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 whats 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 leak

UI for ASP.NET MVC R3 2017

All components
NEW

    Keyboard navigation improvements
    Increased spacing between checkboxes/radio buttons and their labels
    Notification text color should have contrast
    Kendo UI Scaffolder should use a new VS 2017 extensibility format

FIXED

    Wrong checkbox appearance in different states (hover/focus/checked/unchecked)
    fix: Wrong color in the grid column menu
    DropDowns Popup appears in wrong position in IE in RTL mode when the page is scrolled
    kendo.support.browser miss 'edge' and 'mozilla' flags in TypeScript definitions
    support.placeholder misspelled in TypeScript definitions
    keys.NUMPAD_DOT missing in TypeScript definitions
    clearFileByUid typescript definition
    kendo.support.browser typescript definition is missing edge as an option
    Widget does not position popup element correctly in Windows 8 (touch enabled device)
    Filter popup icons are too close to the text, there is not enough separating space.
    Wrong icons color in Material themes.
    Incorrect icon colors
    The styling/panels demo is not styled for SASS themes

AngularJS
FIXED

    k-ng-model not set correctly with cascading ComboBoxes

Application
FIXED

    MobileView header has zero height when its title has not value

AutoComplete
FIXED

    mapValueTo: "dataItem" option does not apply selection in the list
    The selectedDataItems method returns always only the last selected item
    Incorrect dropdown position when the page is scrolled (IE) and rtl is enabled
    AutoWidth option not working as expected in some cases
    Unexpected padding-right: 1.9em of clearable inputs in RTL

Button
FIXED

    Non-text Image Button image not centered vertically
    Button icons don't align correctly when font-size is bigger or less than 14px;
    Icon Button should be square

Calendar
NEW

    Improved calendar keyboard navigation
    Add multiple date selection to Calendar

FIXED

    Hover style is not removed from navigation arrow when it becomes disabled
    Widget "century" view does not support min value equal to "0001-01-01"
    Widget "century" view does not support dates less then 200 year
    Inconsistent appearance on hovering first/last year in Calendar decade view with Default, Black, Blue Opal, High Contrast, Moonlight, Silver and Uniform themes 

Chart
NEW

    Range Area Chart
    Chart rtl support

FIXED

    Normal area series and reversed area series in one chart is not working
    An error is thrown when setting series.line.style "smooth" to any of the series except the first one in area chart
    getAxis does not return axis in a custom visual handler during the initial rendering.
    Grouped Line Chart data disappears from 2017 R1
    Justified category axis could lead to missing dataItem in point tooltip template
    Line chart with invisible points fails to render
    Pie chart hangs browser on some values
    Labels are needlessly rotated when using auto rotation and reversed axis.
    White space in text is collapsed when rendering as SVG

ComboBox
FIXED

    k-ng-model not set correctly with cascading ComboBoxes
    ComboBox dataSource query() method throws an error when a configuration object parameter is set
    mapValueTo: "dataItem" option does not apply selection in the list
    SelectedItem in ComboBox cannot be removed (trough X button) in AngularJS scenario
    Top group header stays displayed, even when there are not matches.
    Loader is displayed in DropDownList/ComboBox when remote request is prevented on requestStart
    Cannot select Item with value 0 in ComboBox and DropdownList
    Mouse cursor automatically moved at the end of the text in the ComboBox input
    Incorrect dropdown position when the page is scrolled (IE) and rtl is enabled
    AutoWidth option not working as expected in some cases
    Dropdown height is incorrect when there is h* element in HeaderTemplate
    Widget doesn't keep caret position on typing
    Unexpected padding-right: 1.9em of clearable inputs in RTL

DataSource
NEW

    Grid infinite scroll
    Improving performance with paging and sorting of DataSource with local data

FIXED

    DataSourceRequest Error is thrown in Kendo.MVC for asp.net Core 2.0 web application targeting .NET Framework 4.6.1

DatePicker
FIXED

    Hover style is not removed from navigation arrow when it becomes disabled
    Maximum call stack size exceeded if en-US culture is used with DatePicker
    Kendo UI DatePicker and DateTimePicker MVVM initialization ignores data-week-number option

DateTimePicker
FIXED

    Hover style is not removed from navigation arrow when it becomes disabled
    Maximum call stack size exceeded if en-US culture is used with DatePicker
    Kendo UI DatePicker and DateTimePicker MVVM initialization ignores data-week-number option

Dialog
FIXED

    Errors for Alert, Confirm and Prompt when building kendo typescript definitions using Typescript version 2.4
    Displaced Dialog close button

