Dynamically parsing substrings out of strings

Question

2.50/5 (2 votes)

See more:

Hi All,
I have a following string,

string strVal = "WHEN table.column1 = 'ABC' AND table.column2 = 'xyz' AND table.column3 IN ( 'pqr','NON' )  THEN 'Code Project'";

I wanna generate substrings from above string and store its respective value
for eg:
column1="ABC"; column2="xyz" column3 contains two values and i want to store it in array like column3[]={"pqr","NON"}...got struck ! pls help!!

Regards,
DevD

Posted 12-Nov-11 7:41am

nadeva

Updated 12-Nov-11 8:48am

Yvan Rodrigues

v2

Add a Solution

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Yvan Rodrigues · Accepted Answer · 2011-11-12T08:50:00

Solution 1

What you want to do is called tokenizing.

The best way to do this would probably be with regular expressions. If you don't know what they are yet, well... I want you to remember where you were on November 12, 2011, because your life is about to change.

The 30 Minute Regex Tutorial[^]

Posted 12-Nov-11 8:50am

Yvan Rodrigues

Updated 12-Nov-11 8:51am

v2

Comments

Sergey Alexandrovich Kryukov 12-Nov-11 19:52pm

Good point, a 5.
--SA

nadeva 13-Nov-11 14:42pm

Thanks Yvan R..I tried with reg expressions.nd it worked quite fine..nd ur link was a very good article (abt 30 min regex tutorial)..

ideafixxxer · Accepted Answer · 2011-11-12T09:18:00

Hi,

Have you tried Regex?

Something like

C#

Regex r = new Regex(@"((?'tab'\w+)\.(?'col'\w+)(\s*=\s*\'(?'val'\w+)\'|\s+IN\s*\((?'item'\s*\'(?'val'\w+)\'\s*,?)+\)))");
var matches = r.Matches(strVal);
string column1 = null, column2 = null;
string[] column3 = null;
foreach (Match m in matches)
{
	Group col = m.Groups["col"];
	if (col.Success)
	{
		switch (col.Value)
		{
			case "column1":
				column1 = m.Groups["val"].Value;
				break;
			case "column2":
				column2 = m.Groups["val"].Value;
				break;
			case "column3":
				column3 = m.Groups["val"].Captures.Cast<capture>().Select(c => c.Value).ToArray();
				break;
		}
	}
}
</capture>

Sorry for bad style, ideafixxxer