用委托来防止页面刷新提交

    private static bool SubmitState = false;
    protected void Page_Load(object sender, EventArgs e)
     ...{
        //判断页面是否初始化以及提交的状态
        if (IsPostBack && SubmitState)
         ...{  
                //从委托队列中删除原始事件
            this.Button1.Click -= new EventHandler(Button1_Click);
            this.Button1.Click += new EventHandler(kenButton1_Click);
         
        }
    }
  
    //重复提交事件
    private void kenButton1_Click(object sender, EventArgs e)
     ...{
        Response.Write("请不要重复提交，或者刷新");
       
    }

    //提交 
    protected void Button1_Click(object sender, EventArgs e)
     ...{ 
            
            Response.Write("提交成功");
            SubmitState = true;
            this.Button1.Click -= new EventHandler(Button1_Click);
            this.Button1.Click += new EventHandler(kenButton1_Click);
       
                           
    }