private async void QueryEvents(string searchTerms)
{
//do an async query to our REST endpoint
string searchUrl = "https://socialevents.azurewebsites.net/api/events/search?tagName=" + searchTerms;
HttpClient hc = new HttpClient();
string data = await hc.GetStringAsync(searchUrl);
//if we got some data back then try and load it into our set of search results of
//social events and Yammer messages
if (!string.IsNullOrEmpty(data))
{
CortanaSearchResult csr = CortanaSearchResult.GetInstanceFromJson(data);
Dispatcher.BeginInvoke(() =>
{
//if we have some data then plug into our UI
if ((csr != null) && ((csr.Events.Count > 0) || (csr.YammerMessages.Count > 0)))
{
WaitBorder.Visibility = System.Windows.Visibility.Collapsed;
WaitImg.Visibility = System.Windows.Visibility.Collapsed;
WaitTxt.Visibility = System.Windows.Visibility.Collapsed;
EventsLst.Visibility = System.Windows.Visibility.Visible;
EventsLst.DataContext = csr.Events;
YammerLst.DataContext = csr.YammerMessages;
}
else
{
//update the UI to show that there were no search results found
WaitBorder.Visibility = System.Windows.Visibility.Visible;
WaitImg.Visibility = System.Windows.Visibility.Visible;
WaitTxt.Visibility = System.Windows.Visibility.Visible;
string notFoundMessage = "Sorry, I couldn't find any results for \"" +
searchTerms + "\"";
WaitTxt.Text = notFoundMessage;
string spokenMessage = HttpUtility.HtmlEncode(notFoundMessage);
StartSpeakingSsml(String.Format(AppResources.SpokenShortSearchEmptyTemplate, searchTerms));
}
SearchTextBox.Text = "";
});
}
}
public static CortanaSearchResult GetInstanceFromJson(string data)
{
CortanaSearchResult returnDataType = new CortanaSearchResult();
try
{
MemoryStream ms = new MemoryStream();
byte[] buf = System.Text.UTF8Encoding.UTF8.GetBytes(data);
ms.Write(buf, 0, Convert.ToInt32(buf.Length));
ms.Position = 0;
DataContractJsonSerializer s = new DataContractJsonSerializer(typeof(CortanaSearchResult));
returnDataType = (CortanaSearchResult)s.ReadObject(ms);
}
catch (Exception ex)
{
Console.WriteLine("Error getting instance from JSON: " + ex.Message);
}
return(returnDataType);
}
