If you just want to know the meaning, then in my opinion, it's easier to put a converter on.<converter:DoNothingConverter x:Key="localDoNothingConverter"></converter:DoNothingConverter> In the connection, indicate: Converter={StaticResource localDoNothingConverter}}" public class DoNothingConverter: IValueConverter { public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { Debug.WriteLine(value.ToString()); //ну или еще чего здесь сами придумейте return value; } public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { return value; } }

First of all, you have collection private.Second, the connection requires a characteristic, that is:public ObservableCollection<string> collection {get; private set}

The link is successful if:Путь к источнику привязки разрешен. Преобразователь значений, если таковые имеются, способен преобразовать полученное значение. Полученное значение является допустимым для привязки свойства target (цель). (c) MSDNIn this case, it appears that one of these conditions is not fulfilled, which leads to Fail'u, probably the Binding itself (and not its meaning) becomes Null and, when attempting to operate, the NullReferenceException is intercepted somewhere in the subsoil of binding techniques and throwing the outer null or empty line.Installation BindingBase.FallbackValue solves the problem

For List<CollageModel> Try it. ObservableCollection<CollageModel>

Corrected by method Refresh private void ModelAuthorUpdated(object sender, ModelEventArgs<Author> e) { listView.Items.Refresh(); }

You broke the contract for DependencyProperty: yours. static- The field should be called TextValueProperty and SliderValueProperty (a) _propTextValue and _propSliderValue)Rename.Besides, you're somehow hoping that your setter will be called WPF-Freimvor. No, that's not guaranteed either. Link dependency property needs through property change callback:public double SliderValue { get { return (double) GetValue(SliderValueProperty); } set { SetValue(SliderValueProperty, value); } } public static readonly DependencyProperty SliderValueProperty = DependencyProperty.Register( "SliderValue", typeof(double), typeof(MainWindow), new FrameworkPropertyMetadata( 5.0, FrameworkPropertyMetadataOptions.BindsTwoWayByDefault, OnSliderChange)); static void OnSliderChange(DependencyObject o, DependencyPropertyChangedEventArgs args) { var self = (MainWindow)o; self.TextValue = args.NewValue.ToString(); } Or a little easier:public double SliderValue { get { return (double) GetValue(SliderValueProperty); } set { SetValue(SliderValueProperty, value); } } public static readonly DependencyProperty SliderValueProperty = DependencyProperty.Register( "SliderValue", typeof(double), typeof(MainWindow), new FrameworkPropertyMetadata( 5.0, FrameworkPropertyMetadataOptions.BindsTwoWayByDefault, (o, args) => o.SetValue(TextValueProperty, args.NewValue.ToString()));

[ViewToViewModel(MappingType = ViewToViewModelMappingType.ViewModelToView)] public bool IsTurnedOn { get { return (bool)GetValue(IsTurnedOnProperty); } set { SetValue(IsTurnedOnProperty, value); } } public static readonly DependencyProperty IsTurnedOnProperty = DependencyProperty.Register("IsTurnedOn", typeof(bool), typeof(ToggleButton), new FrameworkPropertyMetadata(true, FrameworkPropertyMetadataOptions.BindsTwoWayByDefault, OnIsTurnedOnChanged)); private static void OnIsTurnedOnChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) { var btn = d as ToggleButton; var vm = btn.ViewModel as ToggleButtonViewModel; if(vm.IsTurnedOn != btn.IsTurnedOn) vm.IsTurnedOn = btn.IsTurnedOn; }

Try using. Label or simply https://msdn.microsoft.com/en-us/library/system.windows.controls.accesstext.aspx instead TextBlockthe accelerators are being maintained.(And your Öffnen missing points over Ö.)With regard to &quot; incorrect reflection &quot; : Yours HierarchicalDataTemplate Definition contents for automatically produced subsidiary MenuItemHuh. If the contents are different MenuItemYou're just two. MenuItemUh, one on the other. Of course it doesn't look right.

