binding

问题 This question already has answers here : Difference between Dynamic and Static type assignments in Java (5 answers) Closed 4 years ago . Say I declare the following: Cat elsa = new Lion(); Lion extends Cat. If I declare it this way, will elsa be a cat having All of the methods of a cat or will it be a Lion, having all of the methods of both lion and cat This exact question is not addressed in other questions that I could find. 回答1: The object you create is of type Lion and has all of the

问题 I have a entity of some datasource. It has List of object Pojo. It can be get by ds.getRows(). I'm trying to bind TableView on this list very hard. tblHlp.itemsProperty().bindBidirectional(new SimpleListProperty<>(FXCollections.observableArrayList(ds.getRows()))); When I change that ObservableList which I created FXCollections.observableArrayList(ds.getRows())) tableView is changed too. But I want to get the same effect when I change List in ds (ds.getRows). Any ideas? 回答1: I don't think you

问题 I am trying to put the content of the one column table into the listbox . I use this code to do that. listBox1.DataContext = ds.Tables[0]; I also tried to use this code listBox1.ItemsSource = ds.Tables[0]; and both didn't work. Any idea how can I do that? namespace itinventory { /// <summary> /// Interaction logic for MainWindow.xaml /// </summary> public partial class MainWindow : Window { SqlConnection con ; SqlDataAdapter da ; DataSet ds; public MainWindow() { InitializeComponent(); con =

问题 The summary of my problem: I had created a UserControl where I bound my dependency property "Scheme" to the Color property of a GradientStop , and it worked perfectly. Now, after converting my UserControl to a custom control, this binding no longer works, and I don't know why. This is how I declared my resource dictionaries for my UserControl in the UserControl1.xaml file. In UserControl1.xaml : <!-- Resources --> <UserControl.Resources> <ResourceDictionary> <ResourceDictionary

问题 I have a ListView that display a list of CheckBoxes XAML below. The Checkbox is a custom class, the code is below. The initial state of the Checkbox is set correctly. However, when the Checkbox is clicked, it should become disabled (IsEnabled = False), but this doesn't happen, despite having implemented INotify code, shown below, in the custom class (although, I suspect the error is here somewhere, or the XAML markup is wrong). I have even tried to force a binding update on the Click event,

问题 Due to an unsolved issue in my current project [ Weird scrollbar UI in hosted WPF composite control ], I've had to defer to workarounds. One such idea I came up with was to keep the ScrollViewer in question in sync with a Windows Forms ScrollBar (horizontal and vertical). How would I go about doing that? In essence, I want the WinForms scrollbar(s) to work like the ScrollViewers (in terms of dragging and events suchlike). 回答1: I think there's no any other way than send/listen to the lo-level

问题 I have a ListView called lv with three columns. What's the quickest and easiest way to add items in it during runtime? I am using WPF. 回答1: Try this: <ListView x:Name="lv" ItemsSource="{Binding Path=Items}" SelectedItem="{Binding Path=SelectedItem}"> <ListView.View> <GridView > <GridViewColumn Header="Header1" DisplayMemberBinding="{Binding Path=Prop1}" /> <GridViewColumn Header="Header2" DisplayMemberBinding="{Binding Path=Prop2}"/> <GridViewColumn Header="Header3" DisplayMemberBinding="

问题 I'm trying to bind two points of a line to two Ellipses, which are inside ScatterViewItems. At the moment, I'm able to bind to ActualCenter.X and .Y for the ScatterViewItem, which works, but because the ellipse is not the only element in that ScatterViewItem (there is also a label), it's off-center, such that the line's endpoints are not the center of the ellipse. Ellipse doesn't have an ActualCenter property. I wanted to know whether I'm able to offset a property binding by a fixed amount,

问题 I want the following datagrid: Name questionpar1 | Name QuestionPar2 | Name QuestionPar3 | ... string qp1 of var1 | string qp2 of var1 | string qp3 of var1 | ... string qp1 of var2 | string qp2 of var2 | string qp3 of var2 | ... ... these are my classes: Question with property IEnumerable<Variation> Variations Variation with property IEnumerable<<keyValuePair<QuestionParameter,string>>> QuestionParameters QuestionParameter has the property Name which is a string Can Someone show me the code

问题 I got a class where I receive some collection structure: public class YIFY { private static List<Pelicula> resultados; public static void setResultados(List<Pelicula> resultados) { YIFY.resultados = resultados; } } Later, at another class I associate the contents of such List to a TableView . However I create an FXCollections.observableArrayList() which is set as the bind element to the table. This is how I do it: peliculas = FXCollections.observableArrayList(YIFY.getResultados());