帮我解决绑定问题。该项目首先在WPF + WAF + ef代码中。我想将DataGridComboBoxColumn值绑定到模型属性,但某些工作不正常。 型号:使用MVVM(WAF)绑定WPF DataGridComboBoxColumn
public class DocumentMove
{
[Key]
public Guid DocumentMoveId { get; set; }
public Guid RawMaterialId { get; set; }
public RawMaterial RawMaterial { get; set; }
public decimal Amount { get; set; }
public decimal Price { get; set; }
}
public class RawMaterial
{
[Key]
public Guid RawMaterialId { get; set; }
public RawMaterialGroup Group { get; set; }
[MaxLength(20)]
public string Code { get; set; }
public Colour Colour { get; set; }
[MaxLength(100)]
public string Name { get; set; }
public Measure Measure { get; set; }
public List<ArrLocation> ArrLocations { get; set; }
public List<RawMove> RawMoves { get; set; }
public Delivery Supplier { get; set; }
public RawMaterial()
{
}
}
网格:
<DataGrid x:Name="documentMoveTable" AutoGenerateColumns="False" ItemsSource="{Binding DocumentMoves}"
SelectedItem="{Binding SelectedDocumentMove}" CanUserDeleteRows="False" IsReadOnly="False" RowEditEnding="documentMoveTable_RowEditEnding">
<DataGrid.InputBindings>
<KeyBinding Command="{Binding RemoveCommand}" Key="Del"/>
</DataGrid.InputBindings>
<DataGrid.Columns>
<DataGridComboBoxColumn Header="{x:Static p:Resources.RawMaterial}"
SelectedValueBinding="{Binding RawMaterialId}"
DisplayMemberPath="Name" SelectedValuePath="RawMaterialId">
<DataGridComboBoxColumn.ElementStyle>
<Style TargetType="{x:Type ComboBox}">
<Setter Property="ItemsSource" Value="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Window}}, Path=DataContext.RawMaterials}" />
<Setter Property="IsReadOnly" Value="True"/>
</Style>
</DataGridComboBoxColumn.ElementStyle>
<DataGridComboBoxColumn.EditingElementStyle>
<Style TargetType="{x:Type ComboBox}">
<Setter Property="ItemsSource" Value="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Window}}, Path=DataContext.RawMaterials}" />
</Style>
</DataGridComboBoxColumn.EditingElementStyle>
</DataGridComboBoxColumn>
<DataGridTextColumn Binding="{Binding Amount, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True,
ValidatesOnExceptions=True, NotifyOnValidationError=True}"
Header="{x:Static p:Resources.Amount}" Width="*" ElementStyle="{StaticResource TextCellElementStyle}"/>
<DataGridTextColumn Binding="{Binding Price, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True,
ValidatesOnExceptions=True, NotifyOnValidationError=True}"
Header="{x:Static p:Resources.Price}" Width="*" ElementStyle="{StaticResource TextCellElementStyle}"/>
</DataGrid.Columns>
</DataGrid>
和视图模型:
[Export]
public class EditDocumentViewModel : ViewModel<IEditDocumentView>
{
private IEnumerable<DocumentMove> _documentMoves;
private ICommand _removeCommand;
private ICommand _editListCommand;
public IEnumerable<DocumentMove> DocumentMoves
{
get { return _documentMoves; }
set
{
_documentMoves = value;
RaisePropertyChanged("DocumentMoves");
}
}
public DocumentMove SelectedDocumentMove { get; set; }
...
}
虽然试图添加一个新的行格,我可以从ComboBox和广告中选择一个值d“金额”和“价格”的值。在处理EditListCommand时控制器一方存在_editDocumentViewModel.SelectedDocumentMove.Amount
和_editDocumentViewModel.SelectedDocumentMove.Price
的值,但_editDocumentViewModel.SelectedDocumentMove.RawMaterialId
和_editDocumentViewModel.SelectedDocumentMove.RawMaterial
的值为空。我认为我的ComboBoxColumn绑定中的某些内容是错误的,或者可能是其他内容?
请帮忙,对不起我的英文)。