c# - Working with URL query Strings in ASP.NET -

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i new working asp.net , want find best way work url query strings.

i can current value of url query string using request.querystring["urlkey"], can modify url code, without doing form get submission?

if user landing on page first time, easiest way programmatically create ?urlkey=value through page_load method? or better of doing javascript or building redirect like: string redirect = "www.mysite.com?" + mykey + "=" + myvalue;

it sounds want this:

string redirect = "www.mysite.com?mykey=" + myvalue.tostring(); response.redirect(redirect);

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