employeelogin.cs

本系统为资产管理系统

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data.SqlClient;//访问数据库
using System.Data;//这也是
namespace AssetManagement//zheng ge gong cheng de  ming ming kongjian,
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private string EmployeeNo;//用户号
		private System.Windows.Forms.TextBox textBox1;
		private System.Windows.Forms.TextBox textBox2;
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.Button button2;
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.Label label3;
		private System.Windows.Forms.Label label4;
		private bool check = false;
		private MainForm1 mf;//主窗体，放在开头是为了只调用出一个主窗体；
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;
		public string GetEmployeeNo//在其他窗体获得用户登陆的用户号的属性；
		{
			get
			{
				return EmployeeNo;
			}
			set
			{
				EmployeeNo = value;
			}
		}
		public Form1()
		{
			//
			// Windows 窗体设计器支持所必需的
			//
			InitializeComponent();

			//
			// 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()
		{
			System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(Form1));
			this.textBox1 = new System.Windows.Forms.TextBox();
			this.textBox2 = new System.Windows.Forms.TextBox();
			this.button1 = new System.Windows.Forms.Button();
			this.button2 = new System.Windows.Forms.Button();
			this.label1 = new System.Windows.Forms.Label();
			this.label2 = new System.Windows.Forms.Label();
			this.label3 = new System.Windows.Forms.Label();
			this.label4 = new System.Windows.Forms.Label();
			this.SuspendLayout();
			// 
			// textBox1
			// 
			this.textBox1.Location = new System.Drawing.Point(96, 112);
			this.textBox1.Name = "textBox1";
			this.textBox1.Size = new System.Drawing.Size(112, 21);
			this.textBox1.TabIndex = 0;
			this.textBox1.Text = "";
			this.textBox1.TextChanged += new System.EventHandler(this.textBox1_TextChanged);
			// 
			// textBox2
			// 
			this.textBox2.Location = new System.Drawing.Point(96, 160);
			this.textBox2.Name = "textBox2";
			this.textBox2.PasswordChar = '*';
			this.textBox2.Size = new System.Drawing.Size(112, 21);
			this.textBox2.TabIndex = 1;
			this.textBox2.Text = "";
			this.textBox2.TextChanged += new System.EventHandler(this.textBox2_TextChanged);
			// 
			// button1
			// 
			this.button1.Font = new System.Drawing.Font("宋体", 10.5F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.button1.Location = new System.Drawing.Point(88, 216);
			this.button1.Name = "button1";
			this.button1.TabIndex = 2;
			this.button1.Text = "确定";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// button2
			// 
			this.button2.DialogResult = System.Windows.Forms.DialogResult.Cancel;
			this.button2.Font = new System.Drawing.Font("宋体", 10.5F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.button2.Location = new System.Drawing.Point(216, 216);
			this.button2.Name = "button2";
			this.button2.Size = new System.Drawing.Size(75, 24);
			this.button2.TabIndex = 3;
			this.button2.Text = "取消";
			this.button2.Click += new System.EventHandler(this.button2_Click);
			// 
			// label1
			// 
			this.label1.Font = new System.Drawing.Font("宋体", 10.5F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label1.Location = new System.Drawing.Point(8, 112);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(80, 24);
			this.label1.TabIndex = 4;
			this.label1.Text = "用户号";
			this.label1.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
			this.label1.Click += new System.EventHandler(this.label1_Click);
			// 
			// label2
			// 
			this.label2.Font = new System.Drawing.Font("宋体", 10.5F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label2.Location = new System.Drawing.Point(8, 160);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(80, 23);
			this.label2.TabIndex = 5;
			this.label2.Text = "密码";
			this.label2.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
			// 
			// label3
			// 
			this.label3.BackColor = System.Drawing.SystemColors.ControlLightLight;
			this.label3.Font = new System.Drawing.Font("楷体_GB2312", 18F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label3.Image = ((System.Drawing.Image)(resources.GetObject("label3.Image")));
			this.label3.Location = new System.Drawing.Point(-8, 0);
			this.label3.Name = "label3";
			this.label3.Size = new System.Drawing.Size(352, 80);
			this.label3.TabIndex = 6;
			this.label3.Text = "资产管理系统";
			this.label3.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
			// 
			// label4
			// 
			this.label4.Location = new System.Drawing.Point(224, 112);
			this.label4.Name = "label4";
			this.label4.TabIndex = 7;
			this.label4.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
			// 
			// Form1
			// 
			this.AcceptButton = this.button1;
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.CancelButton = this.button2;
			this.ClientSize = new System.Drawing.Size(338, 256);
			this.Controls.Add(this.label4);
			this.Controls.Add(this.label3);
			this.Controls.Add(this.label2);
			this.Controls.Add(this.label1);
			this.Controls.Add(this.button2);
			this.Controls.Add(this.button1);
			this.Controls.Add(this.textBox2);
			this.Controls.Add(this.textBox1);
			this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
			this.MaximizeBox = false;
			this.Name = "Form1";
			this.Text = "系统登录";
			this.Load += new System.EventHandler(this.Form1_Load);
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// 应用程序的主入口点。
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());//程序入口
		}

