Please Wait...';"); 
sb.Append("document.body.style.cursor='wait';"); 
sb.Append("button.disabled=true;"); 
string strScript = "<script>"; 
strScript = strScript + "var state=false;"; 
//将函数绑定到页面的onbeforeunload事件: 
strScript = strScript + "window.attachEvent('onbeforeunload',function(){" + sb.ToString() + "});"; 
strScript = strScript + "</" + "script>"; 
Page.RegisterStartupScript("onbeforeunload", strScript); 
} 
protected void Submit_Click(object sender, EventArgs e) 
{ 
//模拟长时间的按钮处理 
System.Threading.Thread.Sleep(2000); 
Response.Write("<script>alert('bbbbbb!!');" + "</" + "script>"); 
} 
<asp:Button ID="btn" Text="Submit" OnClick="Submit_Click" 
runat="server"/> 

方法2：&nbsp

<asp:button id="btnSubmit" OnClick="Submit_Click" runat="server" OnClientClick="this.disabled=true;this.form.submit();" UseSubmitBehavior="False"/> 

方法3：&nbsp

this.btnSubmit.Attributes["onclick"]=this.GetPostBackEventReference(this.btnSubmit)+";this.disabled=true;";//防止重复提交