Web/Admin/Test/ViewTester.aspx.cs

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using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Collections.Generic;

using Entity;

public partial class Admin_Test_ViewTester : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        RoleCheck.DenyLogin();
    }
    protected void ObjectDataSource1_Selected(object sender, ObjectDataSourceStatusEventArgs e)
    {
        List<Entity.User> list =(List<Entity.User>)e.ReturnValue;
        lblTesterCount.Text = list.Count.ToString();
    }
}