C#中线程同步实验设计

来源：互联网发布：通用oa系统数据库设计编辑：程序博客网时间：2024/05/09 15:56

线程同步是我们常常遇到的问题，下面这个实验就是线程同步的例子。其功能是先让进程1执行，然后再线程1执行一会后再让线程2执行，当线程2执行完毕后，再按线程1接着执行。

在这个实验中，要用到在一个线程中操用另一个线程的控件的知识。

好了，不多说了，下面开始实验吧。

实验结果分析：

首先同时启线程1 与线程2，当线程1输出A后，我们让线程1 处于阻塞状态。让线程2开始执行。由于线程1会等待线程2执行完毕，只有线程2执行完毕后线程1才有运行的机会。但同于线程2是一个死循环，因此，我们只有手动关闭线程2后线程1才得以执行。

为了文便说明各控件的属性与功能，特将from.Desing.cs代码贴出来，如下：

namespace ProcessTest

{

partial class ThreadCoordinate

{

/// <summary>

/// 必需的设计器变量。

/// </summary>

private System.ComponentModel.IContainer components = null;

/// <summary>

/// 清理所有正在使用的资源。

/// </summary>

/// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>

protected override void Dispose(bool disposing)

{

if (disposing && (components != null))

{

components.Dispose();

}

base.Dispose(disposing);

}

#region Windows 窗体设计器生成的代码

/// <summary>

/// 设计器支持所需的方法 - 不要

/// 使用代码编辑器修改此方法的内容。

/// </summary>

private void InitializeComponent()

{

this.btnCoordinate = new System.Windows.Forms.Button();

this.btnQuit = new System.Windows.Forms.Button();

this.txtDisplay = new System.Windows.Forms.RichTextBox();

this.btnEndThread1 = new System.Windows.Forms.Button();

this.btnEndThread2 = new System.Windows.Forms.Button();

this.SuspendLayout();

// btnCoordinate

this.btnCoordinate.Location = new System.Drawing.Point(12, 275);

this.btnCoordinate.Name = "btnCoordinate";

this.btnCoordinate.Size = new System.Drawing.Size(86, 23);

this.btnCoordinate.TabIndex = 1;

this.btnCoordinate.Text = "Coordinate";

this.btnCoordinate.UseVisualStyleBackColor = true;

this.btnCoordinate.Click += new System.EventHandler(this.btnCoordinate_Click);

// btnQuit

this.btnQuit.Location = new System.Drawing.Point(309, 275);

this.btnQuit.Name = "btnQuit";

this.btnQuit.Size = new System.Drawing.Size(94, 23);

this.btnQuit.TabIndex = 2;

this.btnQuit.Text = "End Thread";

this.btnQuit.UseVisualStyleBackColor = true;

this.btnQuit.Click += new System.EventHandler(this.btnQuit_Click);

// txtDisplay

this.txtDisplay.Location = new System.Drawing.Point(12, 12);

this.txtDisplay.Name = "txtDisplay";

this.txtDisplay.Size = new System.Drawing.Size(350, 256);

this.txtDisplay.TabIndex = 3;

this.txtDisplay.Text = "";

// btnEndThread1

this.btnEndThread1.Location = new System.Drawing.Point(104, 274);

this.btnEndThread1.Name = "btnEndThread1";

this.btnEndThread1.Size = new System.Drawing.Size(104, 23);

this.btnEndThread1.TabIndex = 2;

this.btnEndThread1.Text = "End Thread1";

this.btnEndThread1.UseVisualStyleBackColor = true;

this.btnEndThread1.Click += new System.EventHandler(this.btnEndThread1_Click);

// btnEndThread2

this.btnEndThread2.Location = new System.Drawing.Point(214, 275);

this.btnEndThread2.Name = "btnEndThread2";

this.btnEndThread2.Size = new System.Drawing.Size(89, 23);

this.btnEndThread2.TabIndex = 4;

this.btnEndThread2.Text = "End Thread2";

this.btnEndThread2.UseVisualStyleBackColor = true;

this.btnEndThread2.Click += new System.EventHandler(this.btnEndThread2_Click);

// ThreadCoordinate

this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);

this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;

this.ClientSize = new System.Drawing.Size(424, 325);

this.Controls.Add(this.btnEndThread2);

this.Controls.Add(this.txtDisplay);

this.Controls.Add(this.btnEndThread1);

this.Controls.Add(this.btnQuit);

this.Controls.Add(this.btnCoordinate);

this.Name = "ThreadCoordinate";

this.Text = "ThreadCoordinate";

this.ResumeLayout(false);

}

#endregion

private System.Windows.Forms.Button btnCoordinate;

private System.Windows.Forms.Button btnQuit;

private System.Windows.Forms.RichTextBox txtDisplay;

private System.Windows.Forms.Button btnEndThread1;

private System.Windows.Forms.Button btnEndThread2;

}

对应界面如下：

程序代码如下：

public partial class ThreadCoordinate : Form

{

private Thread _thread1;

private Thread _thread2;

//in order to operator a activeX with many thread,define a delegate;

delegate void WriteContent(string str);

WriteContent temp;

/// <summary>

/// initial the class

/// </summary>

public ThreadCoordinate()

{

InitializeComponent();

temp = new WriteContent(Write);

}

/// <summary>

/// start the two thread.

/// </summary>

/// <param name="sender"></param>

/// <param name="e"></param>

private void btnCoordinate_Click(object sender, EventArgs e)

{

_thread1 = new Thread(new ThreadStart(Method1));

_thread2 = new Thread(new ThreadStart (Method2 ));

_thread1.Start();

_thread2.Start();

}

/// <summary>

/// _thread1's code

/// </summary>

private void Method1()

{

txtDisplay.Invoke(temp,"a");

_thread2.Join();

while (true)

{

Thread.Sleep(100);

txtDisplay.Invoke(temp, "C");

}

/// <summary>

/// _thread2's code

/// </summary>

private void Method2()

{

while (true)

{

Thread.Sleep(100);

txtDisplay.Invoke(temp, "b");

}

/// <summary>

/// write content to txtDisplay

/// </summary>

/// <param name="str">string that display in the txtDisplay</param>

private void Write(string str)

{

txtDisplay.Text += str;

}

/// <summary>

/// End all the thread ,include thread1 and thread2

/// </summary>

/// <param name="sender"></param>

/// <param name="e"></param>

private void btnQuit_Click(object sender, EventArgs e)

{

try

{

_thread1.Abort();

_thread1.Join();

_thread2.Abort();

_thread2.Join();

}

catch (Exception ex)

{

MessageBox.Show(ex.Message);

}

/// <summary>

/// end thread2;

/// </summary>

/// <param name="sender"></param>

/// <param name="e"></param>

private void btnEndThread2_Click(object sender, EventArgs e)

{

try

{

_thread2.Abort();

_thread2.Join();

}

catch (Exception ex)

{

MessageBox.Show(ex.Message );

}

/// <summary>

/// end thread1

/// </summary>

/// <param name="sender"></param>

/// <param name="e"></param>

private void btnEndThread1_Click(object sender, EventArgs e)

{

try

{

_thread1.Abort();

_thread1.Join();

}

catch (Exception ex)

{

MessageBox.Show(ex.Message);

}

实验结果