这是我最终将其与 MVVM 模式一起使用的方法:
我有两组数据用于绑定我的视图模型:一组用于实际网格数据,一组用于列标题。目前,这些被公开为两个属性:
// INotifyPropertyChanged support not shown for brevity
public DataTable GridData { get; set; }
public BindingList<ImportColumnInfo> ColumnData { get; set; }
处理两组不同数据的诀窍在于网格。我对 DataGrid 进行了子类化,并为网格提供了一个名为 ColumnSource 的附加数据源,作为依赖属性。这是绑定到我的视图模型上的 ColumnData 的内容。然后,我将每个自动生成的列的标题设置为 ColumnSource 数据源中适当索引的数据。代码如下:
public class ImporterDataGrid : DataGrid
{
protected override void OnAutoGeneratingColumn(DataGridAutoGeneratingColumnEventArgs e)
{
base.OnAutoGeneratingColumn(e);
int columnIndex = this.Columns.Count;
var column = new ImporterDataGridColumn();
column.Header = ColumnSource[columnIndex];
column.Binding = new Binding(e.PropertyName) { Mode = BindingMode.OneWay };
e.Column = column;
}
public IList ColumnSource
{
get { return (IList)GetValue(ColumnSourceProperty); }
set { SetValue(ColumnSourceProperty, value); }
}
public static readonly DependencyProperty ColumnSourceProperty = DependencyProperty.Register("ColumnSource", typeof(IList), typeof(ImporterDataGrid), new FrameworkPropertyMetadata(null));
}
我现在可以在我的列的模板化标题中执行正常的数据绑定,这将全部绑定到我的视图模型的 ColumnData 属性中的数据。
更新:我被要求为我的网格显示 XAML。这真的很基本,但这里是:
<Controls:ImporterDataGrid
AutoGenerateColumns="True" x:Name="previewDataGrid"
VerticalScrollBarVisibility="Visible"
HorizontalScrollBarVisibility="Visible"
IsReadOnly="True"
SelectionMode="Extended"
HeadersVisibility="Column"
ItemsSource="{Binding PreviewData}"
ColumnSource="{Binding PreviewColumnData}"
Style="{StaticResource ImporterDataGridStyle}"
Background="White" CanUserReorderColumns="False" CanUserResizeRows="False"
CanUserSortColumns="False" AlternatingRowBackground="#FFFAFAFA" AllowDrop="True" />
这是 ImporterColumnHeaderStyle:
<Style x:Key="ImporterDataGridColumnHeaderStyle" TargetType="{x:Type toolkit:DataGridColumnHeader}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type toolkit:DataGridColumnHeader}">
<Grid>
<toolkit:DataGridHeaderBorder Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Padding="{TemplateBinding Padding}" IsClickable="{TemplateBinding CanUserSort}" IsHovered="False" IsPressed="False" SortDirection="{TemplateBinding SortDirection}">
<Grid>
<CheckBox Height="16" Margin="6,6,16,0" Name="importCheckBox" IsChecked="{Binding Path=Import}" VerticalAlignment="Top">Import Column</CheckBox>
<StackPanel IsEnabled="{Binding Path=Import}">
<ComboBox Height="24" Margin="6,29,6,0" Name="columnTypeComboBox" VerticalAlignment="Top" SelectedValue="{Binding ColumnType}" ItemsSource="{Binding Source={local:EnumList {x:Type Models:ImportColumnType}}}">
</ComboBox>
<TextBox Height="23" Margin="6,6,6,33" Name="customHeadingTextBox" VerticalAlignment="Bottom" Text="{Binding Path=CustomColumnName}" IsEnabled="{Binding ColumnType, Converter={StaticResource ColumnTypeToBooleanConverter}}" />
</StackPanel>
<TextBlock Height="20" Margin="6,0,6,7" Name="originalHeadingTextBlock" Text="{Binding Path=OriginalColumnName}" VerticalAlignment="Bottom" Foreground="Gray" />
</Grid>
</toolkit:DataGridHeaderBorder>
<Thumb x:Name="PART_LeftHeaderGripper" HorizontalAlignment="Left">
<Thumb.Style>
<Style TargetType="{x:Type Thumb}">
<Setter Property="Width" Value="8"/>
<Setter Property="Background" Value="Transparent"/>
<Setter Property="Cursor" Value="SizeWE"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Thumb}">
<Border Background="{TemplateBinding Background}" Padding="{TemplateBinding Padding}"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Thumb.Style>
</Thumb>
<Thumb x:Name="PART_RightHeaderGripper" HorizontalAlignment="Right">
<Thumb.Style>
<Style TargetType="{x:Type Thumb}">
<Setter Property="Width" Value="8"/>
<Setter Property="Background" Value="Transparent"/>
<Setter Property="Cursor" Value="SizeWE"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Thumb}">
<Border Background="{TemplateBinding Background}" Padding="{TemplateBinding Padding}"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Thumb.Style>
</Thumb>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>