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📄 frmproductdetails.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。
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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 description for frmProductDetails.
	/// </summary>
	public class frmProductDetails : System.Windows.Forms.Form
	{
		private System.Windows.Forms.TextBox txtPrdName;
		private System.Windows.Forms.Label lblProdId;
		private System.Windows.Forms.Label lblCatCode;
		private System.Windows.Forms.Label lblPrdName;
		private System.Windows.Forms.Button btnSearch;
		private System.Windows.Forms.GroupBox grpSearch;
		private System.Windows.Forms.Button btnAdd;
		private System.ComponentModel.IContainer components;
		
		private System.Windows.Forms.Button btnUpdate;
		private System.Windows.Forms.Button btnNew;
		private System.Windows.Forms.ComboBox cboCatCode;
		private System.Windows.Forms.ComboBox cboProdId;
		private System.Windows.Forms.DataGrid dbgDispProd;
		private System.Windows.Forms.Button btnExit;
		private System.Windows.Forms.TreeView tvwCatCode;
		
		//other variables
		private string[] searchValue;
		private string prodName;
		private bool addFlag = false;
		private bool updatedFlag = false;
		private string catCode, str;
		private System.Windows.Forms.HelpProvider hlpProductDetails;
		private bool treePopulated = false;
		private System.Windows.Forms.ToolTip tipProductDetails;
		private OleDbDataReader reader;
		public static bool flag = false;
        private Settings settings;

		public frmProductDetails()
		{
			//initialize the arrays
			searchValue = new string[3];
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();
		    settings=new Settings();
            this.hlpProductDetails.HelpNamespace=settings.uiDirectory+ @"\HELP\SupermarketHelp.chm"; 
			//
			// TODO: Add any constructor code after InitializeComponent call
			//
		}

