ASP.NET 如何在 Web API 中读取多部分表单数据？

我将多部分表单数据发送到我的 Web API，如下所示：

string example = "my string";
HttpContent stringContent = new StringContent(example);
HttpContent fileStreamContent = new StreamContent(stream);
using (var client = new HttpClient())
{
    using (var content = new MultipartFormDataContent())
    {
         content.Add(stringContent, "example", "example");
         content.Add(fileStreamContent, "stream", "stream");
         var uri = "http://localhost:58690/api/method";
         HttpResponseMessage response = await client.PostAsync(uri, content);

这是 Web API：

[HttpPost]
[Route("api/method")]
public async Task<HttpResponseMessage> Method()
    {
         // take contents and do something
    }

如何从 Web API 中的请求正文读取字符串和流？

这应该可以帮助您开始：

 var uploadPath = HostingEnvironment.MapPath("/") + @"/Uploads";
 Directory.CreateDirectory(uploadPath);
 var provider = new MultipartFormDataStreamProvider(uploadPath);
 await Request.Content.ReadAsMultipartAsync(provider);

 // Files
 //
 foreach (MultipartFileData file in provider.FileData)
 {
     Debug.WriteLine(file.Headers.ContentDisposition.FileName);
     Debug.WriteLine("File path: " + file.LocalFileName);
 }

 // Form data
 //
 foreach (var key in provider.FormData.AllKeys)
 {
     foreach (var val in provider.FormData.GetValues(key))
     {
          Debug.WriteLine(string.Format("{0}: {1}", key, val));
     }
 }