I want to add to the hashtable only when there is NOT a match. How do I apply NOT to the following code?


foreach(Match in Regex.Matches(string)){
  if(Hashtable.ContainsValue(Match)){
    Hashtable.Add(int++, Match.ToString());
  }
}

if (! Hashtable.ContainsValue(Match))

Hal Levy
I am here to help you, not do it for you.
That is, unless you hire me. I am looking for work.

I've already tried that. In my testing, I have two lines of data, the second line is a copy of the first. At runtime, the program shows both lines.

Also... do you know of a comprehensive online source for regular expressions?

I don't have a comprehsensive online source for Regular Expressions, but I'll be a little self-serving and suggest you look at our very comprehesive "Beginning Regular Expressions" book:
http://www.wrox.com/WileyCDA/WroxTit...764574892.html

It covers reg ex in VB.NET, C#, and many other languages and tools.

Jim Minatel
Senior Acquisitions Editor
Wiley Technology Publishing
WROX Press
Blog: http://wroxblog.typepad.com/
Jim's Book of the week: Beginning SQL

• http://msdn.microsoft.com/library/de...l/regexnet.asp
• http://www.regular-expressions.info/

_____________
Mehdi.
software student.

Scott,

It looks to me that you are adding the string representation of Match to the Hashtable yet you are passing the object Match to ContainsValue for comparison. So it is basically comparing an object to a string value. They will never be equal. I am not set up to test this right now, but try this,

foreach(Match in Regex.Matches(string)){
  if(!Hashtable.ContainsValue(Match.ToString())){
    Hashtable.Add(int++, Match.ToString());
  }
}

Let me know if it Works

Bilal

use HashTable ContainsValue

check this

http://vb.net-informations.com/colle..._HashTable.htm

thanks.