Request. QueryString[“pID”]; Here Request is a object that retrieves the values that the client browser passed to the server during an HTTP request and QueryString is a collection is used to retrieve the variable values in the HTTP query string .
Read moreHow do I request a QueryString in ASPX?
To retrieve the query string value, use Request object’s QueryString property.
Read moreWhat is query string with example?
A query string commonly includes fields added to a base URL by a Web browser or other client application , for example as part of an HTML, choosing the appearance of a page, or jumping to positions in multimedia content.
Read more