CODEWITHSUNDEEP
c#silverlight
dev
dev

Reputation: 35

How to pass Callback in c#?

When i call a async function from third party library then i found that the function need to pass the callback.

the function is

Library.getResult(object options, Action<library.libresult<dataCollection>>  callback

can someone tell me how i can pass callback to this function in silverlight.

thanks

Upvotes: 2

Views: 224

Answers (2)

Guffa
Guffa

Reputation: 700152

You use a delegate for method that accepts the result. You can for example use a lambda expression to create that:

Library.getResult(options, result => {
  // code here runs when the result arrives
});

You can also declare a named method:

private void HandleResult(library.libresult<dataCollection> result) {
  //...
}

Then just use its name in the call, which will automatically create a delegate for it:

Library.getResult(options, HandleResult);

Upvotes: 3

Marc Gravell
Marc Gravell

Reputation: 1062520

An Action<library.libresult<dataCollection>> is a method that takes a library.libresult<dataCollection>, so the following should work:

Library.getResult(options, result => {
     // do something with result
});

Here, result will be the library.libresult<dataCollection> it gives you back. Presumably (but not for certain) this is async, so you may need to consider the threading issues etc.

Upvotes: 2

Related Questions