inotifypropertychanged

问题 In my ViewModel I have two properties type of Datetime. They are bound in XAML with TwoWay mode. When I update each of them - OnPropertyChanged raises in set part of this Datetime property for the third property. So I want to update the third property only once when I update two Datetime properties at the same time, instead of updating third property twice. How it can be archieved? Code applied: //1 public DateTime StartDate { ... set { this.selectedEndDate = value; this.OnPropertyChanged(

问题 I'm yet again a bit stumped, and was hoping someone could please help. Apologies in advance to the long code. Issue - I have a DataTrigger that starts off firing as expected, but it eventually fails and I can't work out why. In the example provided, it moves a rectangle around a Canvas. Each click of the button moves it in this sequence; N, NE, E, SE, S, SW, W, NW. Then it starts the sequence again, starting with N. Once the first sequence is completed, it won't move North. It will only ever

问题 While investigating on a seemingly unrelated issue, I've hit some unexpected binding behaviour. Having class StringRecord : INotifyPropertyChanged { public string Key {get; set; } // real INPC implementation is omitted public string Value { get; set; } // real INPC implementation is omitted ... } class Container { public ObservableKeyedCollection<string, StringRecord> Params { get; set; } ... { Now, when a TextBox is bound to one of the collection items in obvious way <TextBox Text="{Binding

问题 I'm binding to properties from XAML in a WPF application, but this query is about raising 'PropertyChanged' events on one class property when another is raised in a different class/object. One use case is where a combobox ItemsSource binds to a property (PropB in my simplified example below) and that property returns a collection based on other properties (PropA below). PropB in class B needs to raise PropertyChanged when PropA in class A changes, but class A does not reference class B. Is

问题 In my project I wanna change the background of a Datagrid cell whenever a new Bid price comes in. And I set it using public class Notifier : INotifyPropertyChanged { public bool BidUp { get { return _bidUp; } set { _bidUp = value; OnPropertyChanged("BidUp"); } } public double Bid { get { return _bid; } set { BidUp = (value > this.Bid); _bid = value; OnPropertyChanged("Bid"); } } public event PropertyChangedEventHandler PropertyChanged; protected void OnPropertyChanged(string propertyName) {

问题 Hi, I'm struggling a bit using the ListBox.DataSource and the INotifyPropertyChanged Interface. I checked several posts about this issue already but I cannot figure out, how to update the view of a ListBox if an element of the bound BindingList is changed. I basically want to change the color of an IndexItem after the content has been parsed. Here the relevant calls in my form: btn_indexAddItem.Click += new EventHandler(btn_indexAddItem_Click); lst_index.DataSource = Indexer.Items; lst_index

问题 Does anyone know if the INotifyPropertyChanged interface can be implemented on an object in Powershell natively, without building a C# class and using Add-Type to generate a new .NET assembly? I've Googled everything I can think of and haven't been able to find a solution. Thanks. 回答1: No. Consider PowerShell a CLI consumer language and not so much a producer language. That is you can construct and use most .NET types. However PowerShell doesn't natively provide a facility to create new .NET

问题 I'm trying to achieve two-way binding between a DataGridView and a BindingList that provides data for the DGV. Some columns do not yet reflect changes in the underlying list and I think it's because I have not provided property setter(s) to notify of property changes. Rather than code the setter for the Rows property the same way I did for the Process property, I'm trying to get more "elegant" and I realize I am stuck.... I stumbled upon a very interesting writeup for a more elegant approach

问题 Good morning. I have a class with data derived from InotifyPropertyChange. The data come from a background thread, which searches for files with certain extension in certain locations. Public property of the class reacts to an event OnPropertyChange by updating data in a separate thread. Besides, there are described in XAML TreeView, based on HierarhicalDataTemplates. Each TextBlock inside templates supplied ItemsSource = "{Binding FoundFilePaths, Mode = OneWay, NotifyOnTargetUpdated = True}"

问题 I have a data grid and one main checkbox. When I check changed in the main checkbox, this will affect all checkbox that inside data grid; I just do it programmatically. My so-called ViewModel : foreach (TimeSheetModel value in TimeSheetList.Intersect(selectedlist)) { if (!chkmain.IsChecked.GetValueOrDefault()) { value.IsApproved = false; } else { value.IsApproved = true; } } This is my TimeSheetModel : public class TimeSheetModel:BaseModel, ICloneable { bool _IsApproved; public bool