public static string SaveFileForBase64(string file, string fileName) { string result = ""; try { string directory = HttpRuntime.AppDomainAppPath.ToString(); string path = "/Upload"; byte[] content = Convert.FromBase64String(file.Substring(file.IndexOf("base64,") + 7));//切除前面那段image标识 string extension = Path.GetExtension(fileName); CreateCatalog(directory, path); path = string.Format("{0}/{1}", path, DateTime.Now.ToString("yyyyMMdd")); CreateCatalog(directory, path); path = string.Format("{0}/{1}{2}{3}", path, DateTime.Now.ToString("yyyyMMddHHmmssfff"), new Random(GetRandomSeed()).Next(1, 1000), extension); using (MemoryStream ms = new MemoryStream(content)) { Bitmap bm = new Bitmap(ms); bm.Save(directory + path.Replace("/", "\\")); } if (File.Exists(directory + path.Replace("/", "\\"))) { result = path; } } catch (Exception ex) { Log4Helper.WriteLog("保存文件失败", ex); } return(result); }