Enjoy components for every need: navigation and layout, data management and visualization, editing, interactivity and more. In our 11 years of aggressive product development – including 3 major and up to 6 minor releases per year – we have implemented, tested and optimized over 4,000 features in Telerik ASP.NET controls.

Complete Set of Features and Controls
Enjoy components for every need: navigation and layout, data management and visualization, editing, interactivity and more. In our 11 years of aggressive product development – including 3 major and up to 6 minor releases per year – we have implemented, tested and optimized over 4,000 features in Telerik ASP.NET controls.

Mobile Support and Responsiveness
No need to build a mobile version of your project since the web sites and apps built with Telerik ASP.NET controls work equally well on desktop and mobile devices.

Use the Page Layout Framework to build responsive ASP.NET applications
Leverage the adaptive, fluid, elastic and responsive capabilities featured in most controls to offer user experiences tailored to each end-user's device
Gain productivity since touch events are handled in the same manner as those triggered by a keyboard or a mouse
Get a better user experience with the two mobile skins especially designed for touch devices that come included in the suite

20 Built-In Professional Grade Skins
Give your applications a sleek, professional look by setting a single property. By applying one of the 20 professionally-designed skins that come with Telerik UI for ASP.NET AJAX, including two engineered with mobile devices in mind, you save design and front-end development time. No need to be a CSS wizard to create or customize the Telerik skins with our web-based Visual Style Builder.

Exceptional Performance and User Experience

We constantly optimize the performance of UI for ASP.NET AJAX to meet your end users’ expectations. This is why the controls:

Produce minimal and clean HTML and CSS
Minimize j@vascript by loading only what’s needed
Reduce postbacks for a better user experience
Compress data transferred between browser and server (Pages, j@vascript, ViewState, JSON data, etc.)
Use built-in CDN support and CSS sprites to deliver content faster to end-users (Telerik covers all CDN costs for you)
Minimize memory usage and have robust code, free from memory leaks

UI for ASP.NET AJAX Q2 2015 (version 2015.2.623)

Common
FIXED

    SkinRegistrar uses ThreadStatic collections to register scripts, which may break in WebFarm scenarios
    Unable to scroll control's content on iOS and Android if nested in another control, when both parent and child controls use TouchScrollExtender 

CHANGED

    All buttons in Lightweight mode are changed to not render additional spans

Infrastructure
FIXED

    An error is thrown when setting a Width property to the SpreadSheet column.

AsyncUpload
FIXED

    RadAsyncUpload breaks accent characters under ISO-8859-15 encoding

Barcode
FIXED

    RadBarcode does not generate correctly check digit in UPCE format

Button
FIXED

    Improve the width of the RadButton with an Icon in Classic render mode for all button types
    Icon cannot be set in RadButton EnableSplitButton="true" for Lightweight render mode
    Height of RadButton with ContentTemplate in Bootstrap skin
    Fix the data-binding of a RadButton with ContentTemplate in a control that has an ItemTemplate
    If the Target property of the RadButton (ButtonType="LinkButton") is set to a custom string the link is not opened
    Checked property of RadButton is not preserved during postbacks when set on initial page load

Calendar
NEW

    Added focused state to RadCalendar

FIXED

    RadDateTimePicker throws error when RenderMode=Lightweight and TimePopupButton-Visible=false
    The dates of RadCalendar are cut when the header text is too small
    FastNavigation menu of Lite Calendar could not be opened with left mouse click when click out of the title text
    In IE7 the layout of the "RadTimePicker1_timePopupLink" is broken
    Fixed Lightweight issues in RadPickers and RadInputs in some skins
    The bottom border disappears occasionally in RadPickers when increasing the font-size
    The PopupDirection property does not correctly set the popup direction when left/right is used
    Title and navigation text appears in RadCalendar Titlebar in design view
    RadDatePicker, RadDateTimePicker and MonthYearPicker are using Culture instead of UICulture to localize their tooltips

