WPF mvvm模式下，DataGrid自动刷新行号
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
namespace IngoDesignPDMS
{
/// <summary>
/// 显示行号
/// </summary>
public 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
}
}
.xaml页面
控件顶部增加xmlns:local="clr-namespace:IngoDesignPDMS"
DataGrid应用
<DataGrid Margin="0,0,0,5" x:Name="dgTopLine" CanUserAddRows="False" AutoGenerateColumns="False" CanUserSortColumns="False" CanUserResizeRows="False" Grid.Column="2" Grid.RowSpan="6"
local:DataGridBehavior.RowNumbers="True" ItemsSource="{Binding ListTopLine}" SelectedItem="{Binding SelectTopLine}" SelectItems="{Binding SelectDatas}" SelectionChanged="dgTopLine_SelectionChanged">
<DataGrid.Columns>
<DataGridTextColumn Header="X起始位置" IsReadOnly="True" Width="Auto" Binding="{Binding Path=XStartPostion}"></DataGridTextColumn>
<DataGridTextColumn Header="Y起始位置" IsReadOnly="True" Width="Auto" Binding="{Binding Path=YStartPostion}"></DataGridTextColumn>
<DataGridTextColumn Header="X结束位置" IsReadOnly="True" Width="Auto" Binding="{Binding Path=XEndPostion}"></DataGridTextColumn>
<DataGridTextColumn Header="Y结束位置" IsReadOnly="True" Width="Auto" Binding="{Binding Path=YEndPostion}"></DataGridTextColumn>
<DataGridTextColumn Header="半径" IsReadOnly="True" Width="Auto" Binding="{Binding Path=Radius}"></DataGridTextColumn>
<DataGridCheckBoxColumn Header="是否顺时针转" IsReadOnly="True" Width="Auto" Binding="{Binding Path=IsClockwise}"></DataGridCheckBoxColumn>
<DataGridTextColumn Header="偏移设定" IsReadOnly="True" Width="Auto" Binding="{Binding Path= OffsetSetting}"></DataGridTextColumn>
</DataGrid.Columns>
</DataGrid>
参考资料：
https://stackoverflow.com/questions/4663771/wpf-4-datagrid-getting-the-row-number-into-the-rowheader
