在我的应用程序中，我有rcvid=MsgReceive(chid, (void*)&message, sizeof(message),NULL);以下列方式打开：
view这是ManagerView view = new ManagerView();
view.ShowDialog();
：
View
和我的<Window x:Class="WpfUpdateGui.ManagerView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
xmlns:local="clr-namespace:WpfUpdateGui">
<Window.DataContext>
<local:ManagerViewModel />
</Window.DataContext>
<i:Interaction.Triggers>
<i:EventTrigger EventName="ContentRendered">
<i:InvokeCommandAction Command="{Binding LoadedCommand}" />
</i:EventTrigger>
</i:Interaction.Triggers>
<TextBox Text="{Binding Messages}" />
：
ViewModel我的问题是，我想显示的第一条消息（“正在开始”）仅在设置public class ManagerViewModel : INotifyPropertyChanged
{
/*INPC Members...*/
private string _messages;
private static EventWaitHandle _timerWaiter;
/*Constructor*/
public ManagerViewModel()
{
_timerWaiter = new EventWaitHandle(false, EventResetMode.AutoReset);
LoadedCommand = new RelayCommand(StartProcess);
}
private void StartProcess()
{
Application.Current.Dispatcher.Invoke(
DispatcherPriority.ApplicationIdle,
new Action(() =>
{
AddMessage("Starting");
Worker worker = new Worker();
worker.DidSomethingEvent += Worker_DidSomethingEvent;
worker.DoSomeThing();
_timerWaiter.WaitOne();
AddMessage("Finished");
}));
}
private void AddMessage(string message)
{
Application.Current.Dispatcher.Invoke(() => Messages += $"\r\n{message}");
}
private void Worker_DidSomethingEvent()
{
_timerWaiter.Set();
}
public RelayCommand LoadedCommand { get; set; }
public string Messages
{
get { return _messages; }
set
{
if (value == Messages) return;
_messages = value;
OnPropertyChanged("Messages");
}
}
}
public class Worker
{
public event Action DidSomethingEvent;
public void DoSomeThing()
{
Thread.Sleep(2500);
DidSomethingEvent();
}
}
后显示，即使在EventWaitHandle电话之前添加也很难。
答案 0 :(得分：0)
只需将ContentRendered替换为Loaded事件即可。 （它确实与我合作）。