HTTP客户端帖子，带有body参数，并在C＃中进行文件

Question

我试图将csv文件作为我的测试脚本中的正文参数。但是仍然按照以下代码控制器期望文件，只是好奇我应该如何通过。

我在下面的顺序中运行测试脚本

method-1

public void AttachedRatesFile(string fileName)
            {            
                _form = string.IsNullOrWhiteSpace(fileName)
                    ? _form = new StringContent(string.Empty)
                    : _form = new StreamContent(File.OpenRead($"{ResourceFolder}{fileName}"));
                _form.Headers.ContentType = new MediaTypeHeaderValue("application/csv");
                _form.Headers.ContentDisposition = new ContentDispositionHeaderValue(fileName);
            }

method-2

        public void PostRequestExecutes(string resource)
        {
            var content = new MultipartFormDataContent{_form};
            WhenThePostRequestExecutesWithContent(resource, content);
        } 

方法-3

public async void WhenThePostRequestExecutesWithContent(string resource, HttpContent content)
{
    ResponseMessage = await HttpClient.PostAsync(resource, content);
}

我在下面的文件参数中看到null

控制器：

public async Task<IActionResult> SeedData(IFormFile file)
{
    var result = await _seedDataService.SeedData(file);
    return Ok(new { IsUploadSuccesful = result});
}

Answer 1

我将其添加到身体中

var memoryContentStream = new MemoryStream();
using (var streamWriter = new StreamWriter(memoryContentStream, Encoding.UTF8, 1000, 
true))
{
  using (var jsonTextWriter = new JsonTextWriter(streamWriter))
  {
    var jsonSerializer = new JsonSerializer();
    jsonSerializer.Serialize(jsonTextWriter, OBJECT);
    jsonTextWriter.Flush();
  }
}
if (memoryContentStream.CanSeek)
{
  memoryContentStream.Seek(0, SeekOrigin.Begin);
}

然后

using (var streamContent = new StreamContent(memoryContentStream))
            {
                streamContent.Headers.ContentType = new MediaTypeHeaderValue("application/json");
                request.Content = streamContent;
                using (var response = await _httpClient.SendAsync(request, HttpCompletionOption.ResponseHeadersRead))
                {
                    var stream = await response.Content.ReadAsStreamAsync();
                    response.EnsureIsSuccessStatusCode();
                }
            }

以上将首先将内容写入内存流，然后在创建POST请求时，您可以将流以streamContent