This article describes on how to add rows in GridView without using a database. Basically the GridView will be populated with data based on the values entered in the TextBox on Button Click and retain the GridView data on post back. STEP 1: Add One TextBox, One Button and One GridView control the web form. The ASPX mark-up should look like these below <asp:TextBox ID="TextBox1" runat="server"/> <asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" /> <asp:GridView...