binding

问题 I want to create a converter in which I will pass a type to find, in element's parent hierarchy & it should return true if such a type found, otherwise false. So far, I tried below given code & it is working. but now only i have issue is it finds element parent hierarchy until element's parent is null. I want to give ancestor level for finding element in parent hierarchy. So How can I give Ancestor Level to converter?? I used LayoutHelper.cs Class to find element in parent hierarchy as given

问题 i am trying to implement listbox (or listview): <ListView ItemsSource="{Binding Players}" SelectedIndex="{Binding SelectedIndex}"> My problem is, that i want to bind selected index to property in code-behind. It work only on form start, but i need to disable user to change selection. Selectin will be changed ONLY programmaticaly. Thanks for all advices or solutions :) 回答1: So, working solution: private void playersList_SelectionChanged(object sender, SelectionChangedEventArgs e) { if (sender

问题 I am trying to use KO templates to parse a JSON file (see here) into some pretty looking grid layouts.. (think similar to masonry/isotope layouts).. each template section will have different sized rectangles and squares inside it but the overall template conforms to a grid of 5 boxes wide by 3 boxes high (for example) Given this what i have been trying to do is detect the template, then iterate through each item, if its a certain index in the iteration load either the single, double, or

问题 I've got a DTO (bean) with ArrayList field: public MyDTO { ... private List<MyThing> things; ... ... getters, setters and so on } In my initBinder I have: @InitBinder public void initBinder(WebDataBinder binder) { ... binder.registerCustomEditor(List.class, "things", new PropertyEditorSupport() { @Override public void setAsText(String text) throws IllegalArgumentException { List<MyThing> things = new ArrayList<MyThings>; // fill things array with data from text ... // On that stage things

问题 Problem: The data I'm trying to display is essentially a collection of collections of some object. So the rows can be any number, normal for a datagrid, and the columns are also any number. That's not so normal for a datagrid. Usually you have a set number of columns and your rows vary. The datagrid cell will be either a string or a value changeable via a combobox. Attempted Solution: I tried adding columns to the datagrid dynamically, and while this worked just fine (adding them in

问题 i have created a wpf user control with a text box and a combo box. for accessing the text property of the text box i have used the below code public static readonly DependencyProperty TextBoxTextP = DependencyProperty.Register( "TextBoxText", typeof(string), typeof(TextBoxUnitConvertor)); public string TextBoxText { get { return txtValue.Text; } set { txtValue.Text = value; } } in another project i have used the control and bind the text as below: <textboxunitconvertor:TextBoxUnitConvertor

问题 Can't figure out why this timer isn't displaying information. Timer rigged to method to update TextBlock in TimeEntry. Binding doesn't seem to work, and I don't understand how to do it properly. I've looked at the MSDN sites. They only give out the basics: not enough. Code: TimeEntry.xaml.cs : public partial class TimeEntry : UserControl { public static readonly DependencyProperty timeSpentProperty = DependencyProperty.Register("timeSpent", typeof(TimeSpan), typeof(TimeEntry), new

问题 I have a strange problem with bindings on a custom control. I created a custom toolbar: public partial class TopToolbar { public static readonly BindableProperty BackCommandProperty = BindableProperty.Create(nameof(BackCommand), typeof(ICommand), typeof(TopToolbar), propertyChanged: BackCommandChanged); public ICommand BackCommand { get => (ICommand) GetValue(BackCommandProperty); set => SetValue(BackCommandProperty, value); } public TopToolbar() { InitializeComponent(); } // for debug

问题 I have a listbox of Students and the datatemplate for list item. The DataTemplate has a text block named tb. I want to set this textblock to be binded to Name property. How can I do it in xaml form outside? (Not from the datatemplate) <ListBox ItemsSource="{Binding l}" ItemTemplate="{Binding DataTemplate_L}" Margin="12,70,0,0"> </ListBox> Thank you 回答1: If I understand you correctly, you're asking how you set the databinding for the textblock, that is currently in your DataTemplate? You can't

问题 I'm trying to write grid of rectangles, wich does change color of its objects. private void Window_Loaded(object sender, RoutedEventArgs e) { for (int i = 0; i < size; i++) { main_grid.ColumnDefinitions.Add(new ColumnDefinition()); main_grid.RowDefinitions.Add(new RowDefinition()); } for (int i = 0; i < size; i++) { for (int j = 0; j < size; j++) { cells[i, j] = new Cell { state = false, col = false }; Rectangle rect = new Rectangle(); Grid.SetColumn(rect, j); Grid.SetRow(rect, i); rect.Fill