frmoperations.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.Data;
using System.Threading;

namespace Example_5
{
	/// <summary>
	/// Summary description for frmOperations.
	/// </summary>
	public class frmOperations : System.Windows.Forms.Form
	{
//		Operations objOperations;

		private System.Windows.Forms.Label lblSquare;
		private System.Windows.Forms.Label lblIncrement;
		private System.Windows.Forms.TextBox txtNumber;
		private System.Windows.Forms.Button btnIncr;
		private System.Windows.Forms.Button btnSquare;
		private System.Windows.Forms.Button btnLoop;
		private System.Windows.Forms.Label lblLoop;
		private System.Windows.Forms.Label lblNumber;
		/// <summary>
		/// Required designer variable.
		/// </summary>
		private System.ComponentModel.Container components = null;

		private int _varIncrement; 
		private int _varSquare;
		private int _varLoopValue;
		
		private System.Threading.Thread objSquare; 
		private System.Threading.Thread objIncrement; 
		private System.Threading.Thread objLoop;
		
		public frmOperations()
		{
			InitializeComponent();
		}

		/// <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.lblSquare = new System.Windows.Forms.Label();
			this.lblIncrement = new System.Windows.Forms.Label();
			this.txtNumber = new System.Windows.Forms.TextBox();
			this.btnIncr = new System.Windows.Forms.Button();
			this.btnSquare = new System.Windows.Forms.Button();
			this.lblNumber = new System.Windows.Forms.Label();
			this.btnLoop = new System.Windows.Forms.Button();
			this.lblLoop = new System.Windows.Forms.Label();
			this.SuspendLayout();
			// 
			// lblSquare
			// 
			this.lblSquare.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.lblSquare.Location = new System.Drawing.Point(144, 48);
			this.lblSquare.Name = "lblSquare";
			this.lblSquare.Size = new System.Drawing.Size(184, 23);
			this.lblSquare.TabIndex = 0;
			// 
			// lblIncrement
			// 
			this.lblIncrement.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.lblIncrement.Location = new System.Drawing.Point(144, 88);
			this.lblIncrement.Name = "lblIncrement";
			this.lblIncrement.Size = new System.Drawing.Size(184, 23);
			this.lblIncrement.TabIndex = 1;
			// 
			// txtNumber
			// 
			this.txtNumber.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.txtNumber.Location = new System.Drawing.Point(136, 16);
			this.txtNumber.Name = "txtNumber";
			this.txtNumber.Size = new System.Drawing.Size(192, 21);
			this.txtNumber.TabIndex = 3;
			this.txtNumber.Text = "";
			// 
			// btnIncr
			// 
			this.btnIncr.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.btnIncr.Location = new System.Drawing.Point(120, 200);
			this.btnIncr.Name = "btnIncr";
			this.btnIncr.Size = new System.Drawing.Size(96, 23);
			this.btnIncr.TabIndex = 4;
			this.btnIncr.Text = "增加 9 (&I)";
			this.btnIncr.Click += new System.EventHandler(this.btnIncr_Click);
			// 
			// btnSquare
			// 
			this.btnSquare.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.btnSquare.Location = new System.Drawing.Point(8, 200);
			this.btnSquare.Name = "btnSquare";
			this.btnSquare.Size = new System.Drawing.Size(96, 23);
			this.btnSquare.TabIndex = 5;
			this.btnSquare.Text = "平方(&S)";
			this.btnSquare.Click += new System.EventHandler(this.btnSquare_Click);
			// 
			// lblNumber
			// 
			this.lblNumber.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.lblNumber.Location = new System.Drawing.Point(24, 16);
			this.lblNumber.Name = "lblNumber";
			this.lblNumber.Size = new System.Drawing.Size(104, 23);
			this.lblNumber.TabIndex = 6;
			this.lblNumber.Text = "输入一个数字：";
			// 
			// btnLoop
			// 
			this.btnLoop.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.btnLoop.Location = new System.Drawing.Point(232, 200);
			this.btnLoop.Name = "btnLoop";
			this.btnLoop.Size = new System.Drawing.Size(96, 24);
			this.btnLoop.TabIndex = 7;
			this.btnLoop.Text = "执行循环(&E)";
			this.btnLoop.Click += new System.EventHandler(this.btnLoop_Click);
			// 
			// lblLoop
			// 
			this.lblLoop.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.lblLoop.Location = new System.Drawing.Point(144, 144);
			this.lblLoop.Name = "lblLoop";
			this.lblLoop.Size = new System.Drawing.Size(184, 23);
			this.lblLoop.TabIndex = 8;
			// 
			// frmOperations
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 14);
			this.ClientSize = new System.Drawing.Size(336, 237);
			this.Controls.Add(this.lblLoop);
			this.Controls.Add(this.btnLoop);
			this.Controls.Add(this.lblNumber);
			this.Controls.Add(this.btnSquare);
			this.Controls.Add(this.btnIncr);
			this.Controls.Add(this.txtNumber);
			this.Controls.Add(this.lblIncrement);
			this.Controls.Add(this.lblSquare);
			this.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.Name = "frmOperations";
			this.Text = "操作";
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new frmOperations());
		}

