frmchangepassword.cs

本论文叙述了联机考试系统的现状以及C#语言的概况。重点介绍了联机考试系统的实现过程：包括系统分析、 系统调查、 数据流程分析、功能设计、 数据库设计、 系统物理配置方案、 系统实现、 系统测试和调试。

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

namespace SupermarketProject
{
	/// <summary>
	/// Summary description for ChangePassword.
	/// </summary>
	public class frmChangePassword : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Label lblOldPassword;
		private System.Windows.Forms.Label lblRetyeNewPassword;
		private System.Windows.Forms.Label lblNewPassword;
		private System.Windows.Forms.TextBox txtNewPwd;
		private System.Windows.Forms.TextBox txtOldPwd;
		private System.Windows.Forms.TextBox txtRNewPwd;
		private System.Windows.Forms.Button btnOK;
		private System.Windows.Forms.Button btnCancel;
		public string userId;
		public string password;
		private System.Windows.Forms.GroupBox grpLine;
		private System.Windows.Forms.HelpProvider hlpPassword;
		private System.Windows.Forms.ToolTip tipPassword;
		private System.ComponentModel.IContainer components;

		public frmChangePassword()
		{
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();

			//
			// TODO: Add any constructor code after InitializeComponent call
			//
		}
		public frmChangePassword(string usrId,string pwd)
		{
			InitializeComponent();

			this.userId = usrId;
			this.password = pwd; 
		}

			protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if(components != null)
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
			this.components = new System.ComponentModel.Container();
			this.lblOldPassword = new System.Windows.Forms.Label();
			this.lblRetyeNewPassword = new System.Windows.Forms.Label();
			this.lblNewPassword = new System.Windows.Forms.Label();
			this.txtNewPwd = new System.Windows.Forms.TextBox();
			this.txtOldPwd = new System.Windows.Forms.TextBox();
			this.txtRNewPwd = new System.Windows.Forms.TextBox();
			this.btnOK = new System.Windows.Forms.Button();
			this.btnCancel = new System.Windows.Forms.Button();
			this.grpLine = new System.Windows.Forms.GroupBox();
			this.hlpPassword = new System.Windows.Forms.HelpProvider();
			this.tipPassword = new System.Windows.Forms.ToolTip(this.components);
			this.SuspendLayout();
			// 
			// lblOldPassword
			// 
			this.lblOldPassword.Location = new System.Drawing.Point(19, 26);
			this.lblOldPassword.Name = "lblOldPassword";
			this.lblOldPassword.Size = new System.Drawing.Size(120, 25);
			this.lblOldPassword.TabIndex = 0;
			this.lblOldPassword.Text = "原密码";
			// 
			// lblRetyeNewPassword
			// 
			this.lblRetyeNewPassword.Location = new System.Drawing.Point(19, 112);
			this.lblRetyeNewPassword.Name = "lblRetyeNewPassword";
			this.lblRetyeNewPassword.Size = new System.Drawing.Size(163, 25);
			this.lblRetyeNewPassword.TabIndex = 4;
			this.lblRetyeNewPassword.Text = "确认新密码";
			// 
			// lblNewPassword
			// 
			this.lblNewPassword.Location = new System.Drawing.Point(19, 69);
			this.lblNewPassword.Name = "lblNewPassword";
			this.lblNewPassword.Size = new System.Drawing.Size(120, 25);
			this.lblNewPassword.TabIndex = 2;
			this.lblNewPassword.Text = "新密码";
			// 
			// txtNewPwd
			// 
			this.txtNewPwd.Location = new System.Drawing.Point(211, 69);
			this.txtNewPwd.Name = "txtNewPwd";
			this.txtNewPwd.PasswordChar = '*';
			this.txtNewPwd.Size = new System.Drawing.Size(120, 21);
			this.txtNewPwd.TabIndex = 3;
			this.txtNewPwd.Text = "";
			this.txtNewPwd.MouseHover += new System.EventHandler(this.txtNewPwd_MouseHover);
			// 
			// txtOldPwd
			// 
			this.txtOldPwd.Location = new System.Drawing.Point(211, 26);
			this.txtOldPwd.Name = "txtOldPwd";
			this.txtOldPwd.PasswordChar = '*';
			this.txtOldPwd.Size = new System.Drawing.Size(120, 21);
			this.txtOldPwd.TabIndex = 1;
			this.txtOldPwd.Text = "";
			this.txtOldPwd.MouseHover += new System.EventHandler(this.txtOldPwd_MouseHover);
			// 
			// txtRNewPwd
			// 
			this.txtRNewPwd.Location = new System.Drawing.Point(211, 112);
			this.txtRNewPwd.Name = "txtRNewPwd";
			this.txtRNewPwd.PasswordChar = '*';
			this.txtRNewPwd.Size = new System.Drawing.Size(120, 21);
			this.txtRNewPwd.TabIndex = 5;
			this.txtRNewPwd.Text = "";
			this.txtRNewPwd.MouseHover += new System.EventHandler(this.txtRNewPwd_MouseHover);
			// 
			// btnOK
			// 
			this.btnOK.Location = new System.Drawing.Point(317, 155);
			this.btnOK.Name = "btnOK";
			this.btnOK.Size = new System.Drawing.Size(105, 35);
			this.btnOK.TabIndex = 6;
			this.btnOK.Text = "确定(&O)";
			this.btnOK.Click += new System.EventHandler(this.btnOK_Click);
			this.btnOK.MouseHover += new System.EventHandler(this.btnOK_MouseHover);
			// 
			// btnCancel
			// 
			this.btnCancel.Location = new System.Drawing.Point(451, 155);
			this.btnCancel.Name = "btnCancel";
			this.btnCancel.Size = new System.Drawing.Size(115, 35);
			this.btnCancel.TabIndex = 7;
			this.btnCancel.Text = "取消(&C)";
			this.btnCancel.Click += new System.EventHandler(this.btnCancel_Click);
			// 
			// grpLine
			// 
			this.grpLine.Location = new System.Drawing.Point(-163, 138);
			this.grpLine.Name = "grpLine";
			this.grpLine.Size = new System.Drawing.Size(864, 8);
			this.grpLine.TabIndex = 9;
			this.grpLine.TabStop = false;
			// 
			// tipPassword
			// 
			this.tipPassword.AutomaticDelay = 150;
			// 
			// frmChangePassword
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(568, 205);
			this.Controls.Add(this.grpLine);
			this.Controls.Add(this.btnCancel);
			this.Controls.Add(this.btnOK);
			this.Controls.Add(this.txtRNewPwd);
			this.Controls.Add(this.txtOldPwd);
			this.Controls.Add(this.txtNewPwd);
			this.Controls.Add(this.lblNewPassword);
			this.Controls.Add(this.lblRetyeNewPassword);
			this.Controls.Add(this.lblOldPassword);
			this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
			this.Name = "frmChangePassword";
			this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
			this.Text = "修改密码";
			this.ResumeLayout(false);

