When the grid is refreshed with grid.refresh(), regrouping and resorting is not done automatically; as a result, any updates to the underlying dataItems that affect sorting or grouping are not reflected in the grid. That level of control should be available to the developer. Therefore, I would like to suggest that the grid.refresh() method accept an optional configuration object:

var options
 = { resort: true|false (default), regroup : true|false (default)}
grid.refresh( options )

In this way, if the grid is groupede by [department] for example, and the [department] of certain rows is changed programmatically via dataItem["department"] = somethingDifferent, when the grid.refresh ({regroup: true}) method is invoked with the optional argument, the grid would be regrouped, reflecting those changes to the rows' dataItems.

Now, we create a confirm window by these code:

$(".exitBtn").click(function(e){
    e.preventDefault();
    var exitWindow = $("<div class='p20 tac' />").kendoWindow({
        title: "exit...",
        resizable: false,
        modal: true
    });
    exitWindow.data("kendoWindow").content($("#exit").html()).center().open();
    exitWindow.find(".confirm,.cancel").click(function() {
        if ($(this).hasClass("confirm")) {
            alert("blabla...");
        }
        exitWindow.data("kendoWindow").close();
    }).end()
});
<script id="exit" type="text/x-kendo-template">
    <p>blabla...</p>
</script>

It's so complicate!!!!!!!!!!
I want to coding in this way:
$(".exitBtn").click(function(){
    $("<div class='p20 tac' />").kendoWindow({
        title: "exit...",
        content: "<p>blabla...</p>",
        resizable: false,
        modal: true,
        center: true,
        okVal: "Exit",
        cancelVal: "I don't",
        ok: function(){
            alert(Exiting...);
        },
        cancel: function(){
            exitWindow.close();
        }
    });
});

Add similar functionality as AngularJS has:
http://mgcrea.github.com/angular-strap/

This is probably a Reporting Ask but it would be great to have a Telerik Reporting Viewer written in KendoUI/HMTL5/JS so that we can integrate with Telerik Reporting and Keep the client code clean.

Listview scrolling becomes very laggy after more than 30 or so items are bound via endless scrolling or pull-to-refresh. In the article below by Chris Love he discusses Facebook's decision to abandon html5 for native apps and states the fault isn't necessarily with html5. He suggests techniques such as removing DOM elements when the markup is scrolled far out of view and not reachable with 2-3 flicks that could drastically improve performance for scenarios such as the Facebook infinite scroller. Would it be possible to implement a performance-enhancing technique such as this as a built-in feature of the KendoMobileListView scrolling? I have already made it a practice to never use With Blocks in my ListView item templates by assigning { useWithBlock: false } and would appreciate any other performance optimization options.

http://professionalaspnet.com/archive/2012/12/27/Don_2700_t-Make-Facebook_2700_s-Mistake_2C00_-Architect-for-the-Modern-World.aspx

When a class is added to grid row at runtime to enable so-called conditional styling, which is based on the values in one or more cells  (e.g. if status="urgent" font color=red) and then the grid is grouped by the user, the added class seems to get lost in the shuffle -- it does not "travel" with the row to its new location and so the conditional styling disappears. I'm not sure what goes on behind the scenes during a grouping operation, but if it is possible to preserve custom classes  added at runtime so that they survive the grouping operation, please implement this feature.

Our apps require refresh of the grid's underlying dataset every 15 seconds. By default, this refresh expands all groups. With a couple of enhancements to the grid, we can create a map of collapsed groups and recollapse them after a call to dataSource.data(someNewFreshData). We need two events, groupCollapse and groupExpand. And the k-grouping-row needs a custom data attribute data-k-distinct-values which contains a JSON representation of the array of distinct data values of the current group. For example, if the grid were grouped by state by city by zip, the custom data-k-distinct-values attribute for one of the groups in the grid might contain this hypothetical data: "['California','Beverly Hills','90210']". WIth these complementary enhancements, we'd have all we need to store a map of collapsed groups that we could use to fnd these groups again after a call to dataSource.data(someNewFreshData).  The new data has the same schema as the previously bound dataset.

Currently in Kendo UI if a user sorts a grid column and leaves the page, when they come back the sorting has been reverted. I think there should be a way to automatically save the grids sorting state (potentially in cookies) so that when a user leaves the page and comes back, the state is how they left it.

Add client-side filter method that automatically updates the filter menu options (dropdowns and values) according to the filters described in the filter expression.

Please render the text labels and checkboxes with the valid markup so that selecting the text gives focus to the related checkbox.

ie.
<span class="editor-field">
  <input type="checkbox" id="treeItem1" value="1">
</span>
<span class="editor-label">
  <label for="treeItem1">Tree Item 1</label>
</span>

ForeignKey coloumn failed to validation if option label value ("Select value") is selected.

Kendo UI layout is not working correctly in IE 7

Enhance the RTL support because if you check list view control at demo page and click RTL u will see that the pager still not switched rtl 

While KendoUI Mobile has a nice and customizable iOS switch component, based on CSS and fonts, I want to suggest including to the framework also a language independent generic graphical switch component, where the ON state has an 'I' symbol and the OFF state has a 'O' symbol. This could be used as an alternative to the current CSS-version. Purely graphical version would ensure the native looks, which you can see in my forum post attachement here:

http://www.kendoui.com/forums/mobile/switch/generic-i-o-style-switch.aspx

We are using the kendo dropdown widget and noticed that the performance degrades quite drastically if it contains more than 100 items. Can you investigate performance improvements even for larger item sets?

Is there any way to implement checkbox list using kendo web?

I moved from Silverlight to HTML/KendoUI for building RIAs. One feature I am accustomed to using is the template selector. 

For instance I currently have a situation where I display an editable list of policy holders using KendoUI. However a policy holder could be a person or a business and different fields/labels should be shown depending on the source object. 

As a workaround I have conditional logic in the template itself, but it isn't pretty.

Please add template selectors for all list controls so that it is easier to style items.

This bug is visible in your demo at http://demos.kendoui.com/web/grid/editing.html.

When using a scrollable, editable grid in IE (9 or below):
•	Scroll down so that the first row of the grid is no longer visible.
•	Click on any row.
•	The grid jumps back up to the original "unscrolled" position. (In your demo, on my screen, this means that only the first 10 rows are visible.)
The result is that I am unable to edit any row outside the first 10, unless I use the keyboard to navigate.
This does not occur in Firefox, Chrome, Opera, or Safari - only in IE.