Question

I have a list of Column custom class objects.

Column class has a Position property.

Each column in the list has a different position (currently 1, 2, 3, 4)

I want to find the rightmost column throgh a Max on the Position property:

Enumerable.Max(Of ExcelColumn)(Me.Columns, Function(c) c.Position)

or

Me.Columns.Max(Function(c) c.Position)

Both always return 0, don’t understand why. Any ideas?

Answer 1

For example:

Class Column
    Public Property Position As Int32
End Class

Dim columns As New List(Of Column) From {
    New Column With {.Position = 1}, New Column With {.Position = 2}, New Column With {.Position = 3}, New Column With {.Position = 4}
}
Dim maxColPos As Int32 = columns.Max(Function(c) c.Position)

Console.Write(maxColPos) ' will output 4

By the way, this will return repeating zeros and hence maxColPos=0:

Dim columns As New List(Of Column) From {
    New Column, New Column, New Column, New Column
}

becaue 0 is the default value for an unitialized Int32 field.