form1.cs

简易专家系统程序

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

namespace netCS
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.Label label3;
		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.Data.SqlClient.SqlConnection sqlConnection1;
		private System.Windows.Forms.Button button3;
		/// <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 Form Designer generated code
		/// <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.label3 = 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.sqlConnection1 = new System.Data.SqlClient.SqlConnection();
			this.button3 = new System.Windows.Forms.Button();
			this.SuspendLayout();
			// 
			// label1
			// 
			this.label1.Font = new System.Drawing.Font("宋体", 14.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)), true);
			this.label1.Location = new System.Drawing.Point(8, 8);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(320, 56);
			this.label1.TabIndex = 0;
			this.label1.Text = "专家系统用户登录";
			// 
			// label2
			// 
			this.label2.Location = new System.Drawing.Point(56, 88);
			this.label2.Name = "label2";
			this.label2.TabIndex = 1;
			this.label2.Text = "用户名: ";
			// 
			// label3
			// 
			this.label3.Location = new System.Drawing.Point(56, 120);
			this.label3.Name = "label3";
			this.label3.TabIndex = 2;
			this.label3.Text = "密码: ";
			// 
			// textBox1
			// 
			this.textBox1.Location = new System.Drawing.Point(168, 88);
			this.textBox1.Name = "textBox1";
			this.textBox1.TabIndex = 3;
			this.textBox1.Text = "textBox1";
			// 
			// textBox2
			// 
			this.textBox2.Location = new System.Drawing.Point(168, 120);
			this.textBox2.Name = "textBox2";
			this.textBox2.PasswordChar = 'm';
			this.textBox2.TabIndex = 4;
			this.textBox2.Text = "textBox2";
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(80, 168);
			this.button1.Name = "button1";
			this.button1.TabIndex = 5;
			this.button1.Text = "登录";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// button2
			// 
			this.button2.Location = new System.Drawing.Point(184, 168);
			this.button2.Name = "button2";
			this.button2.TabIndex = 6;
			this.button2.Text = "未注册?";
			this.button2.Click += new System.EventHandler(this.button2_Click);
			// 
			// sqlConnection1
			// 
			this.sqlConnection1.ConnectionString = "data source=CLAUDE;initial catalog=ExpertSystem;persist security info=True;user i" +
				"d=sa;workstation id=CLAUDE;packet size=4096";
			// 
			// button3
			// 
			this.button3.Location = new System.Drawing.Point(80, 208);
			this.button3.Name = "button3";
			this.button3.TabIndex = 7;
			this.button3.Text = "退出系统";
			this.button3.Click += new System.EventHandler(this.button3_Click);
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(480, 301);
			this.Controls.AddRange(new System.Windows.Forms.Control[] {
																		  this.button3,
																		  this.button2,
																		  this.button1,
																		  this.textBox2,
																		  this.textBox1,
																		  this.label3,
																		  this.label2,
																		  this.label1});
			this.Name = "Form1";
			this.Text = "C";
			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)
		{
			SqlConnection cn=new SqlConnection(conn.con);
			SqlCommand com=new SqlCommand("select * from users where user_id='"+textBox1.Text+"' and pass_tx='"+textBox2.Text+"'",cn);
			SqlDataAdapter adp=new SqlDataAdapter(com);
			DataTable dt=new DataTable("mydt");
			adp.Fill(dt);
			if (dt.Rows.Count==0)
			{
				if(MessageBox.Show("用户名或密码错误","错误提示",MessageBoxButtons.RetryCancel)!=DialogResult.Cancel)
				{
					textBox1.Text="";
					textBox1.Focus();//?
					textBox2.Text="";
					textBox2.Focus();
				}
				else 
					Application.Exit();//结束应用程序
			}
			else
			{
				sysmain smain=new sysmain();
				smain.ShowDialog();
			}

		}

		private void button2_Click(object sender, System.EventArgs e)
		{
			//this.Close();
		    regist1 regist=new regist1();
			regist.ShowDialog();
			//this.Close();
		}

		private void button3_Click(object sender, System.EventArgs e)
		{
			Application.Exit();
		}
	}
}