<%@ Page Language="C#" AutoEventWireup="true" CodeFile="ASPxLoadingPanel.aspx.cs" Inherits="ASPxLoadingPanel" %>  <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">  <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server">     <title></title>     <script src="Scripts/jquery-1.6.2.min.js" type="text/javascript"></script>     <script type="text/javascript">         $(document).ready(function () {              $("#CheckBox1").click(function () {                  if ($("#CheckBox1").attr("checked")) {                     //alert("选中了");                     //$("#LoadingPanel2").attr("ContainerElementID", "divLoad");                 } else {                     //alert("很遗憾");                     //$("#LoadingPanel2").attr("ContainerElementID", ""); 好像这样不行                  }             });         });     </script> </head> <body>     <form id="form1" runat="server">     <div>          <dx:ASPxLoadingPanel ID="ASPxLoadingPanel2" runat="server"              ClientInstanceName="LoadingPanel2" Text="加载中..."              SpriteImageUrl="~/imgs/load.gif" Theme="Mulberry" >                    </dx:ASPxLoadingPanel>         <!--             ContainerElementID 设置关联那个控件(当然还可以显示图片等信息)         -->          <div style="height: 74px; background-color: #00FFFF;" id="divLoad">       </div>     <dx:ASPxButton ID="ASPxButton1" runat="server" Text="显示Loading" AutoPostBack="false"              oncustomjsproperties="ASPxButton1_CustomJSProperties">         <ClientSideEvents Click="function(s, e) {                               LoadingPanel2.Show();               }" />     </dx:ASPxButton>         <br />     <dx:ASPxButton ID="ASPxButton2" runat="server" Text="停止Loading" AutoPostBack="False"              oncustomjsproperties="ASPxButton1_CustomJSProperties">         <ClientSideEvents Click="function(s, e) {                               LoadingPanel2.Hide();               }" />     </dx:ASPxButton>     <br />     <asp:CheckBox ID="CheckBox1" runat="server" Text="Container"  ClientIDMode="Static" />            <!--     总结：         LoadingPanel控件用于在回调服务器时在页面上展示的一个提示控件。         可通过 LoadPanel.Show()进行展示。         默认情况下，LoadingPanle是显示在网页正中的，如果更新的只是一个         局部的Panle或Div，则可以指定LoadingPanel的ContainerElementID，         显示时会在指定Control的上方。如             ASPxLoadingPanel1.ContainerElementID = "divLoad";      -->     </div>     </form>     <p>         ASPxLoadingPanel在前台可以用客户端名.Show().Hide()两个方法来显示隐藏，有没有在服务器端可以执行的方法或属性来显示隐藏</p> </body> </html>



using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls;  public partial class ASPxLoadingPanel : System.Web.UI.Page {     protected void Page_Load(object sender, EventArgs e)     {      }     protected void ASPxButton1_Click(object sender, EventArgs e)     {         // 服务器选择回延迟一个调用周期                 if (this.CheckBox1.Checked)             ASPxLoadingPanel2.ContainerElementID = "divLoad";         else             ASPxLoadingPanel2.ContainerElementID = "";              }     protected void ASPxButton1_CustomJSProperties(object sender, DevExpress.Web.CustomJSPropertiesEventArgs e)     {      } }