convert task<string> to string [duplicate]

Question

I want to parse from a JSON file in a universal windows phone application but I can't convert task to string

public MainPage()
    {
        this.InitializeComponent();

        HttpClient httpClient = new HttpClient();
        String responseLine;
        JObject o;
        try
        {
            string responseBodyAsText;

            HttpResponseMessage response = httpClient.GetAsync("http://localhost/list.php").Result;

            //response = await client.PostAsync(url, new FormUrlEncodedContent(values));
            response.EnsureSuccessStatusCode();
            responseBodyAsText = response.Content.ReadAsStringAsync().Result;
           // responseLine = responseBodyAsText;
              string Website = "http://localhost/list.php";
            Task<string> datatask =  httpClient.GetStringAsync(new Uri(string.Format(Website, DateTime.UtcNow.Ticks)));
            string data = await datatask;
            o = JObject.Parse(data);
            Debug.WriteLine("firstname:" + o["id"][0]);
        }
        catch (HttpRequestException hre)
        {
        }

I have error in this line

 string data = await datatask;

how can I fix it?

Answer 1

Looking into this documentation, you can get that using: Result property.

For Example:

    Task<int> task1 = myAsyncMethod(); //You can also use var instead of Task<int>
    int i = task1.Result; 

Answer 2

You cannot use await inside a constructor. You'll need to create an async method for that.

Generally I don't recommend using async void, but when you're calling it from the constructor it's somewhat justified.

public MainPage()
{
    this.InitializeComponent();
    this.LoadContents();
}

private async void LoadContents()
{
    HttpClient httpClient = new HttpClient();
    String responseLine;
    JObject o;
    try
    {
        string responseBodyAsText;

        HttpResponseMessage response = await httpClient.GetAsync("http://localhost/list.php");

        //response = await client.PostAsync(url, new FormUrlEncodedContent(values));
        response.EnsureSuccessStatusCode();
        responseBodyAsText = await response.Content.ReadAsStringAsync();
       // responseLine = responseBodyAsText;
          string Website = "http://localhost/list.php";
        Task<string> datatask =  httpClient.GetStringAsync(new Uri(string.Format(Website, DateTime.UtcNow.Ticks)));
        string data = await datatask;
        o = JObject.Parse(data);
        Debug.WriteLine("firstname:" + o["id"][0]);
    }
    catch (HttpRequestException hre)
    {
        // You might want to actually handle the exception
        // instead of silently swallowing it.
    }
}

Answer 3

Try this:

Task<string> post = postPostAsync("Url", data).Result.Content.ReadAsStringAsync();
post.Result.ToString();