Tried to implement the SimpleWithMenu in the DataGrid with no success. Went to the DataGrid Filter Simple with Menu and the demo did not work either. See below
This was tried with contains, not contains, beings with and ends with. None worked as I would expect. The numeric filtering seems to work as well as the field with only the customer names but the column with the employee names and image does not work. Also the date columns filters do not work either. Also multiple filtering does not work.
I have tried the advanced filter and that seems to work as expected. I will be using the Advanced Filter mode until that can be fixed.
UPDATE: The multiple filtering works as expected. I overlooked the dropdown to set the conditional. However the filtering on a column with a template and/or the date still fails. Also when filtering on a template using Advanced filter mode while setting the FilterProperty returns a NullReferenceException.
@enchev If you look at your screenshot and compare to mine, you will see that they are different. In order to reproduce the same issue I reported you would need to execute the same steps and attempt to apply the same filter. You are applying a single column filter on the Ship Country. In my screen shot you will see that I first applied the filter on The ship name which applied successfully. Then attempted to apply a second filter, as explained in the post 'multiple column filters', this did not work. Does not look like in your screenshot that you tried multiple column filters just a single column filter. Also in the beginning of my post the single column filter that did not work was on a column that has a template with an image in it. The image is not relevant as much as the template that is. However if you attempt to perform a filter on the templated column it will fail. This is the same for the date column filters.
Also I had stated that the Advanced filter worked. I was incorrect, it too has an issue with a template column. I attempted to add the property of FilterProperty with the value of the context property to the column tag with fully qualified context name and property as well as just the property. Regardless of what I put as the FilterProperty a null reference exception was thrown.
Not in the office today but if you need the stack trace on the exception I can provide that Monday.