Checking of Alphanumeric characters in string

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Hi,
I have one string which comes as response from gateway as 'AUTH/TKT T7564B'..
I should take sub string 'T1564B' as my Transaction ID...But in some cases this sub string is just numeric characters only like 'AUTH/TKT 45286'.
Again I should convert that sub string to Integer format...I want to know How to check that sub string for Alphanumeric characters and convert it to int or else throw exception...
Please help soon.....

Thanks
Radhika K

Posted 23-Aug-12 19:46pm

Radhika Vyas

Updated 23-Aug-12 20:35pm

ridoy

v2

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3 solutions

Solution 1

Use Int32.TryParse

http://msdn.microsoft.com/en-us/library/f02979c7.aspx[^]

Posted 23-Aug-12 19:52pm

Santhosh Kumar Jayaraman

Solution 3

Regex will be better solution..check 1st link..your problem is same as it..
http://stackoverflow.com/questions/6183379/check-alphanumeric-characters-in-string-in-c-sharp[^]
http://stackoverflow.com/questions/1046740/how-to-validate-a-string-to-only-allow-alphanumeric-characters-in-it-regex[^]

Posted 23-Aug-12 20:37pm

ridoy

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Prasad_Kulkarni · Accepted Answer · 2012-08-23T20:37:00

Try thisone:

C#

public static Boolean isAlphaNumeric(string strToCheck)
{
    Regex rg = new Regex(@"^[a-zA-Z0-9\s,]*$");
    return rg.IsMatch(strToCheck);
}

It's more undestandable, if you specify in regex, what your string SHOULD contain, and not what it MUST NOT.

In the example above:

List item
^ - means start of the string
[]* - could contain any number of characters between brackets
a-zA-Z0-9 - any alphanumeric characters
\s - any space characters (space/tab/etc.)
, - commas
$ - end of the string
Found it: here[^]

Have a look at many similar threads here[^]