Visual Studio 2012 年的 HTTPClient POST

Question

我想 post 数据到 REST API，但它没有创建正确的请求：

using (var client = new HttpClient())
{
client.DefaultRequestHeaders.Add("Accept", "text/csv");
HttpResponseMessage response = null;

string baseUrl = ServiceUrl + "/api/v25/upload/test";

Dictionary<string, string> parameters = new Dictionary<string, string>();

parameters.Add("field1", "value1");
parameters.Add("field2", "value2");

MultipartFormDataContent form = new MultipartFormDataContent();
HttpContent content = new StringContent("long text...");
content.Headers.ContentType = new MediaTypeHeaderValue("text/csv");
HttpContent fields = new FormUrlEncodedContent(parameters);
form.Add(content, "message");
form.Add(fields);

response = client.PostAsync(baseUrl, form).Result;
var message = response.Content.ReadAsStringAsync().Result;
}

这使得 URL:

POST /api/v25/upload/test HTTP/1.1

这将是正确的地址：

POST /api/v25/upload/test?field1=value1&field2=value2 HTTP/1.1

请问代码哪里出错了？

Answer 1

HttpClient 没有可让您构建查询字符串的 API。有关使用 HttpUtility.ParseQueryString.

执行此操作的代码，请参阅

或使用RestSharp代替：

var request = new RestRequest("/api/v25/upload/test", Method.POST);
request.AddParameter("field1", "value1", ParameterType.UrlSegment);

Visual Studio 2012 年的 HTTPClient POST

HTTPClient POST in Visual Studio 2012

c#

dotnet-httpclient