Android Question Result codes from functions

[Ted Fines]

All of the examples of File.Copy I've seen don't check for a result code, to see if it actually worked.

Is something like the following valid? Or do you always embed it in a Try..Catch? Or is there something like $? that can be evaluated?

If File.Copy(a,b,c,d) = True then
' successful action
else
' failure action
end if

 

[LucaMs]

File.Copy is not a function, it is a method.

You can, as you wrote, use the Try-Catch block or check if File.Exists.

File.Copy(a,b,c,d)
If File.Exists(c, d) Then

 

[Erel]

File.Copy is unlikely to fail if the source file exists.

If you think that it might fail then you should catch the error with Try / Catch.

It shouldn't be possible that File.Copy will not throw an exception and the target file will not exist. You don't need to check it.