Hi Martin,

The Add Multi-Check Filter to Grid in Row Mode article is the easiest available solution. When ColumnMenu() is turned on it brings the entire menu to the filter row, not just the filtering. There is no way to isolate the filter span because, it doesn't exist until we open the menu for the first time.

Alternatively you could use your own custom template for the filterable cell.

.Filterable(f => f.Cell(c => c.Template("rowFilterTemplate").ShowOperators(false)))

You can access the input field element through the function.

<script>
function rowFilterTemplate(data) {
        var element = data.element; // The input element.
    }
</script>

You can then create a kendo widget that is bound to this element. For example a DropDownList would look like this:

element.kendoDropDownList({
            dataSource: [{ MyField: 10 }, { MyField: 20 }],
            dataTextField: "MyField",
            dataValueField: "MyField",
            optionLabel: "--Select--",
            valuePrimitive: true
        });

However in this scenario you would need to provide a dataSource containing all the values for a particular column. Implementing this approach would take a lot of effort. My recommendation would be to stick with the above article. In case you haven't upvoted this Feature Request yet, feel free to do so.

The more upvotes a Request has, the better the chance it will get added.

Best Regards,
Georgi Denchev
Progress Telerik

This indeed is not supported out-of-the-box.

Note that a possible alternative might be a combination of multi-checkbox filtering and standard filters by leaving the default filtering enabled for the corresponding grid column. See how this is done for the UnitPrice and Country columns in this example:
http://dojo.telerik.com/aRomO