如何检查BitmapImage实例是否被初始化？ WPF

Question

我尝试在圆圈中使用BitmapImage类的实例，但有时会收到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

有2工作时常用的事件位图，1次图像成功打开时发生，另一次发生图像失败;

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 
     }