ClientExportManager
NEW

    PDF multi page export with RadClientExportManager

DataPager
NEW

    Added adaptive capabilities to RadDataPager

FIXED

    When RadDataPager with RadDataPagerPageSizeField is added to RadListView an error is shown in Design View
    In RadDataPager in Bootstrap the rdpPagerLabel elements are not vertically centered Classic Render Mode)
    Vertically not centred text in RadDataPager Bootstrap skin

Dock
FIXED

    The resize handle of a resizable RadDock is displaced when the control is docked in a RadDockZone in Chrome
    Content does not appear on show with set_visible(true) when Dock is Closed=true in Classic render mode

DropDownList
FIXED

    Selected item with empty text does not remove the default message of the control

DropDownTree
FIXED

    Disabled Node on the RadDropDownTree still could be selected

Editor
NEW

    Added adaptive capabilities to RadEditor
    Important Change: FormatPainter tool uses a DOM based command
    Added Enable drag and drop file upload in RadEditor's FileBrowser dialogs

FIXED

    Using RibbonBar ToolBarMode is impossible to add link to image via the Hyperlink manager under IE browsers
    Content after script tags is stripped when submitted from the HTML mode
    Multiple characters deletion when track changes enabled and Editor in TabStrip
    ApplyCssClass dropdown is not populated after an imported stylesheet is not found
    In HTML mode of RadEditor get_html does not run the content filters
    ConvertToXhtmlFilter adds additional paragraphs when there is a table in the content and the table contains paragraphs and it is placed inside another paragraph
    Incorrect table nesting when a Table Properties is opened under IE11 and Chrome
    Paste does not work in Internet Explorer when browser security setting Allow Programmatic clipboard access is disabled
    Div element is stripped out when submitting from HTML mode and ContentAreaMode is Div
    Interaction of Zoom with Toggle Full Screen Mode
    Functionality of Content Comments with enabled Track Changes
    Selection Issues Using showExternalDialog
    Paste link path problem in Firefox
    ContentAreaMode="Div" breaks the editor resizing
    Inline formatting cannot be applied and removed when no selection is made in iOS
    The Tab and Enter keys can be used to indent RadEditor's content in IE when the control is disabled from the client-side
    The Editor appears broken and JS error is thrown when integrated with RadWindow under IE11
    Linking an image to an URL using Link Manager of RadEditor does not link the image properly under IE11
    Font-size and Font-name are not applied under iOS Safari in iPad
    RadEditor's ConvertToXhtml filter throws javascript error when content has empty paragraph with nested empty h tags
    Executing a Cut command in Track Changes rearranges the content of RadEditor in IE
    JS error is thrown when inserting link from Hyperlink Manager opened through the InsertLink dialog in IE11
    The browser crashes after RadEditor undo is performed over a table in IE11
    get_text() should not encode brackets and spaces
    get_html function returns additional zero-width space (U+200B) characters
    Typing is not possible in IE11 and ContentAreaMode="Div"
    InlineCommands cannot be turned off in Chrome
    IE11 crashes when Undo is performed over table, list
    RadEditor DropDown values are not elastic in Lightweight render mode
    A javascript error is thrown in RadEditor with Lightweight rendering and IIS Express server is used
    Incorrect selection of parent dom element of the DomInspector in IE and WebKit browsers
    Full HTML editing in RadEditor causes slow CSS rendering when switching from HTML to Design under Chrome and Firefox
    Groupbox borders don't resize when large text is set
    When applying the format of a non-styled text to text with underline decoration - the underline decoration remains
    The FormatPainter tool does not work correctly with some format options
    Sub list items of lists pasted from Word get scrambled when there is complex nesting
    White spaces between inline elements are stripped on creating new paragraph
    FormatBlock tool causes cursor to jump past the last element, when there is selection and other block elements
    Selectionchange event is not raised on mouseup when RadEditor is in RadWindow under Chrome and Firefox
    Using Backspace or Delete on nested list, causes a parent list item to appear that cannot be edited under Chrome
    When RadEditor control is set as an Editable item of the RadGrid and the popup is set to Modal=true, invoking the ToggleScreenMode causes the editor to be behind the modal layer
    Inconsistent behavior with white spaces (when Space is pressed) with disabled Track Changes under Chrome and Safari
    Accepting tracked deleted block element will delete the following block element

