C＃位图图像-异常：参数无效

Question

I try to work with Image . It worked well but sometimes I got “Parameter is not valid” exception. I don't know why that problem occurs, please help me:

byte[] img = (byte[])PatientData.Rows[index - 1]["Anh"];
MemoryStream ms = new MemoryStream(img);
imgBox.Image.Dispose();
imgBox.Image = Image.FromStream(ms);
using (Bitmap abc = new Bitmap(imgBox.Image)) //Parameter is not valid (Sometimes)
{
    using (Image<Gray, byte> xyz = new Image<Gray, byte>(abc))
    {
        if(Global.xrayPic != null)
        {
            Global.xrayPic.Dispose();
            Global.xrayPic = xyz.Clone();
        }
    }
}

And when I checked it, I realize that the value of abc == null and it leads to this exception. How can I solve this situation?

Answer 1

The problem could be that the method

Image.FromStream(stream)

throws an ArgumentException on invalid picture data and null.