15.3 Task 異常
阿新 • • 發佈:2018-12-16
each spa string exception using style font task url
1. 在等待時拆包異常
1 async Task<string> FetchFirstSuccessfulAsync(IEnumerable<string> urls) 2 { 3 //驗證url 4 foreach (string url in urls) 5 { 6 try 7 { 8 using (var client=new HttpClient())9 { 10 return await client.GetStringAsync(url); 11 } 12 } 13 catch (System.Net.WebException) 14 { 15 //記錄日誌 16 } 17 } 18 thrownew System.Net.WebException("No urls Success"); 19 }
15.3 Task 異常