防止按f5刷新页面时，事件再执行（from:http://forums.asp.net/t/1484840.aspx）

来源：互联网发布：卡诺图化简软件编辑：程序博客网时间：2024/06/05 17:24

需要重写两个方法：

LoadViewState(object savedState)
和 SaveViewState()

private bool _refreshState;private bool _isRefresh;protected override void LoadViewState(object savedState){object[] AllStates = (object[]) savedState;base.LoadViewState(AllStates[0]);_refreshState = bool.Parse(AllStates[1].ToString());_isRefresh = _refreshState == bool.Parse(Session["__ISREFRESH"].ToString());}protected override object SaveViewState(){Session["__ISREFRESH"] = _refreshState;object[] AllStates = new object[2];AllStates[0] = base.SaveViewState();AllStates[1] = !(_refreshState);return AllStates;}//页面刷新时，的测试代码private void Button1_Click(object sender, System.EventArgs e){if(_isRefresh){Label1.Text = "This is Page Refresh";}else{Label1.Text = "This is Button Click";}}

很有用，所以收藏了