界面上如下: 
<ext:Button runat="server" Icon="Delete" Text="删除" > 
<Listeners ><Click Handler="CompanyUser.DoConfirm()"/></Listeners> 
</ext:Button> 
还需要注意要加句这样的代码 
<ext:ScriptManager runat="server" AjaxMethodNamespace="CompanyUser"> 
</ext:ScriptManager> 
这个的CompanyUser 就是你建立页面的名称如:<%@ Page Language="C#" AutoEventWireup="true" CodeFile="CompanyUser.aspx.cs" Inherits="xitong_CompanyUser" %> 
CS里面的方法如下 
复制代码 代码如下:
 
/// <summary> 
/// 删除 
/// </summary> 
/// <param></param> 
/// <param></param> 
/// 
[AjaxMethod] 
public void onDeleteClick() 
{ 
Coolite.Ext.Web.CheckboxSelectionModel rsm = GridPanel1.SelectionModel.Primary as Coolite.Ext.Web.CheckboxSelectionModel; 
int count = 0; 
foreach (Coolite.Ext.Web.SelectedRow sm in rsm.SelectedRows) 
{ 
count = user.DeleteCompanyUser(int.Parse(sm.RecordID)); 
} 
if (count > 0) 
{ 
Ext.MessageBox.Alert("提示", "删除成功").Show(); 
} 
else 
{ 
Ext.MessageBox.Alert("提示", "删除失败,没有选中行!" ).Show(); 
} 
BindStore(); 
} 
/// <summary> 
/// 弹出删除对话框 
/// </summary> 
[AjaxMethod] 
public void DoConfirm() 
{ 
Ext.Msg.Confirm("消息提示", "是否删除选中行?", new MessageBox.ButtonsConfig 
{ 
Yes = new MessageBox.ButtonConfig 
{ 
Handler = "CompanyUser.onDeleteClick()", 
Text = "是" 
}, 
No = new MessageBox.ButtonConfig 
{ 
Text = "否" 
} 
}).Show(); 
}