default.aspx.cs

网上考试系统

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.Configuration;
using System.Data.SqlClient;

namespace ClassOnline
{
	/// <summary>
	/// WebForm1 的摘要说明。
	/// </summary>
	public class WebForm1 : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Button btnCancel;
		protected System.Web.UI.WebControls.Button btnOK;
		protected System.Web.UI.WebControls.Label lblMsg;
		protected System.Web.UI.WebControls.TextBox txtPwd;
		protected System.Web.UI.WebControls.TextBox txtAccount;
		protected SqlConnection objconn;
		protected SqlCommand objcmd;
		string strSQL;
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			// 在此处放置用户代码以初始化页面
			if(!Page.IsPostBack)
			{
				lblMsg.Text="";
				txtAccount.Text="";
				txtPwd.Text="";
			}
			btnOK.Click+=new EventHandler(btnOK_Click);
			btnCancel.Click+=new EventHandler(btnCancel_Click);
		}

		#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.btnOK.Click += new System.EventHandler(this.btnOK_Click);
			this.btnCancel.Click += new System.EventHandler(this.btnCancel_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void btnOK_Click(object sender, System.EventArgs e)
		{
			//创建数据库连接对象
			objconn= new SqlConnection(ConfigurationSettings.AppSettings["connstr"]);
			//打开数据库
			objconn.Open();
			strSQL="select UserID from UserInfo where UserAccount='"+txtAccount.Text.ToString()+"' and UserPwd='"+txtPwd.Text.ToString()+"'";
			objcmd= new SqlCommand(strSQL,objconn);
			SqlDataReader dr= objcmd.ExecuteReader();
			if(dr.Read())
			{
				Session["UserID"]=dr["UserID"].ToString();
				Page.Response.Redirect("welcome.aspx");
			}
			else
			{
				lblMsg.Text="用户名或口令有错！请重新输入！";
				//txtAccount.Text="";
				txtPwd.Text="";
				//Page.Response.Write(Session.Count);
			}
			objconn.Close();
		}
		private void btnCancel_Click(object sender,System.EventArgs e)
		{
			lblMsg.Text="";
			txtAccount.Text="";
			txtPwd.Text="";
			Page.Response.Redirect("reg.aspx");
		}
	}
}