index.aspx.cs

这个是用C#做底层开发车辆管理系统

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.Data.SqlClient;
namespace car1
{
	//该源码下载自www.51aspx.com(５１ａｓｐｘ．ｃｏｍ)
	/// <summary>
	/// index 的摘要说明。
	/// </summary>
	public class index : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Label err;
		protected System.Web.UI.WebControls.Button login;
		protected System.Web.UI.WebControls.RequiredFieldValidator repw;
		protected System.Web.UI.WebControls.TextBox password;
		protected System.Web.UI.WebControls.RequiredFieldValidator reusername;
		protected System.Web.UI.WebControls.TextBox username;
		protected System.Web.UI.WebControls.Label Label1;
		protected System.Web.UI.HtmlControls.HtmlForm Form1;
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			
            
			// 在此处放置用户代码以初始化页面
		}

		#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.login.Click += new System.EventHandler(this.login_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void login_Click(object sender, System.EventArgs e)
		{
			
			//检查帐号和密码
			if(this.username.Text=="user"&this.password.Text=="user")
			{
				Session["S_username"]="";
				Response.Redirect("main2.aspx");
				
			}
			string SqlConn=System.Configuration.ConfigurationSettings.AppSettings["ConnString"];
			SqlConnection Conn=new SqlConnection(SqlConn);
			Conn.Open();
			string SqlStr0="select username,userpwd,userrule from [user] where username='"+this.username.Text+"' and userpwd='"+this.password.Text+"' and userrule='普通用户' and part='院办(车队)'";
			SqlCommand Comm0=new SqlCommand(SqlStr0,Conn);
			SqlDataReader read0=Comm0.ExecuteReader();
			if(read0.Read())
			{
				Session["S_username"]=this.username.Text;
				Session["S_userpwd"]=this.password.Text;
				//Session["S_part"]=read0["part"].ToString();
				Session["S_userrule"]="";
				Response.Redirect("main3.aspx");
				read0.Close();
				Conn.Close();
			}
			else
			{
				read0.Close();
				string SqlStr1="select username,userpwd,userrule from [user] where username='"+this.username.Text+"' and userpwd='"+this.password.Text+"' and userrule='超级用户'";
				SqlCommand Comm1=new SqlCommand(SqlStr1,Conn);
				SqlDataReader read1=Comm1.ExecuteReader();
				if(read1.Read())
				{
					this.Label1.Text=read1["userrule"].ToString();
					Session["S_username"]=this.username.Text;
					Session["S_userpwd"]=this.password.Text;
					Session["S_userrule"]=this.Label1.Text;
				
					Response.Redirect("main.aspx");
					read1.Close();
					Conn.Close();
				
				}
				else
				{
					read1.Close();
					string SqlStr2="select username,userpwd,part from [user] where username='"+this.username.Text+"' and userpwd='"+this.password.Text+"' and userrule='普通用户'";
					SqlCommand Comm2=new SqlCommand(SqlStr2,Conn);
					SqlDataReader read2=Comm2.ExecuteReader();
					if(read2.Read())
					{
					
						Session["S_username"]=this.username.Text;
						Session["S_userpwd"]=this.password.Text;
						Session["S_part"]=read2["part"].ToString();
						Session["S_userrule"]="";
						Response.Redirect("main1.aspx");
						read2.Close();
						Conn.Close();
					
					}
					
					else
					{
						read2.Close();
						string SqlStr3="select username,userpwd from [user] where username='"+this.username.Text+"' and userpwd='"+this.password.Text+"' and shenhe='0'";
						SqlCommand Comm3=new SqlCommand(SqlStr3,Conn);
						SqlDataReader read3=Comm3.ExecuteReader();
						if(read3.Read())
						{
							this.err.Text="对不起，您还没有通过审核！";
							read3.Close();
							Conn.Close();
							this.username.Text="";
							this.password.Text="";

						}
						else
						{
							read3.Close();
							Conn.Close();
							this.err.Text="您输入的用户名或密码错误";
							this.username.Text="";
							this.password.Text="";
						}
					
					
					
					}
				
				}
			}
			
			
		}
	}
}