Base64編碼存儲為圖片文件

        /// <summary>
        /// Base64編碼存儲為圖片文件
        /// </summary>
        /// <param name="base64Str">Base64編碼</param>
        /// <param name="savePath">圖片完整路徑</param>
        /// <returns></returns>
        public bool Base64StrToImage(string base64Str, string savePath)
        {
            var ret = true;
            try
            {
                base64Str = base64Str.Replace("data:image/png;base64,", "").Replace("data:image/jgp;base64,", "")
                    .Replace("data:image/jpg;base64,", "").Replace("data:image/jpeg;base64,", ""); //將base64頭部信息替換
                var bytes = Convert.FromBase64String(base64Str);
                var dicPath = savePath.Substring(0,savePath.LastIndexOf('\\'));
                if (!Directory.Exists(dicPath))
                {
                    Directory.CreateDirectory(dicPath);
                }

                using (var imageFile = new FileStream(savePath, FileMode.Create))
                {
                    imageFile.Write(bytes, 0, bytes.Length);
                    imageFile.Flush();
                }
            }
            catch (Exception ex)
            {
                ret = false;
            }
            return ret;
        }