		}
		#endregion

		private void ClearTextData()
		{
			this.txtOldPwd.Text="";
			this.txtNewPwd.Text="";
			this.txtRNewPwd.Text="";
			this.txtOldPwd.Focus();
		}

		private void btnOK_Click(object sender, System.EventArgs e)
		{
			if(this.txtOldPwd.Text.Trim() != this.password)
			{
				MessageBox.Show("原密码不正确");
				this.ClearTextData(); 
				return;
			}
			
			if (txtNewPwd.Text.Trim().Length == 0)
			{
				MessageBox.Show("需要新密码");
				txtNewPwd.Focus();
				return;
			}

			
			if(this.txtNewPwd.Text.Trim() != this.txtRNewPwd.Text.Trim())
			{
				MessageBox.Show("密码不匹配");
				txtNewPwd.Focus();
			}
			else
			{
				password = this.txtNewPwd.Text.Trim();
				this.Close();
			}

		}

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

		}

		private void txtOldPwd_MouseHover(object sender, System.EventArgs e)
		{
		this.tipPassword.SetToolTip(this.txtOldPwd,"输入原密码");	
		}

		private void txtNewPwd_MouseHover(object sender, System.EventArgs e)
		{
		this.tipPassword.SetToolTip(this.txtNewPwd,"输入新密码");	
		}

		private void txtRNewPwd_MouseHover(object sender, System.EventArgs e)
		{
			this.tipPassword.SetToolTip(this.txtRNewPwd,"确认新密码");	

		}

		private void btnOK_MouseHover(object sender, System.EventArgs e)
		{
			this.tipPassword.SetToolTip(this.btnOK,"修改原密码并存储到记录表中");	
		}

		

		

		

		

		
	}
}