Radzen fails to set DataGrid's type

[kim]

Hello @Team,

There has been a frequent bug when setting the type of the DataGrid component in some pages. Here's one example:

protected RadzenGrid<Front.Pages.PersonListComponent> dataGrid;

The type is set correctly if I simply remove the filtering from the Data property:

protected RadzenGrid<Global.Models.Database.Entity> dataGrid;

In both cases I'm manually setting the TItem attribute to Global.Models.Database.Entity, which is in a class inside the same project. Each column also inherits the TItem property as it should:

Any possible workarounds?

[korchev]

I recommend applying the filter when setting the property. Use a Linq expression for a component property will make it evaluate on every StateHasChanged and always rebind the grid. So the solution is to create a page property which has the filter applied e.g.

set the filteredPeople to o ${people.Where(p => some expression)}

[kim]

Worked like a charm! I wasn't aware of this auto rebinding in Blazor.

[kim]

Of course there's always a but.

Using the old method, the data was filtered immediately after changing the filters:

The recommended solution, however, requires some action in the DataGrid to rebind the filtered values, for example ordering the column:

By looking at the grid source code, I have to call the ApplyFilter method. How can I do that on the filter's DropDown Change event?

[korchev]

Did you try setting the page property which the DataGrid is bound to instead? This is what we do in the Dashboard demo. https://github.com/radzenhq/radzen-blazor/blob/master/RadzenBlazorDemos/Pages/DashboardPage.razor#L252

[kim]

@korchev

Did you try setting the page property which the DataGrid is bound to instead?

Yes, I did. Here's the setup (ignore the design errors):

[korchev]

I mean to set it in the Change event of the DropDown. Check the demo that I linked.