WPF跨线程对象访问 [英] WPF Cross Thread Object Access

问题描述

我有一个问题关于WPF中跨线程调用。

I have an issue regarding cross thread calls in WPF.

            foreach (RadioButton r in StatusButtonList)
        {
            StatusType status = null;
            r.Dispatcher.Invoke(new ThreadStart(() => status= ((StatusButtonProperties)r.Tag).StatusInformation));
            if (AppLogic.CurrentStatus == null || AppLogic.CurrentStatus.IsStatusNextLogical(status.Code))
            {
                SolidColorBrush green = new SolidColorBrush(Color.FromRgb(102, 255, 102));
                r.Dispatcher.Invoke(new ThreadStart(() =>  r.Background = green));
            }
            else
            {
                SolidColorBrush red = new SolidColorBrush(Color.FromRgb(255, 0, 0));
                r.Dispatcher.Invoke(new ThreadStart(() => r.Background = red));
            }
        }

当我运行此code，它可以正确处理第一次迭代。然而，第二次迭代中的行：

When I run this code, it works correctly for the first iteration. However during the second iteration the line:

  r.Dispatcher.Invoke(new ThreadStart(() => status= ((StatusButtonProperties)r.Tag).StatusInformation))

导致此异常：

Cannot use a DependencyObject that belongs to a different thread than its parent Freezable.

我已经尝试了一些解决方案，但我找不到任何可行的。

I've tried a few solutions but I can't find anything workable.

任何帮助AP preciated！

Any help appreciated!

推荐答案

我想改写这个为：

r.Dispatcher.Invoke(new Action(delegate()
{
    status = ((StatusButtonProperties)r.Tag).StatusInformation;

    if (AppLogic.CurrentStatus == null || AppLogic.CurrentStatus.IsStatusNextLogical(status.Code))
    {
        r.Background = Brushes.Green;
    }
    else
    {
        r.Background = Brushes.Red;
    }

}));

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