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[英]Why should I use IHttpActionResult instead of HttpResponseMessage?
[英]ASP.Net WebAPI: How to use IHttpActionResult instead of HttpResponseMessage
我想使用IHttpActionResult
而不是HttpResponseMessage
。 在下面的代码中,我使用了HttpResponseMessage
但在寻找一些指导方针如何重组下面的代码以将IHttpActionResult
与return Ok()
和return NotFound();
请指导我如何重组下面的代码,这样我将能够使用Ok()
返回数据列表,同时告诉我在NotFound();
找不到数据时如何返回错误消息NotFound();
[System.Web.Http.HttpGet, System.Web.Http.Route("UserAppointments/{email}")]
public System.Net.Http.HttpResponseMessage UserAppointments(string email = null)
{
System.Net.Http.HttpResponseMessage retObject = null;
if (!string.IsNullOrEmpty(email))
{
UserAppointmentService _appservice = new UserAppointmentService();
IEnumerable<Entities.UserAppointments> app = _appservice.GetAppointmentsByEmail(email);
if (app.Count() <= 0)
{
var message = string.Format("No appointment found for the user [{0}]", email);
HttpError err = new HttpError(message);
retObject = Request.CreateErrorResponse(System.Net.HttpStatusCode.NotFound, err);
retObject.ReasonPhrase = message;
}
else
{
retObject = Request.CreateResponse(System.Net.HttpStatusCode.OK, app);
}
}
else
{
var message = string.Format("No email provided");
HttpError err = new HttpError(message);
retObject = Request.CreateErrorResponse(System.Net.HttpStatusCode.NotFound, err);
retObject.ReasonPhrase = message;
}
return retObject;
}
有两种方法可以解决这个问题
第一个方法很简单,只需更改返回类型并将HttpResponseMessage
传递给ResponseMessage
,该方法返回一个IHttpActionResult
派生类。
[HttpGet]
[Route("UserAppointments/{email}")]
public IHttpActionResult UserAppointments(string email = null) {
HttpResponseMessage retObject = null;
if (!string.IsNullOrEmpty(email)) {
UserAppointmentService _appservice = new UserAppointmentService();
IEnumerable<Entities.UserAppointments> app = _appservice.GetAppointmentsByEmail(email);
if (app.Count() <= 0) {
var message = string.Format("No appointment found for the user [{0}]", email);
HttpError err = new HttpError(message);
retObject = Request.CreateErrorResponse(System.Net.HttpStatusCode.NotFound, err);
retObject.ReasonPhrase = message;
} else {
retObject = Request.CreateResponse(System.Net.HttpStatusCode.OK, app);
}
} else {
var message = string.Format("No email provided");
HttpError err = new HttpError(message);
retObject = Request.CreateErrorResponse(System.Net.HttpStatusCode.NotFound, err);
retObject.ReasonPhrase = message;
}
return ResponseMessage(retObject);
}
替代方法是重构该方法,以遵循Asp.Net Web API 2文档中的语法建议。
[HttpGet]
[Route("UserAppointments/{email}")]
public IHttpActionResult UserAppointments(string email = null) {
if (!string.IsNullOrEmpty(email)) {
var _appservice = new UserAppointmentService();
IEnumerable<Entities.UserAppointments> app = _appservice.GetAppointmentsByEmail(email);
if (app.Count() <= 0) {
var message = string.Format("No appointment found for the user [{0}]", email);
return Content(HttpStatusCode.NotFound, message);
}
return Ok(app);
}
return BadRequest("No email provided");
}
请尝试以下操作:
[HttpGet("{email}")]
[Route("UserAppointments/{email}")]
public IHttpActionResult GetAppoinment(string email = null){
if (!string.IsNullOrEmpty(email)){
//Your business logic ...
List<UserAppointment> app = new List<UserAppointment>();
if (app.Count() <= 0)
return Content(HttpStatusCode.NoContent, string.Format("No appointment found for the user [{0}]", email));
else
return Ok(app);
} else {
return BadRequest("No email provided");
}
}
进一步阅读:
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