Response status code does not indicate success: 400 (Bad Request).

at System.Net.Http.HttpResponseMessage.EnsureSuccessStatusCode()
at SmartShop.Utils.Rest.RestHelper.PostCallRestfulService[T](String webApiUriRoot, String functionUri, Object requestObj) in d:\rduan\365\Xian\Shared\SmartShop.Utilities\Src\SmartShop.Utils\Rest\RestHelper.cs:line 39

亲，请问这是什么问题呢，我也不知道怎么坏的。

public static T PostCallRestfulService<T>(string webApiUriRoot, string functionUri, object requestObj)
		{
			HttpResponseMessage response = null;
			try
			{
				using (var client = new HttpClient())
				{
					client.BaseAddress = new Uri(webApiUriRoot);
					client.DefaultRequestHeaders.Accept.Clear();
					client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
					response = client.PostAsJsonAsync("api/" + functionUri, requestObj).Result;
					response.EnsureSuccessStatusCode();
					var resultContent = response.Content.ReadAsAsync<T>();
					return resultContent.Result;
				}
			}
			catch
			{
				if (response != null && response.StatusCode == System.Net.HttpStatusCode.Unauthorized)
				{
					throw new UnauthorizedException();
				}
 
				throw;
			}
		}