Kendo grid doesn't have in-built functionality to prevent row selection based on some condition.
One way is to remove css class "k-state-selected".
But i think there should be something like "changing" event which will be called before "change" event.
In that event developer write code and can cancel "change" event.
Or 
Boolean property something like "enabled" at row level (or cell level for cell selection) .

New items (rows) are not shown in grid when they don't match the filter settings made to the grid.
So it would be really useful if applied filters and sortings were resetted when new items are created.

I know it is possible to show/hide columns through the column menu, but there is something odd about being able to hide one column from another column's menu. Alternative is to implement something yourself and use the API to show/hide a column, this seems like something that should be an option in the grid. I am imagining a column chooser button (perhaps in the top left header) that opens up a list of checkboxes similar to what you see in the column menu.

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.

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.

when putting grid into new item creation state it should be possible to put new item with some predefined fields.

Current it is realy difficult to achieve that:

using datasource and insert do not contain isNew on model, also put it on top of grid page is difficult, not possible

using model.set. on edit event causing fireing save event when it should be fired only when item is realy saved.

Currently the new select column and the "selectable" setting of the grid are mutually exclusive.  This seems completly counter intutive.  If you you have a select column and the "selectable" mode set to "multiple", then when you drag select or ctrl click on row the checkbox to be selected.  Right now it's not.  

In the JQuery Grid if you have the following column definition (for example):

[
    {
        "field": "Name",
        "title": "Name"
    },
    {
        "title": "Address",
        "columns": [
            {
                "field": "Street",
                "title": "Number & Street"
            },
            {
                "field": "City",
                "title": "City"
            },
            {
                "field": "PostCode",
                "title": "Post Code"
            }
        ]
    },
    {
        "title": "Contact Details",
        "columns": [
            {
                "field": "Email",
                "title": "Email Address"
            },
            {
                "field": "Phone",
                "title": "Phone Number"
            }
        ]
    },
    {
        "field": "DOB",
        "title": "Date of Birth"
    }
]

When you drag the multi-column header "Address" and drop it over "Date of Birth" the header and it's child columns move as expected but the column headers in the two multi-columns get mixed up.

This only seems to happen when dragging a multi-column past another multi-column in either direction.

Currently having a column format of "{0:#}" does not infect the filters format. E.g. 5 becomes to 5.00 on blur event in filter dialog. So we have to modify filters behaviour manually which is a pain. Currently we are using this function:


function configureFilterFormatting($grid) {
    var kendoGrid = $grid.getKendoGrid();
 
    kendoGrid.bind('filterMenuInit', function (event) {
        var column;
 
        $j.each(event.sender.columns, function (index, item) {
            if (item.field == event.field) {
                column = item;
                return;
            }
        })
 
        if (!column) {
            throw new Error('Invalid column');
        }
 
        if (column.format) {
            // Transform '{0:#}' in '#'
            var format = column.format.replace(/^{0:/, '').replace(/}$/, '');
 
            event.container.find('[data-role=numerictextbox]').each(function () {
                var $numericTextbox = $j(this);
                $numericTextbox.getKendoNumericTextBox().setOptions({ format: format })
            });
        }
    });
}

In google datavisualization grid, one can use cell formatters to add an excel type visualization to a cell. This could be a bar left to right showing the relative size of a value to the rest of the values. This could be an arrow comparing the result to another column either hidden or visible. This could be a color showing between red and green. The color could for instance get closer to red as they get more below 0. This is an amazing feature in google and easily configurable. It would be great of your grid could do the same.

I have a grid with Column Employee Name and i have Employee names as John and john. As you see the names are same but case sensitive is different. When i group the column Employee Name. The Kendo grid treats it as separate values.

When using setOptions and loadOptions to allow users to save their personal configurations of a grid, it would be nice if I didn't have to manually add all of the templates to the options object before calling setOptions. Without that step, columns using view templates appear with the raw data. To add the templates to the options object, I'm forced to separate them out as functions instead of leaving them inline with the column definition.

The current method of selecting the item to filter forgeinkey column is not useful for a lot of records.
It is necessary to enable the filter template customization, or add search/autocomplete to current filter template.

Currently the only way to make column headers fixed and always visible as you scroll through a Kendo Grid is to make the height of the grid fixed. This doesn't allow responsive UI and dynamic sizing of the grid. I would like to see support for having fixed headers regardless of height of the grid, such that the grid may fill whatever container it's in and change size while allowing this.

This Telerik response confirms the current functionality:

https://www.telerik.com/forums/columns-header-always-on-top

Please add a simple way to add column calculations to the grid. From simple addition and multiplication to complex calculations across grid columns. Key features would include:

Calculations fire on key up key down events for selected cells
Formula builder like excel
Calculated fields automatically save to db on save
Calculated fields included in aggregates in footer

Thanks!

I do not understand the rational behind this behaviour other than it is easier to implement than what I would consider normal multi-select behaviour.

Multi-selection should be enabled by holding down the ctrl or shift key to select non contiguous or contiguous rows like every other application on earth.

Using the mouse in this manner also prohibits the ability to drag rows which has also been raised on this forum.

Lastly, almost every js based grid I've ever seen, KendoUI included cannot handle multi-select AND virtual paging. Once selected rows go out of scope, they will not be re-selected when back in scope.

Be the first to market on this feature and trump your competition. It is a hard feature to implement, but one that is surely worth the bragging rights.

Multiple String searching in standard filter.

Today the basic Grid filter for strings can be used to search for 1 or 2 items at best.  It would be great to be able to filter for > 2 items from 1 column at a time.  

A multicheck box filter does not work so well when you have 100k+ items, and the multicheckbox ends up with 1000s of items in it.  A string search is more appropriate for the end user.

Our current grid a user can filter for upwards of 500 strings of text in one column by treating the input as a textarea that is styled to auto-grow and is not resizable.

Please implement multi-row drag-and-drop in the Grid widget.

It would be useful to add resize to content support for a grid column.
 
Also, resizing has the following issues:
1) The last column is difficult to resize as the right resize cursor is not visible after you reduce its size the first time
2) If you reduce the size of the last column, the background of the grid area is displayed. This is not ideal, it would be better if the row style (e.g. alternating) fills the empty space (add an empty column?)

Thanks!
Giuseppe

Add Shift+Space support in Grid to select contiguous rows using keyboard navigation. Currently, if the user wants to select 50 contiguous rows using the keyboard, he/she needs to hit Ctrl+Space 50 times.