CHANGED

    Improved the Cut command functionality of RadEditor when Track Changes are enabled
    The obsolete TrackChangesDialog and DiffEngine class are removed

FileExplorer
NEW

    Drag and drop upload over the file list area of RadFileExplorer
    OnClientFilesDropping client-side event created for RadFileExplorer
    Added property for overriding files when drag-dropping in the file list
    Ability to set the RadFileExplorer paths (ViewPaths, UploadPaths, EditPaths) before PagePreRender and after PageLoad.

CHANGED

    RadAsyncUpload is the default upload tool

Filter
FIXED

    RadFilter tool elements are not equal in Bootstrap skin when RenderMode is Lightweight
    Lightweight Filter DateTimePicker buttons are bigger than expected in Sunset skin
    DatePickers do not inherit the elastic behavior of RadFilter

FormDecorator
FIXED

    When tabbing select elements decorated by RadFormDecorator, the original hidden select element is focused in Lightweight Rendering

Gantt
NEW

    Implemented ClientState to preserve SelectedView and ScrollPosition across postback

Gauge
FIXED

    Setting the width of RadGauge in percent will set it in pixels

Grid
NEW

    Improved: RadGrid grouping calculation to use the data of all the group's items
    Support for resizing columns with frozen columns
    Added support for ESQL (Entity SQL) expressions in RadGrid + RadFilter
    Added Drag icon to RadGrid
    Added mobile rendering to RadGrid pager
    Added option to generate ESQL expressions in RadGrid even if not bound to EDS control
    Localize From and To in the filter area of the GridDateTimeColumn
    RadGrid pager mobile rendering

