如何检查BitmapImage实例是否已初始化？ WPF

Question

我尝试在圈子中使用BitmapImage类的实例，但有时我会收到BitmapImage未初始化的错误消息。如何在使用之前检查BitmapImage是否已初始化？

Answer 1

工作位图时常用2个事件，图像成功打开时发生1次火灾，图像失败时发生另一次火灾;

var myImage = new BitmapImage(new Uri(@"Images/img.jpeg",UriKind.Relative));
            myImage.ImageOpened += myImage_ImageOpened;
            myImage.ImageFailed += myImage_ImageFailed;


        void myImage_ImageFailed(object sender, ExceptionRoutedEventArgs e)
        {
            //handle failed event
        }

        void myImage_ImageOpened(object sender, RoutedEventArgs e)
        {
           //handle Image Opend OK event
        }