WPF4DataGrid：将行号放入行标头

我希望将行号放入WPF4DataGrid的RowHeader中，这样它就有了一个类似Excel的列来表示DataGrid的行号

我在网上看到的解决方案建议在业务对象中添加一个索引字段。这并不是一个真正的选项，因为DataGrid将被大量使用，我们不想一直跟踪这些索引字段的变化

---

非常感谢

一种方法是将它们添加到

数据网格的LoadingRow事件中



void DataGrid\u LoadingRow（对象发送方，DataGridRowEventArgs e）
{
//添加1以使行计数从1开始，而不是从0开始
//正如daub815所指出的
e、 Row.Header=（e.Row.GetIndex（）+1.ToString（）；
}

更新

为了在WPF工具包中使用.NET3.5DataGrid，需要进行一些修改。索引仍然正确生成，但使用虚拟化时输出失败。以下对
RowHeaderTemplate
的修改修复了此问题

<toolkit:DataGrid LoadingRow="DataGrid_LoadingRow">
    <toolkit:DataGrid.RowHeaderTemplate>
        <DataTemplate>
            <TextBlock Text="{Binding RelativeSource={RelativeSource AncestorType={x:Type toolkit:DataGridRow}},
                                      Path=Header}"/>
        </DataTemplate>
    </toolkit:DataGrid.RowHeaderTemplate>
</toolkit:DataGrid>

显示行数

公共类DataGridBehavior
{
#区域显示行数
公共静态从属属性DisplayRowNumberProperty=
DependencyProperty.RegisterAttached（“DisplayRowNumber”，
类型（bool），
类型（DataGridBehavior），
新的FrameworkPropertyMetadata（false，OnDisplayRowNumberChanged））；
公共静态bool GetDisplayRowNumber（DependencyObject目标）
{
返回（bool）target.GetValue（DisplayRowNumberProperty）；
}
公共静态void SetDisplayRowNumber（DependencyObject目标，布尔值）
{
target.SetValue（DisplayRowNumberProperty，value）；
}
私有静态无效OnDisplayRowNumberChanged（DependencyObject目标，DependencyPropertyChangedEventArgs e）
{
DataGrid DataGrid=目标为DataGrid；
if（（bool）e.NewValue==true）
{
EventHandler loadedRowHandler=null；
loadedRowHandler=（对象发送方，DataGridRowEventArgs ea）=>
{
if（GetDisplayRowNumber（dataGrid）==false）
{
dataGrid.LoadingRow-=loadedRowHandler；
返回；
}
ea.Row.Header=ea.Row.GetIndex（）；
};
dataGrid.LoadingRow+=loadedRowHandler；
ItemsChangedEventHandler itemsChangedHandler=null；
itemsChangedHandler=（对象发送者，ItemsChangedEventArgs ea）=>
{
if（GetDisplayRowNumber（dataGrid）==false）
{
dataGrid.ItemContainerGenerator.ItemsChanged-=itemsChangedHandler；
返回；
}
GetVisualChildCollection（数据网格）。
ForEach（d=>d.Header=d.GetIndex（））；
};
dataGrid.ItemContainerGenerator.ItemsChanged+=itemsChangedHandler；
}
}
#endregion//DisplayRowNumber
#区域获得视觉效果
私有静态列表GetVisualChildCollection（对象父对象），其中T:Visual
{
List visualCollection=新列表（）；
GetVisualChildCollection（父对象作为DependencyObject，visualCollection）；
返回视觉采集；
}
私有静态void GetVisualChildCollection（DependencyObject父对象，列出visualCollection），其中T:Visual
{
int count=VisualTreeHelper.GetChildrenCount（父级）；
for（int i=0；i
编辑：显然，滚动会更改索引，因此绑定不会像那样工作…

