wpf mvvm threading.Timer和TimerCallback问题 [英] wpf mvvm threading.Timer and TimerCallback problems

问题描述

我有一个针对MVVM框架开发的WPF应用程序，其中ViewModel构造函数设置一个TimerCallback的定时器。

I have a WPF application developed against the MVVM framework in which the ViewModel constructor set a Timer with a TimerCallback.

TimerCallback检索一个ObservableCollection，字段。

The TimerCallback retrieves an ObservableCollection and passes it to a field on the VM.

我有一个CollectionViewSource，其Source属性设置为ObservableCollection。我使用一个CollectionViewSource，因为我想对集合启用过滤。

I have a CollectionViewSource which has its Source property set to the ObservableCollection. I am using a CollectionViewSource because I want to enable filtering on the Collection.

我发现当TimerCallback尝试将ObservableCollection传递到本地字段Source属性CollectionViewSource有一个异常{调用线程不能访问此对象，因为不同的线程拥有它。}。

I have found that when the TimerCallback attempts to pass the ObservableCollection into the local field the Source property for the CollectionViewSource has an exception {"The calling thread cannot access this object because a different thread owns it."}.

我理解异常，但我有两个问题： / p>

I understand the exception but I have two problems:

1. 如何解决这个问题？


2. 更重要的是，使用CollectionViewSource？如果我删除CollectionViewSource并使得ObservableCollection是一个公共属性，那么我没有这样的异常。

任何帮助谢谢！谢谢，
Drammy

Any help appreciated! Thanks, Drammy

推荐答案

1. 使用 DispatcherTimer <


2. 可能只需要一个 ObservableCollection code>您的UI未更新。



1. Use the DispatcherTimer instead of the timer class you are using now, and make sure you create it on the UI thread.
2. Probably with just an ObservableCollection your UI is not updated.

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