Question

我在WPF中有一个绑定到可观察集合的DataGrid。因为我需要监控哪些特定记录是“脏”的。我已将我的数据类指定为INotifiable，并设置了'IsDirty＆＃39;属性作为每个字段的setter的一部分。

我的DataGrid有两个列，一个文本列和一个组合框列。当文本列发生更改时，会调用相应属性的setter - 但是当组合框更改时，不调用该属性的setter - 任何我出错的想法？

编辑：我指出数据最初正确加载，并且我能够更新UI中的组合框。此外，每当对网格进行任何更改时，它都会获得红色边框，就像绑定失败一样。但是，当我更改名称列并且工作正常时，它也会得到这个，所以不确定是否链接

编辑：我还尝试添加一个选择更改事件，以查看是否会触发它。然而，设置者固执地不会被调用，因此我的基础数据不会被更新

查看模型：

public class ContractConfigViewModel : INotifyPropertyChanged
{

    public class ClientSurveyor: INotifyPropertyChanged
    {
        public ClientSurveyor()
        {
            IsDirty = false;
        }

        public bool IsDirty;

        private ZoomLineManager LineManager;
        public ZoomLineManager linemanager
        {
            get
            {
                return LineManager;
            }
            set
            {
                LineManager = value;
                IsDirty = true;
                OnPropertyChanged("linemanager");
            }
        }

        private string Name;
        public string name
        {
            get
            {
                return Name;
            }
            set
            {
                Name = value;
                IsDirty = true;
                OnPropertyChanged("name");
            }
        }

        public event PropertyChangedEventHandler PropertyChanged;
        protected void OnPropertyChanged(string PropertyName)
        {
            if (this.PropertyChanged != null)
            {
                this.PropertyChanged(this, new PropertyChangedEventArgs(PropertyName));
            }
        }
    }

    private ObservableCollection<ClientSurveyor> allClientReps;
    public ObservableCollection<ClientSurveyor> allclientreps
    {
        get
        {
            return allClientReps;
        }
        set
        {
            allClientReps = value;
            OnPropertyChanged("allclientreps");
        }
    }

    private ObservableCollection<ZoomLineManager> allLineManagers;
    public ObservableCollection<ZoomLineManager> alllinemanagers
    {
        get
        {
            return allLineManagers;
        }
        set
        {
            allLineManagers = value;
            OnPropertyChanged("alllinemanagers");
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    protected void OnPropertyChanged(string PropertyName)
    {
        if (this.PropertyChanged != null)
        {
            this.PropertyChanged(this, new PropertyChangedEventArgs(PropertyName));
        }
    }
}

WPF：

<DataGrid Margin="5" Grid.ColumnSpan="4" ItemsSource="{Binding Path=allclientreps}" SelectedItem="{Binding Path=selectedclientrep}" AutoGenerateColumns="False">
<DataGrid.Columns>
    <DataGridTextColumn Header="Representative Name" Width="*" Binding="{Binding Path=name, NotifyOnTargetUpdated=True}"/>

    <DataGridComboBoxColumn Header="Line Manager" Width="*" 
                            SelectedValueBinding="{Binding linemanager.ID, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
                            SelectedValuePath="ID" 
                            DisplayMemberPath="Name"
                            >
        <DataGridComboBoxColumn.ElementStyle>
            <Style TargetType="ComboBox">
                <Setter Property="ItemsSource" Value="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type DataGrid}}, Path=DataContext.alllinemanagers}"/>
            </Style>
        </DataGridComboBoxColumn.ElementStyle>
        <DataGridComboBoxColumn.EditingElementStyle>
            <Style TargetType="ComboBox">
                <Setter Property="ItemsSource" Value="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type DataGrid}}, Path=DataContext.alllinemanagers}"/>     
            </Style>
        </DataGridComboBoxColumn.EditingElementStyle>
    </DataGridComboBoxColumn>

</DataGrid.Columns>

Answer 1

您需要在ViewModel上为selectedclientrep创建一个属性。

private ClientSurveyor selectedclientrep;
public ClientSurveyor SelectedClientRep
{
    get { return selectedclientrep; }
    set
    {
        selectedclientrep = value;
        OnPropertyChanged("SelectedClientRep");
    }
}

您还需要将View上的SelectedItem绑定到新属性SelectedClientRep。

<DataGrid Margin="5" Grid.ColumnSpan="4" ItemsSource="{Binding Path=allclientreps}" SelectedItem="{Binding Path=SelectedClientRep}" AutoGenerateColumns="False">

我希望这会有所帮助。

wpf datagridcombobox没有更新源

1 个答案: