[SOLVED] GridView TextBox value lost on PostBack in ASP.Net

Here Mudassar Ahmed Khan has provided solution to the problem where value of the TextBox placed in GridView is lost after PostBack in ASP.Net with C# and VB.Net. When PostBack happens i.e. when Button is clicked or any other control that does PostBack inside GridView, the GridView is again populated with data and hence the modified values in TextBox are lost.