Programmatic Paging

Updated on Sep 23, 2026

Programmatic paging could be done with the help of the public paging API that RadDataServiceDataSource.DataView provides. The DataView property implements the IPagedCollectionView interface which contains all paging methods and properties.

Example 1: The IPagedCollectionView interface

C#

public interface IPagedCollectionView
{
    bool CanChangePage { get; }
    bool IsPageChanging { get; }
    int ItemCount { get; }
    int PageIndex { get; }
    int PageSize { get; set; }
    int TotalItemCount { get; }

    event EventHandler<EventArgs> PageChanged;
    event EventHandler<PageChangingEventArgs> PageChanging;

    bool MoveToFirstPage();
    bool MoveToLastPage();
    bool MoveToNextPage();
    bool MoveToPage(int pageIndex);
    bool MoveToPreviousPage();
}

VB.NET

Public Interface IPagedCollectionView
	ReadOnly Property CanChangePage() As Boolean
	ReadOnly Property IsPageChanging() As Boolean
	ReadOnly Property ItemCount() As Integer
	ReadOnly Property PageIndex() As Integer
	Property PageSize() As Integer
	ReadOnly Property TotalItemCount() As Integer

	Event PageChanged As EventHandler(Of EventArgs)
	Event PageChanging As EventHandler(Of PageChangingEventArgs)

	Function MoveToFirstPage() As Boolean
	Function MoveToLastPage() As Boolean
	Function MoveToNextPage() As Boolean
	Function MoveToPage(ByVal pageIndex As Integer) As Boolean
	Function MoveToPreviousPage() As Boolean
End Interface

Example 2 shows how to use the DataView in order to set the last page as the current page.

Example 2: Moving to the last page

C#

private void MoveToLastPage(RadDataServiceDataSource dataSource)
{
    dataSource.DataView.MoveToLastPage();
}

VB.NET

Private Sub MoveToLastPage(ByVal dataSource As RadDataServiceDataSource)
	dataSource.DataView.MoveToLastPage()
End Sub

When a page change is requested, a trip to the server will be made regardless of the AutoLoad setting. When filtering, sorting or grouping occurs, a trip to the server is made, the DataView is re-created and always returns to the first page.

See Also

• Creating the Data-bound Controls
• Manual vs. Auto Loading