我正在尝试上传一个文件，我想将当前的 MVC HttpContext.Current.Request.Files 传递给 Web API。
我试图将HttpFileCollectionBaseas 参数传递给 API，但它始终为空。控制器
public object UploadAttachment(string param1, int param2, HttpFileCollectionBase files)
{
string _url = _restUrl + param1+ "/Folders/" + param2+ "/UploadAttachment";
HttpResponseMessage _response = SendJsonRequest(_url, HttpMethod.Post, files);
var ret = DeserializeResponse(_response);
return ret;
}
API代码：
[HttpPost]
[Route("Archives/{param1}/Folders/{param2}/UploadAttachment")]
public IHttpActionResult UploadAttachment([FromUri]string param1, [FromUri]int param2, [FromBody] HttpFileCollectionBase files)
查看代码
using (Ajax.BeginForm("UploadAttachment", null, new { param1 = Model.Param1 }, new AjaxOptions { HttpMethod = "POST", OnSuccess = "uploadAttachmentSuccess" }, new { id = "uploadAttachment", enctype = "multipart/form-data" }))
{
<div class="row">
<div class="col-xs-10">
<div class="input-group">
<label class="input-group-btn" title="">
<span class="btn btn-primary">
<input type="file" name="file_upload" id="file_upload" style="display: none;" multiple />
Browse
</span>
</label>
<input type="text" id="file_upload_name" class="form-control" readonly>
</div>
</div>
<div class="col-xs-2">
<button type="submit" class="btn btn-success" data-toggle="tooltip" id="btn-submit-upload" title="" disabled>
Upload
</button>
</div>
</div>
<div class="row">
<div class="col-xs-12" id="warning-format">
</div>
</div>
}
SendJsonRequest 实现
protected virtual HttpResponseMessage SendJsonRequest(string url, HttpMethod method, object objectToSerialize = null, bool tryToRefreshToken = true)
{
...
HttpRequestMessage _request = new HttpRequestMessage(method, _uri);
if (objectToSerialize != null)
{
string _serializedJSONObject = JsonConvert.SerializeObject(objectToSerialize);
_request.Content = new StringContent(_serializedJSONObject);
_request.Content.Headers.ContentType = new MediaTypeHeaderValue("application/json");
}...
我创建了一个示例，用于将文件从 MVC 控制器上传到 Web Api 控制器，并且运行良好
MVC控制器：
[ActionName("FileUpload")]
[HttpPost]
public ActionResult FileUpload_Post()
{
if (Request.Files.Count > 0)
{
var file = Request.Files[0];
using (HttpClient client = new HttpClient())
{
using (var content = new MultipartFormDataContent())
{
byte[] fileBytes = new byte[file.InputStream.Length + 1]; file.InputStream.Read(fileBytes, 0, fileBytes.Length);
var fileContent = new ByteArrayContent(fileBytes);
fileContent.Headers.ContentDisposition = new System.Net.Http.Headers.ContentDispositionHeaderValue("attachment") { FileName = file.FileName };
content.Add(fileContent);
var result = client.PostAsync(requestUri, content).Result;
if (result.StatusCode == System.Net.HttpStatusCode.Created)
{
ViewBag.Message= "Created";
}
else
{
ViewBag.Message= "Failed";
}
}
}
}
return View();
}
Web API 控制器：
[HttpPost]
public HttpResponseMessage Upload()
{
if(!Request.Content.IsMimeMultipartContent())
{
throw new HttpResponseException(HttpStatusCode.UnsupportedMediaType);
}
if (System.Web.HttpContext.Current.Request.Files.Count > 0)
{
var file = System.Web.HttpContext.Current.Request.Files[0];
....
// save the file
....
return new HttpResponseMessage(HttpStatusCode.Created);
}
else
{
return new HttpResponseMessage(HttpStatusCode.BadRequest);
}
}
有关在 Web Api 中保存文件的更多信息，请参阅Web API：文件上传
希望有帮助！
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