The question is really good.It won't work. In order to link to and update VM data, a key to VM should be put in VM DynamicResource♪ (I understand you did.)Now we need to tie this key. There are several ways in which the common sense is to tie the key to something, and to change it and connect Dynamic Resource.Like that. Put the auxiliary class down:static class ResourceKeyBinding { // стандартное attached property ResourceKey public static object GetResourceKey(DependencyObject obj) => obj.GetValue(ResourceKeyProperty); public static void SetResourceKey(DependencyObject obj, object value) => obj.SetValue(ResourceKeyProperty, value); public static readonly DependencyProperty ResourceKeyProperty = DependencyProperty.RegisterAttached( "ResourceKey", typeof(object), typeof(ResourceKeyBinding), // callback при изменении значения ResourceKey new PropertyMetadata(OnResourceKeyChanged)); // стандартное attached property ResourceValue public static object GetResourceValue(DependencyObject obj) =&gt; obj.GetValue(ResourceValueProperty); public static void SetResourceValue(DependencyObject obj, object value) =&gt; obj.SetValue(ResourceValueProperty, value); public static readonly DependencyProperty ResourceValueProperty = DependencyProperty.RegisterAttached( "ResourceValue", typeof(object), typeof(ResourceKeyBinding)); // это будет вызвано при изменении значения ResourceKey: static void OnResourceKeyChanged( DependencyObject self, DependencyPropertyChangedEventArgs e) { // SetResourceReference устанавливает dynamic resource-привязку ((FrameworkElement)self).SetResourceReference(ResourceValueProperty, e.NewValue); } } Use this:<MenuItem Command="{Binding Path=Command}" local:ResourceKeyBinding.ResourceKey="{Binding Path=DisplayName}" Header="{Binding Path=(local:ResourceKeyBinding.ResourceValue), RelativeSource={RelativeSource Self}}" /> Explanation: We added two attached property: ResourceKeyBinding.ResourceKey and ResourceKeyBinding.ResourceValue♪ The first one is tied through Binding to VM. First to second DynamicResource with a key equal to the current value. Now. Header tied to this second attached property through Binding♪In principle, the code could be simplified by only one attached property:static class ResourceKeyBinding { // standard attached property ResourceKey public static object GetResourceKey(DependencyObject obj) => obj.GetValue(ResourceKeyProperty); public static void SetResourceKey(DependencyObject obj, object value) => obj.SetValue(ResourceKeyProperty, value); public static readonly DependencyProperty ResourceKeyProperty = DependencyProperty.RegisterAttached( "ResourceKey", typeof(object), typeof(ResourceKeyBinding), new PropertyMetadata((d, e) =&gt; ((FrameworkElement)d).SetResourceReference( MenuItem.HeaderProperty, e.NewValue))); } and using simply<MenuItem Command="{Binding Path=Command}" local:ResourceKeyBinding.ResourceKey="{Binding Path=DisplayName}"/> But that would work. only c MenuItemAnd you're probably gonna need to run other types of elements.

Your question isn't that simple. In fact, the problem is how to get a typed value instead of MyEnum:A.A1 (this text of XAML is as simple as a line). Simple solution with x:Static:Text="{Binding Path=.[{x:Static MyEnum:A.A1}]" It does not pass: it appears that the markup extension is not recognized within the argument. Path♪But there's an easy bypass. Because your index is a constant, you don't need to monitor its changes. Which means you can just tie it through the converter.Writing:public class IndexerConverter : IValueConverter { public object Convert(object value, Type targetType, object parameter, CultureInfo culture) { if (value == null || value == DependencyProperty.UnsetValue) return value; // мы не знаем точный тип - значит, вызываем через рефлексию return value.GetType() .GetMethod("get_Item") // так "внутри" называется indexer .Invoke(value, new object[] { parameter }); } public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) { throw new NotImplementedException(); } } Now XAML:<Window x:Class="..." xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:MyEnum="clr-namespace:..." ...> <Window.Resources> <MyEnum:IndexerConverter x:Key="IndexerConverter"/> </Window.Resources> <TextBlock Text="{Binding Converter={StaticResource IndexerConverter}, ConverterParameter={x:Static MyEnum:A.A1}}"/> </Window> Alternative solution with more precision Path I can find you. https://stackoverflow.com/a/9371493/276994 :[ContentProperty("Parameters")] public class PathConstructor : MarkupExtension { public string Path { get; set; } public IList Parameters { get; set; } public PathConstructor() { Parameters = new List&lt;object&gt;(); } public PathConstructor(string path, object p0) { Path = path; Parameters = new[] { p0 }; } public override object ProvideValue(IServiceProvider serviceProvider) { return new PropertyPath(Path, Parameters.Cast&lt;object&gt;().ToArray()); } } and XAML:<TextBlock Text="{Binding Path={MyEnum:PathConstructor [(0)], {x:Static MyEnum:A.A1}}}"/>

