How to divide a string with multiple delimeter, but delimeter is keep include into the array? (VB.NET)

Question

I have a string:

string = "Hello.world, have a nice day"

Is there a way to split the string with point or comma as delimeter, but only retain the delimeter into the array? (whitespace is separator but is not retain)

['Hello','.','world',',','have','a','nice','day']

which delimeter for regex.split(delimeter) would be preferable?

and this is my code

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click Dim arr As String() = Regex.Split(TextBox1.Text, "[.|\,]") For Each i As String In arr Console.WriteLine(i) Next End Sub

sorry for bad english

Answer 1

If you want to split by a dot or a comma, you can update your character class to [.,] because the character class would match any of the listed characters.

The character class [.|\,] can for example also be written as [.,|] and note that you don't have to escape the comma .

The use a capture group to keep the delimiters.

Your final pattern would look like ([.,])

See the vb.net demo

For example:

Dim s As String = "Hello.world, have a nice day"
Dim arr As String() = Regex.Split(s, "([.,])")
For Each i As String In arr
    Console.WriteLine(i)
Next

Result:

Hello
.
world
,
 have a nice day