<DataGridTemplateColumn> <DataGridTemplateColumn.CellTemplate> <DataTemplate> <CheckBox HorizontalAlignment="Center" VerticalAlignment="Center" IsChecked="{Binding IsCheck,UpdateSourceTrigger=PropertyChanged}" x:Name="DTCB" Command="{Binding DataContext.SelectedCommand, RelativeSource={RelativeSource AncestorType=UserControl}}" CommandParameter="{Binding Cad_No}"> <CheckBox.InputBindings> <MouseBinding MouseAction="LeftClick" /> </CheckBox.InputBindings> </CheckBox> </DataTemplate> </DataGridTemplateColumn.CellTemplate> </DataGridTemplateColumn>怎么让第一行的checkbox不显示

你可以在第一行的数据模型中将 `IsCheck` 属性设置为 `false`，这样第一行的 `CheckBox` 就不会被选中并且不会显示了。或者，你可以使用 `RowStyle` 设置第一行的样式，将 `CheckBox` 隐藏：

<DataGrid.RowStyle>
    <Style TargetType="DataGridRow">
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="DataGridRow">
                    <Border x:Name="DGR_Border"
                            BorderBrush="{TemplateBinding BorderBrush}"
                            BorderThickness="{TemplateBinding BorderThickness}"
                            Background="{TemplateBinding Background}"
                            SnapsToDevicePixels="True">
                        <SelectiveScrollingGrid>
                            <SelectiveScrollingGrid.ColumnDefinitions>
                                <ColumnDefinition Width="Auto"/>
                                <ColumnDefinition Width="*"/>
                            </SelectiveScrollingGrid.ColumnDefinitions>
                            <SelectiveScrollingGrid.RowDefinitions>
                                <RowDefinition Height="*"/>
                                <RowDefinition Height="Auto"/>
                            </SelectiveScrollingGrid.RowDefinitions>

                            <!-- Hide CheckBox in the first row -->
                            <CheckBox x:Name="DTCB"
                                      IsChecked="{Binding IsCheck, UpdateSourceTrigger=PropertyChanged}"
                                      Command="{Binding DataContext.SelectedCommand, RelativeSource={RelativeSource AncestorType=UserControl}}"
                                      CommandParameter="{Binding Cad_No}"
                                      HorizontalAlignment="Center"
                                      VerticalAlignment="Center"
                                      Visibility="{Binding RelativeSource={RelativeSource AncestorType=DataGrid}, Converter={StaticResource FirstRowToVisibilityConverter}, ConverterParameter={Binding}}"/>

                            <DataGridCellsPresenter Grid.Column="1"
                                                    ItemsPanel="{TemplateBinding ItemsControl.ItemsPanel}"
                                                    SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                        </SelectiveScrollingGrid>
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</DataGrid.RowStyle>

你还需要实现一个 `FirstRowToVisibilityConverter` 转换器来将第一行的可见性设置为 `Collapsed`，其他行的可见性设置为 `Visible`：

public class FirstRowToVisibilityConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        if (value is CollectionView collectionView && collectionView.Count > 0)
        {
            var firstItem = collectionView.GetItemAt(0);
            return firstItem == parameter ? Visibility.Collapsed : Visibility.Visible;
        }

        return Visibility.Visible;
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}