//Filling Zones
/// <summary>
/// sorts the grid based on sort expression and sort direction
/// </summary>
/// <typeparam name="T"> Type</typeparam>
/// <param name="gvObject">Gridview</param>
/// <param name="sDir">sortDirection</param>
/// <param name="sortExpr">sortExpression</param>
/// <param name="collection">List of Items with genericcollection</param>
public static void GridSort <T>(GridView gvObject, SortDirection sDir, string sortExpr, GenericCollection <T> collection)
{
GenericCollection <T> .GenericComparer comparer = new GenericCollection <T> .GenericComparer(sortExpr, sDir);
collection.Sort(comparer);
gvObject.DataSource = collection;
gvObject.DataBind();
}