问题描述
我想从外部控制器方法1调用api方法2，但它会像下面一样抛出异常。请帮助我解决这个问题吗？
如果我调用直接方法然后它工作正常。那么为什么它不是从方法1调用并像下面那样抛出异常。
{message：发生错误。， exceptionMessage：值不能为null。\\\\\\\\\\\\\\\\\\\\\请求，HttpStatusCode statusCode，T值，......}
方法1：
[路线（api / external / vehicles / update）]
公共异步任务< httpresponsemessage> ExternalCustomerUpdateVehicle（VehicleRequest） vehicleRequest）
{
VehicleController VCobj = new VehicleController（）;
返回等待VCobj.CustomerUpdateVehicle（vehicleRequest）;
}
方法2：
[路线（api） / vehicles / update）]
公共异步任务< htt presponsemessage> CustomerUpdateVehicle（VehicleRequest vehicleRequest）
{
//代码部分
返回this.Request.CreateResponse（HttpStatusCode.Created，responseText）;
}
我尝试过：
尝试这样但不成功。
HttpResponseMessage结果=等待VCobj.CustomerUpdateVehicle（vehicleRequest）;
if（result.IsSuccessStatusCode）
{
返回结果;
}
else
{
String responseText =外部客户更新车辆呼叫失败;
返回this.Request.CreateResponse（HttpStatusCode.Created，responseText）;
}
I want to call api method 2 from external controller method 1 but it throw me exception like below.please help me what is the solution of this?
if i call direct method to then it working properly. so why it is not calling from method-1 and throw me exception like below.
{"message":"An error has occurred.","exceptionMessage":"Value cannot be null.\r\nParameter name: request","exceptionType":"System.ArgumentNullException","stackTrace":" at System.Net.Http.HttpRequestMessageExtensions.CreateResponse[T](HttpRequestMessage request, HttpStatusCode statusCode, T value, ......}
Method 1:
[Route("api/external/vehicles/update")]
public async Task<httpresponsemessage> ExternalCustomerUpdateVehicle(VehicleRequest vehicleRequest)
{
VehicleController VCobj = new VehicleController();
return await VCobj.CustomerUpdateVehicle(vehicleRequest);
}
Method 2:
[Route("api/vehicles/update")]
public async Task<httpresponsemessage> CustomerUpdateVehicle(VehicleRequest vehicleRequest)
{
//code part
return this.Request.CreateResponse(HttpStatusCode.Created, responseText);
}
What I have tried:
try like this but not succeed.
HttpResponseMessage result = await VCobj.CustomerUpdateVehicle(vehicleRequest);
if(result.IsSuccessStatusCode)
{
return result;
}
else
{
String responseText = "External Customer update Vehicle Calling Fail";
return this.Request.CreateResponse(HttpStatusCode.Created, responseText);
}
推荐答案
这篇关于从另一个API调用ASP.NET web api的问题。的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！