Table of Contents

News

NewsGrid - a table for displaying news.

Main properties

Below are code fragments demonstrating its usage:

<Window	x:Class="SampleAlfa.NewsWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:loc="clr-namespace:StockSharp.Localization;assembly=StockSharp.Localization"
        xmlns:xaml="http://schemas.stocksharp.com/xaml"
        Title="{x:Static loc:LocalizedStrings.News}" Height="300" Width="1050">
    <xaml:NewsPanel x:Name="NewsPanel"/>
</Window>

private readonly Connector _connector = new Connector();
private void ConnectClick(object sender, RoutedEventArgs e)
{
    // Other connection actions
    
    // Set news provider
    _newsWindow.NewsPanel.NewsProvider = _connector;
    
    // Subscribe to news reception event
    _connector.NewsReceived += OnNewsReceived;
    
    // Create a subscription to news
    var newsSubscription = new Subscription(DataType.News);
    _connector.Subscribe(newsSubscription);
    
    // Perform connection
    _connector.Connect();
}

// Handler for news reception event
private void OnNewsReceived(Subscription subscription, News news)
{
    // Add news to NewsGrid in user interface thread
    this.GuiAsync(() => _newsWindow.NewsPanel.NewsGrid.News.Add(news));
}

News Filtering

// Creating a subscription to news with filtering
public void SubscribeToFilteredNews(string source = null, DateTime? from = null)
{
    // Create a subscription to news
    var newsSubscription = new Subscription(DataType.News)
    {
        MarketData =
        {
            // Set starting date for historical news
            From = from ?? DateTime.Today.AddDays(-7),
            
            // Optionally set news source
            NewsSource = source
        }
    };
    
    // Subscribe to news reception event
    _connector.NewsReceived += OnFilteredNewsReceived;
    
    // Start the subscription
    _connector.Subscribe(newsSubscription);
}

// Handler for filtered news reception events
private void OnFilteredNewsReceived(Subscription subscription, News news)
{
    // Check source filter
    if (subscription.MarketData.NewsSource != null && 
        !string.Equals(news.Source, subscription.MarketData.NewsSource, StringComparison.OrdinalIgnoreCase))
        return;
        
    // Add news to NewsGrid
    this.GuiAsync(() => _newsWindow.NewsPanel.NewsGrid.News.Add(news));
    
    // Output news information
    Console.WriteLine($"News: {news.Headline}");
    Console.WriteLine($"Source: {news.Source}");
    Console.WriteLine($"Time: {news.ServerTime}");
    if (!string.IsNullOrEmpty(news.Story))
        Console.WriteLine($"Text: {news.Story}");
}

Searching News by Keywords

// Method for filtering news by keywords
public void FilterNewsByKeywords(IEnumerable<string> keywords)
{
    var keywordsList = keywords.ToList();
    
    // If already subscribed to news,
    // just set the handler
    _connector.NewsReceived += (subscription, news) =>
    {
        // Check if the news headline contains any of the keywords
        bool containsKeyword = keywordsList.Any(keyword => 
            news.Headline.IndexOf(keyword, StringComparison.OrdinalIgnoreCase) >= 0);
            
        if (containsKeyword)
        {
            // Add news to NewsGrid
            this.GuiAsync(() => _newsWindow.NewsPanel.NewsGrid.News.Add(news));
            
            // Display notification
            ShowNotification($"New news on topic: {news.Headline}");
        }
    };
}
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