Question

我有一个控制器链接到一个输入元素以进行上传。在我的控制器中，我收到了一个我不太了解的怪异错误。严重性代码说明项目路径文件行抑制状态

错误CS1061'HttpRequestMessage'不包含以下定义 “文件”，并且没有可访问的扩展方法“文件”接受第一个可以找到类型为“ HttpRequestMessage”的参数（您是否丢失了使用指令或程序集参考？ >

    using System.Data;
    using System.Linq;
    using System.Web.Http;
    using System.Web.Security;
    using Repositories.Interfaces;
    using Repositories.Interfaces.Dtos;
    using SimSentinel.Models;
    using System;
    using System.Text.RegularExpressions;
    using Newtonsoft.Json.Linq;
    using Newtonsoft.Json.Schema;
    using System;
    using System.Collections.Generic;
    using System.IO;
    using System.Linq;
    using System.Web;
    using System.Web.Mvc;
    //using System.Web.Http.HttpPut;


    namespace SimSentinel.Controllers
    {
        [System.Web.Http.Authorize]
        public class BulkSMSUploadController : ApiController
        {
          public ActionResult Index()
          {
             //ViewBag.Message = "Modify this template to jump-start your ASP.NET MVC application.";

             //return View();
             return null; 
          }

          [System.Web.Mvc.HttpPost]
          public ActionResult UploadFiles()
          {
             if (Request.Files.Count <= 0)
             {
                return Json("No files selected.");
             }
             else
             {
                try
                {
                   HttpFileCollectionBase files = Request.Files;
                   for (int i = 0; i < files.Count; i++)
                   {
                      string path = AppDomain.CurrentDomain.BaseDirectory + "Uploads/";
                      string filename = Path.GetFileName(Request.Files[i].FileName);

                      HttpPostedFileBase file = files[i];
                      string fname;
                      if (Request.Browser.Browser.ToUpper() == "IE" || Request.Browser.Browser.ToUpper() == "INTERNETEXPLORER")
                      {
                         string[] testfiles = file.FileName.Split(new char[] { '\\' });
                         fname = testfiles[testfiles.Length - 1];
                      }
                      else
                      {
                         fname = file.FileName;
                      }

                      fname = Path.Combine(Server.MapPath("~/Uploads/"), fname);
                      file.SaveAs(fname);
                   }

                   return Json("File Uploaded Successfully!");
                }
                catch (Exception ex)
                {
                   return Json("Error occurred. Error details: " + ex.Message);
                }
             }
          }

          //public ActionResult About()
          //{
          //   ViewBag.Message = "Your app description page.";

          //   return View();
          //}
       }
    }

因此，毕竟我已经调整了控制器。请参阅下面的代码，该代码可以工作，但是它会重定向到实际控制器，这在SPA应用程序中是一个问题。此外，该文件还以一种奇怪的格式保存，几乎就像一个随机生成的字符串，例如BodyPart_2ea18b56-0c11-41f6-81ff-204bb377cbbf

using System.Diagnostics;
using System.Net;
using System.Net.Http;
using System.Threading.Tasks;
using System.Web;
using System.Web.Http;

public class Upload2Controller : ApiController
{
   public async Task<HttpResponseMessage> PostFormData()
   {
      // Check if the request contains multipart/form-data.
      if (!Request.Content.IsMimeMultipartContent())
      {
         throw new HttpResponseException(HttpStatusCode.UnsupportedMediaType);
      }

      string root = HttpContext.Current.Server.MapPath("~/Files");
      var provider = new MultipartFormDataStreamProvider(root);

      try
      {
         // Read the form data.
         await Request.Content.ReadAsMultipartAsync(provider);

