如何在wpf datagrid中绑定一个组合框？

Question

如何在wpf datagrid中绑定组合框(Itemssource和选定项)？我正在使用MVVM模式.我试过了

<DataGridTemplateColumn Header="Example 9">
                        <DataGridTemplateColumn.CellTemplate>
                            <DataTemplate>
                                <ComboBox ItemsSource="{Binding PartIds, RelativeSource={RelativeSource AncestorType=Window}}" SelectedItem="{Binding PartId, UpdateSourceTrigger=PropertyChanged}" />
                            </DataTemplate>
                        </DataGridTemplateColumn.CellTemplate>
                    </DataGridTemplateColumn>

和

   <DataGrid AutoGenerateColumns="False" ItemsSource="{Binding MyCars}" HorizontalAlignment="Left">
                <DataGrid.Columns>
                    <DataGridTextColumn Header="Model" Binding="{Binding Model}"/>
                    <DataGridTextColumn Header="Registration" Binding="{Binding Registration}"/>

                    <DataGridTemplateColumn Header="Example 12">
                        <DataGridTemplateColumn.CellTemplate>
                            <DataTemplate>
                                <ComboBox ItemsSource="{Binding CarParts, RelativeSource={RelativeSource AncestorType=Window}}" DisplayMemberPath="PartName" SelectedValuePath="PartID"  SelectedValue="{Binding PartId, UpdateSourceTrigger=PropertyChanged}" />
                            </DataTemplate>
                        </DataGridTemplateColumn.CellTemplate>
                    </DataGridTemplateColumn>

                    <DataGridTextColumn Header="Selected" Binding="{Binding PartId}"/>

                </DataGrid.Columns>
            </DataGrid>

用于数据绑定的属性

#region DataGrid List<String> Example

        public ObservableCollection<MyCar> MyCars { get; set; }
        public List<string> PartIds { get; set; } 

        #endregion

        #region DataGrid List<Class> Example

        public List<CarPart> CarParts { get; set; }

        #endregion

参考:http: //code.msdn.microsoft.com/windowsdesktop/Best-ComboBox-Tutorial-5cc27f82

Answer 1

我尝试了很多选项,但我找到的最简单的选项是生成该组合框的加载事件并将其与列表或数据表绑定.

例如在Xaml

 <DataGridTemplateColumn.CellEditingTemplate>
       <DataTemplate>
                  <ComboBox x:Name="cmbPayee" Loaded="cmbPayee_Loaded" Text="{Binding PayeeName, NotifyOnSourceUpdated=True,Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" SelectedValue ="{Binding PayeeID, NotifyOnSourceUpdated=True,Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"  DisplayMemberPath = "Payee1" SelectedValuePath="PayeeID"/>
      </DataTemplate>

在.cs代码中

private void cmbPayee_Loaded(object sender, RoutedEventArgs e)
    {
        ComboBox cmb = (ComboBox)sender;
            var res = from k in db.Payees
                      select k;
            cmb.ItemsSource = res.ToList();
            cmb.DisplayMemberPath = "Payee1";
            cmb.SelectedValuePath = "PayeeID";

    }