c# - How to get the parameters passed to the asynchronous method in the callback (not lambda) -


possible duplicate:
how parameters passed asynchronous method in callback

i need convert lambda method callback

var sendregistrationdelegate =     new asyncsendregistrationdelegate(asyncsendregistrationmethod);  sendregistrationdelegate.begininvoke(registrationtouser, label, ar => {     var responcefromserver = sendregistrationdelegate.endinvoke(ar);      if (responcefromserver.iserror)     {         settext(label, registrationtouser.name + @" " +             responcefromserver.errormessage);     }     else     {         settext(label, registrationtouser.name + @" " +             responcefromserver.data);     } }, null);

first, have grasp on lambdas , anonymous delegates?

in snippet: 

    sendregistrationdelegate.begininvoke(registrationtouser, label, ar =>     // start of method     {         var responcefromserver = sendregistrationdelegate.endinvoke(ar);          if (responcefromserver.iserror)         {             settext(label, registrationtouser.name + @" " +                 responcefromserver.errormessage);         }         else         {             settext(label, registrationtouser.name + @" " +                 responcefromserver.data);         }     }    // end of method      , null);

...the opening , closing { } mark beginning , ending of method, so:

void asynccallbackmethod(iasyncresult ar) {     // method body }

your begininvoke method like:

sendregistrationdelegate.begininvoke(registrationtouser, label, new asynccallback(asynccallbackmethod), null);

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