		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		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.txtPrdName = new System.Windows.Forms.TextBox();
			this.lblProdId = new System.Windows.Forms.Label();
			this.lblCatCode = new System.Windows.Forms.Label();
			this.cboCatCode = new System.Windows.Forms.ComboBox();
			this.lblPrdName = new System.Windows.Forms.Label();
			this.cboProdId = new System.Windows.Forms.ComboBox();
			this.btnSearch = new System.Windows.Forms.Button();
			this.grpSearch = new System.Windows.Forms.GroupBox();
			this.tvwCatCode = new System.Windows.Forms.TreeView();
			this.btnAdd = new System.Windows.Forms.Button();
			this.btnNew = new System.Windows.Forms.Button();
			this.btnUpdate = new System.Windows.Forms.Button();
			this.dbgDispProd = new System.Windows.Forms.DataGrid();
			this.btnExit = new System.Windows.Forms.Button();
			this.hlpProductDetails = new System.Windows.Forms.HelpProvider();
			this.tipProductDetails = new System.Windows.Forms.ToolTip(this.components);
			((System.ComponentModel.ISupportInitialize)(this.dbgDispProd)).BeginInit();
			this.SuspendLayout();
			// 
			// txtPrdName
			// 
			this.txtPrdName.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.hlpProductDetails.SetHelpKeyword(this.txtPrdName, "");
			this.txtPrdName.Location = new System.Drawing.Point(96, 40);
			this.txtPrdName.Name = "txtPrdName";
			this.hlpProductDetails.SetShowHelp(this.txtPrdName, true);
			this.txtPrdName.TabIndex = 2;
			this.txtPrdName.Text = "";
			this.txtPrdName.MouseHover += new System.EventHandler(this.txtPrdName_MouseHover);
			this.txtPrdName.Leave += new System.EventHandler(this.txtPrdName_Leave);
			// 
			// lblProdId
			// 
			this.lblProdId.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.lblProdId.Location = new System.Drawing.Point(376, 40);
			this.lblProdId.Name = "lblProdId";
			this.lblProdId.Size = new System.Drawing.Size(72, 16);
			this.lblProdId.TabIndex = 5;
			this.lblProdId.Text = "产品标识";
			this.lblProdId.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
			// 
			// lblCatCode
			// 
			this.lblCatCode.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.lblCatCode.Location = new System.Drawing.Point(208, 32);
			this.lblCatCode.Name = "lblCatCode";
			this.lblCatCode.Size = new System.Drawing.Size(80, 32);
			this.lblCatCode.TabIndex = 3;
			this.lblCatCode.Text = "类别代码";
			this.lblCatCode.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
			// 
			// cboCatCode
			// 
			this.cboCatCode.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.cboCatCode.Location = new System.Drawing.Point(288, 40);
			this.cboCatCode.Name = "cboCatCode";
			this.cboCatCode.Size = new System.Drawing.Size(80, 21);
			this.cboCatCode.TabIndex = 4;
			this.cboCatCode.MouseHover += new System.EventHandler(this.cboCatCode_MouseHover);
			// 
			// lblPrdName
			// 
			this.lblPrdName.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.lblPrdName.Location = new System.Drawing.Point(8, 40);
			this.lblPrdName.Name = "lblPrdName";
			this.lblPrdName.Size = new System.Drawing.Size(88, 16);
			this.lblPrdName.TabIndex = 1;
			this.lblPrdName.Text = "产品名称";
			this.lblPrdName.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
			// 
			// cboProdId
			// 
			this.cboProdId.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.cboProdId.Location = new System.Drawing.Point(448, 40);
			this.cboProdId.Name = "cboProdId";
			this.cboProdId.Size = new System.Drawing.Size(72, 21);
			this.cboProdId.TabIndex = 6;
			this.cboProdId.DropDown += new System.EventHandler(this.cboProdId_DropDown);
			this.cboProdId.MouseHover += new System.EventHandler(this.cboProdId_MouseHover);
			// 
			// btnSearch
			// 
			this.btnSearch.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.btnSearch.Location = new System.Drawing.Point(536, 40);
			this.btnSearch.Name = "btnSearch";
			this.btnSearch.TabIndex = 7;
			this.btnSearch.Text = "搜索(&S)";
			this.btnSearch.Click += new System.EventHandler(this.btnSearch_Click);
			// 
			// grpSearch
			// 
			this.grpSearch.Location = new System.Drawing.Point(0, 16);
			this.grpSearch.Name = "grpSearch";
			this.grpSearch.Size = new System.Drawing.Size(624, 48);
			this.grpSearch.TabIndex = 0;
			this.grpSearch.TabStop = false;
			// 
			// tvwCatCode
			// 
			this.tvwCatCode.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.tvwCatCode.ImageIndex = -1;
			this.tvwCatCode.Location = new System.Drawing.Point(8, 80);
			this.tvwCatCode.Name = "tvwCatCode";
			this.tvwCatCode.SelectedImageIndex = -1;
			this.tvwCatCode.Size = new System.Drawing.Size(216, 256);
			this.tvwCatCode.TabIndex = 8;
			this.tvwCatCode.Click += new System.EventHandler(this.tvwCatCode_Click);
			this.tvwCatCode.MouseHover += new System.EventHandler(this.tvwCatCode_MouseHover);
			this.tvwCatCode.AfterSelect += new System.Windows.Forms.TreeViewEventHandler(this.tvwCatCode_AfterSelect);
			// 
			// btnAdd
			// 
			this.btnAdd.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.btnAdd.Location = new System.Drawing.Point(8, 352);
			this.btnAdd.Name = "btnAdd";
			this.btnAdd.Size = new System.Drawing.Size(144, 23);
			this.btnAdd.TabIndex = 10;
			this.btnAdd.Text = "添加类别(&A)";
			this.btnAdd.Click += new System.EventHandler(this.btnAdd_Click);
			this.btnAdd.MouseHover += new System.EventHandler(this.btnAdd_MouseHover);
			// 
			// btnNew
			// 
			this.btnNew.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.btnNew.Location = new System.Drawing.Point(440, 352);
			this.btnNew.Name = "btnNew";
			this.btnNew.TabIndex = 11;
			this.btnNew.Text = "新建(&N)";
			this.btnNew.Click += new System.EventHandler(this.btnNew_Click);
			// 
			// btnUpdate
			// 
			this.btnUpdate.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.btnUpdate.Location = new System.Drawing.Point(528, 352);
			this.btnUpdate.Name = "btnUpdate";
			this.btnUpdate.TabIndex = 12;
			this.btnUpdate.Text = "更新(&U)";
			this.btnUpdate.Click += new System.EventHandler(this.btnUpdate_Click);
			this.btnUpdate.MouseHover += new System.EventHandler(this.btnUpdate_MouseHover);
			// 
			// dbgDispProd
			// 
			this.dbgDispProd.DataMember = "";
			this.dbgDispProd.Font = new System.Drawing.Font("Microsoft Sans Serif", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.dbgDispProd.HeaderForeColor = System.Drawing.SystemColors.ControlText;
			this.dbgDispProd.Location = new System.Drawing.Point(240, 80);
			this.dbgDispProd.Name = "dbgDispProd";
			this.dbgDispProd.Size = new System.Drawing.Size(432, 256);
			this.dbgDispProd.TabIndex = 9;
			this.dbgDispProd.MouseHover += new System.EventHandler(this.dbgDispProd_MouseHover);
			this.dbgDispProd.CurrentCellChanged += new System.EventHandler(this.dbgDispProd_CurrentCellChanged);
			// 
			// btnExit
			// 
			this.btnExit.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.btnExit.Location = new System.Drawing.Point(632, 352);
			this.btnExit.Name = "btnExit";
			this.btnExit.TabIndex = 13;
			this.btnExit.Text = "退出(&E)";
			this.btnExit.Click += new System.EventHandler(this.btnExit_Click);
			// 
			// hlpProductDetails
			// 
			this.hlpProductDetails.HelpNamespace = "";
			// 
			// tipProductDetails
			// 
			this.tipProductDetails.AutomaticDelay = 150;
			// 
			// frmProductDetails
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(720, 381);
			this.Controls.Add(this.btnExit);
			this.Controls.Add(this.dbgDispProd);
			this.Controls.Add(this.btnUpdate);
			this.Controls.Add(this.btnNew);
			this.Controls.Add(this.btnAdd);
			this.Controls.Add(this.tvwCatCode);
			this.Controls.Add(this.btnSearch);
			this.Controls.Add(this.cboProdId);
			this.Controls.Add(this.lblPrdName);
			this.Controls.Add(this.cboCatCode);
			this.Controls.Add(this.lblCatCode);
			this.Controls.Add(this.lblProdId);
			this.Controls.Add(this.txtPrdName);
			this.Controls.Add(this.grpSearch);
			this.Font = new System.Drawing.Font("Arial", 9F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.HelpButton = true;
			this.hlpProductDetails.SetHelpKeyword(this, "adding new products");
			this.hlpProductDetails.SetHelpString(this, "adding new products");
			this.Name = "frmProductDetails";
			this.hlpProductDetails.SetShowHelp(this, true);
			this.Text = "产品详细信息";
			this.Closing += new System.ComponentModel.CancelEventHandler(this.frmProductDetails_Closing);
			this.Paint += new System.Windows.Forms.PaintEventHandler(this.frmProductDetails_Paint);
			((System.ComponentModel.ISupportInitialize)(this.dbgDispProd)).EndInit();
			this.ResumeLayout(false);

