How to add ComboBox column in XCeed DataGridControl (WPF)

问题

I am trying to add a combobox column in XCeeds DataGridControl. Managed to make a CellEditor, which sets proper values to the binded field, but there are problems with the CellContent template.

Xaml:

<Grid>
    <Grid.RowDefinitions>
        <RowDefinition></RowDefinition>
    </Grid.RowDefinitions>
    <Grid.ColumnDefinitions>
        <ColumnDefinition></ColumnDefinition>
    </Grid.ColumnDefinitions>

    <xcdg:DataGridControl ItemsSource="{Binding Address}" >
        <xcdg:DataGridControl.Columns>
            <xcdg:Column x:Name="clmAdd" FieldName="HouseNumberAdd"/>
            <xcdg:Column x:Name="clmCity" FieldName="City"/>
            <xcdg:Column x:Name="clmCountry" FieldName="CountryID">
                <xcdg:Column.CellEditor>
                    <xcdg:CellEditor>
                        <xcdg:CellEditor.EditTemplate>
                            <DataTemplate>
                                <ComboBox SelectedValuePath="CountryID"
                                          DisplayMemberPath="Name"
                                          ItemsSource="{Binding Path=DataContext.Country, RelativeSource={RelativeSource AncestorType={x:Type Window}}}"
                                          SelectedValue="{xcdg:CellEditorBinding}" IsEditable="True" Foreground="Black" IsSynchronizedWithCurrentItem="True" />
                            </DataTemplate>
                        </xcdg:CellEditor.EditTemplate>
                    </xcdg:CellEditor>
                </xcdg:Column.CellEditor>
            </xcdg:Column>
        </xcdg:DataGridControl.Columns>
    </xcdg:DataGridControl>
</Grid>

Code:

public partial class MainWindow : Window
{
    ViewMode viewMode;
    public MainWindow()
    {
        InitializeComponent();

        viewMode = new ViewMode();
        this.DataContext = viewMode;
    }

    private void Window_MouseDoubleClick(object sender, MouseButtonEventArgs e)
    {
        DataTable source = viewMode.Address;
    }
}

public class ViewMode
{
    public DataTable Address { get; set; }
    public DataTable Country { get; set; }

    public ViewMode()
    {
        Address = new DataTable();
        Address.Columns.Add("HouseNumberAdd", typeof(string));
        Address.Columns.Add("City", typeof(string));
        Address.Columns.Add("CountryID", typeof(int));

        Address.Rows.Add("Ivlivensko 10-KV 1234", "Krakov", 1);
        Address.Rows.Add("Astrakhanski 10-KV 1234", "Kharkiv", 2);
        Address.Rows.Add("Tverskii 10-KV 1234", "Moskva", 3);
        Address.Rows.Add("Klement 10-KV 1234", "Warsav", 1);

        Country = new DataTable();
        Country.Columns.Add("Name", typeof(string));
        Country.Columns.Add("CountryID", typeof(int));

        Country.Rows.Add("Poland", 1);
        Country.Rows.Add("Ukrain", 2);
        Country.Rows.Add("Russland", 3);
    }
}

EDITED::

I've replaced CellEditor by ContentTemplate, but when I am trying to edit the data inside Grid, the source table remains the same. How I can fix this?

 <Grid>
    <Grid.RowDefinitions>
        <RowDefinition></RowDefinition>
    </Grid.RowDefinitions>
    <Grid.ColumnDefinitions>
        <ColumnDefinition></ColumnDefinition>
    </Grid.ColumnDefinitions>

    <xcdg:DataGridControl ItemsSource="{Binding Address}" >
        <xcdg:DataGridControl.Columns>
            <xcdg:Column x:Name="clmAdd" FieldName="HouseNumberAdd"/>
            <xcdg:Column x:Name="clmCity" FieldName="City"/>
            <xcdg:Column x:Name="clmCountry" FieldName="CountryID">
                <xcdg:Column.CellContentTemplate>
                    <DataTemplate x:Name="clmCountryTmp">
                        <ComboBox SelectedValuePath="CountryID"
                                DisplayMemberPath="Name"
                                ItemsSource="{Binding Path=DataContext.Country, RelativeSource={RelativeSource AncestorType={x:Type Window}}}"
                                SelectedValue="{xcdg:CellEditorBinding}"/>
                    </DataTemplate>
                </xcdg:Column.CellContentTemplate>
            </xcdg:Column>
        </xcdg:DataGridControl.Columns>
    </xcdg:DataGridControl>
</Grid>

回答1:

Try removing IsSynchronizedWithCurrentItem="True"

In my tests, having this prevented the text value from appearing in the combobox when going in edit mode. As soon as I removed it, the text displayed as expected.

If you want to change the look of the cell when not in edit mode, you can assign a custom CellContentTemplate to the column.

回答2:

In addition, if you want the cell to show the DisplayValue of the ComboBox in text form, add the following to your column.

<xcdg:Column.CellContentTemplate>
    <DataTemplate>
        <TextBlock Text="{xcdg:CellEditorBinding Converter={StaticResource YourConverter}}" />
    </DataTemplate>
</xcdg:Column.CellContentTemplate>

where "YourConverter" converts the SelectedValuePath value into the DisplayMemberPath value of the ComboBox.

来源：https://stackoverflow.com/questions/37321816/how-to-add-combobox-column-in-xceed-datagridcontrol-wpf