（看似）干净的模板解决方案：

Xaml：

如果添加或删除行，所有这些方法都将不起作用。在这种情况下，应该刷新行索引。看看这种行为：

public static class DataGridBehavior
{
    #region RowNumbers property

    public static readonly DependencyProperty RowNumbersProperty =
        DependencyProperty.RegisterAttached("RowNumbers", typeof (bool), typeof (DataGridBehavior), 
        new FrameworkPropertyMetadata(false, OnRowNumbersChanged));

    private static void OnRowNumbersChanged(DependencyObject source, DependencyPropertyChangedEventArgs args)
    {
        DataGrid grid = source as DataGrid;
        if (grid == null)
            return;
        if ((bool)args.NewValue)
        {
            grid.LoadingRow += onGridLoadingRow;
            grid.UnloadingRow += onGridUnloadingRow;
        }
        else
        {
            grid.LoadingRow -= onGridLoadingRow;
            grid.UnloadingRow -= onGridUnloadingRow;
        }
    }

    private static void refreshDataGridRowNumbers(object sender)
    {
        DataGrid grid = sender as DataGrid;
        if (grid == null)
            return;

        foreach (var item in grid.Items)
        {
            var row = (DataGridRow)grid.ItemContainerGenerator.ContainerFromItem(item);
            if (row != null)
                row.Header = row.GetIndex() + 1;
        }
    }

    private static void onGridUnloadingRow(object sender, DataGridRowEventArgs e)
    {
        refreshDataGridRowNumbers(sender);
    }

    private static void onGridLoadingRow(object sender, DataGridRowEventArgs e)
    {
        refreshDataGridRowNumbers(sender);
    }

    [AttachedPropertyBrowsableForType(typeof(DataGrid))]
    public static void SetRowNumbers(DependencyObject element, bool value)
    {
        element.SetValue(RowNumbersProperty, value);
    }

    public static bool GetRowNumbers(DependencyObject element)
    {
        return (bool) element.GetValue(RowNumbersProperty);
    }

    #endregion
}

@弗雷德里克·海德布拉德的回答对我很有用。谢谢

我添加了另一个属性来获取“offset”值，这样DataGrid可以从0或1（或任何设置）开始

要使用该行为，（注意“b”是名称空间）



修改后的类：

/// <summary>
/// Collection of DataGrid behavior
/// </summary>
public static class DataGridBehavior
{
    #region DisplayRowNumberOffset

    /// <summary>
    /// Sets the starting value of the row header if enabled
    /// </summary>
    public static DependencyProperty DisplayRowNumberOffsetProperty =
        DependencyProperty.RegisterAttached("DisplayRowNumberOffset",
                                            typeof(int),
                                            typeof(DataGridBehavior),
                                            new FrameworkPropertyMetadata(0, OnDisplayRowNumberOffsetChanged));

    public static int GetDisplayRowNumberOffset(DependencyObject target)
    {
        return (int)target.GetValue(DisplayRowNumberOffsetProperty);
    }

    public static void SetDisplayRowNumberOffset(DependencyObject target, int value)
    {
        target.SetValue(DisplayRowNumberOffsetProperty, value);
    }

    private static void OnDisplayRowNumberOffsetChanged(DependencyObject target, DependencyPropertyChangedEventArgs e)
    {
        DataGrid dataGrid = target as DataGrid;
        int offset = (int)e.NewValue;

        if (GetDisplayRowNumber(target))
        {
            WPFUtil.GetVisualChildCollection<DataGridRow>(dataGrid).
                    ForEach(d => d.Header = d.GetIndex() + offset);
        }
    }

    #endregion

    #region DisplayRowNumber

    /// <summary>
    /// Enable display of row header automatically
    /// </summary>
    /// <remarks>
    /// Source: 
    /// </remarks>
    public static DependencyProperty DisplayRowNumberProperty =
        DependencyProperty.RegisterAttached("DisplayRowNumber",
                                            typeof(bool),
                                            typeof(DataGridBehavior),
                                            new FrameworkPropertyMetadata(false, OnDisplayRowNumberChanged));

    public static bool GetDisplayRowNumber(DependencyObject target)
    {
        return (bool)target.GetValue(DisplayRowNumberProperty);
    }

    public static void SetDisplayRowNumber(DependencyObject target, bool value)
    {
        target.SetValue(DisplayRowNumberProperty, value);
    }

    private static void OnDisplayRowNumberChanged(DependencyObject target, DependencyPropertyChangedEventArgs e)
    {
        DataGrid dataGrid = target as DataGrid;
        if ((bool)e.NewValue == true)
        {
            int offset = GetDisplayRowNumberOffset(target);

            EventHandler<DataGridRowEventArgs> loadedRowHandler = null;
            loadedRowHandler = (object sender, DataGridRowEventArgs ea) =>
            {
                if (GetDisplayRowNumber(dataGrid) == false)
                {
                    dataGrid.LoadingRow -= loadedRowHandler;
                    return;
                }
                ea.Row.Header = ea.Row.GetIndex() + offset;
            };
            dataGrid.LoadingRow += loadedRowHandler;

