WCFclient operation only Async .Net core 2.0

问题

I added wcf services end point in asp.net core 2.0 to connected services and then I try to use that but with client there is only functions which ended with ..async

I don't want to use ...async.But there is no function without .async

What is problem with this?What should I do?

instead of using that

 var response = SystemClient.SearchCountriesAsync(....

I want to use that

 var response = SystemClient.SearchCountries(...

but it give that error

Error CS1061 'SystemClient' does not contain a definition for 'SearchCountries' and no extension method 'SearchCountries' accepting a first argument of type 'SystemClient' could be found (are you missing a using directive or an assembly reference?)

回答1:

Your client does not expose synchronous method but that shouldn't be a problem for you.

Instead of asynchronously calling the method just do this:

response = SystemClient.SearchAirportsAsync(credentials, SystemHelperLanguageTypes.English, SystemHelperSearchTypes.CodeSearch, "ist").Result;

This will call the method synchronously as it will block the call. Check John Skeets answer here.

That being said I would recomend you use the async method that is provided. To support that you would have to change the Action signature to this:

public async Task<IActionResullt> Index()
{
   SystemClient SystemClient = new SystemClient();
   Credential credential = new Credential();
   credential.UserName = "username";
   credential.UserPassword = "****";

   var response1 = await SystemClient.SearchCountriesAsync(credentials, SystemHelperLanguageTypes.English, SystemHelperSearchTypes.CodeSearch, "TR");
   var response = await SystemClient.SearchAirportsAsync(credentials, SystemHelperLanguageTypes.English, SystemHelperSearchTypes.CodeSearch, "ist");

   //Do whatever you do with those responses

   ViewBag.Language = "ar";
   return View();
}

来源：https://stackoverflow.com/questions/47259297/wcfclient-operation-only-async-net-core-2-0