login.cs

此为本人和同学所开发的酒店管理系统.C#.net.也是软件工程课程的作业.

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

namespace RoomManage
{
	/// <summary>
	/// login 的摘要说明。
	/// </summary>
	public class login : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.TextBox textBox2;
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.Button button2;
		private System.Windows.Forms.ComboBox comboBox1;
		private System.Windows.Forms.Label label3;
		private System.Windows.Forms.Button button3;
		/// <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();
			//
			// 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>
		static void Main()
		{
			login log=new login ();
			log.ShowDialog ();
			Application.Run (new main (cc,ss));
		}

		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.label1 = new System.Windows.Forms.Label();
			this.label2 = new System.Windows.Forms.Label();
			this.textBox2 = new System.Windows.Forms.TextBox();
			this.button1 = new System.Windows.Forms.Button();
			this.button2 = new System.Windows.Forms.Button();
			this.comboBox1 = new System.Windows.Forms.ComboBox();
			this.label3 = new System.Windows.Forms.Label();
			this.button3 = new System.Windows.Forms.Button();
			this.SuspendLayout();
			// 
			// label1
			// 
			this.label1.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label1.Location = new System.Drawing.Point(16, 23);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(56, 23);
			this.label1.TabIndex = 0;
			this.label1.Text = "操作员：";
			this.label1.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
			// 
			// label2
			// 
			this.label2.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label2.Location = new System.Drawing.Point(16, 56);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(64, 23);
			this.label2.TabIndex = 1;
			this.label2.Text = "密  码：";
			this.label2.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
			// 
			// textBox2
			// 
			this.textBox2.Location = new System.Drawing.Point(80, 57);
			this.textBox2.Name = "textBox2";
			this.textBox2.PasswordChar = '*';
			this.textBox2.Size = new System.Drawing.Size(120, 21);
			this.textBox2.TabIndex = 1;
			this.textBox2.Text = "";
			// 
			// button1
			// 
			this.button1.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.button1.Location = new System.Drawing.Point(16, 112);
			this.button1.Name = "button1";
			this.button1.Size = new System.Drawing.Size(56, 23);
			this.button1.TabIndex = 2;
			this.button1.Text = "登陆";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// button2
			// 
			this.button2.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.button2.Location = new System.Drawing.Point(96, 112);
			this.button2.Name = "button2";
			this.button2.Size = new System.Drawing.Size(56, 23);
			this.button2.TabIndex = 3;
			this.button2.Text = "退出";
			this.button2.Click += new System.EventHandler(this.button2_Click);
			// 
			// comboBox1
			// 
			this.comboBox1.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
			this.comboBox1.Location = new System.Drawing.Point(80, 24);
			this.comboBox1.Name = "comboBox1";
			this.comboBox1.Size = new System.Drawing.Size(121, 20);
			this.comboBox1.TabIndex = 8;
			this.comboBox1.DropDown += new System.EventHandler(this.comboBox1_DropDown);
			this.comboBox1.SelectedIndexChanged += new System.EventHandler(this.comboBox1_SelectedIndexChanged);
			// 
			// label3
			// 
			this.label3.ForeColor = System.Drawing.Color.Red;
			this.label3.Location = new System.Drawing.Point(16, 88);
			this.label3.Name = "label3";
			this.label3.Size = new System.Drawing.Size(128, 23);
			this.label3.TabIndex = 7;
			this.label3.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
			// 
			// button3
			// 
			this.button3.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.button3.Location = new System.Drawing.Point(176, 112);
			this.button3.Name = "button3";
			this.button3.Size = new System.Drawing.Size(56, 23);
			this.button3.TabIndex = 4;
			this.button3.Text = "取消";
			this.button3.Click += new System.EventHandler(this.button3_Click);
			// 
			// login
			// 
			this.AutoScale = false;
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(240, 141);
			this.ControlBox = false;
			this.Controls.Add(this.button3);
			this.Controls.Add(this.label3);
			this.Controls.Add(this.comboBox1);
			this.Controls.Add(this.button2);
			this.Controls.Add(this.button1);
			this.Controls.Add(this.textBox2);
			this.Controls.Add(this.label2);
			this.Controls.Add(this.label1);
			this.MaximizeBox = false;
			this.MaximumSize = new System.Drawing.Size(248, 168);
			this.MinimizeBox = false;
			this.MinimumSize = new System.Drawing.Size(248, 168);
			this.Name = "login";
			this.ShowInTaskbar = false;
			this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
			this.Text = "系统登陆";
			this.TopMost = true;
			this.Load += new System.EventHandler(this.login_Load);
			this.ResumeLayout(false);

		}
		#endregion
		DataConn dc=new DataConn();
		public static char cc='0';//传递权限级别
		public static string ss="";//传递操作员姓名
		
		private void login_Load(object sender, System.EventArgs e)
		{
			this.AcceptButton=this.button1 ;//使每次按下回车键时总是激发button1
			this.textBox2 .Text ="";
		}

		private void button2_Click(object sender, System.EventArgs e)
		{
			this.label3 .Text ="";
			dc.exit();
		}

		private void button1_Click(object sender, System.EventArgs e)
		{
			this.label3 .Text ="";
			string str=dc.connstr ;
			SqlConnection conn=new SqlConnection (str);
			string sql="select 权限级别 from tabpurview where 操作员姓名='"+this.comboBox1 .Text +"' and  密码='"+this.textBox2 .Text+"'";
			SqlCommand cmd=new SqlCommand(sql,conn);			
			conn.Open ();
			SqlDataReader dr= cmd.ExecuteReader();
			
			try
			{
				if(dr.Read())
				{
					cc=Convert.ToChar(dr["权限级别"]);
					ss=this.comboBox1 .Text ;
				
					this.Close ();
				}
				else
				{
					this.label3 .Text ="密码有误！";
				}
			}
			catch(SqlException ee)
			{
				MessageBox.Show (ee.Message,"错误！");
				
			}
			finally
			{
				dr.Close ();
				conn.Close ();
				cmd.Dispose ();
			}
		}

		private void button3_Click(object sender, System.EventArgs e)
		{
			this.Close ();
		}

		private void comboBox1_SelectedIndexChanged(object sender, System.EventArgs e)
		{
			this.textBox2 .Text ="";
		}

		private void comboBox1_DropDown(object sender, System.EventArgs e)
		{
			string str=dc.connstr ;
			SqlConnection conn=new SqlConnection (str);
			string sql="select * from tabpurview";
			SqlDataAdapter adapter=new SqlDataAdapter (sql,conn);
			DataSet dataset=new DataSet ();
			try
			{
				adapter.Fill (dataset,"tabpurview");
	
				this.comboBox1 .DisplayMember="操作员姓名";
				this.comboBox1 .DataSource =dataset.Tables ["tabpurview"];

			}
			catch(SqlException ee)
			{
				MessageBox.Show (ee.Message,"错误！");
			}
			finally
			{
				conn.Dispose ();
				adapter.Dispose ();
				dataset.Dispose ();
			}
		}

	}
}