I'll start with an expanded example from http://docs.oracle.com/javafx/2/ui_controls/table-view.htm :public class TableViewSample extends Application { public static final String Column1MapKey = "String"; public static final String Column2MapKey = "Integer"; public static void main(String[] args) { launch(args); } @Override public void start(Stage stage) { Scene scene = new Scene(new Group()); stage.setTitle("Table View"); stage.setWidth(300); stage.setHeight(500); final Label label = new Label("TODO List"); label.setFont(new Font("Arial", 20)); TableColumn&lt;Map, String&gt; firstDataColumn = new TableColumn&lt;&gt;("Description"); TableColumn&lt;Map, String&gt; secondDataColumn = new TableColumn&lt;&gt;("Value"); firstDataColumn.setCellValueFactory(new MapValueFactory(Column1MapKey)); firstDataColumn.setMinWidth(130); secondDataColumn.setCellValueFactory(new MapValueFactory(Column2MapKey)); secondDataColumn.setMinWidth(130); TableView table_view = new TableView&lt;&gt;(generateDataInMap()); table_view.setEditable(true); table_view.getSelectionModel().setCellSelectionEnabled(true); table_view.getColumns().setAll(firstDataColumn, secondDataColumn); firstDataColumn.setCellFactory(new Callback&lt;TableColumn&lt;Map, String&gt;, TableCell&lt;Map, String&gt;&gt;() { @Override public TableCell call(TableColumn p) { return new TextFieldTableCell(new DefaultStringConverter()); } }); secondDataColumn.setCellFactory(new Callback&lt;TableColumn&lt;Map, String&gt;, TableCell&lt;Map, String&gt;&gt;() { @Override public TableCell call(TableColumn p) { return new TextFieldTableCell(new IntegerStringConverter()); } }); final VBox vbox = new VBox(); vbox.setSpacing(5); vbox.setPadding(new Insets(10, 0, 0, 10)); vbox.getChildren().addAll(label, table_view); ((Group) scene.getRoot()).getChildren().addAll(vbox); stage.setScene(scene); stage.show(); } private ObservableList&lt;Map&gt; generateDataInMap() { int max = 10; ObservableList&lt;Map&gt; allData = FXCollections.observableArrayList(); for (int i = 1; i &lt; max; i++) { Map&lt;String, Property&lt;?&gt;&gt; dataRow = new HashMap&lt;&gt;(); SimpleStringProperty value1 = new SimpleStringProperty("string " + i); SimpleIntegerProperty value2 = new SimpleIntegerProperty(i); dataRow.put(Column1MapKey, value1); dataRow.put(Column2MapKey, value2); allData.add(dataRow); } return allData; } } And on the question:Call attention to the CellValueFactory method - fills boxes, while the dynamic change is the result of the setCellFactory method, which, through a long chain, is responsible for interaction with the Property object - the original example shows the work with the abstract Class StringConverter - a good way out of many situations.Yeah, great janerik.UPD: Like SimpleObjectProperty Bread class:class Wrapper { class InnerWrapper&lt;T&gt; extends SimpleObjectProperty&lt;T&gt; { @Override public void set(T newValue) { T temp = null; if (newValue.getClass().equals(Integer.class)) temp = newValue; else temp = (T) (((String) newValue).matches("\\d+") ? Integer.valueOf((String) newValue) : newValue.toString()); super.set(temp); } } private InnerWrapper inner = new InnerWrapper(); public Object getNut() { return nutProperty().get(); } public final SimpleObjectProperty nutProperty() { return inner; } public void setNut(Object candiate) { nutProperty().set(candiate); } } Example of factory: firstDataColumn.setCellValueFactory(new Callback<CellDataFeatures<Map, String>, ObservableValue<String>>() { public ObservableValue<String> call(CellDataFeatures<Map, String> p) { return ((Wrapper)p.getValue().get(Column1MapKey)).nutProperty(); } });

