login.cs

C#编写的学籍管理系统

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data.OleDb;
using System.Runtime.InteropServices;
using WindowsApplication1;
namespace WindowsApplication1
{
	/// <summary>
	/// denglu 的摘要说明。
	/// </summary>
	public class Login : System.Windows.Forms.Form
	{
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		/// 		
		[DllImport("User32.dll")]
		public static extern int MessageBox(int h,string m,string c,int type);
		private System.ComponentModel.Container components = null;
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.Label label2;
		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 label3;
		private System.Windows.Forms.PictureBox pictureBox1;
		public OleDbConnection cn=new OleDbConnection("Data Source=xsxxdb.mdb;Jet OLEDB:Engine Type=5;Provider=Microsoft.Jet.OLEDB.4.0;");

		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>
		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(Login));
			this.label1 = new System.Windows.Forms.Label();
			this.label2 = new System.Windows.Forms.Label();
			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.label3 = new System.Windows.Forms.Label();
			this.pictureBox1 = new System.Windows.Forms.PictureBox();
			this.SuspendLayout();
			// 
			// label1
			// 
			this.label1.AutoSize = true;
			this.label1.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
			this.label1.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label1.ForeColor = System.Drawing.SystemColors.ControlText;
			this.label1.Location = new System.Drawing.Point(30, 137);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(54, 17);
			this.label1.TabIndex = 0;
			this.label1.Text = "用户名称";
			// 
			// label2
			// 
			this.label2.AutoSize = true;
			this.label2.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
			this.label2.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label2.ForeColor = System.Drawing.SystemColors.ControlText;
			this.label2.Location = new System.Drawing.Point(30, 168);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(54, 17);
			this.label2.TabIndex = 1;
			this.label2.Text = "用户口令";
			// 
			// textBox1
			// 
			this.textBox1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
			this.textBox1.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.textBox1.ForeColor = System.Drawing.SystemColors.ControlText;
			this.textBox1.Location = new System.Drawing.Point(78, 137);
			this.textBox1.Name = "textBox1";
			this.textBox1.Size = new System.Drawing.Size(138, 21);
			this.textBox1.TabIndex = 2;
			this.textBox1.Text = "admin";
			// 
			// textBox2
			// 
			this.textBox2.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
			this.textBox2.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.textBox2.ForeColor = System.Drawing.SystemColors.ControlText;
			this.textBox2.Location = new System.Drawing.Point(78, 168);
			this.textBox2.Name = "textBox2";
			this.textBox2.PasswordChar = '*';
			this.textBox2.Size = new System.Drawing.Size(138, 21);
			this.textBox2.TabIndex = 3;
			this.textBox2.Text = "888";
			// 
			// button1
			// 
			this.button1.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.button1.ForeColor = System.Drawing.SystemColors.ControlText;
			this.button1.Location = new System.Drawing.Point(36, 199);
			this.button1.Name = "button1";
			this.button1.TabIndex = 4;
			this.button1.Text = "登录";
			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.ForeColor = System.Drawing.SystemColors.ControlText;
			this.button2.Location = new System.Drawing.Point(150, 199);
			this.button2.Name = "button2";
			this.button2.TabIndex = 5;
			this.button2.Text = "退出";
			this.button2.Click += new System.EventHandler(this.button2_Click);
			// 
			// label3
			// 
			this.label3.BackColor = System.Drawing.Color.DarkSlateBlue;
			this.label3.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
			this.label3.Font = new System.Drawing.Font("黑体", 16.2F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label3.ForeColor = System.Drawing.Color.Yellow;
			this.label3.Location = new System.Drawing.Point(-3, 87);
			this.label3.Name = "label3";
			this.label3.Size = new System.Drawing.Size(267, 37);
			this.label3.TabIndex = 6;
			this.label3.Text = "学生学籍管理系统";
			this.label3.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
			// 
			// pictureBox1
			// 
			this.pictureBox1.Image = ((System.Drawing.Image)(resources.GetObject("pictureBox1.Image")));
			this.pictureBox1.Location = new System.Drawing.Point(0, -19);
			this.pictureBox1.Name = "pictureBox1";
			this.pictureBox1.Size = new System.Drawing.Size(264, 125);
			this.pictureBox1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage;
			this.pictureBox1.TabIndex = 7;
			this.pictureBox1.TabStop = false;
			// 
			// Login
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(265, 228);
			this.Controls.Add(this.label3);
			this.Controls.Add(this.pictureBox1);
			this.Controls.Add(this.textBox2);
			this.Controls.Add(this.textBox1);
			this.Controls.Add(this.label2);
			this.Controls.Add(this.label1);
			this.Controls.Add(this.button2);
			this.Controls.Add(this.button1);
			this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedToolWindow;
			this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
			this.Name = "Login";
			this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
			this.Text = "用户登录";
			this.ResumeLayout(false);

		}
		#endregion

		private void button1_Click(object sender, System.EventArgs e)
		{
			//MessageBox(0,cn.ConnectionString,null,0);
			if (textBox1.Text.Trim()=="" || textBox2.Text.Trim()=="")
				MessageBox(0,"请输入用户名及密码","登录失败",0);
			else
			{
				cn.Open();
				OleDbCommand cmd=new OleDbCommand("",cn);
				string sql="select RoleName from userinfo where name='"+textBox1.Text.Trim()+"' and passwd='"+textBox2.Text.Trim()+"'";
				cmd.CommandText=sql;
				string rolename;
				
				if (null!=cmd.ExecuteScalar())
				{
					rolename=cmd.ExecuteScalar().ToString();
                   //隐藏登录窗口
				   this.Visible=false;  
				   //创建并打开主界面
				   MainForm mainfrm=new MainForm();
					mainfrm.Tag=this.FindForm();
				   sql="select * from Roles where RoleName='"+rolename+"'";
				   OleDbDataReader dr;
				   cmd.CommandText=sql;
				   dr=cmd.ExecuteReader();
					dr.Read();
     
					    mainfrm.menuItem16.Visible=(bool)(dr.GetValue(1));
					
						mainfrm.menuItem10.Visible=(bool)(dr.GetValue(2));
									
						mainfrm.menuItem1.Visible=(bool)(dr.GetValue(3));
					
						mainfrm.menuItem2.Visible=(bool)(dr.GetValue(4));
					
						mainfrm.menuItem3.Visible=(bool)(dr.GetValue(5));
					
						mainfrm.menuItem4.Visible=(bool)(dr.GetValue(6));
					
				   mainfrm.statusBarPanel2.Text=textBox1.Text.Trim();
				   mainfrm.ShowDialog(); 
				}
				else
                   MessageBox(0,"用户名或密码错误","登录失败",0);
				//dr.Close();
				cn.Close();
			}
		}

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


	}
}