user.aspx.cs

用ASP.NET（C#）、SQL Server2000数据库开发在线考试系统源代码

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
using System.Configuration;

namespace ExamineSystem
{
	/// <summary>
	/// user 的摘要说明。
	/// </summary>
	public class User : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Image RegisterImage;
		protected System.Web.UI.WebControls.Label InfoLabel;
		protected System.Web.UI.HtmlControls.HtmlGenericControl title;
		protected System.Web.UI.WebControls.TextBox UserName;
		protected System.Web.UI.HtmlControls.HtmlTableCell TD1;
		protected System.Web.UI.WebControls.DataGrid NewsList;

		private void Page_Load(object sender, System.EventArgs e)
		{
			///验证用户的权限
			if(Session["UserID"] == null)
			{
				Response.Write("<script>alert(\"你还没有登录！！！\")</script>");
				Response.Redirect("~/Default.aspx");
             }
				
			if(!Page.IsPostBack)
			{
				BindUserData(Int32.Parse(Session["UserID"].ToString()));
				BindNewsData();
			}
		}
		
		private void BindUserData(int nUserID)
		{
			UserDB user = new UserDB();
			SqlDataReader recu = user.GetSingleUser(nUserID);

			while(recu.Read())
			{
				Session["UserName"] = recu["UserName"].ToString();
			}
			recu.Close();
		}
		private void BindNewsData()
		{
			NewsList.DataSource = null;
			NewsList.DataBind();

			SqlConnection myConnection = new SqlConnection(SQLHelper.DBCONNECTIONSTRING);
			String cmdText = "SELECT * FROM News";
			SqlCommand myCommand = new SqlCommand(cmdText,myConnection);
			myConnection.Open();
			SqlDataReader recn = myCommand.ExecuteReader(CommandBehavior.CloseConnection);
			//设置控件的数据源，并绑定DataGrid控件数据
			NewsList.DataSource = recn;
			NewsList.DataBind();
			recn.Close();
		}
		
		private void NewsList_SelectedIndexChanged(object sender, System.EventArgs e)
		{
		
		}
		#region Web 窗体设计器生成的代码
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容。
		/// </summary>
		private void InitializeComponent()
		{    
			this.UserName.TextChanged += new System.EventHandler(this.UserName_TextChanged);
			this.NewsList.SelectedIndexChanged += new System.EventHandler(this.NewsList_SelectedIndexChanged);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void UserName_TextChanged(object sender, System.EventArgs e)
		{
		
		}
	}
}