C # multithreading multi-parameter and return-value usage

1. Pass parameters to the thread

1.1 Using lambda expressions

Thread t = new Thread (() =>print ("Hello from T"));
T.start ();

This way you can make a new thread pass any argument, or even put the method into the implementation into a lambda expression.

New Thread (string name, String value) =>{console.writeline (name);
Console.WriteLine (value);}). Start ();

2. Get the thread return value

2.1 Use Task to get return value

task<string> task = task.factory.startnew<string> (() =>downloadstring ("http://ww.linqpad.net"));
Runsomeothermethod ();
String Taskresult = task. result;

<String> to indicate that this Task returns a String result value. This value is the Downloadstring () method that returns a value.

2.2 Get return value using asynchronous delegate

Func<string, int> method = Work;
IAsyncResult Cookie = method. BeginInvoke ("Test", null,null);
//
//..... Do other parallel work
//
int result = method. EndInvoke (cookie);

An asynchronous delegate can pass any number of arguments to a thread to get any number of return values. It is usually necessary to define the Func delegate, point to the method to be executed in parallel, Func the result of the delegate execution method to the IAsyncResult object, and fetch the return value through the EndInvoke method.