frmreturn.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;
using System.Data;
using System.Data.OleDb;

namespace SupermarketProject
{
	/// <summary>
	/// </summary>
	public class frmReturn : System.Windows.Forms.Form
	{
		private System.Windows.Forms.GroupBox groupBox2;
		private System.Windows.Forms.ComboBox cboDateCriteria;
		private System.Windows.Forms.Button btnSearch;
		private System.Windows.Forms.DateTimePicker dtpBillDate;
		private System.Windows.Forms.TextBox txtBillId;
		private System.Windows.Forms.CheckedListBox chlProductList;
		private System.Windows.Forms.Button btnReturn;
		private System.Windows.Forms.Button btnShowRetLog;
		private System.Windows.Forms.Button btnExit;
		private System.ComponentModel.IContainer components;
		private System.Windows.Forms.Label lblBillDate;
		private System.Windows.Forms.Label lblBillNo;

		//other variables
		private string[] searchValue;
		private System.Windows.Forms.DataGrid dbgBillInfo; 
		private string [] prodId;
		private string [,] productInfo;
		private string logFilePath;		
		private bool flag;
		private System.Windows.Forms.Label lblDateCriteria;
		private System.Windows.Forms.HelpProvider hlpReturns;
		private System.Windows.Forms.ToolTip tipReturns;
		private int billNo;
		private System.Windows.Forms.GroupBox grpReturn; 
        private bool dateSelected=false;
		private Settings settings;

		public frmReturn()
		{
			searchValue = new string[3];
			productInfo = new string[100,100];
			InitializeComponent();
			settings = new Settings();

            this.hlpReturns.HelpNamespace=settings.uiDirectory+ @"\HELP\SupermarketHelp.chm"; 
			//
			//
		}

