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ASP.NET AJAX Controls Version Q2 2011 released 07/12/2011

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	Grid
	Overview Outlook Grid Web Mail Grid Hierarchy with Templates Filter Templates Persisting Grid Settings What's New WAI-ARIA Support .NET 4.0 Data Binding to Dynamic Types Data Binding RadGrid to DomainDataSource Performance Virtual Scrolling with Client-Side Binding Client-Side Binding and Caching 300 000 Rows with LINQ Using RadInputManager ViewState Optimization Shared RadDatePicker Master/Details Client-Side Binding Migration from GridView Migration from GridView Columns Column Types Attachment Column Rating Column Calculated Columns Footer Aggregates Column Formatting Column/Row Resize/Reorder Header Context Menu Header Context Filter Menu Column Animations Rows Accessing Cells and Rows Selected Rows Style Items Drag-and-drop Data Binding Client-side binding Declarative Binding Programmatic Binding Server-side binding Simple Data Binding Advanced Data Binding NET 2 DataSource Controls NET 3.5 DataSource Controls Various DataSources Master/Detail Grids Programmatic Creation from XML WebService binding Client Binding Server Binding .NET 3.5 Client-Side Binding Sorting Basic Sorting Programmatic Sorting Paging Basic Paging Alphabetic Pager Slider/Advanced-style Pager Pager Template Customizing the Pager Custom Paging SEO-friendly Paging Scrolling Scrolling Virtual Scrolling and Paging Frozen Columns Selecting Client-Side Row Selection Server-Side Row Selection Exporting Export to PDF MS Excel/MS Word/CSV Export to ExcelML Filtering Basic Filtering Filtering in Hierarchy Filtering Template Columns Google-like Filtering Filtering with RadFilter Hierarchy Declarative Relations Programmatic Binding Autogenerate Hierarchy Several Tables at a Level Client-side Hierarchy Loading Mixed Hierarchy Loading NestedViewTemplate Relations Self-referencing Hierarchy Grouping Outlook-style Grouping Group By Expressions Client Group Load Group Footers Insert/Update/Delete Automatic CRUD Operations Automatic Operations Entity Framework Operations LinqToSql Operations Manual CRUD Operations Entity Framework Manual Operations LinqToSql Manual Operations Extracting values Using Column Editors Using Server-side API Edit Form Types Edit Form with Multiple Columns Command Item User Control Edit Form Form Template Edit Form PopUp Edit Form Editing with External Form Edit on Double-click Update/Insert/Delete in Hierarchy Client-Side Insert/Update/Delete Client Edit with Batch Server Update Client-Side Inline Delete Editing XML Using XmlDataSource Validation Flexible Server-Side Validation Programmatic Creation On PageInit On PageLoad Creating Hierarchy Programmatically Layout CardView ListView/DataList View Displaying Pivot Data Client-Side API Client Objects and Events Client-Side API Keys/Values Client-Side Accessibility and Internationalization Localization Keyboard Support Accessibility Right-to-left Support Appearance/Styling Custom Skin Styling Header, Footer and Pager Styling Edited Rows Application Scenarios Binary Images and Upload in Grid Binary Images and RadAsyncUpload in Grid AJAX-enabled Context Menu Grid Filtered by Combo Load on Demand Grid in Combobox Combo in Grid Window Editing Resizing RadGrid in RadSplitter RadNumericTextBox for Footer Totals Grid with TreeView/ComboBox editors Grid and Aggregate Chart Chart in TemplateColumn Tooltipified RadGrid RadToolBar as Command Item Spell Check RadGrid editors Insert with Tooltip Drag-and-drop From Grid to Scheduler

Grid / Custom Paging

Custom paging, grouping and filtering on 100000 items using NeedDataSource

Drag a column header and drop it here to group by that column

Open the calendar popup.

1 2 3 4 5 6 7 8 9 10 ...

Page size:

100000 items in 10000 pages

0

Maxilaku

$18.40

Thursday, July 31, 2008

1

Gula Malacca

$32.00

Friday, February 22, 2008

2

Boston Crab Meat

$3.00

Saturday, January 19, 2008

3

Côte de Blaye

$3.00

Saturday, September 13, 2008

4

Chocolade

$32.00

Thursday, July 31, 2008

5

Rogede sild

$9.00

Monday, May 12, 2008

6

Maxilaku

$32.00

Friday, February 22, 2008

7

Chocolade

$14.00

Friday, February 22, 2008

8

Zaanse koeken

$45.60

Friday, February 22, 2008

9

Rogede sild

$19.00

Tuesday, August 26, 2008

Custom paging, grouping and filtering on 100000 items using ObjectDataSource

Drag a column header and drop it here to group by that column

Open the calendar popup.

1 2 3 4 5 6 7 8 9 10 ...

