VB.NET missing isNull()?

Question

I like to confirm that array is created, how can it be done? There is no nul keyword?

Dim items As Array = str.Split("|")
if (items=null)  then ???

Answer 1

To check if an object is null in VB.Net you need to use the Nothing keyword. e.g.

If (items is Nothing) Then
    'do stuff
End If

However string.Split() never returns null, so you should check the input string for null rather than the items array. Your code could be changed to something like:

If Not String.IsNullOrEmpty(str) Then
    Dim items As Array = str.Split("|")
    'do stuff
End If

Answer 2

Try using String.IsNullOrEmpty on your string variable before splitting it. If you attempt to split the variable with nothing in the string the array will still have one item in it (an empty string), therefore your IsNothing checks on the array will return false.