Drawing
FIXED

    grid widget extension — drawDOM / pdf.saveAs — headers do not repeat when repeatHeaders true
    Path is not drawn correctly by Drawing API
    White space in text is collapsed when rendering as SVG

DropDownList
FIXED

    DropDownList with virtualization enabled and pageSize set throws js exception (MVVM binding)
    Double-clicking on a DropDownList makes it constantly focused
    mapValueTo: "dataItem" option does not apply selection in the list
    Loader is displayed in DropDownList/ComboBox when remote request is prevented on requestStart
    Cannot select Item with value 0 in ComboBox and DropdownList
    Filtering closes the keyboard in Android
    Incorrect dropdown position when the page is scrolled (IE) and rtl is enabled
    AutoWidth option not working as expected in some cases
    Dropdown height is incorrect when there is h* element in HeaderTemplate
    Keyboard navigation is not working when mapValueTo: "dataItem"

Editor
NEW

    Allow customization of the columns of color picker tools' palette
    When the selection is in the begging of a non first list item and backspace is clicked, its content should be moved to the the previous one.
    Insert images into editor content via drag&drop from local file system

FIXED

    Editor's resize handle overlaps the vertical scroll bar's down arrow
    Editor tools icons color is not consistent in all themes
    Kendo loader does not hide after successfully deleting an image or deleting / creating a new folder in Editor's Insert image dialog
    Kendo Editor with textarea does not trigger the document's change event
    Broken layout of Editor's Image/File Browser dialog toolbar, if font-size is not 12px in all LESS themes
    Bullet list wrong cursor position after deletion

FilterMenu
FIXED

    Menu closes after context menu of the browser is opened and hovered.

Gantt
FIXED

    Gantt toolbar border radius does not use variables in Bootstrap v3 theme
    Gantt always escapes HTML elements passed as part of its Header Templates
    Displaced Gantt task percentage complete handle
    DateTime pickers on the Gantt edit form are wider than the other inputs in Material, Fiori and Nova themes
    Gantt task displacements in Material, Material Black and Nova themes in RTL
    Illegible Gantt tasks text in Office 365 theme
    Inconsistent appearance of Gantt Views chooser with Fiori Theme

Globalization
FIXED

    Some culture files are outdated due to differences between Windows 8 and Windows 10 date formats
    Wrong number formatting in es-SV culture (possibly others too)

Grid
NEW

    Persist dirty indicator with batch editing and client-side operations
    CRUD operations with virtual scrolling
    Grid keyboard navigation improvements.
    Grid infinite scroll
    Improving performance with paging and sorting of DataSource with local data

FIXED

    The Grid PDF export produces misaligned footer template when there is a hidden column.
    Column menu icon in Grid headers are broken in SASS themes in IE
    Grid "selectable" column does not remove the selected state from the unlocked columns table
    If paperSize option is used together with footer template pdf export is misaligned
    When an input element is focused, the Grid will not receive the focus when clicked, and the keyboard navigation is not working.
    Grid Filter Checkbox not cleared on filter click
    The page size dropdown instantly closes in Chrome
    When the Grid is with persistSelection the selectedKeyNames method will still return the selected IDs after the clearSelection metho is used.
    Wrong color in the grid column menu
    The DropDown used for chaning the Grid current page, is not closing on mobile devices when clicking outside of it.
    Grid deselecting all rows with master checkbox fires change event two times
    Keyboard navigation should persist column index
    Sort icon in grouped item is broken.

HierarchicalDataSource
FIXED

    Filter with empty object and array is not clearing the hierarchical filter
    "Maximum call stack size exceeded" error thrown by the HierarchicalDataSource with remote data and client-side filtering
    HierarchicalDataSource filter not working with serverFiltering true
    "Maximum call stack size exceeded" error thrown by the HierarchicalDataSource

Map
FIXED

    Icon of map's marker is displaced in LESS themes.

