WPF:DataGrid 自动生成行号

　　下面给大家分享一种通过 DataGridRowHeader 自动生成 DataGrid 数据行行号的方式。只需一个 ValueConverter 就能搞定。

1. 值转换器

    1     class AutoNumberValueConverter : IMultiValueConverter
    2     {
    3         #region IMultiValueConverter 成员
    4 
    5         public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    6         {
    7             var item = values[0];
    8             var items = values[1] as ItemCollection;
    9 
   10             var index = items.IndexOf(item);
   11             return (index + 1).ToString();
   12         }
   13 
   14         public object[] ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture)
   15         {
   16             return null;
   17         }
   18 
   19         #endregion
   20     }

    

2. 前台代码

    1 <Window x:Class="DataGridAutoRowNumberDemo.MainWindow"
    2         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    3         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    4         xmlns:demo="clr-namespace:DataGridAutoRowNumberDemo"
    5         Title="MainWindow"
    6         Width="525"
    7         Height="350">
    8     <Window.Resources>
    9         <demo:AutoNumberValueConverter x:Key="autoNumberValueConverter" />
   10     </Window.Resources>
   11     <DataGrid x:Name="dataGrid">
   12         <DataGrid.RowHeaderStyle>
   13             <Style TargetType="{x:Type DataGridRowHeader}">
   14                 <Setter Property="Content">
   15                     <Setter.Value>
   16                         <MultiBinding Converter="{StaticResource autoNumberValueConverter}">
   17                             <Binding />
   18                             <Binding Path="Items" RelativeSource="{RelativeSource AncestorType={x:Type DataGrid}}" />
   19                         </MultiBinding>
   20                     </Setter.Value>
   21                 </Setter>
   22             </Style>
   23         </DataGrid.RowHeaderStyle>
   24     </DataGrid>
   25 </Window>

   就此搞定！
   示例代码：下载