It would be nice if all dropdown list controls (dropdownlist, radcombobox, etc) had a built-in "x" button somewhere which allowed the user to clear the selection of an item (ie set its selectedIndex to 0).

Clicking on the "x" would also fire the client-side and server-side (if applicable) SelectedIndexChanging and SelectedIndexChanged events.

RadEditor's RTF convertor improvements.

The new scaffolding capabilities in ASP.NET web forms are great for productivity.

I'd like to see Telerik-specific scaffolding that substituted Telerik controls.

Integration with SP Ribbon

The current filtering of the grid wastes a lot of screen space If for example I want to filter a column to have values between X and Y. the column width especially on date column will need much more space for the filter than for the data actually shown.
On the current filter of the grid the user cannot filter on columns he is not seeing

My proposed implementation is simple but should work:
The control will be similar to the Menu control and will render just like in the video two lines of filters: static and optional. It will have a filters collection. Each filter will have these basic properties:
1. AlwaysDisplay - if true the filter is always displayed and cannot be removed.
2. Displayed - if true the filter is displayed. if not it is displayed on the static list last button as an optional filter
3 Type - Can be single value, Multiple values (checkbox list), Single date, Date range, Textbox (for free text search in all of the columns). obviously with needed properties for values etc.
4. Text - the name of the filter
5. The actual property to filter by
* pressing each filter will display a popup similar to the Custom menu sample with the needed filter type. selecting the value will update the filter text shown.
* the static filter list will show a button for optional filters which can be shown on the line below. filters on the optional line can be removed with a click on a X button
* all UI changes (adding/removing filters) should be on client side so the control will be very responsive.
* over time filters can evolve so that the date range filter popup for example can show except for the obvious option of from X to Y other options for the user (e.g. last X weeks/days/years) and other ideas shown on the video I sent you
The result the control produces is a LINQ expression which can be applied to the data source in a LINQ Where statement (my usage case) or other values (SQL where statement) that can be used by other users.


The proposed new control has the following advantages:
1. It can be positioned anywhere 
2. It can show fixed filters and optional filters
3. It can filter based on columns not visible on the grid
4. Optional filters can be removed quickly with the X button which provides faster change of filters for the user.

The end result of this filter is a much easier UX for filtering data. it uses far less screen space and is modular enough for future columns and to filter data sources for things other than the grid

We could use a new calendar control that works differently than the scheduler, or any existing calendar control. 

Overview of features and how it would work:

• User selects a month, the calendar auto draws the month as a calendar view with options to set day of week as short, medium or full length.
• The calendar has an input field which can handle validation if needed. Validation example:
  • Only accept integers
  • In logic, if X = Whatever, then only allow input value of 1.

• Treat as an array so we could loop through the control and read each value for saving to database or to take action on from code.

• Example shown below. This is dynamically creating using tables and HTML. Not the nicest looking, and a pain to reuse anywhere. We could make use of this type of control in a lot of applications.

   

Instead of pages like this, which exist for every control and aren't very helpful:
http://www.telerik.com/help/aspnet-ajax/scheduler-appearance-skins.html

I think the skins page should actually render the control and allow developers/designers to select a skin from a drop down to properly demonstrate how the control appears in that skin. 

The logic behind this is somewhat similar to the property explorer pages. As with the property explorer pages, the RenderMode should also be selectable from the proposed skin page because it affects the way the skin is rendered. 

Without this feature I find myself starting a test page, typing in a skin name, save changes, load page, new skin name... repeat, repeat. Please add this feature to make this process a whole lot easier.

One should be able to use CDN without having the Telerik.Web.UI.Skins dll deployed to the server..

This diagramming tool can provide a toolbox with different models that can be dragged onto the canvas, edited, resized, rotated, etc.
Additionally a hierarchical model can be implemented that link different models on the diagram.

In the same way that ASP.NET MVC wrappers are supported...

The functionality for strongly typed model-bound controls provides a significant boost in re-usability and ease of development. The documentation and support for this feature is, for all intents and purposes, non-existent.

Please provide demo applications for each data-control capable of model binding with full code showing how the make the feature work.

Capabilities should include common usages such as placing a drop-down list into a radgrid row, CRUD, filtering, and data-annotation and validation.

Create a tool that allows a powerpoint to be displayed in a web page.  
Extra bonus if it's able to include sound.  
It should have the usual controls at the bottom - forward, back, beginning, end.
The powerpoint page would change based on user clicks.

You need to support touch capabilities in your ASP.Net controls. Drag and drop and swiping are critical to my apps that I build for the PC. With Windows 8 and touch screen monitors now prevalent, you need to support them!

Examples:

http://demos.telerik.com/silverlight/#Treemap/AbsoluteValueBrushColorizer

Add your own example or features you would like a treemap control to have by commenting below.