Question

I have a array of strings and I am looping through them, but the string might be empty so I am trying this:

For Each Component As String In Components
    If Component IsNot String.Empty Then
        'Work your magic
    End If
Next

But if Component is an empty string the logic still fires. I’ve also tried

If Component <> "" Then 

End If

With the same results. So what am I missing?

Answer 1

1. Make sure that your List is of type string

2. Use the String.IsNullOrEmpty method.

   Sub Main
       Dim foo As String
       foo = "Non-Empty string"
       If Not String.IsNullOrEmpty(foo) Then
           Console.WriteLine("Foo is not empty.")
       End If
   End Sub