Page size:

100000 items in 10000 pages

0

Maxilaku

$18.40

Thursday, July 31, 2008

1

Gula Malacca

$32.00

Friday, February 22, 2008

2

Boston Crab Meat

$3.00

Saturday, January 19, 2008

3

Côte de Blaye

$3.00

Saturday, September 13, 2008

4

Chocolade

$32.00

Thursday, July 31, 2008

5

Rogede sild

$9.00

Monday, May 12, 2008

6

Maxilaku

$32.00

Friday, February 22, 2008

7

Chocolade

$14.00

Friday, February 22, 2008

8

Zaanse koeken

$45.60

Friday, February 22, 2008

9

Rogede sild

$19.00

Tuesday, August 26, 2008

There are cases in which you may want to fetch only a fixed number of records and perform operations over this specified set of data. Telerik RadGrid allows such data manipulation through the custom paging mechanism integrated in the control. The main steps you need to undertake are:
- Set AllowPaging = true and AllowCustomPaging = true for your grid instance
- Implement code logic which to extract merely a fixed number of records from the grid source and present them in the grid structure
- The total number of records in the grid source should be defined through the VirtualItemCount property of the MasterTableView/GridTableView instance. Thus the grid "understands" that the data source contains the specified number of records and it should fetch merely part of them at a time to execute requested operation.
This example demonstrates the approach for custom paging depicted above. The simulated "DataLayer" wraps the logic for extracting records only for the specified page (along with deleting records option). Telerik RadGrid maintains the pager buttons, changing of pager and other presentation specific features.

Source Code

C# VB.NET

Show code in new window Demo isolation steps

<%@ Page Language="vb" AutoEventWireup="false" Inherits="Telerik.GridExamplesVBNET.Programming.CustomPaging.DefaultVB" CodeFile="DefaultVB.aspx.vb" %> <%@ Register TagPrefix="telerik" Namespace="Telerik.QuickStart" %> <%@ Register TagPrefix="telerik" TagName="Header" Src="~/Common/Header.ascx" %> <%@ Register TagPrefix="telerik" TagName="HeadTag" Src="~/Common/HeadTag.ascx" %> <%@ Register TagPrefix="telerik" TagName="Footer" Src="~/Common/Footer.ascx" %> <%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <telerik:HeadTag runat="server" ID="Headtag2"></telerik:HeadTag> </head> <body class="BODY"> <form runat="server" id="mainForm" method="post"> <telerik:Header runat="server" ID="Header1" NavigationLanguage="VB"></telerik:Header> <telerik:RadScriptManager ID="RadScriptManager1" runat="server" />  <telerik:RadAjaxManager ID="RadAjaxManager1" DefaultLoadingPanelID="RadAjaxLoadingPanel1" runat="server"> <AjaxSettings> <telerik:AjaxSetting AjaxControlID="RadGrid1"> <UpdatedControls> <telerik:AjaxUpdatedControl ControlID="RadGrid1" /> </UpdatedControls> </telerik:AjaxSetting> <telerik:AjaxSetting AjaxControlID="RadGrid2"> <UpdatedControls> <telerik:AjaxUpdatedControl ControlID="RadGrid2" /> </UpdatedControls> </telerik:AjaxSetting> </AjaxSettings> </telerik:RadAjaxManager> <telerik:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel1" runat="server"> </telerik:RadAjaxLoadingPanel> <b>Custom paging, grouping and filtering</b> on <b>100000</b> items using <b>NeedDataSource</b> <telerik:RadGrid ID="RadGrid1" ShowGroupPanel="true" AllowFilteringByColumn="true" Width="95%" ShowStatusBar="true" runat="server" AllowPaging="True" AllowCustomPaging="True" VirtualItemCount="100000" AllowSorting="true"> <ClientSettings AllowDragToGroup="true" /> <PagerStyle Mode="NextPrevAndNumeric"></PagerStyle> </telerik:RadGrid> <br /> <br /> <b>Custom paging, grouping and filtering</b> on <b>100000</b> items using <b>ObjectDataSource</b> <telerik:RadGrid ID="RadGrid2" DataSourceID="ObjectDataSource1" ShowGroupPanel="true" AllowFilteringByColumn="true" Width="95%" ShowStatusBar="true" runat="server" AllowPaging="True" AllowSorting="true"> <ClientSettings AllowDragToGroup="true" /> <PagerStyle Mode="NextPrevAndNumeric"></PagerStyle> <MasterTableView OverrideDataSourceControlSorting="true" /> </telerik:RadGrid> <asp:ObjectDataSource ID="ObjectDataSource1" runat="server" EnablePaging="true" SelectCountMethod="SelectCount" SelectMethod="Select" TypeName="Telerik.Web.Examples.Grid.MyBusinessObjectCollection"> </asp:ObjectDataSource>  <telerik:Footer runat="server" ID="Footer1"></telerik:Footer> </form> </body> </html>

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