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This article mainly introduces "what is the method of extracting Thread return value from .NET". In daily operation, I believe that many people have doubts about the method of extracting Thread return value from .NET. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful for you to answer the question of "what is the method of extracting Thread return value from .NET"! Next, please follow the editor to study!

I. NET 2.0 +

You can use the Thread object directly, and then you can use the closure (declare the variable and capture it in lambda), refer to the following code:

Object result = null;Thread thread = new System.Threading.Thread (() = > {/ / Some work... Result = 42;}); thread.Start (); thread.Join (); Console.WriteLine (result)

You can also use IAsyncResult and then get the return value in the EndInvoke () method.

BackgroundWorker worker = new BackgroundWorker (); worker.DoWork + = (s, e) = > {/ / Some work... E.Result = 42;}; worker.RunWorkerCompleted + = (s, e) = > {/ / e.Result "returned" from thread Console.WriteLine (e.Result);}; worker.RunWorkerAsync (); BackgroundWorker worker = new BackgroundWorker (); worker.DoWork + = (s, e) = > {/ / Some work... E.Result = 42;}; worker.RunWorkerCompleted + = (s, e) = > {/ / e.Result "returned" from thread Console.WriteLine (e.Result);}; worker.RunWorkerAsync ()

You can also use traditional BackgroundWorker and then capture it in the RunWorkerCompleted event.

2. NET 4.0 +

Starting with .NET 4.0, you can open Thread through Task. If you want to get the return value, you can extract the Result from Task.

The code is as follows:

/ / Main thread will be blocked until task thread finishes// (because of obtaining the value of the Result property) int result = Task.Factory.StartNew () = > {/ / Some work... Return 42;}) .Result; III, .NET 4.5 +

Starting with .NET 4.5, you can use await,async to replace the Result property of Task, as shown in the following code:

Int result = await Task.Run (() = > {/ / Some work... Return 42;})

Suggestion: replace what traditional Thread does with Task.

At this point, the study on "what is the method for .NET to extract the return value of Thread" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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