FIXED

    HierarchyLoadMode set to Client does not work properly when RadGrid is bound via NeedDataSource and the detail tables have a DataSourceID assigned
    Using drag for selecting cells breaks browser selection
    When Batch Edit Mode is used, entering opening and closing tags at the same time is breaking the escaping functionality
    The footer value of the GridNumericColumn is represented as string when exporting to Excel Biff format
    Blank rows are rendered in the last group when the PageSize is larger than the visible number of items in a scenario where client-side binding is used
    When the picker control in GridDateTimeColumn is focused and Enter is pressed the first Button on the page is clicked
    Grouping functionality of RadGrid fails when DataField and UniqueName of the column are not equal
    CommandArgument does not always describe the FilterFunction
    Invoking the EvaluateFilterExpression method of the GridColumn prior to assigning a data source for the grid prevents it from populating.
    When 'Detail' is used in the ID of RadGrid, The Column Reordering does not work as expected
    When virtualization is enabled some of the items are lost after scrolling up and down
    RadGrid FrozenColumns – in case a column is frozen/unfrozen with the context menu it continues to behave as frozen one
    GridDateTimeColumn does not fire the filter command on a button click.
    Automatic deletes do not work correctly when the MasterTableView uses an ItemTemplate
    RadGrid sets the CurrentFilterFunction to EqualTo if the previous filter is removed and a new filter value is provided
    It is not possible to cancel the insert form of Mobile Grid when EditMode=PopUp in Firefox
    Postback is initiated after calling Rebind() when RadGrid is bound Client-side
    RetainGroupFootersVisibility does not work correctly with GroupLoadMode = Client
    When EnableEmptyListItem property for a GridDropDownColumn is enabled there is no empty item in the editor
    Next/Prev buttons of RadGrid frozen columns do not work when the command item is located in the bottom of the grid
    Filtering does not work correctly for auto-generated columns that are bound to a boolean field.
    Setting the RenderMode to Lightweight in the web.config file breaks the header context menu rendering
    Insert item for RadGrid is not opened properly in Chrome in some scenarios
    RadGrid throws js error when RenderMode="Mobile" and asp scriptmanager is added to the page.
    Missing Grid batch edit indicator icon for alt row in Bootstrap Skin
    Visual glitches with Grid group footers in Bootstrap skin
    Editing a single cell and tapping the Batch Editing Save changes button, while still in Edit mode, does not update the cell content in iOS and Android
    Group continued from the previous page... message is shown when the grid is on the first page and LINQ Grouping is used
    When EnablePostBackOnRowClick is set to true and checklist filtering and scrolling are enabled the edit form is not opened for the first grid rows after an EditSelected command is fired
    Added StringTrueValue and StringFalseValue properties that to be used when binding CheckBoxColumn to string column in the database
    RadGrid aria-hidden has wrong value on col elements of header table
    RadGrid HeaderContextMenu does not hide while scrolling the grid
    RadGrid makes postback when delete column's confirm dialog is RadWindow in a client binding scenario
    Error/no data returned when filtering dates in RadGrid when bound to WCF service with some culture combinations
    RatingColumn's value is not exported in HTML Based and PDF export formats
    DataFormatString is not applied in DOCX export format
    Setting custom format in the exported does not work for some cultures
    NoFilter function does not clear column filter value for detail tables
    When NoFilter is selected for a column in a detail table the filter item value is not cleared
    GridHyperLinkColumn filter on enter key is not working when the column is added inside DetailTables
    In RadGrid when using IsEmpty and IsNull filter functions the CSS class rgFiltered is not applied to the filter icon
    When applying NotIsEmpty and NotIsNull filters in RadGrid the rgFiltered class is not applied to the filter button
    When EnableLinqGrouping is set to true(default) and the field which is set as a SelectField contains string values, which are substrings in the other values in that same field, the FormatString breaks
    It is not possible to sort and filter RadGrid via ContextMenu when the grid is bound via ClientDataSource
    There is a gap on the bottom on the RadGrid when EnableNextPrevFrozenColumns is enabled
    When the grid is bound to a RadClientDataSource control and grouping is applied, the NoRecords template is shown after the last group is collapsed and then expanded
    When GridTemplateColumn.ForceExtractValue property is set to Always, exception is throw on Edit command
    Grouping by a field from a detail table throws an exception when the detail table is bound to a list of DataRow objects
    RadGrid enters into an infinite loop when exporting a gif image.
    The hidden columns header text is exported to Excel when using a Biff export with multi-column headers
    When RadGrid is rendered in Lightweight mode with Black\MetroTouch skins - the input is higher than the filter
    Sorting with HeaderContextMenu is not getting the SortExpression property from the column and SortCommand event is not firing
    CheckList Filtering functionality does not work with Client-Side Binding to RadClientDataSource
    The GUID field values are not exported in Excel document when using ExcelML export format

HtmlChart
NEW

    Added Visual string property setting visual templates function reference for LabelsAppearance, SeriesAppearance, MarkersAppearance, AxisTitleAppearance and Legend Item
    Added Align, Width, Height, Orientation, OffsetX, OffsetY properties to Legend Appearance property
    Added NarrowRange boolean property to YAxis. If set to true, the chart will prevent the automatic axis range from snapping to 0

FIXED

    Fixed selection hint of Data Navigation in RadHtmlChart is not visible
    RadHtmlChart is not rendered when initially hidden wrapper becomes visible

ImageEditor
FIXED

    If there are slashes inside a passed query string, it gets broken when the image is saved in ImageEditor
    Adding an ImageEditor inside a RadPanelBar breaks the RadPanelBar's designer
    There is no disclaimer shown when ImageEditor with enabled canvas mode is used in IE8
    The Crop box in the ImageEditor isn't resized correctly when the left corners are dragged

