1.简单创建使用
usingSystem;
usingSystem.Diagnostics;
usingSystem.Threading;
usingSystem.Threading.Tasks;
namespaceConsoleapplication17
{
classPRogram
{
staticvoidMain(string[] args)
{
try
{
/*
* Task 类还提供了初始化任务但不计划执行任务的构造函数。
* 出于性能方面的考虑，TaskFactory 的 StartNew 方法应该是创建和计划计算任务的首选机制，但是对于创建和计划必须分开的情况，
* 可以使用构造函数，然后可以使用任务的 Start 方法计划任务在稍后执行。
* 对于返回值的操作，应使用 Task<TResult> 类。————MSDN
*/
Task _task =newTask(() => { Console.WriteLine("my frist Task."); });
_task.Start();
Task _taskFactory = Task.Factory.StartNew(() => { Console.WriteLine("my frist Task by Factory."); });
}
catch(Exception ex)
{
Console.WriteLine(string.Format("Exception Message:{0}", ex.Message.Trim()));
}
finally
{
Console.ReadLine();
}
}
}
}
代码效果
2.Task处理返回值
usingSystem;
usingSystem.Diagnostics;
usingSystem.Threading;
usingSystem.Threading.Tasks;
namespaceConsoleApplication17
{
classProgram
{
staticvoidMain(string[] args)
{
try
{
Task<string> _task = Task<string>.Factory.StartNew(() =>
{
string_guid = System.Guid.NewGuid().ToString();
Console.WriteLine(string.Format("Pass Value:{0}", _guid));
return_guid;
});
Console.WriteLine(string.Format("Task Return Value:{0}", _task.Result));
}
catch(Exception ex)
{
Console.WriteLine(string.Format("Exception Message:{0}", ex.Message.Trim()));
}
finally
{
Console.ReadLine();
}
}
}
}
.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp{ background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }代码效果
3.Task 任务延续
usingSystem;
usingSystem.Diagnostics;
usingSystem.Threading;
usingSystem.Threading.Tasks;
namespaceConsoleApplication17
{
classProgram
{
staticvoidMain(string[] args)
{
try
{
/*
* 使用 Task.ContinueWith 方法和 Task<TResult>.ContinueWith 方法，可以指定在前面的任务完成时要启动的任务。
* 延续任务的委托中将传入对前面的任务的引用，以便它可以检查其状态。
* 此外，可以在 Result 属性中将用户定义的值从前面的任务传递到其延续任务，
* 以便前面的任务的输出可以作为延续任务的输入。————MSDN
*/
Task<string> _task = Task<string>.Factory.StartNew(() =>
{
string_guid ="_task";
Console.WriteLine(_guid);
return_guid;
}).ContinueWith<string>((guid) =>
{
string_guid ="_task ContinueWith";
Console.WriteLine(string.Format("ContinueWith Task {0}", guid.Result));
return_guid;
});
Console.WriteLine(string.Format("Task Return Value:{0}", _task.Result));
}
catch(Exception ex)
{
Console.WriteLine(string.Format("Exception Message:{0}", ex.Message.Trim()));
}
finally
{
Console.ReadLine();
}
}
}
}
.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }代码效果
4.分离的嵌套任务
usingSystem;usingSystem.Diagnostics;usingSystem.Threading;usingSystem.Threading.Tasks;namespaceConsoleApplication17
{classProgram
{staticvoidMain(string[] args)
{try{/** 如果在任务中运行的用户代码创建一个新任务，* 且未指定 AttachedToParent 选项，则该新任务不采用任何特殊方式与外部任务同步。* 此类任务称为“分离的嵌套任务”。 ————MSDN* 说明：下面例子也来自于MSDN*其实意思就是父任务不会等待子任务*/Task _outer = Task.Factory.StartNew(() =>
{
Console.WriteLine("Outer task beginning.");
Task _child = Task.Factory.StartNew(() =>
{
Thread.SpinWait(5000000);
Console.WriteLine("Detached task completed.");
});
});
_outer.Wait();
Console.WriteLine("Outer task completed.");
}catch(Exception ex)
{
Console.WriteLine(string.Format("Exception Message:{0}", ex.Message.Trim()));
}finally{
Console.ReadLine();
}
}
}
}
.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }代码效果
5.创建子任务
usingSystem;usingSystem.Diagnostics;usingSystem.Threading;usingSystem.Threading.Tasks;namespaceConsoleApplication17
{classProgram
{staticvoidMain(string[] args)
{try{/** 如果在一个任务中运行的用户代码创建任务时指定了 AttachedToParent 选项，* 则该新任务称为原始任务的子任务，原始任务称为父任务。*因为父任务隐式地等待所有子任务完成，所以可以使用 AttachedToParent 选项表示结构化的任务并行。 ————MSDN* 说明：下面例子也来自于MSDN*其实意思就是父任务会等待子任务执行完后再结束*/Task _outer = Task.Factory.StartNew(() =>
{
Console.WriteLine("Outer task beginning.");
Task _child = Task.Factory.StartNew(() =>
{
Thread.SpinWait(5000000);
Console.WriteLine("Detached task completed.");
},TaskCreationOptions.AttachedToParent);
});
_outer.Wait();
Console.WriteLine("Outer task completed.");
}catch(Exception ex)
{
Console.WriteLine(string.Format("Exception Message:{0}", ex.Message.Trim()));
}finally{
Console.ReadLine();
}
}
}
}
.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }代码效果