WPF i MVVM: Zapisz pozycję ScrollViewer i ustaw ją przy ponownym załadowaniu

<Window x:Class="ScrollTest.TestWindow"

 xmlns="[url=http://schemas.microsoft.com/winfx/2006/xaml/presentation"]http://schemas.microsoft.com/w ... ot%3B[/url]

 xmlns:x="[url=http://schemas.microsoft.com/winfx/2006/xaml"]http://schemas.microsoft.com/winfx/2006/xaml"[/url]

 Title="TestWindow" Height="200" Width="300"

 Loaded="OnLoaded"

 Closing="OnClosing">

 <Grid>

 <ScrollViewer Name="_scroll" VerticalScrollBarVisibility="Auto">

 <StackPanel>

 <Button Content="Click me"/>

 <Button Content="Click me"/>

 <Button Content="Click me"/>

 <Button Content="Click me"/>

 <Button Content="Click me"/>

 <Button Content="Click me"/>

 <Button Content="Click me"/>

 <Button Content="Click me"/>

 <Button Content="Click me"/>

 <Button Content="Click me"/>

 <Button Content="Click me"/>

 <Button Content="Click me"/>

 <Button Content="Click me"/>

 <Button Content="Click me"/>

 <Button Content="Click me"/>

 <Button Content="Click me"/>

 </StackPanel>

 </ScrollViewer>

 </Grid>

</Window>

using System;

using System.ComponentModel;using System.Windows;

namespace ScrollTest

{

 public partial class TestWindow : Window

 {

 public TestWindow()

 {

 InitializeComponent();

 } private void OnLoaded(object sender, RoutedEventArgs e)

 {

 _scroll.ScrollToVerticalOffset((DataContext as VM).ScrollOffset);

 } private void OnClosing(object sender, CancelEventArgs e)

 {

 (DataContext as VM).ScrollOffset = _scroll.VerticalOffset;

 }

 } public class VM

 {

 public double ScrollOffset { get; set; }

 }

}

private void OnOpenOpenTestWindow(object sender, RoutedEventArgs e)

{

 TestWindow testWindow = new TestWindow();

 testWindow.DataContext = _vm;

 testWindow.Show();

}private VM _vm = new VM();

contentScrollViewer.ScrollToVerticalOffset(50);

ScrollBar

Position