Question

我正在尝试使用XmlReader / XmlWriter类将BitmapImage写入/读取到Xml。在写出时，我可以在输出Xml文件中看到一个很好的长CDATA部分。在读入时我可以看到它确实在同一CDATA部分数据中读取。但重新创建BitmapImage的尝试失败了，错误...

"No imaging component suitable to complete this operation was found."

...在下面显示'image.StreamSource = stream'的行上......

Public Sub WriteXmlImage(ByVal writer As XmlWriter, ByVal image as BitmapImage)
  Using stream As New MemoryStream
    Dim encoder = New PngBitmapEncoder
      encoder.Frames.Add(BitmapFrame.Create(image))
      encoder.Save(stream)
      writer.WriteCData(Convert.ToBase64String(stream.ToArray()))
    End Using
End Sub

Public Function ReadXmlImage(ByVal reader As XmlReader) As BitmapImage
  Using stream As New IO.MemoryStream(Convert.FromBase64String(reader.Value))
    Dim image As New BitmapImage
    image.BeginInit()
    image.StreamSource = stream
    image.EndInit()
    return image
  End Using
End Sub

在测试中，我使用以下简单的代码来创建测试BitmapImage ...

Dim image As New BitmapImage(New Uri("c:\devil.png"))

有什么想法吗？

WPF写入/读取BitmapImage到XML失败，没有成像组件......＆＃39;错误

0 个答案: