WPF:DataGrid 自動生成行號

　　下面給大家分享一種通過 DataGridRowHeader 自動生成 DataGrid 數據行行號的方式。只需一個 ValueConverter 就能搞定。

1. 值轉換器

       class AutoNumberValueConverter : IMultiValueConverter
       {
           #region IMultiValueConverter 成員
   
           public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture)
           {
               var item = values[0];
               var items = values[1] as ItemCollection;
   
               var index = items.IndexOf(item);
               return (index + 1).ToString();
           }
   
           public object[] ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture)
           {
               return null;
           }
   
           #endregion
       }

    

2. 前台代碼

   <Window x:Class="DataGridAutoRowNumberDemo.MainWindow"
           xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
           xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
           xmlns:demo="clr-namespace:DataGridAutoRowNumberDemo"
           Title="MainWindow"
           Width="525"
           Height="350">
       <Window.Resources>
           <demo:AutoNumberValueConverter x:Key="autoNumberValueConverter" />
       </Window.Resources>
       <DataGrid x:Name="dataGrid">
           <DataGrid.RowHeaderStyle>
               <Style TargetType="{x:Type DataGridRowHeader}">
                   <Setter Property="Content">
                       <Setter.Value>
                           <MultiBinding Converter="{StaticResource autoNumberValueConverter}">
                               <Binding />
                               <Binding Path="Items" RelativeSource="{RelativeSource AncestorType={x:Type DataGrid}}" />
                           </MultiBinding>
                       </Setter.Value>
                   </Setter>
               </Style>
           </DataGrid.RowHeaderStyle>
       </DataGrid>
   </Window>

   就此搞定！
   示例代碼：下載