login.aspx.cs

图书馆管理信息系统设计 功能：图书的查询

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;

namespace Library_BS
{
	/// <summary>
	/// WebForm1 的摘要说明。
	/// </summary>
	public class WebForm1 : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.TextBox txtUsername;
		protected System.Web.UI.WebControls.TextBox txtBarCode;
		protected System.Web.UI.WebControls.TextBox txtPassword;
		protected System.Web.UI.WebControls.Button btnLogin;
		protected System.Web.UI.WebControls.Label Label1;
		protected System.Web.UI.WebControls.Button btnRegister;
	   
		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.btnLogin.Click += new System.EventHandler(this.btnLogin_Click);
			this.btnRegister.Click += new System.EventHandler(this.btnRegister_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion
          //注册按钮
		private void btnRegister_Click(object sender, System.EventArgs e)
		{
			Users myUsers=new Users();
			int errorCode=myUsers.UserRegister(this.txtBarCode.Text);
			
	        
			switch(errorCode)
			{
				case 0:
					string RealName=myUsers.getRealNameByUserBarCode(this.txtBarCode.Text);
					string UsersType=myUsers.getUsersType(this.txtBarCode.Text); 
					string UserDepart=myUsers.getUserDepartByUserBarCode(this.txtBarCode.Text);
					Response.Redirect("Register.aspx?UserBarCode="+this.txtBarCode.Text+"&UserRealName="+RealName+"&UsersType="+UsersType+
						"&UserDepart="+UserDepart);
					break;
				case 1:
					this.Label1.Text="已注册用户";
					break;
				case 2:
					this.Label1.Text="该证号不存在";
					break;

			}
			
		}
          //登录按钮
		private void btnLogin_Click(object sender, System.EventArgs e)
		{
			//判断用户是否输入了用户名和密码
			if(this.txtUsername.Text==""||this.txtPassword.Text=="")
			{
				this.Label1.Text="登录必须使用注册名和密码";
			}
			else 
			{
				Users myUsers=new Users();
				int count=myUsers.UsersLogin(this.txtUsername.Text,this.txtPassword.Text);
				switch(count)
				{
					case 1:
						string barcode=myUsers.GetBarCodeByRegisterName(this.txtUsername.Text);
						Response.Redirect("Main.aspx?Username="+
							this.txtUsername.Text+"&barcode="+barcode);

						break;
					case 0:
						this.Label1.Text="非法用户";
						break;
				}
			}
			
		}
	}
}