using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Markup;

namespace FWindSoft.Wpf
{
    public class DataRowNoExtension : MarkupExtension
    {        
        public DataRowNoExtension()
        {
        }
      
        public override object ProvideValue(IServiceProvider serviceProvider)
        {
            var targetProvider = (IProvideValueTarget)serviceProvider.GetService(typeof(IProvideValueTarget));
            // MarkupExtension 在样式模板中，返回 this 以延迟提供值。
            //if (service.TargetObject.GetType().Name.EndsWith("SharedDp")) return this;
            // 如果不是 FrameworkElement，那么返回 this 以延迟提供值。
            FrameworkElement target = targetProvider.TargetObject as FrameworkElement;
            if (target == null) return this;
            //var target = (FrameworkElement)targetProvider.TargetObject;
            var row = target.GetParentType<DataGridRow>();
            if (row == null)
                return 0;
            return row.GetIndex() +1 ;
        }
    }
}