var sert = db.T_GrowData.Where(e => e.dateSubmit == bitdata.dateSubmit && e.status == 1).FirstOrDefault().value;
Bitmap one = new Bitmap(sert); //报错:参数无效
图片到byte[]再到base64string的转换: Bitmap bmp = new Bitmap(filepath); MemoryStream ms = new MemoryStream(); bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Gif); byte[] arr = new byte[ms.Length...