asp. net Method for judging picture mode GRB or CMYK when uploading pictures

In this paper, the method of judging the mode of GRB or CMYK when uploading pictures by asp. net is described. Share it for your reference, as follows:

Bitmap bmp = new Bitmap(allow_fileStream); // File path 
allowUpload = stringHelper.IsCMYK(bmp) == "true" ? false : true; // Return true String, the picture is not RGB Pattern 
public string IsCMYK(System.Drawing.Image img)
{
    string isCmyk;
    if ((GetImageFlags(img).IndexOf("Ycck") > -1) || (GetImageFlags(img).IndexOf("Cmyk") > -1))
    {
      isCmyk = "true";
    }
    else
    {
      isCmyk = "false";
    }
    return isCmyk;
}
public string GetImageFlags(System.Drawing.Image img)
{
    ImageFlags FlagVals = (ImageFlags)Enum.Parse(typeof(ImageFlags), img.Flags.ToString());
    return FlagVals.ToString();
}

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