Delegates with creation time arguments?

  • Thread starter Thread starter chelrw
  • Start date Start date
C

chelrw

The pattern supported by C# for delegates seems to be:

new Delegate(CallbackFunction)
Delegate.Invoke(arg1, arg2)
Callbackfunction(arg1,arg2) is invoked

What is the simplest way to get the pattern:

new Delegate(CallbackFunction, arg1)
Delegate.Invoke(arg2, arg3)
Callbackfunction(arg1,arg2,arg3) is invoked

I would have tried inheriting from Delegate an adding a new
constructor etc. but the class is sealed??

thanks,

r
 
The pattern supported by C# for delegates seems to be:

new Delegate(CallbackFunction)
Delegate.Invoke(arg1, arg2)
Callbackfunction(arg1,arg2) is invoked

What is the simplest way to get the pattern:

new Delegate(CallbackFunction, arg1)
Delegate.Invoke(arg2, arg3)
Callbackfunction(arg1,arg2,arg3) is invoked
Click to expand...

You have to use a wrapper function. A delegate by itself can only bind
a single argument in the called method (normally "this", though for a
static method you can also bind the first argument of that). For what
you want, use lambdas or anonymous delegates:

(arg2, arg3) => CallbackFunction(arg1value, arg2, arg3);
 
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