GetConstructor returning nothing

Question

I have two different GetConstructors(), one is returning what it should be returning the other however is returning nothing.

ItemName is BSRPTReportPerformanceSubcontractorRating

The first one which is returning what it properly should is:

Shared Function Invoke(ByVal Page As FXWBPage, ByVal ItemName As String, ByVal intFolderID As Integer, ByVal strItemID As String, ByVal strDummy As String) As BSRPTPrint
        Dim objPrint As BSRPTPrint

    Dim objConstructor As System.Reflection.ConstructorInfo
    Dim objType As Type
    Dim strType As String = "FXWB.BSRPT" & ItemName
    Dim types() As Type = {GetType(FXWBPage), GetType(Integer), GetType(String)}
    Dim args() As Object = {Page, intFolderID, strItemID}

    Try
        Try
            objType = Type.GetType(strType, True)
        Catch ex As Exception
            Throw New Exception("Cannot reflect type """ & strType & """. Check Request parameter ""PrintItem"", it must take the name of correspondig BSRPT class without BSRPT prefix", ex)
        End Try

        objConstructor = objType.GetConstructor(types)

        If objConstructor Is Nothing Then
            Throw New Exception("Cannot invoke type """ & objType.ToString() & """. Check constructor parameter, it must be of FXWBPage type and not passed by ref.")
        End If

        Try
            objPrint = objConstructor.Invoke(args)
        Catch exep As Exception
            Throw New Exception("Cannot load report """ & strType & """. Error: " & exep.Message)
        End Try

        Try
            objPrint.DataBind()
        Catch ex As Exception
            Throw New Exception("Error occured on data binding level. Report """ & strType & """.", ex)
        End Try

    Catch ex As Exception

        Throw ex

    End Try


    Return objPrint
End Function

The second which is returning Nothing is:

Shared Function Invoke(ByVal Page As FXWBPage, ByVal ItemName As String, ByVal intFolderID As Integer, ByVal intProjectID As Integer, ByVal strDummy As String, ByVal intSubcontractorID As Integer) As BSRPTPrint
    Dim objPrint As BSRPTPrint


    Dim objConstructor As System.Reflection.ConstructorInfo
    Dim objType As Type
    Dim strType As String = "FXWB.BSRPT" & ItemName
    Dim types() As Type = {GetType(FXWBPage), GetType(Integer), GetType(Integer), GetType(String), GetType(Integer)}
    Dim args() As Object = {Page, intFolderID, intProjectID, intSubcontractorID}

    Try
        Try
            objType = Type.GetType(strType, True)
        Catch ex As Exception
            Throw New Exception("Cannot reflect type """ & strType & """. Check Request parameter ""PrintItem"", it must take the name of correspondig BSRPT class without BSRPT prefix", ex)
        End Try

        objConstructor = objType.GetConstructor(types)

        If objConstructor Is Nothing Then
            Throw New Exception("Cannot invoke type """ & objType.ToString() & """. Check constructor parameter, it must be of FXWBPage type and not passed by ref.")
        End If

        Try
            objPrint = objConstructor.Invoke(args)
        Catch exep As Exception
            Throw New Exception("Cannot load report """ & strType & """. Error: " & exep.Message)
        End Try

        Try
            objPrint.DataBind()
        Catch ex As Exception
            Throw New Exception("Error occured on data binding level. Report """ & strType & """.", ex)
        End Try

    Catch ex As Exception

        Throw ex

    End Try


    Return objPrint
End Function

Can anyone help me understand why the first one is working and the second one is returning nothing.

Answer 1

Moved from comments:

I see from your updated code that "FXWB.BSRPT" & ItemName is not your class but rather some third-party component, right? Then you should consult docs on this component or contact its author for getting information why your code is not working.

Answer 2

It looks like you have another argument in args(), have you verified that the types of the variables you have there match up, and there is actually a constructor which takes those 4 args?