MARKUS

using System;

using System.Collections.Generic;

using System.Linq;

using System.Linq.Expressions;

using System.Reflection;

using System.Text;

using System.Threading.Tasks;

using System.Windows;

using System.Windows.Data;

using System.Windows.Media;

using System.Windows.Shapes;

using Telerik.Windows.Controls;

namespace KCOM.Behaviors

{

    public class GridViewAutoWidthBehavior

    {

        private readonly RadGridView gridView = null;

        public static bool GetIsEnabled(DependencyObject obj)

        {

            return (bool)obj.GetValue(IsEnabledProperty);

        }

        public static void SetIsEnabled(DependencyObject obj, bool value)

        {

            obj.SetValue(IsEnabledProperty, value);

        }

        // Using a DependencyProperty as the backing store for IsEnabled.  This enables animation, styling, binding, etc...

        public static readonly DependencyProperty IsEnabledProperty =

            DependencyProperty.RegisterAttached("IsEnabled", typeof(bool), typeof(GridViewAutoWidthBehavior), new PropertyMetadata(false, OnIsEnabledChanged));

        private static void OnIsEnabledChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)

        {

            RadGridView grid = d as RadGridView;

            if (grid != null)

            {

                var behavior = new GridViewAutoWidthBehavior(grid);

            }

        }

        public GridViewAutoWidthBehavior(RadGridView grid)

        {

            this.gridView = grid;

            if (this.gridView != null)

            {

                this.gridView.LoadingRowDetails += new EventHandler<Telerik.Windows.Controls.GridView.GridViewRowDetailsEventArgs>(OnLoadingRowDetails);

            }

        }

        void OnLoadingRowDetails(object sender, Telerik.Windows.Controls.GridView.GridViewRowDetailsEventArgs e)

        {

            var widthProxy = new WidthProxy();

            widthProxy.TargetElement = e.DetailsElement;

            widthProxy.SetBinding(WidthProxy.WidthProperty, new Binding("ActualWidth") { Source = sender as RadGridView });

        }

    }

}