public void SubscribeToNewsHeadlineStream()
{
string searchKeywords = SearchTextBox.Text;
App.ctx.BeginLogIn(App.USERNAME, App.PASSWORD, a =>
{
App.ctx.EndLogIn(a);
//Next we create a connection to the streaming api, using the authenticated session
streamingClient = App.StreamingClient;
streamingClient.Connect();
//And instantiate a listener for news headlines on the appropriate topic
//You can have multiple listeners on one connection
newsListener = streamingClient.BuildNewsHeadlinesListener(searchKeywords);
newsListener.Start();
//The MessageRecieved event will be triggered every time a new News headline is available,
//so attach a handler for that event, and wait until something comes through
NewsDTO recievedNewsHeadline = null;
newsListener.MessageReceived += (s, e) =>
{
recievedNewsHeadline = e.Data;
//Add this new news headline to the main items collection.
ItemViewModel item = new ItemViewModel();
item.Headline = recievedNewsHeadline.Headline;
item.PublishDate = recievedNewsHeadline.PublishDate.ToString();
recievedNewsHeadline.StoryId = recievedNewsHeadline.StoryId;
App.ViewModel.LoadData(item);
};
}, null);
}
/// <summary>
/// Adds given item to news item collection
/// </summary>
/// <param name="item"></param>
public void LoadData(ItemViewModel item)
{
Deployment.Current.Dispatcher.BeginInvoke(() =>
{
Items.Add(item);
});
IsDataLoaded = true;
}
