generaterevenue.cs

北大青鸟内部资料

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

namespace Car_Inventory_Control
{
	/// <summary>
	/// Summary description for GenerateRevenue.
	/// </summary>
	public class frmGenerateRevenue : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Label lblttrvn;
		private System.Windows.Forms.Label lblTotalRevenueDetail;
		private System.Windows.Forms.ListBox lstSaleDetail;
		/// <summary>
		/// Required designer variable.
		/// </summary>
		private System.ComponentModel.Container components = null;
		private FileStream fsMaster,fsSale;
		BinaryReader masterReader, saleReader;
		
		public frmGenerateRevenue()
		{
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();

			//
			// 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.lblttrvn = new System.Windows.Forms.Label();
			this.lblTotalRevenueDetail = new System.Windows.Forms.Label();
			this.lstSaleDetail = new System.Windows.Forms.ListBox();
			this.SuspendLayout();
			// 
			// lblttrvn
			// 
			this.lblttrvn.Location = new System.Drawing.Point(56, 373);
			this.lblttrvn.Name = "lblttrvn";
			this.lblttrvn.Size = new System.Drawing.Size(99, 25);
			this.lblttrvn.TabIndex = 0;
			this.lblttrvn.Text = "生成的总利益：";
			// 
			// lblTotalRevenueDetail
			// 
			this.lblTotalRevenueDetail.Location = new System.Drawing.Point(211, 370);
			this.lblTotalRevenueDetail.Name = "lblTotalRevenueDetail";
			this.lblTotalRevenueDetail.Size = new System.Drawing.Size(106, 25);
			this.lblTotalRevenueDetail.TabIndex = 1;
			// 
			// lstSaleDetail
			// 
			this.lstSaleDetail.ItemHeight = 12;
			this.lstSaleDetail.Items.AddRange(new object[] {
															   "汽车型号\t\t 利润"});
			this.lstSaleDetail.Location = new System.Drawing.Point(29, 32);
			this.lstSaleDetail.Name = "lstSaleDetail";
			this.lstSaleDetail.Size = new System.Drawing.Size(269, 304);
			this.lstSaleDetail.TabIndex = 2;
			// 
			// frmGenerateRevenue
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.AutoScroll = true;
			this.ClientSize = new System.Drawing.Size(336, 410);
			this.Controls.Add(this.lstSaleDetail);
			this.Controls.Add(this.lblTotalRevenueDetail);
			this.Controls.Add(this.lblttrvn);
			this.Name = "frmGenerateRevenue";
			this.Text = "生成收益";
			this.Load += new System.EventHandler(this.GenerateRevenue_Load);
			this.ResumeLayout(false);

		}
		#endregion
		//loads sold car details in to ListBox
		private void GenerateRevenue_Load(object sender, System.EventArgs e)
		{

			string saleFile = "D:\\CarSaleRecord.txt";
			Hashtable objCarMasterDetails, objCarSaleDetails, profitDetails;
			double mstPurchaseRate, salepurchase, saleRate;
			string mstModelNum,saleModelNum;

			double sum = 0.00;
			double profit=0.00;
			
			try
			{
				fsSale = File.Open(saleFile,FileMode.Open,FileAccess.Read);
			}
			catch(FileNotFoundException ex)
			{
				MessageBox.Show(ex.Message.ToString()+ "尚未售出");
			}
			profitDetails = new Hashtable();
			saleReader = new BinaryReader(fsSale);

			try
			{
				while(true)
				{
					//读取存储在 salesrecord 中的所有详细信息
					saleModelNum = saleReader.ReadString();
					salepurchase = saleReader.ReadDouble();
					saleRate = saleReader.ReadDouble();
					
					//将型号和相应的利润添加到散列表中 
					//如果型号已存在，则更新利润
					if(profitDetails.ContainsKey(saleModelNum))
					{
						foreach(DictionaryEntry carprofit in profitDetails)
						{
							if(string.Compare(carprofit.Key.ToString(),saleModelNum,false)==0)
 							profit = double.Parse(carprofit.Value.ToString());
														
						}
						profitDetails.Remove(saleModelNum);
						profit += saleRate - salepurchase;
						profitDetails.Add(saleModelNum,profit);
					}
					// 如果型号不在散列表中，则将新键添加到散列表
					else
					{
						profit = saleRate - salepurchase;
						profitDetails.Add(saleModelNum,profit);
					}
					                     
				}
			}
			catch(EndOfStreamException ex)
			{
				
			}
			//遍历散列表中的所有项并将详细信息显示在列表框中
			foreach(DictionaryEntry carprofit in profitDetails)
			{
				this.lstSaleDetail.Items.Add(" ");
				this.lstSaleDetail.Items.Add(carprofit.Key.ToString()+"\t\t\t" + carprofit.Value.ToString());
				sum += double.Parse(carprofit.Value.ToString());
			}
						
			this.lblTotalRevenueDetail.Text = sum.ToString();




		}
	}
}