AJAX回传过程中禁止用户重复提交
最近碰到一个问题:页面使用了Ajax,非jQuery,用的是微软的ScriptManager和UpdateProgress。如何在数据回传过程中禁止用户重复提交?即用户点了提交按钮后,按钮不能用,等到数据回传后,按钮状态自动变为可用!
前台页面:
<form id="form1" runat="server"> <asp:ScriptManager ID="ScriptManager1" runat="server" /> <asp:UpdatePanel runat="server" ID="UpdatePanel1"> <ContentTemplate> <asp:Button Text="提交" ID="btn_Go" runat="server" onclick="btn_Go_Click" /> </ContentTemplate> </asp:UpdatePanel> <asp:UpdateProgress ID="UpdateProgress1" runat="server" AssociatedUpdatePanelID="UpdatePanel1"> <ProgressTemplate> <img alt="" src="Images/Loading1.gif" style="width: 32px; height: 32px" />正在处理…… </ProgressTemplate> </asp:UpdateProgress> </form>
后台代码:
protected void Page_Load(object sender, EventArgs e) { ScriptManager.RegisterOnSubmitStatement(Page, typeof(Page), "Go_disabled", "document.getElementById('btn_Go').disabled='disabled';"); ScriptManager.RegisterStartupScript(Page, typeof(Page), "Clear_disabled", "document.getElementById('btn_Go').disabled='';", true); } protected void btn_Go_Click(object sender, EventArgs e) { System.Threading.Thread.Sleep(3000);//模拟任务 //for (long i = 1; i < 1000000000; i++) ; btn_Go.Text = "execute complete"; }