ASP.NET多线程编程
2015-10-09 15:34
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Thread的使用
using System;
using System.Threading;
public class ThreadExample
{
public static void ThreadProc()
{
for (int i = 0; i < 10; i++)
{
Console.WriteLine("ThreadProc: {0}", i);
Thread.Sleep(0);
}
}
public static void Main()
{
Console.WriteLine("在主进程中启动一个线程");
Thread t = new Thread(new ThreadStart(ThreadProc));//创建一个线程
t.Start();//启动线程
Thread ts = new Thread(new ThreadStart(ThreadProc));//创建一个线程
ts.Start();//启动线程
ts.Suspend();//挂起该线程
for (int i = 0; i < 4; i++)
{
Console.WriteLine("主进程输出……");
Thread.Sleep(0);//线程被阻塞的毫秒数。0表示应挂起此线程以使其他等待线程能够执行
}
Console.WriteLine("主线程调用线程Join 方法直到ThreadProc1线程结束.");
t.Join();//阻塞调用线程，直到某个线程终止时为止。
Console.WriteLine("ThreadProc1线程结束");
ts.Resume();
//ts.IsBackground = true;//后台运行
}
}
Thread中的参数传递
using System;
using System.Threading;
namespace ThreadArgs
{
public class SimpleThread
{
private string procParameter = "";
public SimpleThread (string strPara)
{
procParameter = strPara;
}
public void WorkerMethod()
{
Console.WriteLine ("参数输入为: " + procParameter);
}
}
class MainClass
{
static void Main(string[] args)
{
SimpleThread st = new SimpleThread("这是参数字符串!");
Thread t = new Thread( new ThreadStart( st.WorkerMethod ) );
t.Start ();
t.Join (Timeout.Infinite); }
}
}
Thread中委托的使用
using System;
using System.Threading;
public class SimpleThread
{
public delegate void Start (object o);
private class Args
{
public object o;
public Start s;
public void work()
{
s(o);
}
}
public static Thread CreateThread (Start s, Object arg)
{
Args a = new Args();
a.o = arg;
a.s = s;
Thread t = new Thread (new ThreadStart (a.work));
return t;
}
}
class Worker
{
public static void WorkerMethod(object o)
{
Console.WriteLine ("参数为: " + o);
}
}
public class Work
{
public static void Main()
{
Thread t = SimpleThread.CreateThread (new SimpleThread.Start(Worker.WorkerMethod), "参数字符串");
t.Start ();
t.Join (Timeout.Infinite);
}
}
线程跨越多个程序域
using System;
namespace AppDomainAndThread
{
class Class1
{
static void Main(string[] args)
{
AppDomain DomainA;
DomainA=AppDomain.CreateDomain("MyDomainA");
string StringA="DomainA Value";
DomainA.SetData("DomainKey", StringA);
CommonCallBack();
CrossAppDomainDelegate delegateA=new CrossAppDomainDelegate(CommonCallBack);
//CrossAppDomainDelegate委托：由 DoCallBack 用于跨应用程序域调用。
DomainA.DoCallBack(delegateA); //在另一个应用程序域中执行代码
}
public static void CommonCallBack()
{
AppDomain Domain;
Domain=AppDomain.CurrentDomain;
Console.WriteLine("The value'"+Domain.GetData("DomainKey")+"'was found in "+Domain.FriendlyName.ToString()+"running on thread id:"+AppDomain.GetCurrentThreadId().ToString());
}
}
}
using System;
using System.Threading;
using System.Collections;
namespace ClassMain
{ delegate string MyMethodDelegate();
class MyClass
{
private static ArrayList arrList = new ArrayList();
private static int i = 0;
public static void Add()
{
arrList.Add(i.ToString());
i++;
}
public static void LockAdd()
{
lock(arrList)
{
Add();
}
}
public static void InterlickedAdd()
{
Interlocked.Increment(ref i);
arrList.Add(i.ToString());
}
public static void MonitorLock()
{
try
{
//I.不限时间
//Monitor.Enter(arrList);
//II.在指定时间获得排他锁
if(Monitor.TryEnter(arrList,TimeSpan.FromSeconds(30)))
//在30秒内获取对象排他锁.
