创建BitmapImage会抛出丢失的键异常 [英] Creating BitmapImage throws missing key exception

问题描述

我有一个视图，显示带有标题和注释的图像。
当我加载现有的图像时，我使用这个代码：

I have a view that displays an image with it's title and comment alongside it. When I load up existing images I utilize this code:

        this.ArtifactIdentity = image.ArtifactIdentity;
        this.Comment = image.Comment;
        this.Name = image.Name;
        this.MediaIdentity = image.MediaIdentity;
        this.ImageArray = image.Image;
        Image = new BitmapImage();
        Image.BeginInit();
        Image.CacheOption = BitmapCacheOption.None;
        Image.CreateOptions = BitmapCreateOptions.IgnoreImageCache;
        Image.StreamSource = new MemoryStream(this.ImageArray);
        Image.EndInit();

当我执行EndInit（）时抛出异常缺少参数键。堆栈跟踪显示以下内容：System.Collections.Hashtable.ContainsKey（Object key）
在System.Collections中的堆栈跟踪显示：

When I execute the EndInit() it throw the exception missing parameter key. The stack trace shows this:

  at System.Collections.Hashtable.ContainsKey(Object key)
  at System.Collections.Hashtable.Contains(Object key)
  at System.Windows.Media.Imaging.ImagingCache.RemoveFromCache(Uri uri, Hashtable table)
  at System.Windows.Media.Imaging.BitmapImage.FinalizeCreation()
  at System.Windows.Media.Imaging.BitmapImage.EndInit()

我为什么我得到这个异常，当我使用代码我见过许多其他使用成功，但我得到这个异常？

So can anyone tell me why I am getting this exception when I am using code I've seen many others use with success and yet I get this exception??? I'm at a loss!

推荐答案

这是由WPF中的一个错误，在 BitmapImage中引起的。 FinalizeCreation（）：

This is caused by a bug in WPF, in BitmapImage.FinalizeCreation():

if ((CreateOptions & BitmapCreateOptions.IgnoreImageCache) != 0)
{
    ImagingCache.RemoveFromImageCache(uri); 
}

如果指定 IgnoreImageCache ，但不能从URI加载，它会破坏。

If you specify IgnoreImageCache, but don't load from a URI, it breaks.

只是摆脱那个标志;它只适用于从网址载入时。

Just get rid of that flag; it only applies when loading from URLs.

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