Splitting a String into Pairs - vb.net

Question

How would I go on splitting a string into pairs of letter in VB?
for example: abcdefgh
split into: ab cd ef gh

Answer 1

I'll throw my hat in the ring:
Dim test As String = "abcdefgh"
Dim results As New List(Of String)
For i As Integer = 0 To test.Length - 1 Step 2
If i + 1 < test.Length Then
results.Add(test.Substring(i, 2))
Else
results.Add(test.Substring(i))
End If
Next
MessageBox.Show(String.Join(" ", results.ToArray))

Answer 2

The following allows for odd length strings. If the string is zero-length, I'm not sure what you'd want to do, you'll want to address that case.
Dim src As String = "abcdef"
Dim size As Integer
If src.Length > 0 Then
If src.Length Mod 2 = 0 Then
size = (src.Length / 2) - 1
Else
size = ((src.Length + 1) / 2) - 1
End If
Dim result(size) As String
For i = 0 To src.Length - 1 Step 2
If i = src.Length - 1 Then
result(i / 2) = src.Substring(i, 1)
Else
result(i / 2) = src.Substring(i, 2)
End If
Next
End If

Answer 3

In C# you would do like this:
Dictionary<String, String> Split(String input)
{
if (input.Count % 2 == 0)
{
Dictionary<string, string> Pairs = new Dictionary( );
for (int L = 0, R = 1; L < input.Count && R <= input.Count; ++L, ++R)
{
Char
Left = input[L],
Right = input[R];
Pairs.Add(
Left.ToString(),
Right.ToString());
}
}
else
{
throw new NotEvenException( );
}
return Pairs( );
}
void Main()
{
var Pairs = Split("ABCDEFGH");
foreach(string Key in Split("ABCDEFGH"))
{
Console.Write("{0}{1}\n", Key, Pairs[Key]);
}
}
/*
Output:
AB
CD
EF
GH
*/
Now, I know what you think: This isn't what I want! But I say: It is actually, at least partly.
Since I presume you're working in VB.net, the basic structure of what you want performed is outlined in the short snippet above.
For example: The method Count (of the object String) exists in both C# and in VB.
Hope it helps a bit at least!