System.Text.RegularExpressions...

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Hi Everyone,

i want to satisfy the condition if rawValue contains text or Empty.but its give me error
Error 15 'System.Text.RegularExpressions.Regex' is a 'type' but is used like a 'variable'

C#

public static string ExtractValue(string rawValue)
        {
            if (rawValue == string.Empty || rawValue == Regex)
            {
                return null;
            }
            else
            {
                return new Regex(@"[a-zA-z\s]*").Replace(rawValue, string.Empty);
            }
        }

Please let me know why is this happen .
Thanks in Advance
Harshal

Posted 17-Aug-14 22:58pm

R Harshal

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Dilan Shaminda · Answer 1 · 2014-08-17T23:06:00

Solution 1

It is because of this line rawValue == Regex
If you want to match your rawValue matches Regex expression you can do it like this

C#

Regex rgx = new Regex(pattern, RegexOptions.IgnoreCase);
  MatchCollection matches = rgx.Matches(input);
  if (matches.Count > 0)
  {
     //code
  }

Check MSDN article about Regex Class

Posted 17-Aug-14 23:06pm

Dilan Shaminda

Updated 17-Aug-14 23:08pm

v2

Comments

R Harshal 18-Aug-14 6:12am

HI Hard-Rockz
If i found any character then it should return null.this what i want i am trying to do .
Thanks in advance

Dilan Shaminda 18-Aug-14 6:17am

As OriginalGriff suggested in below answer comment if the string is empty it doesn't contain any character. So no need to use Regex for that.

OriginalGriff · Answer 2 · 2014-08-17T23:08:00

Solution 2

Um.
Regex is a type, so you can't compare a string with it:

C#

if (rawValue == string.Empty || rawValue == Regex)
{
    return null;
}

Won't work.
instead, try starting with:

C#

if (string.IsNullOrWhiteSpace(rawValue))
{
    return null;
}

Posted 17-Aug-14 23:08pm

OriginalGriff

Comments

R Harshal 18-Aug-14 5:22am

I want to check for text.Do you have any idea for that.

R Harshal 18-Aug-14 5:26am

I have try this .
public static string ExtractValue(string rawValue)
{
if (rawValue == string.Empty || Regex(@"[a-zA-z\s]*").Replace(rawValue, null))
{
return null;
}
else
{
return new Regex(@"[a-zA-z\s]*").Replace(rawValue, string.Empty);
}
}

but still i am getting the same error.

OriginalGriff 18-Aug-14 5:47am

What exactly are you trying to do?
Because at the moment it looks like you are throwing lumps of code around without trying to think about what they do...much less how you should use them.

R Harshal 18-Aug-14 5:56am

If i found any character then it should return null.this what i want i am trying to do .
Thanks in advance

OriginalGriff 18-Aug-14 6:12am

If you want "any character" why are you trying to use a regex?
If it isn't empty then it contains a character.

R Harshal 18-Aug-14 6:17am

How to solve it for Character .
Please let me know. Regex is for other operation .

OriginalGriff 18-Aug-14 6:19am

Please read what I said:
"If it isn't empty then it contains a character."