Use the Httpclient () to send a POST request to get the Token, part of the program is as follows:

 
Public async Task GetAccessTokenAsync () 
{
If (SubscriptionKey==string. The Empty) return string. The Empty; 

//Re - use the cached token if there is one. 
If ((DateTime. Now - storedTokenTime) & lt; TokenCacheDuration) 
{
Return storedTokenValue; 
} 

Using (var client=new HttpClient ()) 
Using (var request=new HttpRequestMessage ()) 
{
Request. The Method=HttpMethod. Post; 
Request. RequestUri=ServiceUrl; 
Request. The Content=new StringContent (string. The Empty); 
Request. Headers. TryAddWithoutValidation (OcpApimSubscriptionKeyHeader, enclosing SubscriptionKey); 
Client. The Timeout=TimeSpan. FromSeconds (2); 

Var response=await client. SendAsync (request); 
Enclosing RequestStatusCode=response. StatusCode; 
The response. EnsureSuccessStatusCode (); 
Var token=await the response. The content. ReadAsStringAsync (); 
StoredTokenTime=DateTime. Now; 
StoredTokenValue="https://bbs.csdn.net/topics/Bearer" + token; 
Return storedTokenValue; 
} 
} 

In the process of debugging, found that the program runs to
Var response=await client. SendAsync (request); , will not be able to continue running down, in the process of neither wrong nor any other news, according to
I am a rookie, has been the problem with two weeks, looking forward to Daniel, please advise,

CodePudding user response:

Await the back of the code is to wait SendAsync success will perform the ah

CodePudding user response:

reference 1st floor Poopaye response:

await the back of the code is to wait SendAsync success will perform the ah

It's has not been successful? So how can I check where is the problem? May probably is the problem?

CodePudding user response:

The building Lord solved? I also met the same problem,

CodePudding user response:

Try catch

CodePudding user response:

The

reference 4 floor woainixinxin521 reply:

try catch

Try catch no flash back directly without any exception

CodePudding user response:

reference 5 floor Fresochoi reply:

Quote: refer to 4th floor woainixinxin521 response:

Try catch

Try catch no flash back directly without any exception

How to flash back directly don't understand

CodePudding user response:

Excuse me, solved yet? My request is to await then thread is blocked

CodePudding user response:

I always don't know the meaning of the asynchronous HTTP...

You access token is eventually to once again to request other interface.

In the call. Also wait. Doesn't it feel...