MaskedTextBox
Menu
NEW

    Allow openOnClick configuration for rootMenuItems and subMenuItems

FIXED

    Menu closes after context menu of the browser is opened and hovered.
    On root Menu item click its opened submenu closes (IE)
    Menu's width is calculated as zero, when scrollable is enabled and the menu gets hidden in 700px screen size
    Cannot fire select event with encoded: false in Menu
    Kendo Menu k-state-focused bug
    Focused Menu items are not highlighted in Material, Material Black and Office 365 themes

MobileView
FIXED

    MobileView header has zero height when its title has not value

MultiSelect
FIXED

    mapValueTo: "dataItem" option does not apply selection in the list
    MultiSelect items appearance is wrong when placed inside a Grid popup edit form (Nova theme)
    Incorrect dropdown position when the page is scrolled (IE) and rtl is enabled
    AutoWidth option not working as expected in some cases
    Dropdown height is incorrect when there is h* element in HeaderTemplate
    No style is applied to the Multiselect focused items if they are already selected
    Unexpected darker corners of Multiselect when not hovered in Material theme
    Incorrect position of MultiSelect's item close icon with Material, MaterialBlack, Nova and Fiori themes

NumericTextBox
FIXED

    NumericTextBox does not allow currency character to be pasted together with the numeric value

PDF Export
FIXED

    The Grid PDF export produces misaligned footer template when there is a hidden column.
    text-transform: uppercase is ignored on PDF export
    Kendo UI Drawing Api with IE Edge misalignment
    Links which wrap a img element are not exported as expected on PDF.
    If paperSize option is used together with footer template pdf export is misaligned
    Generated pdf document cannot be saved using saveAs

Pager
FIXED

    The DropDown used for chaning the Grid current page, is not closing on mobile devices when clicking outside of it.

PanelBar
FIXED

    PanelBar node's aria-hidden attribute on ul elements is not updated on interaction with nodes
    PanelBar node's aria-expanded attribute is false for initially expanded nodes
    Images are not vertically centered PanelBar with Fiori, Material, Material Black, Nova and Office 365
    Sprites are not vertically centered PanelBar with Black, Blue Opal, Bootstrap v3, Default, Fiori, Flat, High Contrast, Metro, Metro Black, Moonlight, Nova, Office 365, Silver and Uniform themes

PivotGrid
FIXED

    PivotGrid renders some footer values as member values after collapse
    PivotGrid does not display all sub fields after reordering.

Scheduler
NEW

    The view() method is documented as void, but it returns an object
    Allow time slot start and end times to span between 2 days in Timeline view
    Selected events between resources and add ability to deselected with ctrl

FIXED

    group.date throws an error when no group.resources are set
    Keyboard navigation beyond the date set to the Scheduler's max option crashes the browser
    Moving a Scheduler event across the Daylight Saving Time transition date adds hours to its duration
    Scheduler "Today" button does not navigate to the correct day according to the timezone set
    Dragging a Scheduler event to the AllDaySlot and back changes the event's duration
    Scheduler does not display event on the spring daylight saving day with workDayStart configured
    Scheduler throws n.innerRect is not a function error when creating an event with duration of 24 hours, which spans over the spring daylight saving change
    Scheduler incorrectly calculates recurring events start/end time in daylight saving scenarios
    Event view of the mobile Scheduler with Flat theme has missing icons and misalignments.
    Cancelling Edit on Recurring appointment removes the 'edited' occurence from UI
    When start editing a single occurrence of reoccurring event, change Start time or All day value and then cancel the edit, the event disappears from Scheduler
    Event created on 10/30/2016 is not rendered in DayView
    Scheduler throws n.innerWidth is not a function(…) error, when creating an event with duration of 23h or more on the day of Daylight saving change
    Scheduler generates incorrectly recurring daily events (every second day), when created before daylight saving change and ending after that
    DST recurring event is not rendered correctly, when Scheduler and events are in different timezones
    Buttons are displaced in 'Delete Recurring Item' dialog with Material skin
    Scheduler does not expand recurring events with 2 weeks interval
    Occurrences are rendered unexpectedly
    Widget does not expand 'daily' frequency with interval:2 correctly
    Missing Scheduler View chooser toggle arrow

Spreadsheet
NEW

    fix(spreadsheet): Use font icon for page orientation preview in export dialog
    Improve performance of copy-paste from Excel to Spreadsheet
    Keep all values available in the column filter menu, even if filter by value has been already applied

