基于.NET Core2的图片上传

其实，.NET Core2的图片上传挺好做的，只是，有些坑要注意。。。。。。。话不多说，上代码

   public async Task<IActionResult> Upload([FromServices]IHostingEnvironment environment)

         {

             var data = new PicData();

             string path = string.Empty;

             var files = Request.Form.Files.Where(c => c.Name == "MyPhoto01");

             if (files == null || files.Count() <= ) { data.Msg = "请选择上传的文件。"; return Json(data); }

             //格式限制

             var allowType = new string[] { "image/jpg", "image/png" };

             if (files.Any(c => allowType.Contains(c.ContentType)))

             {

                 if (files.Sum(c => c.Length) <=  *  * )

                 {

                     foreach (var file in files)

                     {

                         string strpath = Path.Combine("Upload", DateTime.Now.ToString("MMddHHmmss") + file.FileName);

                         path = Path.Combine(environment.WebRootPath, strpath);

                         using (var stream = new FileStream(path, FileMode.OpenOrCreate, FileAccess.ReadWrite))

                         {

                             await file.CopyToAsync(stream);

                         }

                     }

                     data.Msg = "上传成功";

                     return Json(data);

                 }

                 else

                 {

                     data.Msg = "图片过大";

                     return Json(data);

                 }

             }

             else

             {

                 data.Msg = "图片格式错误";

                 return Json(data);

             }

         }

 public class PicData

     {

         public string Msg { get; set; }

     }

注意:([FromServices]IHostingEnvironment environment,一定要加上FromServices这个特性!!!