Exception passing to WPF #4670

7 Answer(s)

• 

  0

  ismcagdas created 6 years ago

  Support Team

  Hi @itzoar2,

  This sample might be helpful for you <a class="postlink" href="https://github.com/aspnetboilerplate/aspnetboilerplate-samples/tree/master/ConsoleRemoteWebApiCall">https://github.com/aspnetboilerplate/as ... WebApiCall</a>.

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• 

  0

  itzoar2 created 6 years ago

  Hi

  So on the Backend server side can we still throw UserFriendlyException ?

  Will AbpRemoteCallException class be able to catch UserFriendlyException ?

  <a class="postlink" href="https://aspnetboilerplate.com/Pages/Documents/Handling-Exceptions">https://aspnetboilerplate.com/Pages/Doc ... Exceptions</a>

  Look forward your reply. Thanks

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• 

  0

  ismcagdas created 6 years ago

  Support Team

  Yes, because UserFriendlyException is serializable, see <a class="postlink" href="https://github.com/aspnetboilerplate/aspnetboilerplate/blob/dev/src/Abp/UI/UserFriendlyException.cs">https://github.com/aspnetboilerplate/as ... ception.cs</a>.

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• 

  0

  itzoar2 created 6 years ago

  When my backend service throw back a new UserFriendlyException

  then on my WPF cleint (below code), i didn't catch on the AbpRemoteCallException block

  So my question is , should I throw userfriendlyxception or abpremotecallexception if know client is not client calling back end while API layer

  Please advise. Thanks a lot

      public async Task<int> AddAsync<TInput>(TInput input, string serviceLink)
      {
          try
          {
              var result = await _abpWebApiClient.PostAsync<object>(BaseUrl + serviceLink, input, timeout: null);
              return Convert.ToInt32(result);
          }
          catch (AbpRemoteCallException e)
          {
              Logger.Error("Error on AddAsync : input " + input.ToString());
              Logger.Error("Error on AddAsync : serviceLink" + serviceLink);
              Logger.Error("Error on AddAsync : Error Message" + e.Message);
              throw;
          }
  
          catch (Exception e)
          {
              Logger.Error("Error on AddAsync : input " + input.ToString());
              Logger.Error("Error on AddAsync : serviceLink" + serviceLink);
              Logger.Error("Error on AddAsync : Error Message" + e.Message);
              throw;
          }
      }
  

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• 

  0

  itzoar2 created 6 years ago

  I have made use the example console app <a class="postlink" href="https://github.com/aspnetboilerplate/aspnetboilerplate-samples/tree/master/ConsoleRemoteWebApiCall">https://github.com/aspnetboilerplate/as ... WebApiCall</a>

  I find that the webapi client won't catch any UserFriendlyException or AbpRemoteCallException exception

  It can only catch Abp.AbpException

  and it always return somethings like

  "Could not made request to <a class="postlink" href="http://localhost:6240/api/services/app/role/GetRoles">http://localhost:6240/api/services/app/role/GetRoles</a>! StatusCode: InternalServerError, ReasonPhrase: Internal Server Error"

  Please advise how can a WPF client that call WebApi layer can get meaningful exception. Thanks

  My backend GetRoles function

      public async Task<ListResultDto<RoleListDto>> GetRoles(GetRolesInput input)
      {
  

  throw new UserFriendlyException(404, "message", "MessageDetail"); var roles = await _roleManager .Roles .WhereIf( !input.Permission.IsNullOrWhiteSpace(), r => r.Permissions.Any(rp => rp.Name == input.Permission && rp.IsGranted) ) .ToListAsync();

          return new ListResultDto<RoleListDto>(roles.MapTo<List<RoleListDto>>());
      }
  

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• 

  0

  itzoar2 created 6 years ago

  Just check the source code of AbpWebApiClient

  <a class="postlink" href="http://sourcebrowser.io/Browse/aspnetboilerplate/aspnetboilerplate/src/Abp.Web.Api/WebApi/Client/AbpWebApiClient.cs">http://sourcebrowser.io/Browse/aspnetbo ... iClient.cs</a>

  Looks like the web api client always throw AbpException. May i know how to change the backend function in order to generate the AbpRemoteCallException in this case. Thanks

      public async Task<TResult> PostAsync<TResult>(string url, object input, int? timeout = null)
          where TResult : class, new()
      {
          using (var client = new HttpClient())
          {
              client.Timeout = timeout.HasValue ? TimeSpan.FromMilliseconds(timeout.Value) : Timeout;
  
              if (!BaseUrl.IsNullOrEmpty())
              {
                  client.BaseAddress = new Uri(BaseUrl);
              }
  
              client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
  
              using (var requestContent = new StringContent(Object2JsonString(input), Encoding.UTF8, "application/json"))
              {
                  using (var response = await client.PostAsync(url, requestContent))
                  {
                      if (!response.IsSuccessStatusCode)
                      {
  

  <span style="color:#0040FF"> throw new AbpException("Could not made request to " + url + "! StatusCode: " + response.StatusCode + ", ReasonPhrase: " + response.ReasonPhrase);</span> }

                      var ajaxResponse = JsonString2Object<AjaxResponse<TResult>>(await response.Content.ReadAsStringAsync());
                      if (!ajaxResponse.Success)
                      {
                          throw new AbpRemoteCallException(ajaxResponse.Error);
                      }
  
                      return ajaxResponse.Result;
                  }
              }
          }
      }
  

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• 

  0

  ismcagdas created 6 years ago

  Support Team

  @itzoar2 The problem is, even when you throw UserFriendlyException on the server side, the returned status code will be 500 to client. So, if you want to get the UserFriendlyException message on the client side, you need to run your code in a try-catch block like below;

  try
  {
      //Make your Http request here...
  }
  catch (WebException wex)
  {
      var pageContent = new StreamReader(wex.Response.GetResponseStream()).ReadToEnd();
  }
  

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