c# - 反序列化错误：参数无效

Question

我能够将形状序列化为对象并再次加载它或将其重新绘制到图片框中。现在的问题是我可以将图像序列化为 Base64String 但我无法再次将其反序列化为 Image 并在 PictureBox 中重绘。有什么建议么？

我提供了关于序列化和反序列化的代码。我排除了再次绘制形状的那个，因为它与问题无关。

序列化方法

public void Serialization()
    {
        try
        {
            XmlSerializer ser = new XmlSerializer(typeof(List<Layers>)); //Serializer
            SaveFileDialog save = new SaveFileDialog();           //Creates and Opens a SaveFileDialog
            save.Filter = "Seal Creator File (*.sealFile)|*.sealFile";     //Creates a filter fir saving the Project File
            save.DefaultExt = ".seal";
            save.AddExtension = true;

            if (save.ShowDialog() == DialogResult.OK)
            {
                //Serialization process for the Class
                FileStream file = File.Create(save.FileName);
                ser.Serialize(file, draw.layers);
                file.Close();
                MessageBox.Show("Saved"); //Saving Confirmation
            }
        }
        catch (Exception ex)
        {
            //Catching the Error
            String innerMessage = (ex.InnerException != null) ? ex.InnerException.Message : "";
            Debug.WriteLine(innerMessage);
        }
    }

反序列化

public void Deserialize(StreamReader file)
    {
        try
        {
            List<Layers> _layers = new List<Layers>();      
            XmlSerializer ser = new XmlSerializer(typeof(List<Layers>));   
            _layers = (List<Layers>)ser.Deserialize(file);   //Here's where the program catches an error. 
        }
    }      

这就是我在图层类中序列化和反序列化图像的方式

 [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
    [XmlElement("ImageData")]
    public String ImageData
    {
        get
        {
            //Serialize
            using (MemoryStream ms = new MemoryStream())
            {
                // Convert Image to byte[]
                image.Save(ms, ImageFormat.Bmp);
                byte[] imageBytes = ms.ToArray();

                // Convert byte[] to Base64 String
                string base64String = Convert.ToBase64String(imageBytes);
                return base64String;
            }
        }
        set
        {
            //Deserialize
            byte[] imageBytes = Convert.FromBase64String(ImageData);
            MemoryStream ms = new MemoryStream(imageBytes, 0,
              imageBytes.Length);

            // Convert byte[] to Image
            ms.Write(imageBytes, 0, imageBytes.Length);
            Image image = Image.FromStream(ms, true);
            this.image = (Bitmap)image;
        }
    }

错误：参数无效。

编辑

图层类

    public enum Type
    {
       Rectangle, Square, Circle, Ellipse, Triangle, Image
    }
    public Layers.Type type { get; set; }
    public float width { get; set; }
    public float height { get; set; }
    public PointF location { get; set;}
    public int radius { get; set; }
    public int strokeThickness { get; set; }
    public Color color { get; set; }
    public Bitmap image { get; set; }

    [XmlElement("ImageData")]
    public String ImageData
    {
        get
        {
            //Serialize
            using (MemoryStream ms = new MemoryStream())
            {
                // Convert Image to byte[]
                image.Save(ms, ImageFormat.Bmp);
                byte[] imageBytes = ms.ToArray();

                // Convert byte[] to Base64 String
                string base64String = Convert.ToBase64String(imageBytes);
                return base64String;
            }
        }
        set
        {
            //Deserialize
            byte[] imageBytes = Convert.FromBase64String(ImageData);
            MemoryStream ms = new MemoryStream(imageBytes, 0,
              imageBytes.Length);

            // Convert byte[] to Image
            ms.Write(imageBytes, 0, imageBytes.Length);
            Image image = Image.FromStream(ms, true);
            this.image = (Bitmap)image;
        }
    }
    public RectangleF rect { get; set; }
    public PointF centerSerializable
    {
        get { return Shape.center; }
        set { Shape.center = value; }
    }

    public Layers(Layers.Type image, RectangleF rect, Bitmap bm)
    {
        this.type = image;
        this.rect = rect;
        this.image = bm;
    }
    public Layers (Layers.Type shape, float width, float height, int radius, int strokeThickness, Color color, PointF location)
    {
        this.type = shape;
        this.width = width;
        this.height = height;
        this.radius = radius;
        this.strokeThickness = strokeThickness;
        this.color = color;
        this.location = location;
    }
    public Layers()
    {

    }
}

}

标签： c#xmldeserialization