HandyControl/src/Shared/HandyControl_Shared/Controls/Attach/GridAttach.cs

using System;
using System.Windows;
using System.Windows.Controls;

namespace HandyControl.Controls
{
    public class GridAttach
    {
        public static readonly DependencyProperty NameProperty = DependencyProperty.RegisterAttached(
            "Name", typeof(string), typeof(GridAttach), new PropertyMetadata(default(string)));

        public static void SetName(DependencyObject element, string value)
            => element.SetValue(NameProperty, value);

        public static string GetName(DependencyObject element)
            => (string) element.GetValue(NameProperty);

        public static readonly DependencyProperty RowNameProperty = DependencyProperty.RegisterAttached(
            "RowName", typeof(string), typeof(GridAttach), new PropertyMetadata(default(string), OnRowNameChanged));

        private static void OnRowNameChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            if (d is FrameworkElement frameworkElement)
            {
                if (e.NewValue is string rowName)
                {
                    if (string.IsNullOrEmpty(rowName))
                    {
                        return;
                    }

                    if (frameworkElement.Parent is Grid grid)
                    {
                        for (var i = 0; i < grid.RowDefinitions.Count; i++)
                        {
                            var gridRowDefinition = grid.RowDefinitions[i];
                            var gridRowName = GetName(gridRowDefinition);

                            if (!string.IsNullOrEmpty(gridRowName) &&
                                gridRowName.Equals(rowName, StringComparison.Ordinal))
                            {
                                Grid.SetRow(frameworkElement, i);
                                return;
                            }
                        }
                    }
                }
            }
        }

        public static void SetRowName(DependencyObject element, string value)
            => element.SetValue(RowNameProperty, value);

        public static string GetRowName(DependencyObject element)
            => (string) element.GetValue(RowNameProperty);

        public static readonly DependencyProperty ColumnNameProperty = DependencyProperty.RegisterAttached(
            "ColumnName", typeof(string), typeof(GridAttach), new PropertyMetadata(default(string), OnColumnNameChanged));

        private static void OnColumnNameChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            if (d is FrameworkElement frameworkElement)
            {
                if (e.NewValue is string columnName)
                {
                    if (string.IsNullOrEmpty(columnName))
                    {
                        return;
                    }

                    if (frameworkElement.Parent is Grid grid)
                    {
                        for (var i = 0; i < grid.ColumnDefinitions.Count; i++)
                        {
                            var gridColumnDefinition = grid.ColumnDefinitions[i];
                            var gridColumnName = GetName(gridColumnDefinition);

                            if (!string.IsNullOrEmpty(gridColumnName) &&
                                gridColumnName.Equals(columnName, StringComparison.Ordinal))
                            {
                                Grid.SetColumn(frameworkElement, i);
                                return;
                            }
                        }
                    }
                }
            }
        }

        public static void SetColumnName(DependencyObject element, string value)
            => element.SetValue(ColumnNameProperty, value);

        public static string GetColumnName(DependencyObject element)
            => (string) element.GetValue(ColumnNameProperty);
    }
}