		private void btnSquare_Click(object sender, System.EventArgs e)
		{
			_varSquare = int.Parse(txtNumber.Text);
			// 在计算完成之前，禁用 btnSquare。
			btnSquare.Enabled = false;
			ChooseThreads(1);
		}

		private void btnIncr_Click(object sender, System.EventArgs e)
		{
			_varIncrement = int.Parse(txtNumber.Text);
			// 在计算完成之前，禁用 btnIncr。
			btnIncr.Enabled = false;
			ChooseThreads(2);
		}

		private void btnLoop_Click(object sender, System.EventArgs e)
		{
			_varLoopValue = int.Parse(txtNumber.Text);
			// 在计算完成之前，禁用 btnLoop。
			btnLoop.Enabled = false;
			ChooseThreads(3);
		
		}
		// 该方法将计算给定数字的平方。
		public void Square()
		{
			double result;
			Console.WriteLine ("运行平方线程");
			result = _varSquare * _varSquare;
			lblSquare.Text = "平方是：" + result.ToString();
			// 重新启用按钮以再次使用它。
			btnSquare.Enabled = true;
		
		}

		// 该方法将给定的数字增加 9。
		public void Increment()
		{
			int result = _varIncrement + 9;
			Console.WriteLine ("运行增加线程");
			lblIncrement.Text = "增加后的值是："+result.ToString();
			// 重新启用按钮以再次使用它。
			btnIncr.Enabled = true;
		}

		// 该方法将运行
		// 含有嵌套循环的循环 _varLoopValue 次。
		public void RunALoop()
		{
			int index;
			Console.WriteLine ("循环");
			for (index = 1; index <= _varLoopValue; index++)
			{
				Console.WriteLine("运行循环");
				//给定延迟的毫秒数
				Thread.Sleep(500); 
			}
			btnLoop.Enabled = true;
			lblLoop.Text = "循环已执行" + _varLoopValue.ToString() +"次";
		}


		public void ChooseThreads(int threadNumber)
		{
			// 根据收到的值确定要开始的线程。
			switch(threadNumber)
			{
				case 1:
					// 设置线程使用子程序的地址以便
					// 线程从该地址开始运行。
					objSquare = new System.Threading.Thread(new
						System.Threading.ThreadStart(this.Square));
					// 开始线程。
					objSquare.Start();
					break;
				case 2:
					objIncrement = new System.Threading.Thread(new
						System.Threading.ThreadStart(this.Increment));
					objIncrement.Start();
					break;
				case 3:
					objLoop = new System.Threading.Thread(new
						System.Threading.ThreadStart(this.RunALoop));
					objLoop.Start();
					break;
			}
		}
	}
	}