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

		#region Windows Form Designer generated code
		/// <summary>
		
		/// </summary>
		private void InitializeComponent()
		{
			this.components = new System.ComponentModel.Container();
			this.grpReturn = new System.Windows.Forms.GroupBox();
			this.lblDateCriteria = new System.Windows.Forms.Label();
			this.cboDateCriteria = new System.Windows.Forms.ComboBox();
			this.btnSearch = new System.Windows.Forms.Button();
			this.dtpBillDate = new System.Windows.Forms.DateTimePicker();
			this.lblBillDate = new System.Windows.Forms.Label();
			this.txtBillId = new System.Windows.Forms.TextBox();
			this.lblBillNo = new System.Windows.Forms.Label();
			this.dbgBillInfo = new System.Windows.Forms.DataGrid();
			this.chlProductList = new System.Windows.Forms.CheckedListBox();
			this.btnReturn = new System.Windows.Forms.Button();
			this.groupBox2 = new System.Windows.Forms.GroupBox();
			this.btnExit = new System.Windows.Forms.Button();
			this.btnShowRetLog = new System.Windows.Forms.Button();
			this.hlpReturns = new System.Windows.Forms.HelpProvider();
			this.tipReturns = new System.Windows.Forms.ToolTip(this.components);
			this.grpReturn.SuspendLayout();
			((System.ComponentModel.ISupportInitialize)(this.dbgBillInfo)).BeginInit();
			this.SuspendLayout();
			// 
			// grpReturn
			// 
			this.grpReturn.Controls.Add(this.lblDateCriteria);
			this.grpReturn.Controls.Add(this.cboDateCriteria);
			this.grpReturn.Controls.Add(this.btnSearch);
			this.grpReturn.Controls.Add(this.dtpBillDate);
			this.grpReturn.Controls.Add(this.lblBillDate);
			this.grpReturn.Controls.Add(this.txtBillId);
			this.grpReturn.Controls.Add(this.lblBillNo);
			this.grpReturn.Location = new System.Drawing.Point(4, 6);
			this.grpReturn.Name = "grpReturn";
			this.grpReturn.Size = new System.Drawing.Size(788, 46);
			this.grpReturn.TabIndex = 0;
			this.grpReturn.TabStop = false;
			this.grpReturn.Text = "选择任何一个参数进行搜索";
			// 
			// lblDateCriteria
			// 
			this.lblDateCriteria.Location = new System.Drawing.Point(472, 17);
			this.lblDateCriteria.Name = "lblDateCriteria";
			this.lblDateCriteria.Size = new System.Drawing.Size(88, 23);
			this.lblDateCriteria.TabIndex = 4;
			this.lblDateCriteria.Text = "日期标准";
			// 
			// cboDateCriteria
			// 
			this.cboDateCriteria.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
			this.hlpReturns.SetHelpKeyword(this.cboDateCriteria, "search");
			this.cboDateCriteria.Items.AddRange(new object[] {
																 "Today",
																 "This Week",
																 "This Month",
																 "This Year"});
			this.cboDateCriteria.Location = new System.Drawing.Point(560, 16);
			this.cboDateCriteria.Name = "cboDateCriteria";
			this.hlpReturns.SetShowHelp(this.cboDateCriteria, true);
			this.cboDateCriteria.Size = new System.Drawing.Size(112, 23);
			this.cboDateCriteria.TabIndex = 5;
			this.cboDateCriteria.DropDown += new System.EventHandler(this.cboDateCriteria_DropDown);
			this.cboDateCriteria.MouseHover += new System.EventHandler(this.cboDateCriteria_MouseHover);
			// 
			// btnSearch
			// 
			this.btnSearch.Location = new System.Drawing.Point(688, 16);
			this.btnSearch.Name = "btnSearch";
			this.btnSearch.Size = new System.Drawing.Size(68, 22);
			this.btnSearch.TabIndex = 6;
			this.btnSearch.Text = "搜索(&S)...";
			this.btnSearch.Click += new System.EventHandler(this.btnSearch_Click);
			// 
			// dtpBillDate
			// 
			this.hlpReturns.SetHelpKeyword(this.dtpBillDate, "search");
			this.dtpBillDate.Location = new System.Drawing.Point(264, 16);
			this.dtpBillDate.Name = "dtpBillDate";
			this.hlpReturns.SetShowHelp(this.dtpBillDate, true);
			this.dtpBillDate.TabIndex = 3;
			this.dtpBillDate.MouseHover += new System.EventHandler(this.dtpBillDate_MouseHover);
			this.dtpBillDate.ValueChanged += new System.EventHandler(this.dtpBillDate_ValueChanged);
			// 
			// lblBillDate
			// 
			this.lblBillDate.Location = new System.Drawing.Point(202, 16);
			this.lblBillDate.Name = "lblBillDate";
			this.lblBillDate.Size = new System.Drawing.Size(64, 16);
			this.lblBillDate.TabIndex = 2;
			this.lblBillDate.Text = "帐单日期";
			// 
			// txtBillId
			// 
			this.hlpReturns.SetHelpKeyword(this.txtBillId, "search");
			this.txtBillId.Location = new System.Drawing.Point(66, 16);
			this.txtBillId.Name = "txtBillId";
			this.hlpReturns.SetShowHelp(this.txtBillId, true);
			this.txtBillId.Size = new System.Drawing.Size(134, 21);
			this.txtBillId.TabIndex = 1;
			this.txtBillId.Text = "";
			this.txtBillId.MouseHover += new System.EventHandler(this.txtBillId_MouseHover);
			this.txtBillId.TextChanged += new System.EventHandler(this.txtBillId_TextChanged);
			// 
			// lblBillNo
			// 
			this.lblBillNo.Location = new System.Drawing.Point(8, 20);
			this.lblBillNo.Name = "lblBillNo";
			this.lblBillNo.Size = new System.Drawing.Size(60, 12);
			this.lblBillNo.TabIndex = 0;
			this.lblBillNo.Text = "帐单编号";
			// 
			// dbgBillInfo
			// 
			this.dbgBillInfo.DataMember = "";
			this.dbgBillInfo.HeaderForeColor = System.Drawing.SystemColors.ControlText;
			this.dbgBillInfo.Location = new System.Drawing.Point(8, 58);
			this.dbgBillInfo.Name = "dbgBillInfo";
			this.dbgBillInfo.ReadOnly = true;
			this.dbgBillInfo.Size = new System.Drawing.Size(386, 256);
			this.dbgBillInfo.TabIndex = 1;
			this.dbgBillInfo.CurrentCellChanged += new System.EventHandler(this.dbgBillInfo_CurrentCellChanged);
			// 
			// chlProductList
			// 
			this.chlProductList.Location = new System.Drawing.Point(408, 64);
			this.chlProductList.MultiColumn = true;
			this.chlProductList.Name = "chlProductList";
			this.chlProductList.Size = new System.Drawing.Size(368, 196);
			this.chlProductList.TabIndex = 2;
			this.chlProductList.MouseHover += new System.EventHandler(this.chlProductList_MouseHover);
			// 
			// btnReturn
			// 
			this.btnReturn.Enabled = false;
			this.btnReturn.Location = new System.Drawing.Point(582, 272);
			this.btnReturn.Name = "btnReturn";
			this.btnReturn.Size = new System.Drawing.Size(164, 40);
			this.btnReturn.TabIndex = 3;
			this.btnReturn.Text = "退回选定产品(&R)...";
			this.btnReturn.Click += new System.EventHandler(this.btnReturn_Click);
			this.btnReturn.MouseHover += new System.EventHandler(this.btnReturn_MouseHover);
			// 
			// groupBox2
			// 
			this.groupBox2.Location = new System.Drawing.Point(4, 318);
			this.groupBox2.Name = "groupBox2";
			this.groupBox2.Size = new System.Drawing.Size(750, 6);
			this.groupBox2.TabIndex = 6;
			this.groupBox2.TabStop = false;
			// 
			// btnExit
			// 
			this.btnExit.Location = new System.Drawing.Point(662, 330);
			this.btnExit.Name = "btnExit";
			this.btnExit.Size = new System.Drawing.Size(84, 38);
			this.btnExit.TabIndex = 5;
			this.btnExit.Text = "退出(&E)";
			this.btnExit.Click += new System.EventHandler(this.btnExit_Click);
			// 
			// btnShowRetLog
			// 
			this.btnShowRetLog.Enabled = false;
			this.btnShowRetLog.Location = new System.Drawing.Point(492, 330);
			this.btnShowRetLog.Name = "btnShowRetLog";
			this.btnShowRetLog.Size = new System.Drawing.Size(162, 38);
			this.btnShowRetLog.TabIndex = 4;
			this.btnShowRetLog.Text = "显示退货日志(&L)...";
			this.btnShowRetLog.Click += new System.EventHandler(this.btnShowRetLog_Click);
			this.btnShowRetLog.MouseHover += new System.EventHandler(this.btnShowRetLog_MouseHover);
			// 
			// hlpReturns
			// 
			this.hlpReturns.HelpNamespace = "D:\\Project10102004\\HTM_FILES_FOR_HELP\\SUPERMARKETHELP.CHM";
			// 
			// tipReturns
			// 
			this.tipReturns.AutomaticDelay = 150;
			// 
			// frmReturn