In general, systheta. Page/Frame It's cosmic and nothing to do with it. Page replaced ContentControl And it's earned right.

For example, do your own VM for the right fields and tie it to her. It's pressurized. Save Transfer the data from this new VM to the main.In your case, it would look like,var temporaryContractor = contractor.Clone(); // (*) var vm = (ContractorDetailsWindowViewModel)contractorDetailsView.DataContext; vm.Contractor = temporaryContractor; var contractorDetailsView = new ContractorDetailsWindow() { Owner = Application.Current.MainWindow, WindowStartupLocation = WindowStartupLocation.CenterOwner }; bool? dialogResult = contractorDetailsView.ShowDialog(); if (dialogResult == true) // нужна явная проверка, т. к. может быть false или null contractor.LoadFrom(temporaryContractor); // () You're gonna need to finish the two methods mentioned in the lines identified. ()♪ The first method must produce a copy of the object, the second must take the properties of the copy.class ContractorType { // текущий код класса public ContractorType Clone() { return new ContractorType() { OKTMO = OKTMO, // ну и остальные тут же }; } public void LoadFrom(ContractorType another) { OKTMO = another.OKTMO; // и т. д. } } Or you can save on the second method if you succeed. contractor The place where he comes from is new. But for that, we need to get him to that point.

You can use a double link through. Tag:<Setter Property="Tag"> <Setter.Value> <MultiBinding Converter="{StaticResource m_GetObjectPropertyConverter}"> <Binding/> <Binding Source="{x:Static DataViewModels:PropertysViewModel.TypeSS}"/> </MultiBinding> </Setter.Value> </Setter> <Setter Property="Text" Value="{Binding Tag.ObjectLink, RelativeSource={RelativeSource Self}}"/>

I did it through ItemTemplate, thank you @VladD for clarification.<MenuItem.ItemTemplate> <DataTemplate> <Grid> <Grid.ColumnDefinitions> <ColumnDefinition Width="Auto"/> <ColumnDefinition Width="*"/> </Grid.ColumnDefinitions> <Border BorderBrush="Black" BorderThickness="1"> <Grid> <Image Width="16" Height="16" Source="{Binding Path=IconSource}" /> <Image Source="Маханькая_иконошка" Width="8" Height="8" VerticalAlignment="Top" HorizontalAlignment="Left"/> </Grid> </Border> <TextBlock Grid.Column="1" Text="{Binding Path=TypeObjectName}"/> </Grid> </DataTemplate> </MenuItem.ItemTemplate>

We need to add. UpdateSourceTrigger=PropertyChanged Binding.If I've changed the data, I've pressed the interer, but the line hasn't changed, and the text in a class copy has not changed.I don't know how much it's worth. UpdateSourceTrigger=LostFocusi.e. changes occur in the loss of focus, as in your case.<Grid> <DataGrid.Columns> <DataGridTextColumn Binding="{Binding Path=Text, UpdateSourceTrigger=PropertyChanged}"> </DataGrid.Columns> </Grid>

The images in the database are stored as a set of bikes, in general, they are understood without converting:<Image Name="Picture" Source="{Binding}"> </Image> However, it's a set of bikes, there's a nuance in the blank, and the picture itself needs to be converted into byte[] like:private byte[] set_bitmat(Bitmap bmp) { using (MemoryStream ms = new MemoryStream()) { bmp.Save(ms, bmp.RawFormat); return ms.ToArray(); } } And the result is to write to the database.

