login.cs

超市管理系统的完整版文档

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using SupDataBase;
using System.Data.SqlClient;
using System.Data;
using AppSuperMarket;

namespace WindowsApplication1
{
	/// <summary>
	/// Login 的摘要说明。
	/// </summary>
	public class Login : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Button m_bntComfirm;
		private System.Windows.Forms.Button m_bntCancel;
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.TextBox m_txtUserName;
		private System.Windows.Forms.TextBox m_txtPassword;
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;

		public Login()
		{
			//
			// Windows 窗体设计器支持所必需的
			//
			InitializeComponent();
			
			this.Visible = false;

			//
			// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
			//
		}

		/// <summary>
		/// 清理所有正在使用的资源。
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if(components != null)
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows 窗体设计器生成的代码
		/// <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.m_bntComfirm = new System.Windows.Forms.Button();
			this.m_bntCancel = new System.Windows.Forms.Button();
			this.label1 = new System.Windows.Forms.Label();
			this.m_txtUserName = new System.Windows.Forms.TextBox();
			this.label2 = new System.Windows.Forms.Label();
			this.m_txtPassword = new System.Windows.Forms.TextBox();
			this.SuspendLayout();
			// 
			// m_bntComfirm
			// 
			this.m_bntComfirm.DialogResult = System.Windows.Forms.DialogResult.OK;
			this.m_bntComfirm.Location = new System.Drawing.Point(64, 112);
			this.m_bntComfirm.Name = "m_bntComfirm";
			this.m_bntComfirm.Size = new System.Drawing.Size(64, 23);
			this.m_bntComfirm.TabIndex = 0;
			this.m_bntComfirm.Text = "确认";
			this.m_bntComfirm.Click += new System.EventHandler(this.m_bntComfirm_Click);
			// 
			// m_bntCancel
			// 
			this.m_bntCancel.Location = new System.Drawing.Point(176, 112);
			this.m_bntCancel.Name = "m_bntCancel";
			this.m_bntCancel.Size = new System.Drawing.Size(64, 23);
			this.m_bntCancel.TabIndex = 1;
			this.m_bntCancel.Text = "退出";
			this.m_bntCancel.Click += new System.EventHandler(this.m_bntCancel_Click);
			// 
			// label1
			// 
			this.label1.Location = new System.Drawing.Point(56, 32);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(56, 23);
			this.label1.TabIndex = 2;
			this.label1.Text = "用户名";
			// 
			// m_txtUserName
			// 
			this.m_txtUserName.Location = new System.Drawing.Point(136, 32);
			this.m_txtUserName.Name = "m_txtUserName";
			this.m_txtUserName.Size = new System.Drawing.Size(104, 21);
			this.m_txtUserName.TabIndex = 3;
			this.m_txtUserName.Text = "";
			// 
			// label2
			// 
			this.label2.Location = new System.Drawing.Point(56, 80);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(40, 16);
			this.label2.TabIndex = 4;
			this.label2.Text = "密码";
			// 
			// m_txtPassword
			// 
			this.m_txtPassword.Location = new System.Drawing.Point(136, 72);
			this.m_txtPassword.Name = "m_txtPassword";
			this.m_txtPassword.PasswordChar = '*';
			this.m_txtPassword.Size = new System.Drawing.Size(104, 21);
			this.m_txtPassword.TabIndex = 5;
			this.m_txtPassword.Text = "";
			// 
			// Login
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(328, 166);
			this.Controls.Add(this.m_txtPassword);
			this.Controls.Add(this.m_txtUserName);
			this.Controls.Add(this.label2);
			this.Controls.Add(this.label1);
			this.Controls.Add(this.m_bntCancel);
			this.Controls.Add(this.m_bntComfirm);
			this.MaximizeBox = false;
			this.Name = "Login";
			this.Text = "登录";
			this.Load += new System.EventHandler(this.Login_Load);
			this.Closed += new System.EventHandler(this.Login_Closed);
			this.ResumeLayout(false);

		}
		#endregion

		private void m_bntComfirm_Click(object sender, System.EventArgs e)
		{
		    string username = this.m_txtUserName.Text.Replace("'","");
			string pwd = this.m_txtPassword.Text.Replace("'","");
			username.Trim();
			pwd.Trim();
            
			
			string sql = "select * from Employee where UserName='"+ username + "' and Password='" + pwd+"'"; 
			try
			{
				SqlConnection conn = DBUtil.GetConnection();
				SqlCommand command = new SqlCommand ("",conn);
				command.Connection.Open();
				command.CommandText = sql;
				SqlDataReader reader = command.ExecuteReader();
				if(reader.Read())
				{   
					int employeeid = System.Convert.ToInt32(reader["EmployeeID"].ToString());
					int priority = System.Convert.ToInt32(reader["Priority"].ToString());
				    username = reader["UserName"].ToString();
                    
			        DBUtil.SetEmployeeID(employeeid);
					DBUtil.SetPriority(priority);
					DBUtil.SetUserName(username);
					DBUtil.SetLoginStatus(true);
                    
				    this.Close();

                    
                    
					//MainForm mainform = new MainForm();
					//mainform.Show();
			
				}
				else {

				  MessageBox.Show("用户名密码或错误！"); 
				  conn.Close();
				  return;
			    }
			    conn.Close();
				
			}
			catch(SqlException ex)
		    {
			  MessageBox.Show("用户名密码或错误！");
              m_txtPassword.Text="";
			  return;
		    }

		}

		private void m_bntCancel_Click(object sender, System.EventArgs e)
		{  
			this.Close();
		}

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

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

	
	}
}