Cascading DropDownList in Grid Editing (Inline) - article needs to be adjusted

[Aleksandr]

Cascading DropDownList in Grid Editing

it will work when you need to select the value in parent drop down, but for example on edit, the value is already selected & the event will not be fired to get filtered data to child dropdown , my sugestion to combine the solution with data being preoladed for the editing item on Grid=> OnEdit event

private async Task GridRowEdit(GridCommandEventArgs args)
    {
        Console.WriteLine("GridRowEdit");
        if (args.Item is ProductSubmissionModel model)
        {
            await ViewModel.LoadLabs(model.Jurisdiction?.Key);
        }
    }

 

[Aleksandr]

and super hack to prevend double firing of onchange (onblur) (OnChange fires twice)

private int? _jurisdictionSelectedVal = 0; //prevent onblur from parent drop down

    private async Task GridRowEdit(GridCommandEventArgs args)
    {
        Console.WriteLine("GridRowEdit");
        if (args.Item is ProductSubmissionModel model)
        {
            _jurisdictionSelectedVal = model.Jurisdiction?.Key;
            await ViewModel.LoadLabs(model.Jurisdiction?.Key);
        }
    }

    private async Task JurisdictionChanged(object obj)
    {
        Console.WriteLine("JurisdictionChanged");

        if (_jurisdictionSelectedVal != (int?)obj)
        {
            _jurisdictionSelectedVal = (int?)obj;
            await ViewModel.LoadLabs((int?)obj);
        }
    }