I'm trying to get a gridview to sort and page manually with no success.

The problem is that when a user clicks the column they want to sort, it sorts that page, but doesn't sort the datasource (dataview) behind the gridview. So when they progress to a different page, their sort is lost. Pretty much I'm looking for a sort that will actually sort the datasource behind the gridview. Here is what I have so far:

protected void GridView_OnSort(object sender, GridViewSortEventArgs e)
	{
		String sortExpression = e.SortExpression;

		if (GridViewSortDirection == SortDirection.Ascending)
		{
			DataView myDataView = new DataView(mybll.GetItemsOrdered());
			myDataView.Sort = sortExpression + " DESC";
			GridView.DataSource = myDataView;
			GridView.DataBind();
		}
		else
		{
			DataView myDataView = new DataView(mybll.GetItemsOrdered());
			myDataView.Sort = sortExpression + " ASC";
			GridView.DataSource = myDataView;
			GridView.DataBind();
		}
	}

Any help would be appreciated. Thanks.