C# : public observablecollection instance pass items to protected observablecollection

Question

我有以下类(class)，效果很好

public class RemoteSource {
    ObservableCollection<RemoteDataViewModel> remote;
    string[] _servers = new string[] {
        "server",
        "server",
        "server",
        "server",
        "server"
    };
    public RemoteSource() {
        remote = CreateDataSource();
    }
    protected ObservableCollection<RemoteDataViewModel> CreateDataSource() {
        ObservableCollection<RemoteDataViewModel> res = new ObservableCollection<RemoteDataViewModel>();
        ITerminalServicesManager _manager = new TerminalServicesManager();
        foreach (var host in _servers) {
            using (ITerminalServer srv = _manager.GetRemoteServer(host)) {
                try {
                    srv.Open();
                    foreach (ITerminalServicesSession session in srv.GetSessions()) {
                        res.Add(new RemoteDataViewModel() { Server = srv.ServerName, SessionID = session.SessionId, UserID = session.UserName, State = session.ConnectionState, ConnectedTime = session.ConnectTime, LogonTime = session.LoginTime, IdleTime = session.IdleTime, UserIP = session.ClientIPAddress, Workstation = session.WindowStationName });
                    }
                    srv.Close();
                }
                catch (Win32Exception) { }
                catch (SystemException) { }
                catch (Exception) { }
            }
        }
        return res;
    }
    /// <summary>
    /// Gets the data.
    /// </summary>
    /// <value>
    /// The data.
    /// </value>
    public ObservableCollection<RemoteDataViewModel> Data { get { return remote; } }
    public ObservableCollection<string> hosts { get; set; }
}

RemoteSource 已设置，但按钮事件执行以下操作

DataContext = new RemoteSource();

我想通读一个文本文件，其中包含这样的服务器名称列表

Server1
Server2
Server3
etc

并将它们加载到 ObservableCollection 中然后能够做我目前在这条线上做的同样的事情

foreach (var host in _servers) # but where _servers is the observablecollection initiated from the button event

我试图在按钮事件下做这样的事情，但 rs.hosts 总是返回为 null

RemoteSource rs = new RemoteSource();
rs.hosts.Add(Environment.MachineName);

Answer 1

您的 ObservableCollection<T>应该是您的 ViewModel 的属性。然后，在 View 中，绑定(bind)一些 ItemsControl.ItemsSource属性(property)给它。

例如( super 简化):

public class SessionViewModel : INotifyPropertyChanged
{
    // ...

    public ObservableCollection<String> ServerList { get; set; }
}

在 View 中

<ListView x:Name="ServerList" ItemsSource="{Binding ServerList}"/>