         // This illustrates how to get the file names.
         foreach (MultipartFileData file in provider.FileData)
         {
            Trace.WriteLine(file.Headers.ContentDisposition.FileName);
            Trace.WriteLine("Server file path: " + file.LocalFileName);
         }
         return Request.CreateResponse(HttpStatusCode.OK);
      }
      catch (System.Exception e)
      {
         return Request.CreateErrorResponse(HttpStatusCode.InternalServerError, e);
      }
   }

}

Answer 1

您应该注意以下步骤。

确保您的表单html元素具有enctype = "multipart/form-data" 所以应该像<form action="someaction" enctype = "multipart/form-data"> </form>

我通常使用html帮助器。

@using (Html.BeginForm("Index", "JobApplication", FormMethod.Post, new { @enctype = "multipart/form-data", @id = "myForm", @class = "form-horizontal" }))
    {
// your input datas
}

如果要发布图像或某些文档（出于使用请求的考虑），则应在ViewModel中使用public HttpPostedFileBase File { get; set; }。然后，您可以轻松地在剃须刀上使用它。

@ Html.TextBoxFor（m => m.File，新的{@ type =“ file”，@onchange =“ SomeValidationOnClientSide（this）;”}）

在后端，您可以验证案件。就我而言，我只接受PDF文件。

if ((from file in model.Files where file != null select file.FileName.Split('.')).Any(arr => arr[arr.Length - 1].ToLower() != "pdf"))
        {
            ModelState.AddModelError(string.Empty, "We only accept PDF files!");
            return View(model);
        }
        if (model.Files.Count() > 2)
        {
            ModelState.AddModelError(string.Empty,
                "You have exceeded maximum file upload size. You can upload maximum 2 PDF file!");
            return View(model);
        }

编辑：我看到您实现了ApiController而不是Contoller。因此，我了解您正在开发WEB.API，因此也应将其添加到问题标记中。

如果要开发ApiController，则应发送byte []并将其处理到apiController中。

Answer 2

据我所见，您的控制器实现了Web API控制器（即使用ApiController.Request），其定义如下所示：

public System.Net.Http.HttpRequestMessage Request { get; set; }

返回类型为HttpRequestMessage，它没有Files属性，而预期的HttpRequestBase则实现为下面的Controller.Request属性的返回类型：

public System.Web.HttpRequestBase Request { get; }

要解决此问题，您需要从System.Web.Mvc.Controller基类继承并将Web API请求移至另一个继承ApiController的类，因为您不能同时继承System.Web.Mvc.Controller和{{1 }}在同一班上：

System.Web.Http.ApiController

如果您要使用Web API控制器上传文件，则应使用namespace SimSentinel.Controllers { public class BulkSMSUploadController : Controller { [System.Web.Mvc.HttpPost] public ActionResult UploadFiles() { if (Request.Files.Count <= 0) { return Json("No files selected."); } else { try { HttpFileCollectionBase files = Request.Files; for (int i = 0; i < files.Count; i++) { string path = AppDomain.CurrentDomain.BaseDirectory + "Uploads/"; string filename = Path.GetFileName(Request.Files[i].FileName); HttpPostedFileBase file = files[i]; string fname; if (Request.Browser.Browser.ToUpper() == "IE" || Request.Browser.Browser.ToUpper() == "INTERNETEXPLORER") { string[] testfiles = file.FileName.Split(new char[] { '\\' }); fname = testfiles[testfiles.Length - 1]; } else { fname = file.FileName; } fname = Path.Combine(Server.MapPath("~/Uploads/"), fname); file.SaveAs(fname); } return Json("File Uploaded Successfully!"); } catch (Exception ex) { return Json("Error occurred. Error details: " + ex.Message); } } } } [System.Web.Http.Authorize] public class BulkSMSUploadWebApiController : ApiController { public IHttpActionResult Index() { return null; } } }来检索this example中提供的HttpResponseMessage的文件详细信息（确保您正在检查{{ 1}}）。

ASP.NET MVC控制器中的文件上传错误（“ HttpRequestMessage”不包含“文件”的定义

2 个答案: