frmlogin.cs

车载GPS？今天这个就是最好的工具

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.SqlClient;
using Microsoft.Win32;
namespace GEROSYS
{
	/// <summary>
	/// frmLogin 的摘要说明。
	/// </summary>
	public class frmLogin : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Button cmdAccept;
		private System.Windows.Forms.Button cmdCancel;
		private System.Windows.Forms.GroupBox groupBox1;
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.TextBox txtUserId;
		private System.Windows.Forms.TextBox txtPassword;
		private System.Windows.Forms.Label label2;
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private DataSet ldsUser;
		private DataTable ldtUser;
		private System.ComponentModel.Container components = null;
		private string strSQL;

		public string gUserId;
		public string gUserName;
		public GlobalPara g=new GlobalPara();
		private string Connectionstring  = new AccessData().ConnectionString;

		public frmLogin( )
		{
			//
			// 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.cmdAccept = new System.Windows.Forms.Button();
			this.cmdCancel = new System.Windows.Forms.Button();
			this.groupBox1 = new System.Windows.Forms.GroupBox();
			this.label2 = new System.Windows.Forms.Label();
			this.txtPassword = new System.Windows.Forms.TextBox();
			this.label1 = new System.Windows.Forms.Label();
			this.txtUserId = new System.Windows.Forms.TextBox();
			this.groupBox1.SuspendLayout();
			this.SuspendLayout();
			// 
			// cmdAccept
			// 
			this.cmdAccept.Location = new System.Drawing.Point(48, 136);
			this.cmdAccept.Name = "cmdAccept";
			this.cmdAccept.Size = new System.Drawing.Size(72, 24);
			this.cmdAccept.TabIndex = 0;
			this.cmdAccept.Text = "确认";
			this.cmdAccept.Click += new System.EventHandler(this.cmdAccept_Click);
			// 
			// cmdCancel
			// 
			this.cmdCancel.DialogResult = System.Windows.Forms.DialogResult.Cancel;
			this.cmdCancel.Location = new System.Drawing.Point(184, 136);
			this.cmdCancel.Name = "cmdCancel";
			this.cmdCancel.Size = new System.Drawing.Size(72, 24);
			this.cmdCancel.TabIndex = 1;
			this.cmdCancel.Text = "取消";
			this.cmdCancel.Click += new System.EventHandler(this.cmdCancel_Click);
			// 
			// groupBox1
			// 
			this.groupBox1.Controls.Add(this.label2);
			this.groupBox1.Controls.Add(this.txtPassword);
			this.groupBox1.Controls.Add(this.label1);
			this.groupBox1.Controls.Add(this.txtUserId);
			this.groupBox1.Location = new System.Drawing.Point(40, 8);
			this.groupBox1.Name = "groupBox1";
			this.groupBox1.Size = new System.Drawing.Size(224, 112);
			this.groupBox1.TabIndex = 2;
			this.groupBox1.TabStop = false;
			// 
			// label2
			// 
			this.label2.Location = new System.Drawing.Point(16, 72);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(48, 16);
			this.label2.TabIndex = 4;
			this.label2.Text = "密码:";
			// 
			// txtPassword
			// 
			this.txtPassword.AcceptsReturn = true;
			this.txtPassword.Location = new System.Drawing.Point(80, 72);
			this.txtPassword.Name = "txtPassword";
			this.txtPassword.PasswordChar = '*';
			this.txtPassword.Size = new System.Drawing.Size(120, 21);
			this.txtPassword.TabIndex = 1;
			this.txtPassword.Text = "";
			// 
			// label1
			// 
			this.label1.Location = new System.Drawing.Point(16, 32);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(56, 16);
			this.label1.TabIndex = 0;
			this.label1.Text = "工号:";
			// 
			// txtUserId
			// 
			this.txtUserId.Location = new System.Drawing.Point(80, 32);
			this.txtUserId.Name = "txtUserId";
			this.txtUserId.Size = new System.Drawing.Size(120, 21);
			this.txtUserId.TabIndex = 3;
			this.txtUserId.Text = "";
			// 
			// frmLogin
			// 
			this.AcceptButton = this.cmdAccept;
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.CancelButton = this.cmdCancel;
			this.ClientSize = new System.Drawing.Size(304, 186);
			this.Controls.Add(this.groupBox1);
			this.Controls.Add(this.cmdCancel);
			this.Controls.Add(this.cmdAccept);
			this.MaximizeBox = false;
			this.MinimizeBox = false;
			this.Name = "frmLogin";
			this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
			this.Text = "登录";
			this.Load += new System.EventHandler(this.frmLogin_Load);
			this.groupBox1.ResumeLayout(false);
			this.ResumeLayout(false);

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

		private void cmdAccept_Click(object sender, System.EventArgs e)
		{
			SqlConnection cnSQL;
			SqlCommand cmSQL;
			SqlDataReader drSQL;
			RegistryKey regRead;
			RegistryKey regWrite; 
        try 
		{
			
			strSQL = "SELECT user_id, user_name, user_cnname,password,role_id  FROM USERS where user_name='" + txtUserId.Text.Trim().ToString() + "'";
			cnSQL = new SqlConnection(Connectionstring);
			cnSQL.Open();
			cmSQL = new SqlCommand(strSQL, cnSQL);
			drSQL = cmSQL.ExecuteReader();

			if (drSQL.Read())
			{
				if (drSQL["password"].ToString()  != txtPassword.Text.Trim())
				{
					MessageBox.Show ( "用户密码不对,请重新输入!","提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
					txtPassword.Focus();
					SendKeys.Send( "{Home}+{End}");
					return;
				}

				regRead= Registry.CurrentUser.OpenSubKey("Software\\GERO",true); 

				if(regRead==null) 

				{ 
					regWrite = Registry.CurrentUser.CreateSubKey("Software\\GERO"); 
					regWrite.SetValue("COM",1); 
					regWrite.Close();
				} 
				else 
				{ 
					object obj= regRead.GetValue("COM"); 
					GlobalPara.ComValue  =Int32.Parse(obj.ToString());
					regRead.Close();
				} 

				g.gUserId = drSQL["user_name"].ToString() ;
				g.gUserName =drSQL["user_cnname"].ToString() ;
				g.gRoleId=drSQL["role_id"].ToString() ;
				this.Hide();
				GEROMain frm=new GEROMain(this);
				frm.Show();

			}
			else
			{
				MessageBox.Show( "用户名输入有误，请重新输入！","提示", MessageBoxButtons.OK, MessageBoxIcon.Warning); 
				this.txtUserId.Focus();
				SendKeys.Send ( "{Home}+{End}");
				return;
			}
			drSQL.Close();
			cnSQL.Close();
			cmSQL.Dispose();
			cnSQL.Dispose();
            
		} 
		catch(SqlException ms)
		{
			MessageBox.Show(ms.Message,  "SQL Error");

		} 
		catch(Exception ms)
		{
			MessageBox.Show(ms.Message, "General Error");
		}

		}

		private void frmLogin_Load(object sender, System.EventArgs e)
		{
			this.txtUserId.Focus();
		}

		
		private void cmdCancel_Click(object sender, System.EventArgs e)
		{
			if (MessageBox.Show("你确实要退出系统吗？","提示",MessageBoxButtons.YesNo,MessageBoxIcon.Exclamation) == DialogResult.Yes)
			{
				Application.Exit();
			}
		}


	}
}