		private void label1_Click(object sender, System.EventArgs e)
		{
		}
        //mainForm main1 = new mainForm(textBox1.Text);
		private void button1_Click(object sender, System.EventArgs e)
		{
			//this.AcceptButton = this.button1;
			this.GetEmployeeNo = textBox1.Text.Trim().ToUpper();
			//mainForm main1 = new mainForm(this.GetEmployeeNo);
			employee em = new employee();//这在类文件中有；
			mf = new MainForm1(this.GetEmployeeNo);//这是将用户号调到主窗体中
			//mf.Show();
			em.Open();
			int s = em.employeeLogin((textBox1.Text.Trim().ToUpper()).ToString(),(textBox2.Text).ToString());
			if (s==1)
			{
				if (!mf.IsDisposed)
				{
					this.Visible = false;
					mf.Show();
					mf.ReturnClick +=new AssetManagement.MainForm1.ReturnHandler(mf_ReturnClick);
					mf.Focus();
					//this.Enabled = true;
				}
				else
				{
					mf = new MainForm1(textBox1.Text.Trim().ToUpper());
					this.Visible = false;
					mf.Show();
					mf.ReturnClick +=new AssetManagement.MainForm1.ReturnHandler(mf_ReturnClick);
				}

			}
			else
			{
				if (this.textBox1.Text.Trim() == "")
				{
					MessageBox.Show("请输入用户号！");
					this.textBox1.Focus();
				}
				else
				{
					if (this.textBox2.Text.Trim() == "")
					{
						MessageBox.Show("请输入密码！");
						this.textBox2.Focus();
					}
					else
					{
						if (!check)
						{
							MessageBox.Show("用户号错误！");
							this.textBox2.Text = "";
							this.textBox1.Text = "";
							this.textBox1.Focus();
						}
						else
						{
							MessageBox.Show("密码不正确！");
							this.textBox2.Text = "";
							this.textBox2.Focus();
						}
					}
				}
			}
			em.Close();
		}

		private void button2_Click(object sender, System.EventArgs e)
		{ 
			//this.CancelButton = button2;
			this.Close();
		}

		private void textBox1_TextChanged(object sender, System.EventArgs e)
		{
			if (this.textBox1.Text.Trim().Length > 8)
			{
				MessageBox.Show("输入数据无效！");
				this.label4.Text = "";
				this.textBox1.Text = "";
				this.textBox1.Focus();
			}
			else
			{
				Connection s = new Connection();
				SqlConnection conn = new SqlConnection(s.getConnectionString);
				conn.Open();
				string str = "select * from employee";
				SqlCommand cmd = new SqlCommand(str,conn);
				SqlDataReader dr = cmd.ExecuteReader();
				while (dr.Read())
				{
					if (this.textBox1.Text.Trim().ToUpper() == Convert.ToString(dr["employeeNo"]))
					{
						this.label4.Text = Convert.ToString(dr["employeeName"]);
						check = true;
						break;
					}
					check = false;
				}
				dr.Close();
				conn.Close();
			}
			if (!check)
			{
				this.label4.Text = "";
			}
		}

		private void textBox2_TextChanged(object sender, System.EventArgs e)
		{
			if (this.textBox1.Text.Trim().Length > 20)
			{
				MessageBox.Show("输入长度不能超过20位！");
				this.textBox1.Text = "";
			}
		}

		private void Form1_Load(object sender, System.EventArgs e)
		{
		}
		private void mf_ReturnClick()
		{
			this.Visible = true;
			this.textBox1.Text = "";
			this.textBox1.Focus();
			this.textBox2.Text = "";
			mf.getdispose(false);
			
		}
	}
}