inotifypropertychanged

问题 Have a bunch of ObservableCollection<MeClass> Result and require to combine them all into another ObservableCollection<MeClass> AllResults so I can display it in a listview . Just not sure how to combine them all in one. I Created a new class to combine them all but not sure how they will get updated after I got the list once... So not really sure which direction to take. I know about INotifyPropertyChanged I'm just not sure how to combine them all and keep updating as everything changes. 回答1

问题 Admittedly I am new to wpf. But i have spent some time Googling about it all and I am stumped. in essence i want to update my TextBlock in my UI using Binding whenever my Model values change. So this is my Model: using System.ComponentModel; using System.Runtime.CompilerServices; namespace WpfApplication1 { public class MyModel : INotifyPropertyChanged { protected void OnPropertyChanged([CallerMemberName] string propertyName = null) { this.PropertyChanged?.Invoke(this, new

问题 Hopefully someone can help me out with this. I am creating a Silverlight app which is used for editing images. A user has a project which contain layers which contain elements. (Elements are text and image elements). I have a class which represents the project. It contains an ObservableCollection and each Layer has an ObservableCollection. Element is an abstract class. There is a TextElement and ImageElement class which inherit from Element. My problem is the UI never gets updated when I

问题 I just implemented my business logic validation according to Rachel Lim's blog. Everything was running great until I decided to put a trigger in my view bound to the IsValid property like this: <ListBox ItemsSource="{Binding EdgedBoards}" SelectedItem="{Binding SelEdgedBoard, Mode=TwoWay}" DisplayMemberPath="Name"> <ListBox.ItemContainerStyle> <Style TargetType="{x:Type ListBoxItem}" BasedOn="{StaticResource {x:Type ListBoxItem}}"> <Setter Property="Focusable" Value="True" /> <Style.Triggers>

问题 So I have a TreeView that has heirarchical data templates that have CheckBoxes in the lowest layer. These CheckBoxes are bound to a "isChecked" boolean value in the ViewModel. What I have been attempting to do is load the various variables indicating to me which checkboxes to check, change the boolean isChecked in the model to true, therefore resulting in the specific CheckBoxes in the TreeView being update visually. Here is my code for reference: XAML: (of TreeView I am working with)

问题 I want to pull data from a database to display into a ComboBox, and then allow users to select values from that ComboBox and add them into a ListBox (via add/remove buttons). Would I be able to get away with using an ObservableCollections to hold the database values to bind to the ComboBox, since it implements INotifyPropertyChanged (and CollectionChanged )? Sorry if this is a basic question, I starting learning WPF about a month ago. I've read over the article (very well done) by Sacha

问题 I have a datagridview that I am binding to a class. I add to the class but the datagridview is not updating. My bind: ScannedChecks = new ScannedChecks(); ScannedChecks.AddCheck(DateTime.Now, "22222", "checknumdd", "routingdd", _checkData, 4); dataGridView1.DataSource = ScannedChecks; I went ahead and did the AddCheck to see if it was reaching the datagridview and it isn't... The class is being updated though. My class: namespace SSS.Ckentry { public class ScannedChecks :

问题 I am using MVVM light in WPF. The Model class properties are constantly changed due to changes of the underlying data-access layer. Model: public class SBE_V1_Model : ViewModelBase { public SBE_V1_Model(String name) { Name = "MAIN." + name; SetupClient(); } private void SetupClient() { client = new ConnectionHelper(this); client.Connect(Name); } public Boolean Output { get { return _Output; } set { if (value != this._Output) { Boolean oldValue = _Output; _Output = value; RaisePropertyChanged(

问题 For example class child : ObservableObject{ private int _prop; public int prop{ get { return _prop; } set { _prop=value; OnPropertyChanged("prop"); } } class parent : ObservableObject{ private child _mychild; public child mychild{ get { return _mychild; } set { _mychild=value; OnPropertyChanged("mychild"); OnPropertyChanged("pow"); } } public int pow{ return _mychild.prop*2; } } parent myobj; myobj.child.prop=1; How do I get notified that bar.z is updated? I have binded the nested property

问题 I have a class that contains two other objects. A variable in the first object bind to WPF element, call it X . A similar variable in the other object. I want that when the PropertyChanged event happens, it will change the variable in the second object. Here is the code that does not work for me: The class that contains the variables: (I had register to property changed event) private Class1 _var1; public Class1 Var1 { get { return _var1; } set { _var1= value; if (_var1!= null) _var1