//ASP.NET中防止页面多次提交的代码:javascript< script language="javascript"> < !-- function disableOtherSubmit() {  
var obj = event.srcElement;  
var objs = document.getElementsByTagName('INPUT');  
for(var i=0; i< objs.length; i++)  
...{  
if(objs[i].type.toLowerCase() == 'submit')  
...{  
objs[i].disabled = true;  
}  
}  
} //--> < /script>//ASP.NET中防止页面多次提交的代码:asp.netpublic class PreventMultiClick : System.Web.UI.Page ...{  
protected System.Web.UI.WebControls.Button Button1; protected System.Web.UI.WebControls.Button Button2;  
protected System.Web.UI.WebControls.LinkButton LinkButton1; protected System.Web.UI.WebControls.Button Button3; private void Page_Load(object sender, System.EventArgs e)  
...{  
this.GetPostBackEventReference(this.Button3);  
//保证 __doPostBack(eventTarget, eventArgument) 正确注册 if(!IsPostBack)  
...{  
System.Text.StringBuilder sb = new System.Text.StringBuilder();  
sb.Append("if (typeof(Page_ClientValidate) == 'function')  
...{  
if (Page_ClientValidate() == false)
...{
return false;  
}
}"); //保证验证函数的执行 sb.Append("if(window.confirm('are you sure?')==false) return false; ");  
//自定义客户端脚本 sb.Append("disableOtherSubmit(); ");  
// disable所有submit按钮 sb.Append(this.GetPostBackEventReference(this.Button3));  
//用__doPostBack来提交，保证按钮的服务器端click事件执行 sb.Append("; ");  
Button3.Attributes.Add("onclick",sb.ToString());  
}  
}
Web Form Designer generated code override protected void OnInit(EventArgs e) #region
Web Form Designer generated code override protected void OnInit(EventArgs e)  
...{  
// // CODEGEN: This call is required by the ASP.NET Web Form Designer. // InitializeComponent();  
base.OnInit(e);  
}  
/// < summary> /// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// < /summary> private void InitializeComponent()  
...{  
this.Button3.Click += new System.EventHandler(this.Button3_Click); this.Load += new System.EventHandler(this.Page_Load);  
}  
#endregion  
private void Button3_Click(object sender, System.EventArgs e)  
...{  
System.Threading.Thread.Sleep(3000);  
Response.Write("Hello world!");  
}  
}