FIXED

    Wrong number rounding when cell format is applied to a formula
    Editing a range selection doesn't allow tabular editing
    JS error on undo after pasting text from external source in Spreadsheet cell
    String starting with a date (Mar 2017 randomText) is converted to date on pasting in a Spreadsheet cell, stripping the non-date part
    Spreadsheet freeze panes + borders on merged cells results in missing borders after scroll
    Spreadsheet "sort" breaks formula cell references [fix included].
    Spreadsheet export to Excel does not work if there is a merged cell in row 10+
    Applying filter by value and then filter by condition on the same column results in an error
    Spreadsheet steals the focus from the focused element when keyboard down / up arrow is pressed
    defaultCellStyle could not be set on the Spreadsheet
    Spreadsheet loses Time, when editing cell with custom Date and Time formatting
    Editing cells in range, when filter is applied, modifies the cells in between
    Bad icons in Spreadsheet's Export PDF dialog
    Spreadsheet destroy method does not terminate the widget completely.
    Change the icon of the Export button
    Missing Spreadsheet toolbar buttons localization
    Undo is not triggering the change event
    resize method does not resize the toolbar
    Cannot choose from all items when filtering is applied once
    12 hours format time in lower/upper case is not respected
    Displaced Spreadsheet dialog buttons
    Input in Spreadsheet's Hyperlink dialog falls on a second line below its label

Switch
FIXED

    Switch labels are not displayed in IE9 

TabStrip
FIXED

    insertBefore and insertAfter fail when TabStrip has an ID with special characters
    "k-state-active" class is added to the selected TabStrip tab after its content is loaded
    Tabstrip's scroll buttons positioned incorrectly
    TabStrip tab content receives incorrect height of 0px after being disable and re-enabled, with custom animation configured.
    TabStrip's right scroll button is not visible on resizing window
    JavaScript error on scrolling TabStrip tabs, if animation is disabled with jQuery.fx.off
    Setting scrolling: true disables the TabStrip's scrolling tabs
    Unexpected TabStrip tabs top border in High Contrast theme
    Pressing Down key in TabStrip with dir=rtl should navigate to next item instead of the previous one.
    Disabled tabs in the Bootstrap skin have borders

ThemeBuilder LESS
FIXED

    Gantt toolbar border radius does not use variables in Bootstrap v3 theme

ThemeBuilder SASS
FIXED

    Unexpected second vertical scrollbar on ThemeBuilder preview pages in Firefox

TimePicker
FIXED

    TimePicker does not preserve the new value when dateInput is enabled

ToolBar
FIXED

    Non-text Image Button image not centered vertically
    Pressing Down key in ToolBar with dir=rtl should navigate to next item instead of the previous one.
    Toolbar's overflow button in RTL mode scrolls page to top under IE
    ToolBar buttons lose their right :focus border for Material and MaterialBlack themes, when another button immediately follows the current one

Tooltip
FIXED

    Tooltip width is not calculated depending on the content length
    Tooltip does not hide as expected when another Tooltip is opened
    Title element is not removed on time in IE11

TreeList
NEW

    TreeList keyboard support.

FIXED

    TreeList column attributes are not applied in edit mode.

TreeView
FIXED

    Unclickable Template Checkboxes in TreeView
    Correct insertAfter and insertBefore return value in API
    TreeView should mark all non-selected nodes with aria-selected false attribute
    Unexpected increased spacing between nodes and checkboxes in TreeView
    Unclickable Template Checkboxes in TreeView

Upload
FIXED

    Dropping folder with more than 100 files in it uploads only 100 files
    Upload widget with custom template can never retry an upload

Window
FIXED

    Window with pinned: true and defined position in percent sets incorrect position on open
    Setting and removing of overflow:hidden style on the document during Window maximization and restore should check if the style is already present
    Focusing a textbox nested in Window does not highlight its text
    Incorrect navigation with Tab in Window
    k-window-content box-sizing changed between 2017 R1 and R2
    Window resizing does not work correctly when the widget is pinned and the page is scrolled
    Resizing doesn't work properly when Window is appended

Wrappers (ASP.NET MVC): AutoComplete
FIXED

    Missing Virtualization setting MapValueTo 

Wrappers (ASP.NET MVC): ComboBox
FIXED

    Missing Virtualization setting MapValueTo 

Wrappers (ASP.NET MVC): DateInput
Wrappers (ASP.NET MVC): DropDownList
FIXED

    Missing Virtualization setting MapValueTo 

Wrappers (ASP.NET MVC): Grid
FIXED

    No method for attaching FilterMenuOpen event in MVC Grid HtmlHelper
    Allow EditorTemplateName to be set through GridColumnSettings
    Custom filter options are not localized in Grid HtmlHelper
    The VB MVC version of the Telerik project template compiles correctly, but when run throws an error

Wrappers (ASP.NET MVC): MultiSelect
FIXED

    Missing Virtualization setting MapValueTo 

Wrappers (ASP.NET MVC): TabStrip
FIXED

    TabStrip wrapper always renders an anchor element even if the tab's URL is not set 

Only for V.I.P