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!!!