What is QueryString used for?

On the internet, a Query string is the part of a link (otherwise known as a hyperlink or a uniform resource locator, URL for short) which assigns values to specified attributes (known as keys or parameters) .

Form – means you are wanting to retrieve the values for the form that was posted. Request. QueryString – means you are wanting to retrieve values that have been passed on the querystring .

The QueryString collection is used to retrieve the variable values in the HTTP query string . The line above generates a variable named txt with the value “this is a query string test”. Query strings are also generated by form submission, or by a user typing a query into the address bar of the browser.