DataGrid 绑定中的列表框

Question

我在 XAML 中绑定时遇到问题。我有一个数据网格，里面有一个按钮列表框。我需要将按钮的命令参数绑定到数据网格的项目 ID。我尝试使用RelativeSource，用Id命名隐藏列并尝试绑定列数据上下文，但没有任何效果。我还尝试绑定到 DataGrid 中的 SelectedItem，命令工作正常，但 CanExecute 不会，因为每个按钮都是根据所选行而不是实际所在的行更新的。 这是我的代码：

视图：

<DataGrid
ItemsSource="{Binding Orders}"
AutoGenerateColumns="False">
<DataGrid.Columns>
<DataGridTextColumn  Header="Order date" Binding="{Binding OrderDate}" />
<materialDesign:MaterialDataGridTextColumn Header="Status" Binding="{Binding Status}"/>
<materialDesign:MaterialDataGridTextColumn Header="Last update" Binding="{Binding LastUpdate}"/>
<materialDesign:MaterialDataGridTextColumn Header="Managed by" Binding="{Binding SomePerson}"/>
<materialDesign:MaterialDataGridTextColumn Header="Number" Binding="{Binding SomeNumber}"/>
<DataGridTemplateColumn>
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<Button Content="{Binding ShowDetailsCommandViewModel.Name}" Command="{Binding ShowDetailsCommandViewModel.Command}"/>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
<DataGridTemplateColumn Header="Actions">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<ListBox ItemsSource="{Binding Actions}">
<ListBox.ItemTemplate>
<DataTemplate>
<Button Content="{Binding Name}" Command="{Binding Command}"
CommandParameter="THIS SHOULD BE BINDED TO ORDERVIEWMODEL.ID"/>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
</DataGrid.Columns>
</DataGrid>

视图模型：

public class MyOrdersViewModel
{     
public MyOrdersViewModel()
{
}    
public IList<OrderViewModel> Orders { get; set; }
}
public class OrderViewModel 
{
public OrderViewModel()
{
}
public int Id { get; private set; }
public DateTime OrderDate { get; private set; }
public string Status { get; private set; }
public DateTime LastUpdate { get; private set; }
public string SomePerson { get; private set; }
public int SomeNumber { get; private set; }
public CommandViewModel ShowDetailsCommandViewModel { get; set; }
private bool showItems;
public bool ShowItems
{
get { return showItems; }
set
{
showItems = value;
RaisePropertyChanged();
}
}   
public IList<CommandViewModel> Actions { get; private set; } 
}
}
public class CommandViewModel
{
public CommandViewModel(string name, ICommand command)
{
Name = name;
Command = command;
}
public string Name { get; set; }
public ICommand Command { get; set; }
}

我需要将 OrderViewModel.Id 绑定到 OrderViewModel.Actions.Command 参数。 我该怎么做？

Answer 1

使用 RelativeSource 查找父 DataGridRow 并从其 DataContext (OrderViewModel( 绑定 Id：

CommandParameter="{Binding Path=DataContext.Id, 
RelativeSource={RelativeSource AncestorType=DataGridRow}"/>