Pass (Send) GridView Row Values to another Page using QueryString in ASP.Net

Here Mudassar Ahmed Khan has explained with an example, how to pass (send) GridView Row Values to another Page using QueryString in ASP.Net using C# and VB.Net. Passing (Sending) whole GridView row through QueryString would not be a good idea due to the following reasons. 1. QueryString is unsecure for sending data as it can be easily tampered. 2. If GridView has too many Columns then it will be a very long URL with too many QueryString values. Hence this article will illustrate, how only the Index of the GridView row will be sent using QueryString to another Page and the remaining data will be fetched using the PreviousPage property of ASP.Net.