如何将文件保存到映射路径apicontroller asp .net mvc4

Question

因此，我正在处理一个项目并使用进度条上传文件。我有进度条工作。我的文件分段到我的控制器，我需要将它保存到服务器。下面是我对apicontroller

namespace MvcMovie.Controllers.WebApi 
{ 
public class UploadController : ApiController 
{ 
    // Enable both Get and Post so that our jquery call can send data, and get a status 
    [HttpGet] 
    [HttpPost] 
    public HttpResponseMessage Upload() 
    { 
     // Get a reference to the file that our jQuery sent. Even with multiple files, they will all be their own request and be the 0 index 
     HttpPostedFile file = HttpContext.Current.Request.Files[0]; 
     // do something with the file in this space 
     // {....} 
     // end of file doing 

     var filelenght = file.ContentLength; 
     // Now we need to wire up a response so that the calling script understands what happened 
     HttpContext.Current.Response.ContentType = "text/plain"; 
     var serializer = new System.Web.Script.Serialization.JavaScriptSerializer(); 
     var result = new { name = file.FileName }; 

     HttpContext.Current.Response.Write(serializer.Serialize(result)); 
     HttpContext.Current.Response.StatusCode = 200; 

     // For compatibility with IE's "done" event we need to return a result as well as setting the context.response 
     return new HttpResponseMessage(HttpStatusCode.OK); 
    } 

} 
} 

代码，但我不能确定如何将文件保存到服务器上，因为它是在段到来。在另外一个项目，我做了我用正常的控制器，只是用这个：

[Authorize] 
    [HttpPost] 
    public ActionResult Index(HttpPostedFileBase file) 
    { 
     var username = WebSecurity.CurrentUserName; 

     if (file.ContentLength > 0) 
     { 

      var fileName = Path.GetFileName(file.FileName); 
      var path = Path.Combine(Server.MapPath("~/App_Data/uploads/" + username), fileName); 
      file.SaveAs(path); 
     } 

     return RedirectToAction("Index"); 
    } 

但是当我尝试在我的apicontroller实现使用Server.Mappath代码不起作用。所以我想我的问题有2个部分你如何保存一个上传的文件在apiwebcontroller，以及如何保存它时，它是分段？

这里是我对它的看法的JavaScript，如果你想看看它：

$(function() { 
     $('#fileupload').fileupload({ 
      dataType: "json", 
      url: "/api/upload", 
      limitConcurrentUploads: 1, 
      sequentialUploads: true, 
      progressInterval: 100, 
      maxChunkSize: 10000, 
      add: function (e, data) { 
       $('#filelistholder').removeClass('hide'); 
       data.context = $('<div />').text(data.files[0].name).appendTo('#filelistholder'); 
       $('</div><div class="progress"><div class="bar" style="width:0%"></div></div>').appendTo(data.context); 
       $('#btnUploadAll').click(function() { 
        data.submit(); 
       }); 
      }, 
      done: function (e, data) { 
       data.context.text(data.files[0].name + '... Completed'); 
       $('</div><div class="progress"><div class="bar" style="width:100%"></div></div>').appendTo(data.context); 
      }, 
      progressall: function (e, data) { 
       var progress = parseInt(data.loaded/data.total * 100, 10); 
       $('#overallbar').css('width', progress + '%'); 
      }, 
      progress: function (e, data) { 
       var progress = parseInt(data.loaded/data.total * 100, 10); 
       data.context.find('.bar').css('width', progress + '%'); 
      } 
     }); 
    }); 

Answer 1

 if (File.Exists(HttpContext.Current.Server.MapPath("~/App_Data/uploads/test/" + file.FileName))) 
     { 
      Stream input = file.InputStream; 
      FileStream output = new FileStream(HttpContext.Current.Server.MapPath("~/App_Data/uploads/test/" + file.FileName), FileMode.Append); 
      byte[] buffer = new byte[8 * 1024]; 
      int len; 
      while ((len = input.Read(buffer, 0, buffer.Length)) > 0) 
      { 
       output.Write(buffer, 0, len); 
      } 
      input.Close(); 
      output.Close(); 
     } 
     else 
     { 
      file.SaveAs(HttpContext.Current.Server.MapPath("~/App_Data/uploads/test/" + file.FileName)); 
     } 

原来这就是我发现，结束了工作。当您使用和API控制器能够将路径映射到您必须使用的服务器时。 HttpContext.Current.Server.MapPath。然后，我所要做的就是创建一个文件并将文件流添加到它。