本文实例讲述了asp.net实现上传图片时判断图片的模式RGB或CMYK的方法。

Bitmap bmp = new Bitmap(allow_fileStream); //文件路径

allowUpload = stringHelper.IsCMYK(bmp) == "true" ? false : true; //返回true字符串则图片不是RGB模式的

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();

}