Custom paging with ASP.NET GridView

<?xml version="1.0"?>
<!--
  For more information on how to configure your ASP.NET application, please visit
  http://go.microsoft.com/fwlink/?LinkId=169433
  -->
<configuration>
  <connectionStrings >
    <add name="myConnection" connectionString="Data Source=TANWEERAKHTER;Initial Catalog=Northwind;Persist Security Info=True;User ID=sa;Password=786" providerName="System.Data.SqlClient"/>
  </connectionStrings>
  <appSettings>
    <add key="URL" value="http://localhost:52236/braviPaging/Default.aspx"/>
  </appSettings>
  <system.web>
    <compilation debug="true" targetFramework="4.0"/>
  </system.web>
</configuration>