文件上传Jquery WebApi

我使用以下代码将文件上传到服务器，但文件未上传。

HTML：

 
  
  
 
 Upload  

使用Javascript：

  // Hook into the form's submit event. $('#upload').submit(function () { // To keep things simple in this example, we'll // use the FormData XMLHttpRequest Level 2 object (which // requires modern browsers eg IE10+, Firefox 4+, Chrome 7+, Opera 12+ etc). var formData = new FormData(); // We'll grab our file upload form element (there's only one, hence [0]). var opmlFile = $('#opmlFile')[0]; // If this example we'll just grab the one file (and hope there's at least one). formData.append("opmlFile", opmlFile.files[0]); // Now we can send our upload! $.ajax({ url: 'api/upload', // We'll send to our Web API UploadController data: formData, // Pass through our fancy form data // To prevent jQuery from trying to do clever things with our post which // will break our upload, we'll set the following to false cache: false, contentType: false, processData: false, // We're doing a post, obviously. type: 'POST', success: function () { // Success! alert('Woot!'); } }); // Returning false will prevent the event from // bubbling and re-posting the form (synchronously). return false; }); 

财务主任如下：

  using System; using System.IO; using System.Net; using System.Net.Http; using System.Web; using System.Web.Http; class UploadController : ApiController { public async void Post() { if (!Request.Content.IsMimeMultipartContent()) { throw new HttpResponseException(Request.CreateResponse(HttpStatusCode.NotAcceptable, "This request is not properly formatted")); } // We'll store the uploaded files in an Uploads folder under the web app's App_Data special folder var streamProvider = new MultipartFormDataStreamProvider(HttpContext.Current.Server.MapPath("~/App_Data/Uploads/")); // Once the files have been written out, we can then process them. await Request.Content.ReadAsMultipartAsync(streamProvider).ContinueWith(t => { if (t.IsFaulted || t.IsCanceled) { throw new HttpResponseException(HttpStatusCode.InternalServerError); } // Here we can iterate over each file that got uploaded. foreach (var fileData in t.Result.FileData) { // Some good things to do are to check the MIME type before we do the processing, eg for XML: if (fileData.Headers.ContentType.MediaType.Equals("text/xml", StringComparison.InvariantCultureIgnoreCase)) { // And this is how we can read the contents (note you would probably want to do this asychronously // but let's try keep things simple for now). string contents = File.ReadAllText(fileData.LocalFileName); } } }); } } 

操作命中，但文件未上传。

Answer 1

您可以尝试使用普通按钮代替提交按钮 –

 
  Using JQuery    
   

控制器动作 –

  public HttpResponseMessage Post() { HttpResponseMessage result = null; var httpRequest = HttpContext.Current.Request; // Check if files are available if (httpRequest.Files.Count > 0) { var files = new List(); // interate the files and save on the server foreach (string file in httpRequest.Files) { var postedFile = httpRequest.Files[file]; var filePath = HttpContext.Current.Server.MapPath("~/" + postedFile.FileName); postedFile.SaveAs(filePath); files.Add(filePath); } // return result result = Request.CreateResponse(HttpStatusCode.Created, files); } else { // return BadRequest (no file(s) available) result = Request.CreateResponse(HttpStatusCode.BadRequest); } return result; } 

输出 –

Answer 2

您的javascript未引用正确的文件输入控件。

你需要改变这个var opmlFile = $（’＃opmlFile’）[0];

对此var opmlFile = $（’＃myFile’）[0];