I need to create an array of string arrays. Example:
> Array(0) = {"1", "a", "e"}
> Array(1) = {"word", "at", "war"}
> ...
I did:
Dim array()() As String
For i = 0 to 10
array(i) = New String() {"dfdd", "dda", "aa", "bnb", "3", "ghj", "ht"}
Next i
But it fails with the exception:
Object reference not set to an instance of an object.
It's because the first dimension of your array was not initialized.
Dim array(10)() As String
For i = 0 To 10
array(i) = New String() {"dfdd", "dda", "aa", "bnb", "3", "ghj", "ht"}
Next I
I would suggest you look at List and maybe create a class instead if each string determine a different property.
I think that a List(Of String()) would suit your needs better here:
Dim arrays as New List(Of String())
For i = 0 to 10
arrays.Add(New String() {"dfdd", "dda", "aa", "bnb", "3", "ghj", "ht"})
Next i
A List will automatically expand to hold as many arrays as you need. Then, if you still want an array of arrays, you can always do:
arrays.ToArray()
Here's a fiddle. Also, see this answer to a similar question about byte arrays.
You can always do it this way:
Dim array = Enumerable _
.Range(0, 10) _
.Select(Function (n) New String() {"dfdd", "dda", "aa", "bnb", "3", "ghj", "ht"}) _
.ToArray()
Public Function ArrayToSV(ByVal array() As Object, ByVal seperator As Char) As String
Dim i As Integer
Dim tmpstr As String
tmpstr = CStr(array(LBound(array)))
For i = LBound(array) + 1 To UBound(array)
tmpstr = tmpstr & seperator & CStr(array(i))
Next
Return tmpstr
End Function
This method will give you the desired result, provide a Object Array and Separator it will return a string.
New String() {...}inside the loop, but the "parent" array is not initialized.Dim array As String()() = New String(10)() {}