loan.cs

我做的题库管理系统。大家看看吧

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.OleDb;
namespace timuku
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.Button button2;
		private System.Windows.Forms.GroupBox groupBox1;
		private System.Windows.Forms.Label label3;
		private System.Windows.Forms.RadioButton optongxue;
		private System.Windows.Forms.RadioButton opguanliyuan;
		private System.Windows.Forms.TextBox txtadmin;
		private System.Windows.Forms.TextBox txtpass;
		private OleDbConnection conn = null;
		private OleDbCommand comm=null;
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;

		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()
		{
			this.button1 = new System.Windows.Forms.Button();
			this.optongxue = new System.Windows.Forms.RadioButton();
			this.txtadmin = new System.Windows.Forms.TextBox();
			this.label1 = new System.Windows.Forms.Label();
			this.label2 = new System.Windows.Forms.Label();
			this.txtpass = new System.Windows.Forms.TextBox();
			this.opguanliyuan = new System.Windows.Forms.RadioButton();
			this.button2 = new System.Windows.Forms.Button();
			this.groupBox1 = new System.Windows.Forms.GroupBox();
			this.label3 = new System.Windows.Forms.Label();
			this.SuspendLayout();
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(26, 189);
			this.button1.Name = "button1";
			this.button1.Size = new System.Drawing.Size(64, 32);
			this.button1.TabIndex = 12;
			this.button1.Text = "确定 ";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// optongxue
			// 
			this.optongxue.Location = new System.Drawing.Point(42, 149);
			this.optongxue.Name = "optongxue";
			this.optongxue.Size = new System.Drawing.Size(64, 24);
			this.optongxue.TabIndex = 10;
			this.optongxue.Text = "同学";
			this.optongxue.CheckedChanged += new System.EventHandler(this.optongxue_CheckedChanged);
			// 
			// txtadmin
			// 
			this.txtadmin.Location = new System.Drawing.Point(90, 53);
			this.txtadmin.Name = "txtadmin";
			this.txtadmin.Size = new System.Drawing.Size(192, 21);
			this.txtadmin.TabIndex = 8;
			this.txtadmin.Text = "";
			// 
			// 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(10, 45);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(64, 32);
			this.label1.TabIndex = 5;
			this.label1.Text = "用户名";
			this.label1.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
			// 
			// 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(10, 101);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(64, 32);
			this.label2.TabIndex = 6;
			this.label2.Text = "密 码";
			this.label2.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
			// 
			// txtpass
			// 
			this.txtpass.Location = new System.Drawing.Point(90, 101);
			this.txtpass.Name = "txtpass";
			this.txtpass.PasswordChar = '*';
			this.txtpass.Size = new System.Drawing.Size(192, 21);
			this.txtpass.TabIndex = 7;
			this.txtpass.Text = "";
			// 
			// opguanliyuan
			// 
			this.opguanliyuan.Location = new System.Drawing.Point(170, 149);
			this.opguanliyuan.Name = "opguanliyuan";
			this.opguanliyuan.Size = new System.Drawing.Size(64, 24);
			this.opguanliyuan.TabIndex = 9;
			this.opguanliyuan.Text = "管理员";
			this.opguanliyuan.CheckedChanged += new System.EventHandler(this.opguanliyuan_CheckedChanged);
			// 
			// button2
			// 
			this.button2.Location = new System.Drawing.Point(162, 189);
			this.button2.Name = "button2";
			this.button2.Size = new System.Drawing.Size(64, 32);
			this.button2.TabIndex = 11;
			this.button2.Text = "退出";
			this.button2.Click += new System.EventHandler(this.button2_Click);
			// 
			// groupBox1
			// 
			this.groupBox1.Location = new System.Drawing.Point(18, 133);
			this.groupBox1.Name = "groupBox1";
			this.groupBox1.Size = new System.Drawing.Size(264, 48);
			this.groupBox1.TabIndex = 13;
			this.groupBox1.TabStop = false;
			// 
			// label3
			// 
			this.label3.Font = new System.Drawing.Font("宋体", 14.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label3.Location = new System.Drawing.Point(24, 16);
			this.label3.Name = "label3";
			this.label3.Size = new System.Drawing.Size(256, 24);
			this.label3.TabIndex = 14;
			this.label3.Text = "登陆界面";
			this.label3.TextAlign = System.Drawing.ContentAlignment.BottomCenter;
			this.label3.Click += new System.EventHandler(this.label3_Click);
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(288, 238);
			this.Controls.Add(this.label3);
			this.Controls.Add(this.button1);
			this.Controls.Add(this.optongxue);
			this.Controls.Add(this.txtadmin);
			this.Controls.Add(this.label1);
			this.Controls.Add(this.label2);
			this.Controls.Add(this.txtpass);
			this.Controls.Add(this.opguanliyuan);
			this.Controls.Add(this.button2);
			this.Controls.Add(this.groupBox1);
			this.Name = "Form1";
			this.Text = "Form1";
			this.ResumeLayout(false);

		}
		#endregion

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

	
		private void button1_Click(object sender, System.EventArgs e)
		{
			if(opguanliyuan.Checked)
			{
			string pass=txtpass.Text;
			this.conn=new OleDbConnection();
			conn.ConnectionString=@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=score.mdb ";
			string sqlstring="Select count(*) as num From passworld where 用户名='admin'and 密码='"+pass+"'";
			this.comm=new OleDbCommand(sqlstring,conn);
			conn.Open();
			OleDbDataReader dr=comm.ExecuteReader();
			dr.Read();
			txtpass.Text="";
			int cc=(int)(dr["num"]);
			    
				if (cc==0)
				{
					MessageBox.Show("用户名或者密码输入错误！请重新输入！");

				}
				else
				{
	               guanliyuan gly=new guanliyuan();
					gly.Show();
				}

			conn.Close();
				
			}
			if(optongxue.Checked)
			{
     			string user=txtadmin.Text;  //定义用户名
				string pass=txtpass.Text;//定义密码
				this.conn=new OleDbConnection(); //连接数据库
				conn.ConnectionString=@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=score.mdb "; //连接数据库score表
				string sqlstring="Select count(*) as num From passworld where 用户名='"+user+"'and 密码='"+pass+"'";//利用SQL里面的语言进行控制用户名和密码
				this.comm=new OleDbCommand(sqlstring,conn);//数据库识别器
				conn.Open();//打开
				OleDbDataReader dr=comm.ExecuteReader();//重载数据源
				dr.Read(); //开始读记录
				txtpass.Text="";
				int ss=(int)(dr["num"]);  //控制刚才的记录
			    
				if (ss==0)//输入的记录是否和数据库表里的记录相等
				{
					MessageBox.Show("用户名或者密码输入错误！请重新输入！");  

				}
				else
				{//正确跳转到xuesheng窗体界面中
					xuesheng r=new xuesheng();
					r.Show();
				}

				conn.Close();//关闭数据库连接
			}
			
		}

		private void opguanliyuan_CheckedChanged(object sender, System.EventArgs e)
		{
		   txtadmin.Text="admin"; //显示管理员的名称
		}

		private void optongxue_CheckedChanged(object sender, System.EventArgs e)
		{
		txtadmin.Text="汤定潭";
		}

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

		private void label3_Click(object sender, System.EventArgs e)
		{
		
		}

		 

		
		 
	}
}