{
Add();
}
}
catch
{
//发生异常后自定义错误处理代码
}
finally
{
Monitor.Exit(arrList); //不管是正常还是发生错误，都得释放对象
}
}
static Thread[] threads = new Thread[10];
[STAThread]
static void Main(string[] args)
{
for(int i=0;i<3;i++)
{
Thread thread = new Thread(new ThreadStart(Add));
// Thread thread1 = new Thread(new ThreadStart(LockAdd));
// Thread thread = new Thread(new ThreadStart(InterlickedAdd));
// Thread thread = new Thread(new ThreadStart(MonitorLock));
thread.Start();
}
Console.ReadLine();
for(int i=0;i<arrList.Count;i++)
{
Console.WriteLine(arrList[i].ToString());
}
}
}
}
通过委托异步调用方法
using System;
using System.Threading;
using System.Runtime.Remoting.Messaging;
namespace ClassMain
{
//委托声明(函数签名)
delegate string MyMethodDelegate();
class MyClass
{
//要调用的动态方法
public string MyMethod1()
{
return "Hello Word1";
}
//要调用的静态方法
public static string MyMethod2()
{
return "Hello Word2";
}
}
class Class1
{
static void Main(string[] args)
{
MyClass myClass = new MyClass();
//方式1: 声明委托，调用MyMethod1
MyMethodDelegate d = new MyMethodDelegate(myClass.MyMethod1);
string strEnd = d();
Console.WriteLine(strEnd);
//方式2: 声明委托，调用MyMethod2 (使用AsyncResult对象调用)
d = new MyMethodDelegate(MyClass.MyMethod2); //定义一个委托可以供多个方法使用
AsyncResult myResult; //此类封闭异步委托异步调用的结果,通过AsyncResult得到结果.
myResult = (AsyncResult)d.BeginInvoke(null,null); //开始调用
while(!myResult.IsCompleted) //判断线程是否执行完成
{
Console.WriteLine("正在异步执行MyMethod2 .....");
}
Console.WriteLine("方法MyMethod2执行完成!");
strEnd = d.EndInvoke(myResult); //等待委托调用的方法完成，并返回结果
Console.WriteLine(strEnd);
Console.Read();
}
}
}
利用多线程实现Web进度条
private void btnDownload_Click(object sender, System.EventArgs e)
{
System.Threading.Thread thread=new System.Threading.Thread(new System.Threading.ThreadStart(LongTask));
thread.Start();
Session["State"]=1;
OpenProgressBar(this.Page);
}
public static void OpenProgressBar(System.Web.UI.Page Page)
{
StringBuilder sbScript = new StringBuilder();
sbScript.Append("<script language='JavaScript' type='text/javascript'>/n");
sbScript.Append("<!--/n");
//需要IE5.5以上支持
//sbScript.Append("window.showModalDialog('Progress.aspx','','dialogHeight: 100px; dialogWidth: 350px; edge: Raised; center: Yes; help: No; resizable: No; status: No;scroll:No;');/n");
sbScript.Append("window.open('Progress.aspx','', 'height=100, width=350, toolbar =no, menubar=no, scrollbars=no, resizable=no, location=no, status=no');/n");
sbScript.Append("// -->/n");
sbScript.Append("</script>/n");
Page.RegisterClientScriptBlock("OpenProgressBar", sbScript.ToString());
}
private void LongTask()
{
//模拟长时间任务
//每个循环模拟任务进行到不同的阶段
for(int i=0;i<11;i++)
{
System.Threading.Thread.Sleep(1000);
//设置每个阶段的state值，用来显示当前的进度
Session["State"] = i+1;
}
//任务结束
Session["State"] = 100;
}
private int state = 0;
private void Page_Load(object sender, System.EventArgs e)
{
// Put user code to initialize the page here
if(Session["State"]!=null)
{
state = Convert.ToInt32(Session["State"].ToString());
}
else
{
Session["State"]=0;
}
if(state>0&&state<=10)
{
this.lblMessages.Text = "Task undertaking!";
this.panelProgress.Width = state*30;
this.lblPercent.Text = state*10 + "%";
Page.RegisterStartupScript("","<script>window.setTimeout('window.Progress.submit()',100);</script>");
}
if(state==100)
{
this.panelProgress.Visible = false;
this.panelBarSide.Visible = false;
