c# - ComboBox SelectedItem 绑定(bind)不更新

Question

我有点疑惑:这有效:

<StackPanel Orientation="Horizontal" HorizontalAlignment="Right">
            <Label Content="Rol" />
            <ComboBox ItemTemplate="{StaticResource listRollen}"
                      Height="23" Width="150"
                      SelectedItem="{Binding Path=SelectedRol, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}"
                      ItemsSource="{Binding Path=allRollen, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" />
        </StackPanel>

SelectedRol 的属性是:

public TblRollen SelectedRol
    {
        get { return _selectedRol; }
        set
        {
            if (_selectedRol != value)
            {
                _selectedRol = value;
                OnPropertyChanged("SelectedRol");
            }
        }
    }

但这行不通:

<StackPanel Orientation="Horizontal" HorizontalAlignment="Right">
            <Label Content="Soort" />
            <ComboBox ItemTemplate="{StaticResource listSoorten}"
                      Height="23" Width="150"
                      ItemsSource="{Binding Path=allSoorten}"
                      SelectedItem="{Binding Path=SelectedProduct, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>
        </StackPanel>

具有以下属性的 SelectedProduct:

public TblProduktSoorten SelectedProduct
    {
        get { return _selectedPSoort; }
        set
        {
            if (_selectedPSoort != value)
            {
                _selectedPSoort = value;
                OnPropertyChanged("SelectedProduct");
            }
        }
    }

我在代码中的某处设置了 SelectedProduct = p.TblProduktSoorten，在调试时，我看到属性设置正确...

Answer 1

DataGrid 中的组合框？

如果组合框在 DataGrid 中，您必须添加:

Mode=TwoWay, UpdateSourceTrigger=PropertyChanged

看这个:https://stackoverflow.com/a/5669426/16940