addcar.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 Addcar.
	/// </summary>
	public class frmAddcar : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Label lblCarModelNumber;
		private System.Windows.Forms.Label lblCarPurchaseRate;
		private System.Windows.Forms.TextBox txtCarModelNumber;
		private System.Windows.Forms.TextBox txtCarPurchaseRate;
		private System.Windows.Forms.Button btnAdd;
		private System.Windows.Forms.Button btnExit;

		private FileStream fstream;
		private BinaryWriter bwriter;
		/// <summary>
		/// Required designer variable.
		/// </summary>
		private System.ComponentModel.Container components = null;

		public frmAddcar()
		{
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();
			string filename = "D:\\CarMasterRecord.txt";
			
			fstream = File.Open(filename,FileMode.OpenOrCreate,FileAccess.ReadWrite);
			//
			// 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.lblCarModelNumber = new System.Windows.Forms.Label();
			this.lblCarPurchaseRate = new System.Windows.Forms.Label();
			this.txtCarModelNumber = new System.Windows.Forms.TextBox();
			this.txtCarPurchaseRate = new System.Windows.Forms.TextBox();
			this.btnAdd = new System.Windows.Forms.Button();
			this.btnExit = new System.Windows.Forms.Button();
			this.SuspendLayout();
			// 
			// lblCarModelNumber
			// 
			this.lblCarModelNumber.Location = new System.Drawing.Point(48, 52);
			this.lblCarModelNumber.Name = "lblCarModelNumber";
			this.lblCarModelNumber.Size = new System.Drawing.Size(125, 24);
			this.lblCarModelNumber.TabIndex = 0;
			this.lblCarModelNumber.Text = "汽车型号：";
			// 
			// lblCarPurchaseRate
			// 
			this.lblCarPurchaseRate.Location = new System.Drawing.Point(48, 103);
			this.lblCarPurchaseRate.Name = "lblCarPurchaseRate";
			this.lblCarPurchaseRate.Size = new System.Drawing.Size(125, 25);
			this.lblCarPurchaseRate.TabIndex = 1;
			this.lblCarPurchaseRate.Text = "汽车购买价格：";
			// 
			// txtCarModelNumber
			// 
			this.txtCarModelNumber.Location = new System.Drawing.Point(221, 46);
			this.txtCarModelNumber.Name = "txtCarModelNumber";
			this.txtCarModelNumber.Size = new System.Drawing.Size(120, 21);
			this.txtCarModelNumber.TabIndex = 2;
			this.txtCarModelNumber.Text = "";
			// 
			// txtCarPurchaseRate
			// 
			this.txtCarPurchaseRate.Location = new System.Drawing.Point(221, 103);
			this.txtCarPurchaseRate.Name = "txtCarPurchaseRate";
			this.txtCarPurchaseRate.Size = new System.Drawing.Size(120, 21);
			this.txtCarPurchaseRate.TabIndex = 3;
			this.txtCarPurchaseRate.Text = "";
			// 
			// btnAdd
			// 
			this.btnAdd.Location = new System.Drawing.Point(134, 172);
			this.btnAdd.Name = "btnAdd";
			this.btnAdd.Size = new System.Drawing.Size(90, 25);
			this.btnAdd.TabIndex = 4;
			this.btnAdd.Text = "添加(&A)";
			this.btnAdd.Click += new System.EventHandler(this.btnAdd_Click);
			// 
			// btnExit
			// 
			this.btnExit.Location = new System.Drawing.Point(251, 172);
			this.btnExit.Name = "btnExit";
			this.btnExit.Size = new System.Drawing.Size(90, 25);
			this.btnExit.TabIndex = 5;
			this.btnExit.Text = "退出(&E)";
			this.btnExit.Click += new System.EventHandler(this.btnExit_Click);
			// 
			// frmAddcar
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(384, 212);
			this.Controls.Add(this.btnExit);
			this.Controls.Add(this.btnAdd);
			this.Controls.Add(this.txtCarPurchaseRate);
			this.Controls.Add(this.txtCarModelNumber);
			this.Controls.Add(this.lblCarPurchaseRate);
			this.Controls.Add(this.lblCarModelNumber);
			this.Name = "frmAddcar";
			this.ShowInTaskbar = false;
			this.Text = "添加汽车";
			this.Load += new System.EventHandler(this.Addcar_Load);
			this.ResumeLayout(false);

		}
		#endregion

		private void btnAdd_Click(object sender, System.EventArgs e)
		{
			//validates empty fields
			//rate must not contain any text
			if(this.txtCarModelNumber.Text != string.Empty && this.txtCarPurchaseRate.Text != string.Empty)
			{
				
				for(int i=0; i<txtCarPurchaseRate.Text.Length; i++)
				{
					if(!Char.IsNumber(txtCarPurchaseRate.Text.ToString(),i))
					{
						MessageBox.Show("价格应为数字");
						return;
					}
				}
								
				//Write model number and purchase rate of car to file CarMasterRecord.txt
				string modelnum = this.txtCarModelNumber.Text;
				double carrate = Double.Parse(this.txtCarPurchaseRate.Text);
				bwriter.Seek(0,SeekOrigin.End);
				bwriter.Write(modelnum);
				bwriter.Write(carrate);

				MessageBox.Show("记录成功添加到文件中");
				this.txtCarModelNumber.Clear();
				this.txtCarPurchaseRate.Clear();
			
				
			}
			else
				MessageBox.Show("提供完整的数据");
		}

		private void btnExit_Click(object sender, System.EventArgs e)
		{
			fstream.Close();
			fstream.Close();
			this.Close();
		}

		private void Addcar_Load(object sender, System.EventArgs e)
		{
			bwriter = new BinaryWriter(fstream);
		}
	}
}