Hi,
I have been stuck with this problem for weeks now and I can't figure it out.
In my datagrid, I have a property "TestEtanchieteExternes" that is a collection because I'm calling a foreign table and I would like to manage my filter. However, it gives me this error :
I believe the reason is that it's acting as if TestEtanchieteExterne is a single value when it's actually a collection.
How can I fix this ? I believe I need to point to the first item in my TestEtanchieteExterne collection in Property attribute but I don't know how to do that.
Thank you. I don't have that error anymore. However, what am I supposed to do in the FilterTemplate ? In the picture you can see that I already use it. Should I call LoadData() in my OnSelectedOrificeChange() method and try to pass the Orifice's filter value to it ?