[英]c# ListView not updating when Property Changed
My UI is not updating when more data is added to the ObservableCollection. 将更多数据添加到ObservableCollection时,我的UI并未更新。 The console output says A first chance exception of type 'System.NullReferenceException' occurred.
控制台输出显示类型为'System.NullReferenceException'的第一次机会异常。 Should I be using Inotifycollectionchanged instead?
我应该改为使用Inotifycollectionchanged吗? Here is some of the code:
以下是一些代码:
<ListView x:Name="ListView2" ItemsSource="{Binding Source={x:Static d:GrabUserConversationModel._Conversation}, UpdateSourceTrigger=PropertyChanged}" SelectionChanged="ListView1_SelectionChanged">
UserConversationModel.cs UserConversationModel.cs
public class UserConversationModel : INotifyPropertyChanged
{
public UserConversationModel()
{
}
public string Name
{ get; set; }
public event PropertyChangedEventHandler PropertyChanged;
private void NotifyPropertyChanged(string Obj)
{
if (PropertyChanged != null)
{
this.PropertyChanged(this, new PropertyChangedEventArgs(Obj));
}
}
}
MainWindow.xaml.cs MainWindow.xaml.cs
public partial class MainWindow
{
static GrabUserConversationModel grabUserConversationModel;
public MainWindow()
{
InitializeComponent();
...
}
static void AddData()
{
grabUserConversationModel.Conversation.Add(new UserConversationModel { Name = "TestName" });
}
GrabUserConversationModel.cs GrabUserConversationModel.cs
class GrabUserConversationModel
{
public static ObservableCollection<UserConversationModel> _Conversation = new ObservableCollection<UserConversationModel>();
public ObservableCollection<UserConversationModel> Conversation
{
get { return _Conversation; }
set { _Conversation = value; }
}
...
your property ObservableCollection<UserConversationModel> Conversation
is not implementing the INotifyPropertyChanged
您的属性
ObservableCollection<UserConversationModel> Conversation
未实现INotifyPropertyChanged
public ObservableCollection<UserConversationModel> Conversation
{
get { return _Conversation; }
set { _Conversation = value; OnPropertyChanged("Conversation");}
}
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