When endless scrolling and grouping is enabled on the KendoUI grid, collapsing large groups causes the grid to load ALL the hidden detail rows into the DOM.

 

This takes a very long time for the grid to do, as well it violates the whole point of a paging system. (ie I only want you to load X records at a time). Afterwards the performance of entire website (including the grid) will be very poor since potentially thousands of rows have been loaded into the grid and then immediately hidden. Additionally, these rows do not add any value to the user, since they are all hidden anyways.

 

When a category is collapsed, the grid should NOT add any new rows for that category to the DOM.

 

I have included a sample that demonstrates the performance issues.

I have a list of entities with a large set of fields, but I don't want to load and display all of them in the grid. Entities have also a couple of complex properties which are displayed via checkbox lists.

Though, I want them to appear when editing a single entity.

For now, I'm using custom "create" and "edit" pages, but it would be great to have an "url" option for popup editing. This url would return some html (MVC partial view in my case) which would be rendered in the popup window.

Confirmation messaage required to before delete record from a data grid. It should be looks like 'Are you sure you want to delete the record

Having custom sorting on the grid is really handy. 
But with its current implementation, we are not capable of setting this sorting logic on load.

I opened a support ticket for this issue (see below), and now I'm considering extending this behaviour myself, if I can manage the time that is.

http://www.telerik.com/account/support-tickets/view-ticket.aspx?threadid=931220

However, it would be so much better if this was supported out of the box

http://dojo.telerik.com/IFoYA/2

Bug report

When the horizontal scroll of the grid is shown and is configured for RTL, the resize handle is mispositioned. 

Reproduction of the problem

1. Make the grid scrollable and set explicit widths to all columns.

2. Make the grid RTL.

3. Introduce multi-column headers.

4. Notice that the columns cannot be resized due to the disposition of the handler.

5. Dojo for replication:

https://dojo.telerik.com/IZInOVUd

6. Notice that whenever the horizontal scroll is not present, the resize handle is positioned correctly.

Environment

* **Kendo UI version:** 2019.3.1023
* **jQuery version:** 1.12.4
* **Browser:** [all] 

### Bug report

When the adaptive rendering of the Kendo UI Grid is enabled, the filterMenuOpen event is not triggered.

### Reproduction of the problem

1. Set mobile: true.

2. Attach the filterMenuOpen.

Dojo sample for reproduction:

https://dojo.telerik.com/uhiToseD

### Expected/desired behavior

filterMenuInit event should be triggered regardless of the adaptive rendering mode of the grid.

### Environment

* **Kendo UI version:** 2020.1.219
* **jQuery version:** 1.12.4
* **Browser:** [all] 

Since the 2019 R1 release k-pager-sm (k-pager-lg, k-pager-md) classes are assigned dynamically based on the width of the page to make the component responsive (as I understood from https://www.telerik.com/forums/kendo-ui-grid-pager-not-displaying-properly-in-sass-mode#wn92di5BakmHqrrMfViFxA)

When grids are used on bootstrap tabs (both boostrap 3 and 4) the k-pager-sm class is added incorrectly, causing the pagers on tabs other than the first to be displayed only partially.

A JSFiddle to demonstrate this: https://jsfiddle.net/nqjc4mbu/

The pager on the 1st tab:

And on the 2nd and 3rd tab:

 

(we've solved it with a workaround by dynamically removing the k-pager-sm class again on dataBound, but this shouldn't be necessary)

When performing Edit on a real-time grid, hide edit button to prevent simultaneous editing and data overwrite. 

There was a similar solution previous to signalR integration, http://www.telerik.com/forums/using-kendoui-grid-with-signalr#-3DZMT4HHE-rOWdEf_1mgQ

But with SignalR enabled grid, this could all be  built-in.

Reproduction of the problem

1. In the SASS Theme builder, create а theme based on the Default theme
2. Download it and load it on a page with a Grid

 

Current behavior

On desktop there is a page number duplication: screenshot.
On mobile the page numbers disappear: screenshot

Expected/desired behavior

The pager should look like in the Default theme.

Starting from a Grid's "endless scrolling demo" on: https://demos.telerik.com/kendo-ui/grid/endless-scrolling-remote

Edit grid configuration to set smaller page size. All items of the first page need to be visible on the screen plus some free space. A grid height needs to be set. See this DOJO: https://dojo.telerik.com/amiNohIx

The vertical scroll bar is disabled and there is no way to get/see next pages of data.

Interesting is that use of the horizontal scrollbar (if one is available) starts some background operation (looks as data page load) and then the vertical scrollbar is OK.

The groupHeaderTemplate property for a column can only be set if initializing a grid and defining columns via javascript.

The following post describes the issue and the area that requires modification (Grid._columns):

http://stackoverflow.com/questions/16348291/how-do-i-set-the-groupheadertemplate-for-kendo-grid-column-using-data-attributes

Right now if you want to only show the editor for a column (eg bool field) you have to override the client template among other things and if you want to do it for many fields it can take a lot of code to accomplish.  It would be nice if there were a way to just specify for kendo to only show the editor for the field.

In a grid with 'inline' edit that has rows that are wider the the viewport when entering edit mode the grid now positions on the first editable cell in the grid. This should be the cell that was selected before going into edit mode. In other words the grid should persist its scrolling position.

The grid popup editor is great but when you have a large number of fields to edit the height of the popup window becomes impractical.

What would work much better would be to split the single column of fields into two or more columns making the window wider but shorter and ultimately more manageable.

Maybe the popup could have a "columns" configuration option to allow for this type of functionality.

Please fix the keyboard shortcuts, so they exclude shortcut combination (Ctrl+Return). For example inside the Kendo Grid there is a Shortcut with Return Key (which start the edit mode), but whenever the user do Ctrl+Return the same operation will be triggered.In my point of view the Shortcut should only happen when the user only click the Return Key, any other Keycombination should be a totally different Shortcut.

To me these are all glaring bugs, especially for those who like to use their keyboard instead of their mouse to fill out forms.

1. Mouse scrolling drop downs/comboboxes scrolls the page when it hits the top/bottom.
2. Enter key opens/closes subgrid instead of putting cell into/out of edit mode.
3. Backspace in drop downs causes browser to go back to the previous page.
4. Comboboxes, when filtering, should always "select" the highlighted item when tab is pressed.(the little auto-complete hack/setting doesn't cut it)
5. There is no easy keyboard way to open drop downs and date pickers in the grid.
6. Tabbing to a button cell and hitting Enter does not click the button.

I have an event handler for when a drop down inside the grid changes that calls .set("MyField", myValue).  Behind the scenes, kendo sets the current cell to the first cell in the grid!  I would like the current cell to be preserved so that the grid works for keyboard navigation as well as point-and-click.

### Reproduction of the problem
1. Run the Checkbox selection demo in IE 11.706.17134 - https://demos.telerik.com/kendo-ui/grid/checkbox-selection
2. Try clicking a checkbox

### Current behavior
Two clicks are required to change the state of the checkbox.

### Expected/desired behavior
Checkbox should be checked/unchecked with a single click

### Environment

* **Kendo UI version:** 2019.2.514
* **Browser:** [ IE 11.706.17134 ] 

Enable on-the-fly changes of selectable (selection mode) in the Grid widget

In your grid demos titled "binding to remote data" filter for column ship city when i choose operator does not contain operator and fill "Rio" value kendo grid sends empty filter GET parameter. I have observed similar bevavior in my project.