本文整理汇总了C#中System.Threading.Tasks.TaskExtensions.Unwrap方法的典型用法代码示例。如果您正苦于以下问题：C# TaskExtensions.Unwrap方法的具体用法？C# TaskExtensions.Unwrap怎么用？C# TaskExtensions.Unwrap使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。
在下文中一共展示了TaskExtensions.Unwrap方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: Main
//引入命名空间
using System;
using System.Diagnostics;
using System.Threading;
using System.Threading.Tasks;
class UnWrapDemo
{
// Demonstrated features:
// Task.Unwrap()
// Task.Factory.StartNew()
// Task.ContinueWith()
// Expected results:
// Indicates that continuation chains can be set up virtually instantaneously using Unwrap(), and then left to run on their own.
// The results of the RemoteIncrement(0) chain and the RemoteIncrement(4) chain may be intermixed with each other.
// The results of the sequence that starts with RemoteIncrement(4) are in strict order.
// Documentation:
// http://msdn.microsoft.com/library/dd781129(VS.100).aspx
// More information:
// http://blogs.msdn.com/pfxteam/archive/2009/11/04/9917581.aspx
// Other notes:
// The combination of Task<T>, ContinueWith() and Unwrap() can be particularly useful for setting up a chain of long-running
// tasks where each task uses the results of its predecessor.
static void Main()
{
// Invoking individual tasks is straightforward
Task<int> t1 = RemoteIncrement(0);
Console.WriteLine("Started RemoteIncrement(0)");
// Chain together the results of (simulated) remote operations.
// The use of Unwrap() instead of .Result below prevents this thread from blocking while setting up this continuation chain.
Task<int> t2 = RemoteIncrement(4)
.ContinueWith(t => RemoteIncrement(t.Result)) // RemoteIncrement() returns Task<int> so no unwrapping is needed for the first continuation.
.Unwrap().ContinueWith(t => RemoteIncrement(t.Result)) // ContinueWith() returns Task<Task<int>>. Therefore unwrapping is needed.
.Unwrap().ContinueWith(t => RemoteIncrement(t.Result)) // and on it goes...
.Unwrap();
Console.WriteLine("Started RemoteIncrement(...(RemoteIncrement(RemoteIncrement(4))...)");
try
{
t1.Wait();
Console.WriteLine("Finished RemoteIncrement(0)\n");
t2.Wait();
Console.WriteLine("Finished RemoteIncrement(...(RemoteIncrement(RemoteIncrement(4))...)");
}
catch (AggregateException e)
{
Console.WriteLine("A task has thrown the following (unexpected) exception:\n{0}", e);
}
}
// This method represents a remote API.
static Task<int> RemoteIncrement(int n)
{
return Task<int>.Factory.StartNew(
(obj) =>
{
// Simulate a slow operation
Thread.Sleep(1 * 1000);
int x = (int)obj;
Console.WriteLine("Thread={0}, Next={1}", Thread.CurrentThread.ManagedThreadId, ++x);
return x;
},
n);
}
}