我有一个线程调用一个从Internet获取一些东西的对象.当此对象填满所需的所有信息时,它会引发一个具有对象的事件将所有信息.该事件由启动该线程的控制器使用.
然后将事件中返回的对象添加到通过View Model方法绑定到GUI的集合中.
问题是我不能将CheckAccess与绑定一起使用…如何解决使用从主要的其他线程创建的Object的问题？
This type of CollectionView does not support changes to its SourceCollection from a thread different from the Dispatcher thread.
这个控制器：
public class WebPingerController
{
private IAllQueriesviewmodel queriesviewmodel;
private PingerConfiguration configuration;
private Pinger ping;
private Thread threadPing;
public WebPingerController(PingerConfiguration configuration,IAllQueriesviewmodel queriesviewmodel)
{
this.queriesviewmodel = queriesviewmodel;
this.configuration = configuration;
this.ping = new Pinger(configuration.UrlToPing);
this.ping.EventPingDone += new delPingerDone(ping_EventPingDone);
this.threadPing = new Thread(new ThreadStart(this.ThreadedStart));
}
void ping_EventPingDone(object sender,QueryStatisticInformation info)
{
queriesviewmodel.AddQuery(info);//ERROR HAPPEN HERE
}
public void Start()
{
this.threadPing.Start();
}
public void Stop()
{
try
{
this.threadPing.Abort();
}
catch (Exception e)
{
}
}
private void ThreadedStart()
{
while (this.threadPing.IsAlive)
{
this.ping.Ping();
Thread.Sleep(this.configuration.TimeBetweenPing);
}
}
}
解决方法
我找到了这个
blog的解决方案.
queriesviewmodel.AddQuery(info);
我必须将主线程传递给控制器并使用调度程序.警卫的答案非常接近.
public delegate void MethodInvoker();
void ping_EventPingDone(object sender,QueryStatisticInformation info)
{
if (UIThread != null)
{
Dispatcher.FromThread(UIThread).Invoke((MethodInvoker)delegate
{
queriesviewmodel.AddQuery(info);
},null);
}
else
{
queriesviewmodel.AddQuery(info);
}
}
