Should not the following return False if s="255xxxxyyy "? It seems to return
True.
Regex.IsMatch(s , "[0-9]")
--
Dennis in Houston
5  2263 
Yes, it should return false.
'-- Check for number
Regex.IsMatch(s , "^\d+$")
"Dennis" <De****@discuss ions.microsoft. com> wrote in message
news:4E******** *************** ***********@mic rosoft.com... Should not the following return False if s="255xxxxyyy "? It seems to
return
True.
Regex.IsMatch(s , "[0-9]")
--
Dennis in Houston
?Thanks for reply. Which one should return false, the one you send
(Regex.IsMatch( s, "^\d+$") or mine (Regex.IsMatch( s, "[0-9]")? Mine returns
true in VB.net 2003.
"Dr Screwup" wrote: Yes, it should return false.
'-- Check for number
Regex.IsMatch(s , "^\d+$")
"Dennis" <De****@discuss ions.microsoft. com> wrote in message
news:4E******** *************** ***********@mic rosoft.com... Should not the following return False if s="255xxxxyyy "? It seems to
return
True.
Regex.IsMatch(s , "[0-9]")
--
Dennis in Houston
Mine should be true for this: s = "1293" and false for this s= "255xxxxyyy .
Yours will return true for anything except this s="ABC" (anything without a
number).
"Dennis" <De****@discuss ions.microsoft. com> wrote in message
news:0A******** *************** ***********@mic rosoft.com... ?Thanks for reply. Which one should return false, the one you send
(Regex.IsMatch( s, "^\d+$") or mine (Regex.IsMatch( s, "[0-9]")? Mine
returns
true in VB.net 2003.
"Dr Screwup" wrote:
Yes, it should return false.
'-- Check for number
Regex.IsMatch(s , "^\d+$")
"Dennis" <De****@discuss ions.microsoft. com> wrote in message
news:4E******** *************** ***********@mic rosoft.com... > Should not the following return False if s="255xxxxyyy "? It seems to
> return
> True.
>
> Regex.IsMatch(s , "[0-9]")
> --
> Dennis in Houston
Thanks. I guess I really had it wrong. I got the Regex string from one of
the previous notes on this newsgroup.
"Dr Screwup" wrote: Mine should be true for this: s = "1293" and false for this s= "255xxxxyyy .
Yours will return true for anything except this s="ABC" (anything without a
number).
"Dennis" <De****@discuss ions.microsoft. com> wrote in message
news:0A******** *************** ***********@mic rosoft.com... ?Thanks for reply. Which one should return false, the one you send
(Regex.IsMatch( s, "^\d+$") or mine (Regex.IsMatch( s, "[0-9]")? Mine
returns
true in VB.net 2003.
"Dr Screwup" wrote:
Yes, it should return false.
'-- Check for number
Regex.IsMatch(s , "^\d+$")
"Dennis" <De****@discuss ions.microsoft. com> wrote in message
news:4E******** *************** ***********@mic rosoft.com...
> Should not the following return False if s="255xxxxyyy "? It seems to
> return
> True.
>
> Regex.IsMatch(s , "[0-9]")
> --
> Dennis in Houston
Dennis, Should not the following return False if s="255xxxxyyy "? It seems to
return
True.
Regex.IsMatch(s , "[0-9]")
If you try it, you will find it returns True, as you are looking for a
single digit 0 thru 9 anyplace in the input string. The string "255xxxxyyy "
contains 3 matches, the first 2, the first 5 & the second 5.
While: Regex.IsMatch(s , "^\d+$")
Will return false for "255xxxxyyy ", as you are looking for the beginning of
the string "^", followed by one or more digits "\d+", followed by the end of
the string "$".
For example, try the following code for both patterns:
Imports System.Text.Reg ularExpressions
Const theFirstPattern As String = "[0-9]"
Const theSecondPatter n As String = "^\d+$"
Const input As String = "255xxxxyyy "
Dim theFirstRegex As New Regex(theFirstP attern)
Debug.WriteLine (theFirstRegex. IsMatch(input), "first is match")
For Each aMatch As Match In theFirstRegex.M atches(input)
Debug.WriteLine (aMatch.Value, aMatch.Index.To String())
Next
Dim theSecondRegex As New Regex(theSecond Pattern)
Debug.WriteLine (theSecondRegex .IsMatch(input) , "second is match")
For Each aMatch As Match In theSecondRegex. Matches(input)
Debug.WriteLine (aMatch.Value, aMatch.Index.To String())
Next
The following site provides a good overview of regular expressions:
http://www.regular-expressions.info/
While this site provides the syntax specifically supported by .NET:
http://msdn.microsoft.com/library/de...geElements.asp
Hope this helps
Jay
"Dennis" <De****@discuss ions.microsoft. com> wrote in message
news:4E******** *************** ***********@mic rosoft.com... Should not the following return False if s="255xxxxyyy "? It seems to
return
True.
Regex.IsMatch(s , "[0-9]")
--
Dennis in Houston This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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