binding

问题 First of all, I am a complete Java NOOB. I want to handle multiple button presses with one function, and do certain things depending on which button was clicked. I am using Netbeans, and I added an event with a binding function. That function is sent an ActionEvent by default. How do I get the object that was clicked in order to trigger the binding function from within that function so I know which functionality to pursue? 回答1: The object that sent the event is the event source so evt

问题 I'm usually able to solve my problems with about five minutes of searching but this one has taken several days with no results, so I'll try posing the question. I have a Form whose DataContext is set to a datatable (would prefer LINQ to SQL but I am stuck w/ Sybase which lacks good support for modern entity frameworks.) I have a combo box sourced by another datatable that should update a column on the forms data table but I can't seem to get the binding for SelectedValue to work correctly. I

问题 I have a TextBox on my View, that has a Validation Rule: public class EmptyStringRule : ValidationRule { public override ValidationResult Validate(object value, System.Globalization.CultureInfo cultureInfo) { if(String.IsNullOrEmpty(value.ToString())) return new ValidationResult(true,"String Cannot be empty"); return new ValidationResult(true,null); } } When an empty string is entered. the bound property is not updated and the Textbox is marked red. I need to update the Source but still keep

问题 I am attempting to bind Image.Source in a DataTemplate to a System.Drawing.Image as discussed here: using XAML to bind to a System.Drawing.Image into a System.Windows.Image control <UserControl.Resources> <media:ImageConverter x:Key="imageConverter" /> <DataTemplate DataType="{x:Type data:GameTile}" > <StackPanel Orientation="Vertical" Margin="5" Background="Transparent"> <Viewbox> <TextBlock FontWeight="Bold" Text="{Binding PointValue}" TextAlignment="Center" FontSize="14" /> </Viewbox>

问题 When I add <TextBlock Text="{Binding SettingName}" TextWrapping="Wrap" Margin="10,-2,10,0" Style="{StaticResource PhoneTextSubtleStyle}" /> Everuthing is ok. But when <TextBlock x:Name="{Binding SettingTextBlockName}" Text="{Binding SettingName}" TextWrapping="Wrap" Margin="10,-2,10,0" Style="{StaticResource PhoneTextSubtleStyle}" /> constructor are breaking. But I need different names in all elements. 回答1: x:Name is a special property. As a matter of fact it's not a property at all, it's an

问题 This question already has answers here : Can you bind 'this' in an arrow function? (8 answers) Closed last year . I have this bit of code: const data = { x: "Target" } let bar = () => { console.log(this.x) } let final = bar.bind(data); final(); This code returns undefined. Here is the same code, but with non-arrow functions: const data = { x: "Target" } let bar = function(){ console.log(this.x) } let final = bar.bind(data); final(); This code works. I want to understand why the arrow function

问题 I'm trying to bind an extra argument opt to the following radiobuttons below. I'm trying to make it so that when WSRB_UD is triggered I can know which radiobutton triggered it. How do I go about this? Snippet: self.WS.SW.SearchFrame = [] self.WS.SW.SearchRB = [] self.WS.RBvar = Tkinter.IntVar() i = 0 while i < 6 : Frame = Tkinter.Frame(self.WS.SW.OptFrame, width=125, height=22, bd=1, bg=self.WSbg) Frame.grid(column=0, row=4 + i) Frame.grid_propagate(0) self.WS.SW.SearchFrame.append(Frame) RB

问题 I have a view-scoped bean that implements Serializable , and a UIComponent passed in via binding. @ManagedBean @ViewScoped public class ViewScopedBean implements Serializable { UIComponent form; /// ... } <h:form binding="#{viewScopedBean.form}"> ... The UIComponent is not serializable and thus breaking session restore. What's the best practice here? Should I just mark the UIComponents as transient ? Or is it bad practice to use binding= to anything but a request-scoped bean? I'm using

问题 I have this small sample in which I hoped to see log messages in browser console indicating $scope watcher is working well, but it's unfortunately not the case. <!doctype html> <html ng-app="demo"> <head> <script src="bower_components/angular/angular.js"></script> <script> var app = angular.module('demo', ['ng']); app.controller('demoCtrl', function($scope) { var self = this; self.searchText = ''; $scope.$watch('self.searchText', function(n, p) { console.log('searchText changed from', n, 'to'

问题 The following binding worked prior to 1.9: ko.bindingHandlers.accordion = { init: function(element, valueAccessor) { var options = valueAccessor() || {}; setTimeout(function() { $(element).accordion(options); }, 0); ko.utils.domNodeDisposal.addDisposeCallback(element, function(){ $(element).accordion("destroy"); }); }, update: function(element, valueAccessor) { var options = valueAccessor() || {}; $(element).accordion("destroy").accordion(options); } } But since 1.9, it no longer works, and