C#如何进行多线程编程
由于多线程编程非常复杂，这个小例子只能算是一个入门线的知识点吧
首先建一个应用程序项目，命名为ThreadExample，在窗体上放一个文本框(textBox1) ，一个标签(lblResult)，再放两个按钮，分别命名为btnStart、btnStop。
窗体代码：
namespace
ThreadExample
{
partial
class
ThreadExample
{
/**/
///
<summary>
///
Required designer variable.
///
</summary>
private
System.ComponentModel.IContainer components
=
null
;
/**/
///
<summary>
///
Clean up any resources being used.
///
</summary>
///
<param name="disposing">
true if managed resources should be disposed; otherwise, false.
</param>
protected
override
void
Dispose(
bool
disposing)
{
if
(disposing
&&
(components
!=
null
))
{
components.Dispose();
}
base
.Dispose(disposing);
}
Windows Form Designer generated code
#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
.btnStart
=
new
System.Windows.Forms.Button();
this
.btnStop
=
new
System.Windows.Forms.Button();
this
.button1
=
new
System.Windows.Forms.Button();
this
.textBox1
=
new
System.Windows.Forms.TextBox();
this
.lblResult
=
new
System.Windows.Forms.Label();
this
.SuspendLayout();
//
//
btnStart
//
this
.btnStart.Location
=
new
System.Drawing.Point(
14
,
38
);
this
.btnStart.Name
=
"
btnStart
"
;
this
.btnStart.Size
=
new
System.Drawing.Size(
75
,
23
);
this
.btnStart.TabIndex
=
0
;
this
.btnStart.Text
=
"
启动
"
;
this
.btnStart.Click
+=
new
System.EventHandler(
this
.btnStart_Click);
//
//
btnStop
//
this
.btnStop.Location
=
new
System.Drawing.Point(
14
,
68
);
this
.btnStop.Name
=
"
btnStop
"
;
this
.btnStop.Size
=
new
System.Drawing.Size(
75
,
23
);
this
.btnStop.TabIndex
=
1
;
this
.btnStop.Text
=
"
停止
"
;
this
.btnStop.Click
+=
new
System.EventHandler(
this
.btnStop_Click);
//
//
button1
//
this
.button1.Location
=
new
System.Drawing.Point(
14
,
97
);
this
.button1.Name
=
"
button1
"
;
this
.button1.Size
=
new
System.Drawing.Size(
75
,
23
);
this
.button1.TabIndex
=
3
;
this
.button1.Text
=
"
关闭
"
;
this
.button1.Click
+=
new
System.EventHandler(
this
.button1_Click);
//
//
textBox1
//
this
.textBox1.Location
=
new
System.Drawing.Point(
14
,
11
);
this
.textBox1.Name
=
"
textBox1
"
;
this
.textBox1.Size
=
new
System.Drawing.Size(
75
,
21
);
this
.textBox1.TabIndex
=
4
;
this
.textBox1.Text
=
"
200
"
;
//
//
lblResult
//
this
.lblResult.AutoSize
=
true
;
this
.lblResult.Location
=
new
System.Drawing.Point(
12
,
139
);
this
.lblResult.Name
=
"
lblResult
"
;
this
.lblResult.Size
=
new
System.Drawing.Size(
23
,
12
);
this
.lblResult.TabIndex
=
5
;
this
.lblResult.Text
=
"
0/0
"
;
//
//
ThreadExample
//
this
.AutoScaleDimensions
=
new
System.Drawing.SizeF(6F, 12F);
this
.AutoScaleMode
=
System.Windows.Forms.AutoScaleMode.Font;
this
.ClientSize
=
new
System.Drawing.Size(
104
,
164
);
this
.Controls.Add(
this
.lblResult);
this
.Controls.Add(
this
.textBox1);
this
.Controls.Add(
this
.button1);
this
.Controls.Add(
this
.btnStop);
this
.Controls.Add(
this
.btnStart);
this
.Name
=
"
ThreadExample
"
;
this
.Text
=
"
Form1
"
;
this
.ResumeLayout(
false
);
this
.PerformLayout();
}
#endregion
private
System.Windows.Forms.Button btnStart;
private
System.Windows.Forms.Button btnStop;
private
System.Windows.Forms.Button button1;
private
System.Windows.Forms.TextBox textBox1;
private
System.Windows.Forms.Label lblResult;
}
}
程序代码：
using
System;
using
System.Collections.Generic;
using
System.ComponentModel;
using
System.Data;
using
System.Drawing;
using
System.Text;
using
System.Windows.Forms;
using
System.Threading;
namespace
ThreadExample
{
public
partial
class
ThreadExample : Form
{
//
声明一个线程
private
Thread timerThread;
//
声明一个变量,用来存储label值
int
count, i
=
0
;
public
ThreadExample()
{
InitializeComponent();
}
//
把label的值加1;
public
void
AddData()
{
//
显示lable的值
if
(i
==
count)
i
=
0
;
this
.lblResult.Text
=
i.ToString()
+
"
/
"
+
count.ToString();
i
++
;
}
//
更新线程
public
void
UpdataThread()
{
try
{
//
在对控件的调用方法进行调用时,或需要一个简单委托又不想自己定义时可以使用该委托。
MethodInvoker mi
=
new
MethodInvoker(
this
.AddData);
while
(
true
)
{
//
在创建控件的基础句柄所在线程上异步执行指定的委托
this
.BeginInvoke(mi);
Thread.Sleep(
50
);
}
}
catch
(ThreadInterruptedException)
{
//
针对具体问题定制异常抛出显示
}
finally
{
//
做一些处理
}
}
//
启动线程
public
void
StartThread()
{
StopThread();
timerThread
=
new
Thread(
new
ThreadStart(UpdataThread));
//
获取或设置一个值，该值指示某个线程是否为后台线程。
timerThread.IsBackground
=
true
;
timerThread.Start();
}
//
停止线程
public
void
StopThread()
{
if
(timerThread
!=
null
)
{
//
中断线程
timerThread.Interrupt();
timerThread
=
null
;
}
}
//
启动线程,显示结果
private
void
btnStart_Click(
object
sender, EventArgs e)
{
//
调用线程启动函数
count
=
int
.Parse(textBox1.Text);
this
.StartThread();
}
//
停止线程
private
void
btnStop_Click(
object
sender, EventArgs e)
{
//
调用线程停止函数
this
.StopThread();
}
}
}
编译后，运行，在文本框中输入200，点击开始按钮，标签为动态增长，点击停止可以暫停程序的执行。