ImageGallery
NEW

    Added adaptive capabilities to RadImageGallery

FIXED

    Next/Prev buttons of ImageGallery are not styled correctly in Visual Studio designer
    Extra arrow displayed in RadImageGallery designer in Visual Studio
    The toolbar does not behave correctly when its position is set to Top or Bottom
    The ClientImageLoaded event is not raised for the first image when DisplayAreaMode is set to Image
    RadImageGallery fullscreen mode overrides viewport meta tag set on page
    RadImageGallery throws a JS error when hover over it and there is no selected item

Input
NEW

    Added Lightweight RenderMode for RadInputManager

FIXED

    RadNumericTextBox in RadFilter does not preserve its value in some cultures when LoadSettings is used
    Multiline TextBox is rendered as a single-line textbox with the skins, which are using big metrics
    RadDatePicker and RadDateTimePicker do not accept 01/01/0001 date
    When a validation group is programmatically assigned to the RadInputManager settings the validation fails
    RadInput changes its size on hover when RenderMode="Lightweight" and FontSize is set

LightBox
FIXED

    LightBox is not opened when placed in any template of the GridTemplateColumn.
    Next/Prev buttons of RadLightBox are wrongly located when navigate to empty item
    Hide animation takes the speed of the last animation seen
    The bottom glow effect of LightBox is missing in IE7
    RadLightBox KeyBoardNavigation prevents all the keys shortcuts

ListBox
FIXED

    ListBox in IE - page scrolls down after clicking an item's checkbox

ListView
FIXED

    When rebind is called and the child data bound controls get populated, the DataKeyValues of the parent RadListViewDataItem are not available

Map
FIXED

    MarkerBinding fields do not work when declared from code behind

MediaPlayer
NEW

    Improve RadMediaPlayer to work with Youtube's 3.0 API and OAuth 2.0 for accessing the playlists

FIXED

    Chrome displays an error message upon navigating to different page while RadMediaPlayer is still playing

Navigation
FIXED

    Space key does not work in RadSearchBox in RadNavigation Template

Notification
NEW

    Lightweight RenderMode for RadNotification

FIXED

    RadNotification does not dispose its overlay iframe when disposed with AJAX

PdfProcessing
NEW

    Introduced API for merging PDF documents
    Implemented loading ImageSource on demand when importing PDF documents
    Introduced API for accessing image data
    Implemented support for import and export of TrueType fonts
    Implemented support for import and export of text showing content stream operators
    Implemented support for import and export of text positioning content stream operators
    Optimized performance when Image objects are imported and exported by not decoding and encoding the image data
    Provided API for inserting and retrieving images as encoded image data

FIXED

    Image is not imported correctly if the stream position is not at the beginning of the stream
    Exception is thrown on import when there is no carriage return symbol after stream keyword

PersistenceFramework
FIXED

    Persistence Framework for RadGrid Showing FieldName instead of Header Text while Loading From 'Data Store'

PivotGrid
NEW

    Added resizing columns functionality for RadPivotGrid
    Added filtering support for hierarchical fields

FIXED

    PivotGrid header rendering is not correct on browser window maximize
    RadPivotGrid layout is broken while nested in RadWindow
    Using Filter Window of RadPivotGrid and selecting only (blank) to show null values causes a server-side error
    FlattenOlapUncategoriezedFields property of PivotGrid could not bet set on server
    RadPivotGrid rendering issue in case it is placed in not initially selected RadMultiPage
    RadPivotGrid Fields Window is opening and positioning itself relative to the pivot grid itself

ProgressArea
NEW

    Lightweight RenderMode for RadProgressArea

RibbonBar
NEW

    Lightweight RenderMode for RadRibbonBar

Rotator
FIXED

    Fixed disappearance of a RadRotator, which occurs when the control is placed in a RadTabStrip and is updated through RadAjaxManager

