Visual Studio 2017 工作室显示错误“此应用程序处于中断模式”并引发未处理的异常

Question

I am developing a Xamarin.Android app. Whenever i try to download a JSON feed I get the error "Your app has entered a break state, but there is no code to show because all threads were executing external code" .

Here's the screenshot of error

• My json feed download code

   string url = "http://xamdev.epizy.com/getData1.php"; public async void downloadJsonFeedAsync(String url) { var httpClient = new HttpClient(); Task<string> contentsTask = httpClient.GetStringAsync(url); // await! control returns to the caller and the task continues to run on another thread string content = await contentsTask; Console.Out.WriteLine("Response Body: \\r\\n {0}", content); //Convert string to JSON object result = Newtonsoft.Json.JsonConvert.DeserializeObject<RootObject> (content); //Update listview RunOnUiThread (() => { listView.Adapter = new CusotmListAdapter(this, result.posts); progress.Visibility = ViewStates.Gone; }); }

• i have got error at this line

  string content = await contentsTask;

• This is my json

  { "posts":[ { "id":"1", "url":"", "title":"Convert Speech to Text in Android Application", "date":"2017-06-16 06:15:18", "content":"Convert Speech to Tex Convert Speech to Text in Android Application Convert Speech to Text in Android Applicationt in Android Application", "thumbnail":"http:\\/\\/stacktips.com\\/wp-content\\/uploads\\/2017\\/01\\/Speech-to-Text-in-Android-375x300.jpeg" } ] }

Please can anybody tell me whats wrong with my code ? Thanks in advance..

Here's my php webservice code -

<?php 

if($_SERVER['REQUEST_METHOD']=='GET'){

    require_once('conn.php');

    $sql = "SELECT * FROM space";


    if ($result = mysqli_query($conn, $sql))
     {
      $resultArray = array();
      $tempArray = array();


       while($row = $result->fetch_object())
       {

         $tempArray = $row;
          array_push($resultArray, $tempArray);
      }


    echo json_encode(array("result"=>$resultArray));
    }
        mysqli_close($conn);

     }
   ?>               

Answer 1

I'm surprised yet not best answer posted for this issue. For me above solutions didn't work. To resolve this issue, I'd to disable following option from debug menu.

Debug > Options > General > Uncheck "Enable Just My Code"

For more details, check microsoft msdn help.

Answer 2

You should be getting exception details and a call stack, which will greatly aid in your debugging efforts. I think this is a bug with Xamarin on VS2017 right now.

Answer 3

I ran across this error and looked in the output window after the application failed. In my case I had a method in a view model class with a "Task" that is invoked by the XMAL.

Answer 4

At last i got the answer.

Problem was with my hosting server, server response with cookies in it. That's why my android app unable to parse the json.

Thanks for help.

Answer 5

In my particular case I checked the debug output window and it mentioned "Cannot find or open the PDB file." I further read and one of the solutions was to check what static variable references I was making. I had a static variable loading from the AppSettings and it was referencing a key that was not present in the app.Config file. I wish the debugger told me directly the reference not found or something like that. Once I had the correct reference key, I was on my way. Hoping this will help somebody else.

Answer 6

In case it helps someone:

The output tab was giving me a message saying that the dll version was incorrect.

The project ran anyway, but for some reason this dll version made my project to go to break mode, I deleted the dll, used a previous version, and now I can debug without problems