Question

我有一个binView绑定到类：

 <ListView x:Name="lvInfo" HorizontalAlignment="Left" Height="277" Margin="23,63,0,0" VerticalAlignment="Top" Width="750">
        <ListView.View>
            <GridView>
                <GridViewColumn Header="#" Width="20" DisplayMemberBinding="{Binding execNumber}"/>
                <GridViewColumn Header="Function" Width="120" DisplayMemberBinding="{Binding currentFunction}"/>
                <GridViewColumn Header="Message" Width="300"  DisplayMemberBinding="{Binding pcdMessage}"/>
                <GridViewColumn Header="Event Type" Width="75" DisplayMemberBinding="{Binding pcdEventType}"/>
                <GridViewColumn Header="Event" Width="150" DisplayMemberBinding="{Binding pcdEvent}"/>
                <GridViewColumn Header="Timing" Width="50" DisplayMemberBinding="{Binding strTime}"/>
            </GridView>
        </ListView.View>
    </ListView>

在Codebehind中，类是

private class PcdStatus
    {
        public PcdStatus(int _execNumber, String _currentFunction, String _pcdMessage, Helper.ePcdEventType _pcdEventType, Helper.ePcdEvent _pcdEvent,String _strTime )
        {
            execNumber = _execNumber;
            currentFunction = _currentFunction;
            pcdMessage = _pcdMessage;
            pcdEventType = _pcdEventType;
            pcdEvent = _pcdEvent;
            strTime = _strTime;
        }
        public int execNumber { get; set; }
        public String currentFunction { get; set; }
        public String pcdMessage { get; set; }
        public Helper.ePcdEventType pcdEventType { get; set; }
        public Helper.ePcdEvent pcdEvent { get; set; }
        public String strTime { get; set; }
    }

通过事件更新课程：

private void MyPcd_OnStatusChange(string _currentFunction, string _PCDMessage, Helper.ePcdEventType _pcdEventType, Helper.ePcdEvent _pcdEvent)
    {
        String strTime;
        if (lastTime == default(DateTime))       
            strTime = "---";
        else
        {
            TimeSpan ts = DateTime.Now - lastTime;
            strTime = ts.TotalSeconds.ToString("0.000")+ "\"";
        }
        lastTime = DateTime.Now;

        PcdStatus newStatus = new PcdStatus(execNumber, _currentFunction, _PCDMessage, _pcdEventType, _pcdEvent, strTime);
        Application.Current.Dispatcher.BeginInvoke(new Action(() => this.ocList.Add(newStatus)));
        //ocList.Add(newStatus);           
    }

类更新已正确完成但不是实时完成。我添加了一个console.Beep（），当从库中触发事件时，它会发出警告。来自图书馆的事件---＆gt; My_PcdOnStatusChange ---＆gt; ocList.Add ---＆gt; listView已更新。我期望每次发出蜂鸣声更新，但listView仅在所有s / r结束时更新。

编辑抱歉忘了提及下面的ocList代表：

 ObservableCollection<PcdStatus> ocList = new ObservableCollection<PcdStatus>();

EDIT2 我很确定问题不依赖于ListView或绑定本身。我添加了一个更改图片的属性。程序启动时为红色，空闲时为绿色。

  private bool _isBusy;
    public bool IsBusy
    {
        get { return _isBusy; }
        set
        {
            _isBusy = value;               
            if (value)
                imgBusy.Dispatcher.Invoke(new Action(() => imgBusy.Source = new BitmapImage(new Uri(@"../../Resources/redBall.png", UriKind.Relative))));
            else
                imgBusy.Dispatcher.Invoke(new Action(() => imgBusy.Source = new BitmapImage(new Uri(@"../../Resources/greenBall.png", UriKind.Relative))));
        }
    }

预期的行为是：

idle --> green
started ---> red
terminated ---> green

虽然它的行为是：

idle ---> green
started --->green
midway ---> red
terminated --->green.

我是Winform的WPF新手，有一个Mainform.Update。这里有类似的东西吗？

Thanx任何帮助帕特里克

Answer 1

您需要将ItemSource属性绑定到实现INotifyCollectionChanged

的集合

最简单的是ObservableCollection

如果您想要更新属性更改

，PcdStatus也应该实现INotifyPropertyChanged

C＃WPF listView在添加时不能实时更新

1 个答案: