I found many topics in this forum about empty DropDownDataGrid but there was no answer that could help me. So I have to ask my question. Objectives:
I declared my data source as `rotected List<Bezra.Models.BEZRA.BROMT> bROMTForOMTID;` and it is loaded with data on `async Task OnInitializedAsync() and by the way it is not empty. I defined my DropDownDataGrid as simple as possible
```
<RadzenDropDownDataGrid TItem="Bezra.Models.BEZRA.BROMT"
Data="@bROMTForOMTID"
TextProperty="NAZIV"
ValueProperty="OMTID"
Count="@(bROMTForOMTID?.Count() ?? 0)"
@bind-Value="omtId">
```
Variable omtId has value and proper text is shown in a DropDownDataGrid. So far so good but now comes the funny part, when I push down an arrow to see the list of items it shows nothing but the standard message that there is nothing to show. This is not my first DropDownDataGrid and I implement it in my application at least a dozen times and all of them work well so what is my mistake?