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