NETCore HttpClient 以Post的方式調用API(不加密)

public static string HttpClientPost(string url, object datajson)
{
HttpClient httpClient = new HttpClient();//http對象
//表頭參數
httpClient.DefaultRequestHeaders.Accept.Clear(); 
httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Value", "123"); //認證token
httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));


//轉為鏈接需要的格式
HttpContent httpContent = new JsonContent(datajson);
//請求
HttpResponseMessage response = httpClient.PostAsync(url, httpContent).Result;
if (response.IsSuccessStatusCode)
{
Task<string> t = response.Content.ReadAsStringAsync();
if (t != null)
{
return t.Result;
}
}
return "";
}