Thank you for writing.
According to the provided screenshot, it seems that you use an old version of the Telerik UI for WinForms suite. In the latest version, RadDataFilter
is integrated into the custom filter popup. Feel free to upgrade in order to benefit from all the introduced new improvements. I am not sure what is the exact format for the date time picker, but the entered string may not be converted to DateTime
if the format is month/day/year. Thus, 31 is not a valid month. In this case, it would be necessary to enter 12/31/2017.
If you are still experiencing any further difficulties, feel free to submit a support ticket where you can provide a sample project demonstrating the problem you are facing. Thus, we would be able to assist you further.
I hope this information helps.