		}
		#endregion

		private void btnSearch_Click(object sender, System.EventArgs e)
		{
			try
			{
				if(this.txtPrdName.Text != "") //if product name is not null
				{
					searchValue[0] =  this.txtPrdName.Text;
				}
				else
				{
					searchValue[0] =  "";
				}
				if(this.cboCatCode.Text != "") //if catcode is not null
				{
					searchValue[1] =  this.cboCatCode.Text;
				}
				else if(this.cboCatCode.Text == "") //if catcode is null
				{
					searchValue[1] =  "";
				}
				if(this.cboProdId.Text != "") //if prodid is not null
				{
					searchValue[2] =  this.cboProdId.Text;  
				}
				else
				{
					searchValue[2] = "" ;
				}

				StockManagement stkMgmt = new StockManagement();
				//fetch the product details
				if (stkMgmt.FetchProdDetails(searchValue).Rows.Count >0)
				{
					this.dbgDispProd.DataSource = stkMgmt.FetchProdDetails(searchValue);
					this.dbgDispProd.Refresh(); 
				
				}
				else //search yielded no records
				{
					MessageBox.Show ("未捕获到任何记录");
				}
				this.ClearDetails();
		
			}
			catch(Exception excep)
			{
				MessageBox.Show ("发生错误 "+excep.Message.ToString ()); 
			}
		}
		public void ClearDetails()
		{
			this.txtPrdName.Text = "";
			this.cboCatCode.Text = "";
			this.cboProdId.Text = "";
		}

		private void btnAdd_Click(object sender, System.EventArgs e)
		{
			addFlag = true;
			frmAddCategory frmCat = new frmAddCategory();
			frmCat.MdiParent=this.ParentForm;
			frmCat.Show();
		}

		private void txtPrdName_Leave(object sender, System.EventArgs e)
		{
			prodName  =  txtPrdName.Text;
		}

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

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