HttpRequest.Content.IsMimeMultipartContent() 在应该返回 true 时返回 false

Question

我需要将 HTTP 请求作为 MultiPartFormData 发送到 REST 控制器。它工作正常，但现在我对控制器的检查声称请求的类型不正确，即使我可以在调试器中看到请求的类型正确。供参考：

这是调用它的控制台应用程序代码：

using System;
using System.IO;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text;

namespace QuickUploadTestHarness
{
    class Program
    {
        static void Main(string[] args)
        {
            using (var client = new HttpClient())
            using (var content = new MultipartFormDataContent())
            {
                // Make sure to change API address
                client.BaseAddress = new Uri("http://localhost");

                // Add first file content 
                var fileContent1 = new ByteArrayContent(File.ReadAllBytes(@"C:\<filepath>\test.txt"));
                fileContent1.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment")
                {
                    FileName = "testData.txt"
                };

                //Add Second file content
                var fileContent2 = new ByteArrayContent(File.ReadAllBytes(@"C:\<filepath>\test.txt"));
                fileContent2.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment")
                {
                    FileName = "Sample.txt"
                };

                content.Add(fileContent1);
                content.Add(fileContent2);

                // Make a call to Web API
                var result = client.PostAsync("/secret/endpoint/relevant/bits/here/", content).Result;

                Console.WriteLine(result.StatusCode);
                Console.ReadLine();
            }
        }
    }
}

它怎么可能被解释为不是 MultiPartFormData？请注意请求的“using MultiPartFormDataContent”

Answer 1

对于MultiPartFormDataContent，您可以尝试使用带有name 和filename 参数的content.Add 重载。 MSDN MultipartFormDataContent.Add Method (HttpContent, String, String)