How to extract variable and its value from URL

[Jozef Jarosciak]

I have url:
www.site.com/index?a=1&b=2
www.site.com/index?a=1

and I need a regex or some solution to extract 'a' variable and its
value.

Any ideas?
joe

 

[Guest]

This variable getting... do you want to do this to a URL, or from within a
page that has been requested with those variables?

If it is the 2nd, take a look at the Response class which you can easily
query with...

int varA,varB;
varA = Response["a"];
varB = Response["b"];

Brendan

 

[Nicholas Paldino [.NET/C# MVP]]

Jozef,

You wouldn't even need a regular expression, you can just parse it apart
on the equals sign and the ampersand (but a regular expression would work
fine as well).

Pass the URL to the constructor of the Uri class, and then use the Query
property to get the query string. Drop the first character (it is always
the question mark), and the rest should be easy to parse. The only thing
you have to worry about at that point is the encoding which is a simple
matter of fixing).

Hope this helps.