.NET MVC 后台接受base64的上传图片

 1 ????????#region 配合前端的多张图片上传 2 ????????#region 上传图片方法 3 ????????/// <summary> 4 ????????/// 接口方法 5 ????????/// </summary> 6 ????????/// <param name="img">带 data:image/jpeg;base64,的base64的图片</param> 7 ????????/// <returns>图片路径</returns> 8 ????????[HttpPost] 9 ????????public ActionResult GETaddimg2(String img)10 ????????{11 ????????????if (img == null)12 ????????????{13 ????????????????return Json("空");14 ????????????}15 ????????????else16 ????????????{17 ????????????????return Json(PDUploadImage(img), JsonRequestBehavior.AllowGet);18 ????????????}19 ????????}20 ????????#endregion21 ????????#region 图片转化22 ????????/// <summary>23 ????????/// base64 的字符串24 ????????/// </summary>25 ????????/// <param name="img"></param>26 ????????/// <returns>图片转成32的名字</returns>27 ????????public JsonResult PDUploadImage(string img)28 ????????{29 ????????????string error = "";30 ????????????return Json(SaveImage("/Upload/Article", img, ref error), JsonRequestBehavior.AllowGet);31 ????????}32 ????????#endregion33 ????????#region 截取data:image/jpeg;base64,提取图片，并保存图片34 ????????/// <summary>35 ????????/// 截取data:image/jpeg;base64,提取图片，并保存图片36 ????????/// </summary>37 ????????/// <param name="file_name"></param>38 ????????/// <param name="img_string">base64的字符串</param>39 ????????/// <param name="error">错误的图片格式</param>40 ????????/// <returns>路径 + 图片的名称</returns>41 ????????private string SaveImage(string file_name, string img_string, ref string error)42 ????????{43 ????????????//try44 ????????????//{45 ????????????string[] img_array = img_string.Split(‘,‘);46 ????????????byte[] arr = Convert.FromBase64String(img_array[1]);47 ????????????using (MemoryStream ms = new MemoryStream(arr))48 ????????????{49 ????????????????Bitmap bmp = new Bitmap(ms);50 ????????????????if (img_array[0].ToLower() == "data:image/jpeg;base64")51 ????????????????{52 ????????????????????bmp.Save(file_name + ".jpg");53 ????????????????????return SetImg(Guid.NewGuid().ToString().Replace(‘-‘, ‘p‘).Substring(4), "jpg", arr);54 ????????????????}55 ????????????????else if (img_array[0].ToLower() == "data:image/png;base64")56 ????????????????{57 ????????????????????bmp.Save(file_name + ".png");58 ????????????????????return SetImg(Guid.NewGuid().ToString().Replace(‘-‘, ‘p‘).Substring(4), "png", arr);59 ????????????????}60 ????????????????else if (img_array[0].ToLower() == "data:image/gif;base64")61 ????????????????{62 ????????????????????bmp.Save(file_name + ".gif");63 ????????????????????return SetImg(Guid.NewGuid().ToString().Replace(‘-‘, ‘p‘).Substring(4), "gif", arr);64 ????????????????}65 ????????????????else66 ????????????????{67 ????????????????????error = "不支持该文件格式。";68 ????????????????????return "错";69 ????????????????}70 ????????????}71 ????????????//}72 ????????????//catch (Exception ex)73 ????????????//{74 ????????????// ???error = "生成图片发生错误。" + ex.ToString();75 ????????????// ???return "错";76 ????????????//}77 ????????}78 ????????#endregion79 ????????#region 保存图片路径及设置名称80 ????????/// <summary>81 ????????/// 保存到文件路径82 ????????/// </summary>83 ????????/// <param name="ImgName">保存的文件名称</param>84 ????????/// <param name="suffix">后缀名</param>85 ????????/// <param name="arr">base64</param>86 ????????/// <returns>图片的路径</returns>87 ????????public string SetImg(string ImgName, string suffix, byte[] arr)88 ????????{89 ????????????string str3 = System.AppDomain.CurrentDomain.BaseDirectory;//找到相对路径90 ????????????string str4 = System.AppDomain.CurrentDomain.SetupInformation.ApplicationBase;//找到相对路径91 ????????????System.IO.File.WriteAllBytes(str3 + "/Upload/Article/" + ImgName + "." + suffix + "", arr);92 ????????????return "/Upload/Article/" + ImgName + "." + suffix + "";93 ????????}94 ????????#endregion95 ????????#endregion