MVVM Filtered + Filtering Event

[Minh]

Hi, when using the GridViewSelectColumn filters, it deselects the selecteditems. So I use this bit of code to fix it 

 

private void LoanGrid_OnFiltered(object sender, GridViewFilteredEventArgs e)

{

    LoanGrid.SelectedItems.AddRange(SelectedLoans);

}

         

public BindableCollection<LoanDTO> SelectedLoans { get; set; }

         

private void LoanGrid_OnFiltering(object sender, GridViewFilteringEventArgs e)

{

    SelectedLoans = new BindableCollection<LoanDTO>();

    foreach (var selectedItem in LoanGrid.SelectedItems)

    {

        SelectedLoans.Add((LoanDTO)selectedItem);

    }

}

That works perfectly fine, but I'm trying to have it be in MVVM format using caliburn.

on xaml side,     cal:Message.Attach="[Filtered] = [Filtered];[Filtering] = [Filtering] "

ViewModel

 

private BindableCollection<LoanDTO> _oldLoans = new BindableCollection<LoanDTO>();

public void Filtered()
{
    SelectedLoans = new BindableCollection<LoanDTO>(Items.Where(x => _oldLoans.Any(y => y.Id == x.Id)));
}

public void Filtering()
{
    _oldLoans = new BindableCollection<LoanDTO>();
    foreach (var selectedItem in SelectedLoans)
    {
        _oldLoans.Add(selectedItem);
    }
}

 

The selecteditems get cleared using the MVVM methods. Any thoughts?



[Stefan]

Hi Minh,

In order to handle a given event using the MVVM pattern, you can benefit from the EventToCommandBehavior mechanism. Can you please check it out and let me know how it goes?

Regards,
Stefan X1
Telerik