regex question

[bezaman]

i have a string (the letters will never be in the same order):

TFTADFDAAFDADADDAFFDTFFTDFTFTDTTAFDAFADTAAATFDTADAFFTFTDDFDAFFTAT

1) i know it is always going to 65 characters (no numbers)
2) it will only have the letters ADFT

i want to loop through each row of data and check if the data contains this.

System.Text.RegularExpressions.Regex.IsMatch()

is this possible? if so, i need some help writing the expression.

[.paul.]

Dim testStr As String = "TFTADFDAAFDADADDAFFDTFFTDFTFTDTTAFDAFADTAAATFDTADAFFTFTDDFDAFFTAT"
 
Dim rx As New Regex("(A|D|F|T)+")
MsgBox(rx.Match(testStr).Length)

[.paul.]

how was that? does that work ok for you?

all it does is test for those 4 characters + then shows the match length in the msgbox (which should always be 65).

[gep13]

Hey,

What about something like this:

        If Regex.IsMatch(inputString, "[ADFT]{65,}") Then
            MessageBox.Show("Match")
        Else
            MessageBox.Show("No Match")
        End If

It will obviously match if there is something either side of the string as well, but should give the OP what he wants.

Gary

[bezaman]

both seem to work.
i like gep13 suggestion because that is exactly how i would be checking the string for a match.

what does the comma after the 65 mean?

[gep13]

It is possible to specify a range of matches, i.e. match any number between x and y. i.e. [ADFT]{65,100}, would match any number of characters between 65 and 100. The fact that there is nothing after the comma means it will match exactly 65.

Gary