Troubleshooting Property Update Issues in WPF DataGridCheckBoxColumn Bindings

Tue, 03 Sep 2024 10:46:36 +0000

Why does the CheckBox state change in WPF DataGridCheckBoxColumn not automatically update the bound property?

Situation：

My code has correctly implemented the binding relationship using the MVVM library, but I am unable to filter data using the checkbox in the DataGrid.

//model
public class SpectralPeakDataItem
{
 public bool IsUserFor { get; set; }

 public double Wavelength { get; set; }

 public int PixelPosition { get; set; }

 public double InstensityPercentage { get; set; }
}

//ViewModel
[ObservableProperty]
private ObservableCollection<SpectralPeakDataItem> _mercuryArgonSpectralPeakDataItems = [];

<ui:DataGrid
 Grid.Column="0"
 Margin="5"
 AutoGenerateColumns="False"
 ItemsSource="{Binding MercuryArgonSpectralPeakDataItems, Mode=TwoWay}">
 <DataGrid.Columns>
 <DataGridCheckBoxColumn Binding="{Binding IsUserFor, Mode=TwoWay}" Header="IsUserFor" />
 <DataGridTextColumn Binding="{Binding Wavelength, Mode=TwoWay}" Header="Wavelength" />
 <DataGridTextColumn Binding="{Binding PixelPosition, Mode=TwoWay}" Header="PixelPosition" />
 <DataGridTextColumn Binding="{Binding InstensityPercentage, Mode=TwoWay}" Header="Percentage" />
 </DataGrid.Columns>
</ui:DataGrid>

However, in the usual event-driven code design, it works fine.So, I think this is an issue with MVVM’s data binding, as it doesn’t seem to achieve data synchronization.So next, I discovered that:In a WPF DataGridCheckBoxColumn, the reason why changes in the CheckBox’s checked state do not automatically trigger property updates is primarily because the DataGridCheckBoxColumn uses a binding context that may not directly reflect changes in the CheckBox state. This often involves the following issues:

MVVM on Martin‘s Physics Club

Troubleshooting Property Update Issues in WPF DataGridCheckBoxColumn Bindings

Situation：