How to append String content to array

Question

I already make the code but there's a problem. The compiler show me this message:

Object reference not set to an instance of an object. This is the code:

Dim array As List(Of String)
For Each row As DataGridViewRow In DataGridView1.Rows
        If Not row.IsNewRow Then
            array.Add(row.Cells(0).Value.ToString & "," & row.Cells(1).Value.ToString & _
                            row.Cells(2).Value.ToString & "," & row.Cells(3).Value.ToString)
        End If
    Next

The line with the problem is array.add

What's the problem?

You didn't instantiate the List. Change `Dim array As List(Of String)` to `Dim array As New List(Of String)`. Horrible variable name by the way... — Idle_Mind, Dec 17 '14 at 19:22
Or try using Dim Array As New ArrayList(). Then use array.add() — Dman, Dec 17 '14 at 21:27

score 0 · Accepted Answer · answered Dec 17 '14 at 23:50

0

When you use a list, you have to create an instance of it using New:

Dim array As New List(Of String)

Like Idle_Mind mentioned, it's a bad idea to use Array as a variable name. It's confusing and makes the code hard to read.

answered Dec 17 '14 at 23:50

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How to append String content to array

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