在c#HttpClient 4.5中发布multipart / form-data

问题

我正在尝试发布API以将数据发送到API,该API调用我的内部API服务以将该数据发送到其他API i服务.实体包含带文件的属性.这只将文件发送到另一个派生,但NameSender属性不随文件一起发送.

实体

public class Email
{

    public string NameSender{ get; set; }

    public List<IFormFile> Files { get; set; }


}

API

[Consumes("multipart/form-data")]
[HttpPost]
public IActionResult SendEmail([FromForm]Entity entity)
{
    try
    {
        string Servicesfuri = this.serviceContext.CodePackageActivationContext.ApplicationName + "/" + this.configSettings.SendNotificationServiceName;

        string proxyUrl = $"http://localhost:{this.configSettings.ReverseProxyPort}/{Servicesfuri.Replace("fabric:/","")}/api/values/Send";

        //attachments
        var requestContent = new MultipartFormDataContent();


        foreach (var item in entity.Files)
        {
            StreamContent streamContent = new StreamContent(item.OpenReadStream());
            var fileContent = new ByteArrayContent(streamContent.ReadAsByteArrayAsync().Result);
            requestContent.Add(fileContent,item.Name,item.FileName);

        }

        HttpResponseMessage response = this.httpClient.PostAsync(proxyUrl,requestContent).Result;


        if (response.StatusCode != System.Net.HttpStatusCode.OK)
        {
            return this.StatusCode((int)response.StatusCode);
        }

        return this.Ok(response.Content.ReadAsstringAsync().Result);
    }
    catch (Exception e)
    {
        throw e;
    }
}

解决方法

这种方法适合我.您可以使用表单数据和文件

public async Task<bool> Upload(FileUploadRequest model)
{
    var httpclienthandler = new httpclienthandler()
    {
      Proxy = new WebProxy("proxyAddress","proxyPort")
      {
        Credentials = CredentialCache.DefaultCredentials
      },PreAuthenticate = true,UseDefaultCredentials = true
    };


    var fileContent = new StreamContent(model.File.OpenReadStream())
    {
       Headers =
       {
           ContentLength = model.File.Length,ContentType = new MediaTypeHeaderValue(model.File.ContentType)
       }
    };

    var formDataContent = new MultipartFormDataContent();
    formDataContent.Add(fileContent,"File",model.File.FileName);          // file
    formDataContent.Add(new StringContent("Test Full Name"),"FullName");   // form input

    using (var client = new HttpClient(handler: httpclienthandler,disposeHandler: true))
    {
        client.DefaultRequestHeaders.Add("Authorization","Bearer " + tokenString);

        using (var res = await client.PostAsync("http://filestorageurl",formDataContent))
        {
           return res.IsSuccessstatusCode;
        }
    }
}