Scheduler
NEW

    Lightweight RenderMode for RadScheduler

FIXED

    WebService Day, Week and Multiday Views, after clicking show24hours the generated slots rows are not grouped according to the TimeLabelRowSpan property
    WebService Day, Week and Multiday Views, after clicking show24hours the generated slots rows don't have the non work hours styling
    Firefox for Mac display appointments incorrectly in RadScheduler MonthView, when bound to WebService
    TimelineView grouped by resource vertical with OverflowBehavior is Expand, Resource headers are misaligned
    Fixed javascript error when resizing appointment in Month View
    MultidayView and TimelineView: appointments spanning multiple days do not show in all days when RadScheduler is grouped by resource and date
    Duplicated ColumnHeaders for November 2015 in (UTC -5 Eastern Time) for RadScheduler in Month View
    RadScheduler first day of every month - date formatting issue
    Row headers misaligned in Day, Week and Multiday Views grouped vertically when TimeLabelRowSpan is set to an odd number (for instance 3)
    In Day, Week and Multiday views the slots rows are not grouped according to the TimeLabelRowSpan property
    Vertical grouped by Date WeekView with ShowDateHeaders=false produces no AllDay Row headers
    WebService Day and Multiday Views, navigating forward and backward through the dates doesn't update the Saturday and Sunday columns style
    RadScheduler server-side binding, no indication when saving the Advanced form that the subject field is required

SkinManager
NEW

    Added Lightweight RenderMode for RadSkinManager

SocialShare
FIXED

    javascript error is thrown when Facebook share and LinkedIn share buttons are integrated in RadSocialShare

Splitter
FIXED

    RadSlidingPane is rendered partially in IE8

SpreadProcessing
NEW

    Introduced support for setting style properties of rows and columns
    Introduced "Summary Rows Below Detail" and "Summary Columns to Right of Detail" properties to control the position of grouping's summary row/column
    Import of the content of macro-enabled workbooks

FIXED

    The SetValue method that takes ICellValue as parameter should throw exception if null is passed as parameter
    RadSpreadsheet crashes when a document with merged columns is imported or exported
    Column style is not properly applied

CHANGED

    Removed obsolete API

TabStrip
NEW

    Lightweight RenderMode for RadTabStrip

ToolBar
NEW

    Added Lightweight RenderMode for RadToolBar

FIXED

    RadToolBar resources are not loaded properly when 'Windows 7' skin is set
    RadToolBar "rtbItemFocused" class is applied to a clicked RadToolBarButton in Chrome and the button remains highlighted

TreeList
NEW

    Added focused states to RadTreeList
    Added Drag icon to RadTreeList

FIXED

    TreeListHyperLinkColumn could not be sorted even when SortExpression property is set
    TreeListDragDrop and GridDragDrop column does not render correct icon in Lightweight render mode
    RadTreeList - AllowLoadOnDemand=True causes design-time error
    When the RadTreeList is initially hidden its columns are misaligned
    In RadTreeList (RenderMode="Lightweight") the TreeListButtonColumn does not render the proper HTML in order to use font-icon for it

Window
FIXED

    The RadWindow Icon in BlackMetroTouch and MetroTouch to be a Window and not a Diskette
    javascript error on closing Lightweight RadWindow in mobile browsers with Behaviors Close and Move and DestroyOnClose set to true

Wizard
FIXED

    When validation of RadWizard control is triggered you need two clicks to invoke a postback

WordsProcessing
NEW

    Introduced a way to obtain the image size automatically when it is not specified. Image can be Size.Empty
    Introduced support for cloning Style, List and ListLevel classes
    Introduced support for value types inch, cm, mm in HtmlFormatProvider
    Introduced support for text direction for table cells
    Introduced right-to-left property of Run and CharacterProperties
    Introduced Replace Text and Replace Styling API
    Introduced watermark support
    Introduced document protection support
    Introduced tab stops support

FIXED

    Paragraph formatting symbol styling is not exported to HTML list items
    Paragraph alignment types (Left and Right) are incorrectly exported to Docx as "start" and "end"
    PageBreakBefore property inserts page break before the first paragraph in the document when exported to PDF
    Importing a document which contains a style without type or style ID causes an exception
    When exporting document with TOC, the tab leader is not visible
    If FontSize element’s value in a DOCX document is a decimal fraction, an exception is thrown and the document cannot be imported

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