删除行后数据网格不更新

Question

Hi there i am using wpf mvvm and my datagrid not updating scource after removing row can any one help please here is my viewmodel:

public class UserPaymentsVM : ViewModelBase
    {
        private IDataProvider _dataProvider;
        private int _selectedClientID;
        public Clients Client { get; set; }
        private List<Payments> _payments;
        public List<Payments> payments
        {
            get { return _payments; }
            set { _payments = value; RaisePropertyChanged(nameof(payments)); }
        }

and here is my view

    <Grid Background="Azure">
        <DataGrid ItemsSource="{Binding Path=payments, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"

                  AutoGenerateColumns="True" 
                  Height="350" 
                  VerticalAlignment="Top"
                  SelectedValuePath="pid"
                 SelectedValue="{Binding PayID}">
        </DataGrid>
        <Button  Height="50" Width="100" Content="Remove" HorizontalAlignment="Center" VerticalAlignment="Bottom" Command="{Binding RemovePayment}"/>
    </Grid>
</UserControl>

Answer 1

您应该将数据网格绑定到 Observable 集合并实现 INotifyCollectionChanged 接口，以便在动态更改时通知侦听器，例如何时删除项目或刷新整个列表。