WPF：UpdateSourceTrigger =具有双值的PropertyChanged问题

Question

我正在WPF项目中，我有一个绑定到ObservableCollection的DataGrid。 值已正确限制，但我遇到的问题是我无法编辑具有双精度值的列。 它不会让我在单元格中插入一个句点。

这就是XAML的功能：

<DataGrid Name="dataGrid" AutoGenerateColumns="False" 
              CanUserResizeColumns="True" CanUserAddRows="False" CanUserSortColumns="True" ItemsSource="{Binding}"
              HorizontalAlignment="Stretch" HorizontalContentAlignment="Stretch" 
              ColumnWidth="*" Margin="0,51,186,58" 
              RowEditEnding="dataGrid_RowEditEnding">
        <DataGrid.Columns>
            <DataGridTextColumn Header="Field 1" Binding="{Binding Field1, UpdateSourceTrigger=PropertyChanged}" />
            <DataGridTextColumn Header="Field 2" Binding="{Binding Field2, UpdateSourceTrigger=PropertyChanged}" />
            <DataGridTextColumn Header="Field 3" Binding="{Binding Field3, UpdateSourceTrigger=PropertyChanged}" />
            <DataGridTextColumn Header="Field 4" Binding="{Binding Field4, UpdateSourceTrigger=PropertyChanged}" />
            <DataGridCheckBoxColumn Header="Field 5" Binding="{Binding Field5, UpdateSourceTrigger=PropertyChanged}" />
            <DataGridTextColumn Header="Field 6" Binding="{Binding Field6, UpdateSourceTrigger=PropertyChanged}" />
        </DataGrid.Columns>

<DataGrid>

这是类（对不起的类属性很抱歉：/我是故意这样做的）

class FieldClass : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler PropertyChanged;

    private int _field1;
    public int Field1
    {
        get { return _field1; }
        set 
        {
            _field1 = value;
            OnPropertyChanged("Field1");
        }
    }

    private int _field2;
    public int Field2
    {
        get { return _field2; }
        set 
        {
            _field2 = value;
            OnPropertyChanged("Field2");
        }
    }

    private double _field3;
    public double Field3
    {
        get { return _field3; }
        set
        {
            _field3 = value;
            OnPropertyChanged("Field3");
        }
    }

    private double _field4;
    public double Field4
    {
        get { return _field4; }
        set 
        {
            _field4 = value;
            OnPropertyChanged("Field4");
        }
    }

    private bool _field5;
    public bool Field5
    {
        get { return _field5; }
        set 
        {
            _field5 = value;
            OnPropertyChanged("Field5");
        }
    }

    private double _field6;
    public double Field6
    {
        get { return _field6; }
        set 
        {
            _field6 = value;
            OnPropertyChanged("Field6");
        }
    }

    public FieldClass()
    {
        _field1 = 0;
        _field2 = 0;
        _field3 = 0.0;
        _field4 = 0.0;
        _field5 = false;
        _field6 = 0.0;
    }

    // Create the OnPropertyChanged method to raise the event 
    protected void OnPropertyChanged(string name)
    {
        PropertyChangedEventHandler handler = PropertyChanged;
        if (handler != null)
        {
            handler(this, new PropertyChangedEventArgs(name));
        }
    }
}

如果要更新列的值（让我说我想更新Field3或具有双精度值的任何字段），如何在DataGrid上做到这一点，我可以插入双精度值，如2.1？

是否需要数据模板？ 还是一个初学者，不知道如何去做。

谢谢您的帮助！

Answer 1

如果您确实想通过PropertyChanged触发器获得行为，则可以尝试使用Binding的IsAsync = true，但是我不确定这是否是正确的解决方案。

<DataGridTextColumn Header="Field 3" Binding="{Binding Field3, UpdateSourceTrigger=PropertyChanged, StringFormat=\{0:n\}, IsAsync=True}" />