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api_v1/Appointment.Entity/Utility/PicHelper.cs

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+using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Drawing.Imaging;
+using System.IO;
+using System.Text;
+
+namespace Appointment.Entity
+{
+    public static class PicHelper
+    {
+        /// <summary>
+        /// 获取图片域名
+        /// </summary>
+        /// <returns></returns>
+        public static string GetPicDomain()
+        {
+            string value = string.Empty;
+            using (System.IO.StreamReader file = System.IO.File.OpenText("appsettings.json"))
+            {
+                using JsonTextReader reader = new JsonTextReader(file);
+                JObject o = (JObject)JToken.ReadFrom(reader);
+                value = Convert.ToString(o["WebApiDomain"]);
+            }
+            if (string.IsNullOrWhiteSpace(value)) throw new Exception("配置信息中缺少WebApiDomain");
+            return value;
+        }
+
+        /// <summary>
+        /// 获取图片保存服务器完整路径
+        /// </summary>
+        /// <returns></returns>
+        public static string GetPicRootPath()
+        {
+            string value = string.Empty;
+            using (System.IO.StreamReader file = System.IO.File.OpenText("appsettings.json"))
+            {
+                using JsonTextReader reader = new JsonTextReader(file);
+                JObject o = (JObject)JToken.ReadFrom(reader);
+                value = Convert.ToString(o["PicRootPath"]);
+            }
+            if (string.IsNullOrWhiteSpace(value)) throw new Exception("配置信息中缺少PicRootPath");
+            return value;
+        }
+
+
+        /// <summary>
+        /// 保存图片
+        /// </summary>
+        /// <param name="base64str">图片BASE64</param>
+        /// <returns>NULL-保存图片异常,""-没有图片,其他-保存后的路径</returns>
+        public static ApiResult<string> SavePic(string base64str)
+        {
+            try
+            {
+                if (string.IsNullOrWhiteSpace(base64str)) return ApiResult<string>.Success(string.Empty);
+                if (base64str.ToLower().IndexOf("imgfile") > 0) return ApiResult<string>.Success(base64str.Substring(base64str.ToLower().IndexOf("imgfile") - 1));
+
+                DateTime now = DateTime.Now;
+                var rd = new Random().Next(100, 999);
+                string filePath = $"/ImgFile/{now:yyyyMM}";
+                string fileName = $"{now:yyyyMMddHHmmssfff}{rd}";
+                base64str = base64str.Substring(base64str.IndexOf(",") + 1).Trim('\0');
+                byte[] arr = Convert.FromBase64String(base64str);
+                using (MemoryStream ms = new MemoryStream(arr))
+                {
+                    if (!Directory.Exists(GetPicRootPath() + filePath)) Directory.CreateDirectory(GetPicRootPath() + filePath);
+                    Bitmap bmp = new Bitmap(ms);
+
+                    ImageCodecInfo myImageCodecInfo = GetEnoderInfo(bmp.RawFormat.ToString().ToLower());
+                    if (bmp.RawFormat.ToString().ToLower().Contains("jpeg"))
+                    {
+                        fileName = $"{fileName}.jpg";
+                        myImageCodecInfo = GetEnoderInfo("png");
+                    }
+                    else
+                    {
+                        fileName = $"{fileName}.{bmp.RawFormat}";
+                    }
+
+                    EncoderParameters destEncParams = new EncoderParameters(1);
+                    destEncParams.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, 100);
+
+                    bmp.Save($"{GetPicRootPath()}{filePath}/{fileName}", myImageCodecInfo, destEncParams);
+                    ms.Close();
+                }
+
+                return ApiResult<string>.Success($"{filePath}/{fileName}");
+            }
+            catch (Exception ex)
+            {
+                return ApiResult<string>.Failed("保存图片失败，失败信息：" + ex.Message);
+            }
+        }
+
+        #region private
+        private static ImageCodecInfo GetEnoderInfo(string mineType)
+        {
+            ImageCodecInfo[] myEncoders = ImageCodecInfo.GetImageEncoders();
+
+            foreach (System.Drawing.Imaging.ImageCodecInfo myEncoder in myEncoders)
+                if (myEncoder.MimeType.Contains(mineType))
+                    return myEncoder;
+            return null;
+        }
+        #endregion
+
+    }
+}