            ItemsChangedEventHandler itemsChangedHandler = null;
            itemsChangedHandler = (object sender, ItemsChangedEventArgs ea) =>
            {
                if (GetDisplayRowNumber(dataGrid) == false)
                {
                    dataGrid.ItemContainerGenerator.ItemsChanged -= itemsChangedHandler;
                    return;
                }
                WPFUtil.GetVisualChildCollection<DataGridRow>(dataGrid).
                    ForEach(d => d.Header = d.GetIndex() + offset);
            };
            dataGrid.ItemContainerGenerator.ItemsChanged += itemsChangedHandler;
        }
    }

    #endregion // DisplayRowNumber
}

//
///数据网格行为的集合
/// 
公共静态类DataGridBehavior
{
#区域显示RowNumberOffset
/// 
///设置行标题的起始值（如果启用）
/// 
公共静态从属属性DisplayRowNumberOfSetProperty=
DependencyProperty.RegisterAttached（“DisplayRowNumberOfSet”，
类型（int），
类型（DataGridBehavior），
新的框架属性元数据（0，OnDisplayRowNumberOfSetChanged））；
公共静态int GetDisplayRowNumberOffset（DependencyObject目标）
{
返回（int）target.GetValue（DisplayRowNumberOffsetProperty）；
}
公共静态void SetDisplayRowNumberOffset（DependencyObject目标，int值）
{
target.SetValue（DisplayRowNumberOffsetProperty，value）；
}
私有静态无效OnDisplayRowNumberOfSetChanged（DependencyObject目标，DependencyPropertyChangedEventArgs e）
{
DataGrid DataGrid=目标为DataGrid；
int offset=（int）e.NewValue；
如果（GetDisplayRowNumber（目标））
{
GetVisualChildCollection（dataGrid）。
ForEach（d=>d.Header=d.GetIndex（）+偏移量）；
}
}
#端区
#区域显示行数
/// 
///启用r的显示
<Window
    ...
    xmlns:local="clr-namespace:Test"
    DataContext="{Binding RelativeSource={RelativeSource Mode=Self}}">
    <Window.Resources>
        <local:RowToIndexConv x:Key="RowToIndexConv"/>
    </Window.Resources>
        <DataGrid ItemsSource="{Binding GridData}">
            <DataGrid.RowHeaderTemplate>
                <DataTemplate>
                    <TextBlock Margin="2" Text="{Binding RelativeSource={RelativeSource AncestorType=DataGridRow}, Converter={StaticResource RowToIndexConv}}"/>
                </DataTemplate>
            </DataGrid.RowHeaderTemplate>
        </DataGrid>
</Window>

public class RowToIndexConv : IValueConverter
{

    #region IValueConverter Members

    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        DataGridRow row = value as DataGridRow;
        return row.GetIndex() + 1;
    }

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

    #endregion
}

public static class DataGridBehavior
{
    #region RowNumbers property

    public static readonly DependencyProperty RowNumbersProperty =
        DependencyProperty.RegisterAttached("RowNumbers", typeof (bool), typeof (DataGridBehavior), 
        new FrameworkPropertyMetadata(false, OnRowNumbersChanged));

    private static void OnRowNumbersChanged(DependencyObject source, DependencyPropertyChangedEventArgs args)
    {
        DataGrid grid = source as DataGrid;
        if (grid == null)
            return;
        if ((bool)args.NewValue)
        {
            grid.LoadingRow += onGridLoadingRow;
            grid.UnloadingRow += onGridUnloadingRow;
        }
        else
        {
            grid.LoadingRow -= onGridLoadingRow;
            grid.UnloadingRow -= onGridUnloadingRow;
        }
    }

    private static void refreshDataGridRowNumbers(object sender)
    {
        DataGrid grid = sender as DataGrid;
        if (grid == null)
            return;

        foreach (var item in grid.Items)
        {
            var row = (DataGridRow)grid.ItemContainerGenerator.ContainerFromItem(item);
            if (row != null)
                row.Header = row.GetIndex() + 1;
        }
    }

    private static void onGridUnloadingRow(object sender, DataGridRowEventArgs e)
    {
        refreshDataGridRowNumbers(sender);
    }

    private static void onGridLoadingRow(object sender, DataGridRowEventArgs e)
    {
        refreshDataGridRowNumbers(sender);
    }