this.lblMessages.Text = "Task Completed!";
Page.RegisterStartupScript("","<script>window.close();</script>");
}
}
using System;
using System.Threading;
public class ThreadExample
{
public static void ThreadProc()
{
for (int i = 0; i < 10; i++)
{
Console.WriteLine("ThreadProc: {0}", i);
Thread.Sleep(0);
}
}
public static void Main()
{
Console.WriteLine("在主进程中启动一个线程");
Thread t = new Thread(new ThreadStart(ThreadProc));//创建一个线程
t.Start();//启动线程
Thread ts = new Thread(new ThreadStart(ThreadProc));//创建一个线程
ts.Start();//启动线程
ts.Suspend();//挂起该线程
for (int i = 0; i < 4; i++)
{
Console.WriteLine("主进程输出……");
Thread.Sleep(0);//线程被阻塞的毫秒数。0表示应挂起此线程以使其他等待线程能够执行
}
Console.WriteLine("主线程调用线程Join 方法直到ThreadProc1线程结束.");
t.Join();//阻塞调用线程，直到某个线程终止时为止。
Console.WriteLine("ThreadProc1线程结束");
ts.Resume();
//ts.IsBackground = true;//后台运行
}
}
Thread中的参数传递
using System;
using System.Threading;
namespace ThreadArgs
{
public class SimpleThread
{
private string procParameter = "";
public SimpleThread (string strPara)
{
procParameter = strPara;
}
public void WorkerMethod()
{
Console.WriteLine ("参数输入为: " + procParameter);
}
}
class MainClass
{
static void Main(string[] args)
{
SimpleThread st = new SimpleThread("这是参数字符串!");
Thread t = new Thread( new ThreadStart( st.WorkerMethod ) );
t.Start ();
t.Join (Timeout.Infinite); }
}
}
Thread中委托的使用
using System;
using System.Threading;
public class SimpleThread
{
public delegate void Start (object o);
private class Args
{
public object o;
public Start s;
public void work()
{
s(o);
}
}
public static Thread CreateThread (Start s, Object arg)
{
Args a = new Args();
a.o = arg;
a.s = s;
Thread t = new Thread (new ThreadStart (a.work));
return t;
}
}
class Worker
{
public static void WorkerMethod(object o)
{
Console.WriteLine ("参数为: " + o);
}
}
public class Work
{
public static void Main()
{
Thread t = SimpleThread.CreateThread (new SimpleThread.Start(Worker.WorkerMethod), "参数字符串");
t.Start ();
t.Join (Timeout.Infinite);
}
}
线程跨越多个程序域
using System;
namespace AppDomainAndThread
{
class Class1
{
static void Main(string[] args)
{
AppDomain DomainA;
DomainA=AppDomain.CreateDomain("MyDomainA");
string StringA="DomainA Value";
DomainA.SetData("DomainKey", StringA);
CommonCallBack();
CrossAppDomainDelegate delegateA=new CrossAppDomainDelegate(CommonCallBack);
//CrossAppDomainDelegate委托：由 DoCallBack 用于跨应用程序域调用。
DomainA.DoCallBack(delegateA); //在另一个应用程序域中执行代码
}
public static void CommonCallBack()
{
AppDomain Domain;
Domain=AppDomain.CurrentDomain;
Console.WriteLine("The value'"+Domain.GetData("DomainKey")+"'was found in "+Domain.FriendlyName.ToString()+"running on thread id:"+AppDomain.GetCurrentThreadId().ToString());
}
}
}
using System;
using System.Threading;
using System.Collections;
namespace ClassMain
{ delegate string MyMethodDelegate();
class MyClass
{
private static ArrayList arrList = new ArrayList();
private static int i = 0;
public static void Add()
{
arrList.Add(i.ToString());
i++;
}
public static void LockAdd()
{
lock(arrList)
{
Add();
}
}
public static void InterlickedAdd()
{
Interlocked.Increment(ref i);
arrList.Add(i.ToString());
}
public static void MonitorLock()
{
try
{
//I.不限时间
//Monitor.Enter(arrList);
//II.在指定时间获得排他锁
if(Monitor.TryEnter(arrList,TimeSpan.FromSeconds(30)))
//在30秒内获取对象排他锁.