If there is no specific link to use the Task Force and async/await. BackgroundWorker-s were still winforms and somewhat outdated. The code will be easier and better. As for the window, to get out of the stream, it looks weird, because it can be done without a window:Thread thread = new Thread(MethodWhichRequiresSTA); thread.SetApartmentState(ApartmentState.STA); //Set the thread to STA thread.Start(); thread.Join(); //Wait for the thread to end And I wonder why STA is what it is. Usually, the treatment is performed in the background, and the certificate of compliance so far in the UI flow. For example: /// <summary> /// Контекст асинхронной обработки Таска. Если нужны параметры — добавляй их в конструктор. /// </summary> public class BackgroundWorkerAsyncContext : IDisposable { #region Public Methods public Task&lt;object&gt; ProccessTrack() { var task = new Task&lt;object&gt;(() =&gt; { //тут должна быть обработка какая-то. DateTime a = DateTime.Now; Thread.Sleep(1000); Console.WriteLine((DateTime.Now - a).TotalMilliseconds); return new object(); }); task.Start(); return task; } public void Dispose() { } #endregion Public Methods } /// &lt;summary&gt; /// ViewModel нашего трека. Имеет имя, флаг того, что трек сейчас в обработке и соманду обработки. /// &lt;/summary&gt; public class TrackViewModel : ViewModelBase { #region Private Fields private RelayCommand _compressCommand; private bool _isInProcess; private string _name; #endregion Private Fields #region Public Properties public ICommand CompressCommand { get { return _compressCommand ?? (_compressCommand = new RelayCommand(async () =&gt; { try { //выставяем флаг обработки IsInProcess = true; //сама обработка using (var context = new BackgroundWorkerAsyncContext()) { var result = await context.ProccessTrack(); //result - выхлоп от таска, в данном примере object. } } catch (Exception) { //что то с исключением сделать. } finally { //убираем флаг. IsInProcess = false; } })); } } public bool IsInProcess { get { return _isInProcess; } set { if (value != _isInProcess) { _isInProcess = value; RaisePropertyChanged(); } } } public string Name { get { return _name; } set { if (value != _name) { _name = value; RaisePropertyChanged(); } } } #endregion Public Properties }

The problem appears to be here:public int MyVar { get; set; } You have to do it. INotifyPropertyChanged♪ Somehow:class VM : INotifyPropertyChanged { int myVar = 0; public int MyVar { get { return myVar; } set { if (myVar != value) { myVar = value; NotifyPropertyChanged(); } } } void NotifyPropertyChanged([CallerMemberName] string propertyName = null) { PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName)); } public event PropertyChangedEventHandler PropertyChanged; }

What's complicated?Make an converter:class UriConverter : IValueConverter { public object Convert(object value, Type targetType, object parameter, CultureInfo culture) { var id = (string)value; return new Uri("http://somesite.ru/user?id=" + id); } public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) { throw new NotSupportedException(); } } Then put it in your window's resources:<Window.Resources> <local:UriConverter x:Key="UriConverter"/> </Window.Resources> And use it to convert:<TextBlock> <Hyperlink NavigateUri="{Binding Mode=OneWay, Converter={StaticResource UriConverter}}" RequestNavigate="OnRequestNavigate"><Run Text="{Binding NavigateUri, RelativeSource={RelativeSource FindAncestor, AncestorType=Hyperlink}}"/></Hyperlink> </TextBlock> Subscription RequestNavigate It's necessary to make references.void OnRequestNavigate(object sender, System.Windows.Navigation.RequestNavigateEventArgs e) { var uri = e.Uri.AbsoluteUri; Task.Run(() => Process.Start(uri)); e.Handled = true; } I think everything should work.