我正在尝试加载推文但我的代码在使用我的MVC应用时无效。但是,使用控制台时,确切的代码可以正常工作。
我认为它与“异步”有关,我之前没有使用过这方面的经验,我无法找到解决方案。 “GetAccessToken()”未命中后的断点
在我的控制器中:
public ActionResult Tweets(int tweets, string username)
{
var twitter = new Twitter();
var userTweets = twitter.GetTweets("chrishall9521", 10).Result.ToList();
this.ViewBag.Tweets = userTweets;
return View();
}
在我的“Twitter”课程中:
public async Task<IEnumerable<string>> GetTweets(string userName, int count)
{
var accessToken = await GetAccessToken();
var requestUserTimeline = new HttpRequestMessage(HttpMethod.Get, string.Format("https://api.twitter.com/1.1/statuses/user_timeline.json?count={0}&screen_name={1}&trim_user=1&exclude_replies=1", count, userName));
requestUserTimeline.Headers.Add("Authorization", "Bearer " + accessToken);
var httpClient = new HttpClient();
HttpResponseMessage responseUserTimeLine = await httpClient.SendAsync(requestUserTimeline);
var serializer = new JavaScriptSerializer();
dynamic json = serializer.Deserialize<object>(await responseUserTimeLine.Content.ReadAsStringAsync());
var enumerableTwitts = (json as IEnumerable<dynamic>);
if (enumerableTwitts == null)
{
return null;
}
return enumerableTwitts.Select(t => (string)(t["text"].ToString()));
}
public async Task<string> GetAccessToken()
{
var httpClient = new HttpClient();
var request = new HttpRequestMessage(HttpMethod.Post, "https://api.twitter.com/oauth2/token ");
var customerInfo = Convert.ToBase64String(new UTF8Encoding().GetBytes(OAuthConsumerKey + ":" + OAuthConsumerSecret));
request.Headers.Add("Authorization", "Basic " + customerInfo);
request.Content = new StringContent("grant_type=client_credentials", Encoding.UTF8, "application/x-www-form-urlencoded");
var response = await httpClient.SendAsync(request).ConfigureAwait(false);
string json = await response.Content.ReadAsStringAsync();
var serializer = new JavaScriptSerializer();
dynamic item = serializer.Deserialize<object>(json);
return item["access_token"];
}
答案 0 :(得分:2)
不要那样使用.Result
- 你就是死锁。请改用await
方法中的Tweets
,然后将其设为async
。使用async
的基本“黄金法则”是,当您使用它时,您将一直使用它。
这是一个blog post,其中有类似的例子供进一步阅读。