binding

问题 I want to bind self events after Text widget class bindings, in order to change the text of the widget when my binding function is called. My binding, for example self.text.bind("<Key>", self.callback) , is called before the content in Text widget changes. 回答1: What is happening in your case is that your binding to print the value happens before the class binding, and it's the class binding that actually takes user input and puts it in the widget. There are several ways to solve this problem.

问题 I have a variable in my app.component.ts file that is passed in from a controller via my services.ts file. As far as I can see, the Object property passed to the Component via the Subject is working, because I can console.log(this.selectedContact.name) and It will log to the console perfectly, which would mean that it is correctly being stored into the variable selectedContact: any; . But I cannot seem to bind this to my HTML and I am curious as to what I may be missing. Here is my app

问题 I have a bindingSource in winforms as well as a controller class. I want to be able to set the selected record from within the controller class using 2 way binding. That is If the form is displaying and I set the SelectedPerson in the controller then the bindingSOurce should make that person the current record. My controller code is public class PeopleController : BaseController { private SortableBindingList<Person> _blvPersons; public SortableBindingList<Person> BlvPersons { get { return

问题 I've been trying to bind DataGridTextColumns column-wise to arrays (int[] I think) and have been unsuccessful. Nothing I've found on msdn, stackoverflow etc has been particularly helpful . <DataGrid AutoGenerateColumns="False" VerticalAlignment="Top" Margin="0,47,0,0" Height="351" Name="dataGrid1" IsReadOnly="True" CanUserAddRows="False" CanUserDeleteRows="False"> <DataGrid.Columns> <DataGridTextColumn Header="Slave Address" Width="100" Binding="{Binding SlaveAddressValues}"/>

问题 My C# app contains a Data Object like this: public class Data { public class a {get;set;} public class b {get;set;} } public class a { public int first {get;set;} } public class b { public int second{get;set;} } I initialize my data when the application starts and my data changes evey time the app is running. I have a dataGridView and I want to bind to the first property and to second property. The DataGrid contains two columns, that bound to first and to second property. How can I do this

问题 I am having a bit of trouble correctly binding my Datagrid ComboBox selected item to my PowerShell object. I am using a two way binding for the ComboBox with an 'UpdateSourceTrigger=PropertyChanged' parameter. The source objects correctly get added as items to the ComboBoxes and the source object will update as a selection is changed. However When I save the object or else launch for the first time, the selected items do not get bound. Instead all ComboBoxes are generated as having no

问题 I have a TableColumn coded as: <TableColumn text="Nom" prefWidth="${purchasesTable.width*0.65}"> <cellValueFactory> <PropertyValueFactory property="item.name" /> </cellValueFactory> </TableColumn> it's TableView 's items property is bound to a list of Purchase class: Purchase class: public class Purchase { private Item item; public Item getItem() { return item; } public void setItem(Item item) { this.item = item; } } My Item class is as follows: public class Item { private long id; private

问题 I would like to transform this button code into a template version and put it in a style xaml file: <Button Background="Transparent" BorderBrush="Transparent" HorizontalAlignment="Right" VerticalAlignment="Bottom" Margin="20" Foreground="White" Opacity="1"> <StackPanel Orientation="Horizontal"> <Rectangle Width="24" Height="24" Fill="{Binding RelativeSource={RelativeSource AncestorType=Button}, Path=Foreground}"> <Rectangle.OpacityMask> <VisualBrush Stretch="Fill" Visual="{iconPacks

问题 I'm attempting to convert the displayed value of a combobox by using its binding as a key to look for the value I would like to display. I can't seem to get it to work. The datacontext of my user control is MyObject. MyObject has a property "MasterDrawerId", which is the Id of "MyReferencedObject". Elsewhere in my application, accessible through a static property of my App.xaml.cs is a collection of "MyOtherObjects". "MyReferencedObject" has a foreign key relationship with the Id of

问题 I intend to change the state of several fields in a form (hide) according to the value selected in a combobox. This can be done using methods such as setVisible () or setHidden (). It will be possible to achieve this goal using binding component state? SOLVED Fiddle https://fiddle.sencha.com/#fiddle/1itf 回答1: Yes. Using ViewModel formulas. Quoting from the documentation: Many configs you will want to bind are boolean values, such as visible (or hidden), disabled, checked, and pressed. Bind