    [AttachedPropertyBrowsableForType(typeof(DataGrid))]
    public static void SetRowNumbers(DependencyObject element, bool value)
    {
        element.SetValue(RowNumbersProperty, value);
    }

    public static bool GetRowNumbers(DependencyObject element)
    {
        return (bool) element.GetValue(RowNumbersProperty);
    }

    #endregion
}

<DataGrid ItemsSource="{Binding ...}"
      b:DataGridBehavior.DisplayRowNumberOffset="1"
      b:DataGridBehavior.DisplayRowNumber="True">

/// <summary>
/// Collection of DataGrid behavior
/// </summary>
public static class DataGridBehavior
{
    #region DisplayRowNumberOffset

    /// <summary>
    /// Sets the starting value of the row header if enabled
    /// </summary>
    public static DependencyProperty DisplayRowNumberOffsetProperty =
        DependencyProperty.RegisterAttached("DisplayRowNumberOffset",
                                            typeof(int),
                                            typeof(DataGridBehavior),
                                            new FrameworkPropertyMetadata(0, OnDisplayRowNumberOffsetChanged));

    public static int GetDisplayRowNumberOffset(DependencyObject target)
    {
        return (int)target.GetValue(DisplayRowNumberOffsetProperty);
    }

    public static void SetDisplayRowNumberOffset(DependencyObject target, int value)
    {
        target.SetValue(DisplayRowNumberOffsetProperty, value);
    }

    private static void OnDisplayRowNumberOffsetChanged(DependencyObject target, DependencyPropertyChangedEventArgs e)
    {
        DataGrid dataGrid = target as DataGrid;
        int offset = (int)e.NewValue;

        if (GetDisplayRowNumber(target))
        {
            WPFUtil.GetVisualChildCollection<DataGridRow>(dataGrid).
                    ForEach(d => d.Header = d.GetIndex() + offset);
        }
    }

    #endregion

    #region DisplayRowNumber

    /// <summary>
    /// Enable display of row header automatically
    /// </summary>
    /// <remarks>
    /// Source: 
    /// </remarks>
    public static DependencyProperty DisplayRowNumberProperty =
        DependencyProperty.RegisterAttached("DisplayRowNumber",
                                            typeof(bool),
                                            typeof(DataGridBehavior),
                                            new FrameworkPropertyMetadata(false, OnDisplayRowNumberChanged));

    public static bool GetDisplayRowNumber(DependencyObject target)
    {
        return (bool)target.GetValue(DisplayRowNumberProperty);
    }

    public static void SetDisplayRowNumber(DependencyObject target, bool value)
    {
        target.SetValue(DisplayRowNumberProperty, value);
    }

    private static void OnDisplayRowNumberChanged(DependencyObject target, DependencyPropertyChangedEventArgs e)
    {
        DataGrid dataGrid = target as DataGrid;
        if ((bool)e.NewValue == true)
        {
            int offset = GetDisplayRowNumberOffset(target);

            EventHandler<DataGridRowEventArgs> loadedRowHandler = null;
            loadedRowHandler = (object sender, DataGridRowEventArgs ea) =>
            {
                if (GetDisplayRowNumber(dataGrid) == false)
                {
                    dataGrid.LoadingRow -= loadedRowHandler;
                    return;
                }
                ea.Row.Header = ea.Row.GetIndex() + offset;
            };
            dataGrid.LoadingRow += loadedRowHandler;

            ItemsChangedEventHandler itemsChangedHandler = null;
            itemsChangedHandler = (object sender, ItemsChangedEventArgs ea) =>
            {
                if (GetDisplayRowNumber(dataGrid) == false)
                {
                    dataGrid.ItemContainerGenerator.ItemsChanged -= itemsChangedHandler;
                    return;
                }
                WPFUtil.GetVisualChildCollection<DataGridRow>(dataGrid).
                    ForEach(d => d.Header = d.GetIndex() + offset);
            };
            dataGrid.ItemContainerGenerator.ItemsChanged += itemsChangedHandler;
        }
    }

    #endregion // DisplayRowNumber
}

ICollectionView view = CollectionViewSource.GetDefaultView(_dataGrid.ItemsSource);
view.Refresh();