Error : value of type 'long' cannot be converted to 'integer'.

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In this code that the conversion of the long is not converted in to the long so please help to solve this the error position is shown in the bold character .

VB.NET

Public Function GetFacetCount(reader As IndexReader, queryFilterOnMainQuery As Filter) As Int32
           Dim bs = GetValueBitset(reader)
           bs.InPlaceAnd(queryFilterOnMainQuery.GetDocIdSet(reader).Iterator())
           If DirectCast(bs.Cardinality(), Int32) >= 1 Then
               Return DirectCast(bs.Cardinality(), Int32)
           Else

               Return 0
           End If
       End Function
   End Class

What I have tried:

Dim bs = GetValueBitset(reader)
bs.InPlaceAnd(queryFilterOnMainQuery.GetDocIdSet(reader).Iterator())
Dim Cardinality As Integer = Convert.ToInt32(bs.Cardinality())
If Cardinality >= 1 Then
Return Cardinality
End If

Posted 18-Feb-16 22:53pm

Member 11835578

Updated 18-Feb-16 23:29pm

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E.F. Nijboer · Answer 1 · 2016-02-18T23:29:00

What is the return type of bs.Cardinality()? I assume a Long?

Because you would then be narrowing the value (from 64bit to 32bit) you need to use CType (see link). Also, you must ensure that the Long value doesn't overflow the Integer value after narrowing because it would still fail otherwise.

CType Function (Visual Basic)[^]

Above would maybe "fix" it, but... You need to ask yourself why you try to force the result type in a possible incompatible type? If the result of the function is a Long, why not store and use it as a Long? The person who created the function returns a Long value probably because the value could be very large. Because you simply check if the value is larger or equal to one you can easily use a Long or whatever the result type is without any problems. You should only use narrowing or widening if absolutely necessary.

Good luck!

Member 11712753 · Answer 2 · 2016-02-18T23:21:00

Solution 1

Have you tried to use

VB

Return CInt(bs.Cardinality())

to do the Type conversion in VB??

Ref.: Type Conversion Functions (Visual Basic)[^]

Posted 18-Feb-16 23:21pm

Member 11712753