{
Add();
}
}
catch
{
//发生异常后自定义错误处理代码
}
finally
{
Monitor.Exit(arrList); //不管是正常还是发生错误，都得释放对象
}
}
static Thread[] threads = new Thread[10];
[STAThread]
static void Main(string[] args)
{
for(int i=0;i<3;i++)
{
Thread thread = new Thread(new ThreadStart(Add));
// Thread thread1 = new Thread(new ThreadStart(LockAdd));
// Thread thread = new Thread(new ThreadStart(InterlickedAdd));
// Thread thread = new Thread(new ThreadStart(MonitorLock));
thread.Start();
}
Console.ReadLine();
for(int i=0;i<arrList.Count;i++)
{
Console.WriteLine(arrList[i].ToString());
}
}
}
}
通过委托异步调用方法
using System;
using System.Threading;
using System.Runtime.Remoting.Messaging;
namespace ClassMain
{
//委托声明(函数签名)
delegate string MyMethodDelegate();
class MyClass
{
//要调用的动态方法
public string MyMethod1()
{
return "Hello Word1";
}
//要调用的静态方法
public static string MyMethod2()
{
return "Hello Word2";
}
}
class Class1
{
static void Main(string[] args)
{
MyClass myClass = new MyClass();
//方式1: 声明委托，调用MyMethod1
MyMethodDelegate d = new MyMethodDelegate(myClass.MyMethod1);
string strEnd = d();
Console.WriteLine(strEnd);
//方式2: 声明委托，调用MyMethod2 (使用AsyncResult对象调用)
d = new MyMethodDelegate(MyClass.MyMethod2); //定义一个委托可以供多个方法使用
AsyncResult myResult; //此类封闭异步委托异步调用的结果,通过AsyncResult得到结果.
myResult = (AsyncResult)d.BeginInvoke(null,null); //开始调用
while(!myResult.IsCompleted) //判断线程是否执行完成
{
Console.WriteLine("正在异步执行MyMethod2 .....");
}
Console.WriteLine("方法MyMethod2执行完成!");
strEnd = d.EndInvoke(myResult); //等待委托调用的方法完成，并返回结果
Console.WriteLine(strEnd);
Console.Read();
}
}
}
利用多线程实现Web进度条
private void btnDownload_Click(object sender, System.EventArgs e)
{
System.Threading.Thread thread=new System.Threading.Thread(new System.Threading.ThreadStart(LongTask));
thread.Start();
Session["State"]=1;
OpenProgressBar(this.Page);
}
public static void OpenProgressBar(System.Web.UI.Page Page)
{
StringBuilder sbScript = new StringBuilder();
sbScript.Append("<script language='JavaScript' type='text/javascript'>/n");
sbScript.Append("<!--/n");
//需要IE5.5以上支持
//sbScript.Append("window.showModalDialog('Progress.aspx','','dialogHeight: 100px; dialogWidth: 350px; edge: Raised; center: Yes; help: No; resizable: No; status: No;scroll:No;');/n");
sbScript.Append("window.open('Progress.aspx','', 'height=100, width=350, toolbar =no, menubar=no, scrollbars=no, resizable=no, location=no, status=no');/n");
sbScript.Append("// -->/n");
sbScript.Append("</script>/n");
Page.RegisterClientScriptBlock("OpenProgressBar", sbScript.ToString());
}
private void LongTask()
{
//模拟长时间任务
//每个循环模拟任务进行到不同的阶段
for(int i=0;i<11;i++)
{
System.Threading.Thread.Sleep(1000);
//设置每个阶段的state值，用来显示当前的进度
Session["State"] = i+1;
}
//任务结束
Session["State"] = 100;
}
private int state = 0;
private void Page_Load(object sender, System.EventArgs e)
{
// Put user code to initialize the page here
if(Session["State"]!=null)
{
state = Convert.ToInt32(Session["State"].ToString());
}
else
{
Session["State"]=0;
}
if(state>0&&state<=10)
{
this.lblMessages.Text = "Task undertaking!";
this.panelProgress.Width = state*30;
this.lblPercent.Text = state*10 + "%";
Page.RegisterStartupScript("","<script>window.setTimeout('window.Progress.submit()',100);</script>");
}
if(state==100)
{
this.panelProgress.Visible = false;
this.panelBarSide.Visible = false;
this.lblMessages.Text = "Task Completed!";
Page.RegisterStartupScript("","<script>window.close();</script>");
}
}
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