wpf - WPF:这种类型的CollectionView不支持更改错误

Question

所以我有WPF应用程序，我想添加Logger form。

所以我创建了另一个form:

public partial class LoggerForm : MetroWindow
{
    public LoggerForm()
    {
        InitializeComponent();
        DataContext = LogHelper.LogEntries;
        lvLogger.ItemsSource = LogHelper.LogEntries;
    }

    public void AddRandomEntry(LogEntry logEntry)
    {
        Dispatcher.BeginInvoke((Action)(() => LogHelper.LogEntries.Add(logEntry)));
    }
}

XAML ListView:

<ListView Name="lvLogger"
          Background="#181818"
          Margin="0,0,0,0">
<ListView.View>
        <GridView>
            <GridViewColumn Width="Auto" Header="Time" DisplayMemberBinding="{Binding DateTime}"/>
            <GridViewColumn Width="Auto" Header="Index" DisplayMemberBinding="{Binding Index}"/>
            <GridViewColumn Width="Auto" Header="Level" DisplayMemberBinding="{Binding Level}"/>
            <GridViewColumn Width="Auto" Header="Source" DisplayMemberBinding="{Binding Source}"/>
            <GridViewColumn Width="Auto" Header="Message" DisplayMemberBinding="{Binding Message}"/>
        </GridView>
    </ListView.View>
</ListView>

日志 object:

public class LogEntry
{
    public string DateTime { get; set; }

    public int Index { get; set; }

    public string Source{ get; set; }

    public Level Level { get; set; }        

    public string Message { get; set; }
}

列表:

public class LogHelper
{
    public static ObservableCollection<LogEntry> LogEntries { get; set; }
}

因此，这就是我将日志添加到列表中的方式:

打开我的记录仪 form:

Thread newWindowThread = new Thread(new ThreadStart(() =>
{
    // Create and show the Window
    loggerForm = new LoggerForm();
    loggerForm.Show();

    // Start the Dispatcher Processing
    Dispatcher.Run();
}));

// Set the apartment state.
newWindowThread.SetApartmentState(ApartmentState.STA);
newWindowThread.IsBackground = true;
newWindowThread.Start();

然后从我的主要 form创建 LogEntry对象，然后将其添加:

private void AddLog(Level level, string message)
{
    if (loggerForm != null)
    {
        LogEntry logEntry = new LogEntry()
        {
            DateTime = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss,fff"),
            Index = LogHelper.LogEntries.Count,
            Level = level,
            Source = "bla bla",
            Message = message
        };

        loggerForm.AddRandomEntry(logEntry);
    }
}

因此，在我关闭 Logger表单并再次将其打开之前，它可以正常工作。在这一点上，如果我添加另一个 LogEntry，我在 error方法中有这个 AddRandomEntry:

System.NotSupportedException: 'This type of CollectionView does not support changes to its SourceCollection from a thread different from the Dispatcher thread.'

Answer 1

您的问题是由于您使用了单独的线程。我的建议是根本不要启动您的新线程。

Thread newWindowThread = new Thread(new ThreadStart(() =>

和

newWindowThread.SetApartmentState(ApartmentState.STA);
newWindowThread.IsBackground = true;
newWindowThread.Start();

都不好
不要这样
为UI拥有多个线程几乎从来不是一个好主意。