C# 如何将property的属性绑定到DataGridColumn？

我正在使用实体框架创建我的系统，我将对象属性绑定到一个

数据网格

，每个字段都显示数据，但只是一个属性

Fornecedor

，是另一个类，不能在第一次显示，它只会在我打开新的注册窗口并关闭时显示，我不知道它为什么会这样做，因为我对构造函数中的show list和NewRegister.Closed使用了相同的方法，所以暂停我的类

public class Produto
{
    public int Id { get; set; }
    public string Codigo { get; set; }
    public string Linha { get; set; }
    public int Comprimento { get; set; }
    public int Largura { get; set; }
    public string Cor { get; set; }
    public string CorPe { get; set; }
    public int Gaveta { get; set; }
    public Fornecedor Fornecedor { get; set; }   // <- Fornecedor is other class
    public byte[] Foto { get; set; }
    public int Estoque { get; set; }
    public float ValorCompra { get; set; }
    public float ValorVenda { get; set; }
}

因此，我为我的窗口设置了

DataContext

，并为

DataGridTextColumns

public PageMesa()
{
    InitializeComponent();
    ShowList();
}

private void ShowList()
{
    listMesa.ItemsSource = db.Mesas.ToList();
}

private void NewCommand_Executed(object sender, ExecutedRoutedEventArgs e)
{
    MesaEditar NewRegister = new MesaEditar();
    NewRegister.Closed += (s, arg) => { ShowList(); };
    NewRegister.ShowDialog();
}

我的数据网格

<DataGrid Name="listMesa" Grid.Row="1" Margin="10,0" AutoGenerateColumns="False" IsReadOnly="True">
    <DataGrid.Columns>
        <DataGridTextColumn Header="ID" Binding="{Binding Id}" Width="1*" />
        <DataGridTextColumn Header="Codigo" Binding="{Binding Codigo}" Width="2*" />
        <DataGridTextColumn Header="Linha" Binding="{Binding Linha}" Width="2*" />
        <DataGridTextColumn Header="Comprimento" Binding="{Binding Comprimento}" Width="3*" />
        <DataGridTextColumn Header="Largura" Binding="{Binding Largura}" Width="3*" />
        <DataGridTextColumn Header="Cor" Width="2*">
            <DataGridTextColumn.CellStyle>
                <Style TargetType="DataGridCell">
                    <Setter Property="Background" Value="{Binding Cor}" />
                </Style>
            </DataGridTextColumn.CellStyle>
        </DataGridTextColumn>
        <DataGridTextColumn Header="Cor do pé" Binding="{Binding CorPe}" Width="4*" />
        <DataGridTextColumn Header="Gaveta" Binding="{Binding Gaveta}" Width="2*" />
        <DataGridTextColumn Header="Fornecedor" Binding="{Binding Fornecedor.Nome}" Width="4*" />
        <DataGridTextColumn Header="Estoque" Binding="{Binding Estoque}" Width="2*" />
        <DataGridTextColumn Header="Valor da compra" Binding="{Binding ValorCompra, StringFormat=R$0.00}" Width="4*" />
        <DataGridTextColumn Header="Valor da venda" Binding="{Binding ValorVenda, StringFormat=R$0.00}" Width="4*" />
    </DataGrid.Columns>
</DataGrid>

为什么会发生这种情况？

---

对不起，我的表达不好，我不知道如何表达这个问题，请问我每个问题

不可能理解问题是什么，为什么不提供datagrid以及Forcender和Produto上面的类的使用位置示例。如果您想要属性的属性，则必须提供完全限定名称：

Key=“Fornecedor.Nome”

。只需对所有要显示的属性重复此操作。你能显示你的XAML吗？你确定

Fornecedor

不为空吗？对不起，我忘记发布我的数据网格了

<DataGrid Name="listMesa" Grid.Row="1" Margin="10,0" AutoGenerateColumns="False" IsReadOnly="True">
    <DataGrid.Columns>
        <DataGridTextColumn Header="ID" Binding="{Binding Id}" Width="1*" />
        <DataGridTextColumn Header="Codigo" Binding="{Binding Codigo}" Width="2*" />
        <DataGridTextColumn Header="Linha" Binding="{Binding Linha}" Width="2*" />
        <DataGridTextColumn Header="Comprimento" Binding="{Binding Comprimento}" Width="3*" />
        <DataGridTextColumn Header="Largura" Binding="{Binding Largura}" Width="3*" />
        <DataGridTextColumn Header="Cor" Width="2*">
            <DataGridTextColumn.CellStyle>
                <Style TargetType="DataGridCell">
                    <Setter Property="Background" Value="{Binding Cor}" />
                </Style>
            </DataGridTextColumn.CellStyle>
        </DataGridTextColumn>
        <DataGridTextColumn Header="Cor do pé" Binding="{Binding CorPe}" Width="4*" />
        <DataGridTextColumn Header="Gaveta" Binding="{Binding Gaveta}" Width="2*" />
        <DataGridTextColumn Header="Fornecedor" Binding="{Binding Fornecedor.Nome}" Width="4*" />
        <DataGridTextColumn Header="Estoque" Binding="{Binding Estoque}" Width="2*" />
        <DataGridTextColumn Header="Valor da compra" Binding="{Binding ValorCompra, StringFormat=R$0.00}" Width="4*" />
        <DataGridTextColumn Header="Valor da venda" Binding="{Binding ValorVenda, StringFormat=R$0.00}" Width="4*" />
    </DataGrid.Columns>
</DataGrid>