[RESOLVED] Lamda function at PUBLIC Declaration

[dhilip81]

how to declare Lamda function at PUBLIC with in a class




error code

Public Class ExClass

 Dim _duplicatedocumentJSC As Func(Of Boolean)
 Public Function Getvalue () as boolean
   _duplicatedocumentJSC = Function(_newName$) As Boolean
                                      ' Getting Error here  :
                                      Nested function does not have a signature that is compatible with delegate '<delegatename>'

                              End Function
 End Function

End Class 

Below code is working fine

Public Class ExClass

 Dim _duplicatedocumentJSC As Func(Of Boolean)
Public Function Getvalue () as boolean
   _duplicatedocumentJSC = Function() As Boolean
        
                               End Function
 End Function
End Class 

[techgnome]

You declared the function signature as parameterless, then tried to create the function with a parameter... so yeah, of course the signatures don't match.

 Dim _duplicatedocumentJSC As Func(Of Boolean)(somename as string)
 Public Function Getvalue () as boolean
   _duplicatedocumentJSC = Function(_newName$) As Boolean
                                      ' Getting Error here  :
                                      Nested function does not have a signature that is compatible with delegate '<delegatename>'

                              End Function
 End Function

End Class

-tg

[Joacim Andersson]

You declared the function signature as parameterless, then tried to create the function with a parameter... so yeah, of course the signatures don't match.

 Dim _duplicatedocumentJSC As Func(Of Boolean)(somename as string)

That will not work, the signature is that it takes a string and returns a boolean so it should look like this:

Private _duplicatedocumentJSC As Func(Of String, Boolean)

[techgnome]

Ugh... yeah. sorry... I had Generics on the brain when I wrote that and no chance to try it out.

-tg

[dhilip81]

yes

Private _duplicatedocumentJSC As Func(Of String, Boolean) 

it's working fine sir
thank you techgnome n Joacim Andersson.....


but i troubled the another one ...

Public Class ExClass

 Dim _duplicatedocumentJSC  As Func(Of String, Boolean)
Public Function Getvalue () as boolean
   _duplicatedocumentJSC = Function(Byval _newname$ , ByRef getlayerSize  as SizeF) As Boolean
                                      ' Getting Error here  :
                                      Nested function does not have a signature that is compatible with delegate '<delegatename>'

                                     End Function
 End Function
End Class 

m using ByRef

[Joacim Andersson]

You can't use the generic delegate Func(Of ...) if one of the arguments is to be passed ByRef you need to declare your own delegate for that.

Delegate Function MyFunc(s As String, ByRef sf As SizeF) As Boolean
Private _duplicatedocumentJSC As MyFunc

[dhilip81]

thanQ sir