Saving Grid (Dev Express) Layout with MVVM (code from DevExpress support), mvvmdevexpress

Saving Grid (Dev Express) Layout with MVVM (code from DevExpress support), mvvmdevexpress

<Window x:Class="WPFGridTest.MainWindow"        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"        xmlns:dxg="http://schemas.devexpress.com/winfx/2008/xaml/grid"        xmlns:dxgt="http://schemas.devexpress.com/winfx/2008/xaml/grid/themekeys"        xmlns:dxe="http://schemas.devexpress.com/winfx/2008/xaml/editors"        xmlns:dx="http://schemas.devexpress.com/winfx/2008/xaml/core"        xmlns:dxb="http://schemas.devexpress.com/winfx/2008/xaml/bars"        xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"        xmlns:dxlc="http://schemas.devexpress.com/winfx/2008/xaml/layoutcontrol"        xmlns:local="clr-namespace:WPFGridTest"        Title="MainWindow" Height="350" Width="525">    <Window.DataContext>        <local:VM/>    </Window.DataContext>    <Window.Resources>        <local:SaveRestoreCommands x:Key="saveRestoreLayoutCommands" Path="1.xml"/>    </Window.Resources>    <Grid>        <Grid.RowDefinitions>            <RowDefinition Height="Auto"/>            <RowDefinition Height="*"/>        </Grid.RowDefinitions>        <StackPanel Orientation="Horizontal">            <Button Content="Save" Command="{Binding Path=SaveLayoutCommand, Source={StaticResource saveRestoreLayoutCommands}}" CommandParameter="{Binding ElementName= g}"/>            <Button Content="Restore" Command="{Binding Path=RestoreLayoutCommand, Source={StaticResource saveRestoreLayoutCommands}}" CommandParameter="{Binding ElementName=g}"/>        </StackPanel>        <dxg:GridControl x:Name="g" Grid.Row="1" ItemsSource="{Binding Source}">            <dxg:GridControl.View>                <dxg:TableView x:Name="v"/>            </dxg:GridControl.View>            <dxg:GridControl.Columns>                <dxg:GridColumn x:Name="c1" FieldName="ID"/>                <dxg:GridColumn x:Name="c2" FieldName="Value"/>            </dxg:GridControl.Columns>        </dxg:GridControl>    </Grid></Window>

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Windows;using System.Windows.Controls;using System.Windows.Data;using System.Windows.Documents;using System.Windows.Input;using System.Windows.Media;using System.Windows.Media.Imaging;using System.Windows.Navigation;using System.Windows.Shapes;using DevExpress.Xpf.Grid;using DevExpress.Xpf.Core.Native;using DevExpress.Xpf.Bars;using System.ComponentModel;using System.Windows.Interactivity;using DevExpress.Xpf.Core;using System.ComponentModel.DataAnnotations;using System.Data;using System.Collections.ObjectModel;using DevExpress.Xpf.Editors;using DevExpress.Data;using DevExpress.Xpf.Editors.Settings;using DevExpress.Xpf.Core.Commands;using System.IO;namespace WPFGridTest {    /// <summary>    /// Interaction logic for MainWindow.xaml    /// </summary>    public partial class MainWindow : Window {        public MainWindow() {            InitializeComponent();        }    }    public class VM {        public TestDataList Source { get; set; }        public VM() {            Source = TestDataList.Create();        }    }    public class TestDataList : ObservableCollection<TestDataItem> {        public static TestDataList Create() {            TestDataList res = new TestDataList();            TestDataItem item = new TestDataItem();            item.ID = 0;            item.Value = "A";            res.Add(item);            item = new TestDataItem();            item.ID = 1;            item.Value = "b";            res.Add(item);            item = new TestDataItem();            item.ID = 2;            item.Value = "C";            res.Add(item);            item = new TestDataItem();            item.ID = 3;            item.Value = "C";            res.Add(item);            return res;        }    }    public class TestDataItem {        public int ID { get; set; }        public string Value { get; set; }    }    public class SaveRestoreLayoutCommandBase : ICommand {        internal string Path { get; set; }        public virtual bool CanExecute(object parameter) {            if (string.IsNullOrEmpty(Path)) return false;            return true;        }        public event EventHandler CanExecuteChanged;        public virtual void Execute(object parameter) {            if (!(parameter is GridControl)) throw new Exception();        }        internal void RaiseCanExecuteChanged() {            if (CanExecuteChanged != null) CanExecuteChanged(this, EventArgs.Empty);        }    }    public class SaveLayoutCommand : SaveRestoreLayoutCommandBase {        public event EventHandler Executed;        public override void Execute(object parameter) {            base.Execute(parameter);            ((GridControl)parameter).SaveLayoutToXml(Path);            if (Executed != null) Executed(this, EventArgs.Empty);        }    }    public class RestoreLayoutCommand : SaveRestoreLayoutCommandBase {        public override bool CanExecute(object parameter) {            if (!base.CanExecute(parameter) || !File.Exists(Path))                return false;            return true;        }        public override void Execute(object parameter) {            base.Execute(parameter);            ((GridControl)parameter).RestoreLayoutFromXml(Path);        }    }    public class SaveRestoreCommands {        string path;        public string Path { get { return path; }            set {                path = value;                SaveLayoutCommand.Path = path;                RestoreLayoutCommand.Path = path;            }        }        public SaveLayoutCommand SaveLayoutCommand { get; private set; }        public RestoreLayoutCommand RestoreLayoutCommand { get; private set; }        public SaveRestoreCommands() {            SaveLayoutCommand = new SaveLayoutCommand() { Path = this.Path };            RestoreLayoutCommand = new RestoreLayoutCommand() { Path = this.Path };            SaveLayoutCommand.Executed +=new EventHandler(SaveLayoutCommand_Executed);        }        void SaveLayoutCommand_Executed(object sender, EventArgs e) {            if (RestoreLayoutCommand != null) RestoreLayoutCommand.RaiseCanExecuteChanged();        }    }}