项目结构调整

Others/Live-Charts-master/Examples/UWP/CartesianChart/Linq/LinqExample.xaml.cs

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+using LiveCharts;
+using LiveCharts.Configurations;
+using System;
+using System.Collections.ObjectModel;
+using System.Linq;
+using Windows.UI.Xaml;
+using Windows.UI.Xaml.Controls;
+using LiveCharts.Helpers;
+
+// The Blank Page item template is documented at http://go.microsoft.com/fwlink/?LinkId=234238
+
+namespace UWP.CartesianChart.Linq
+{
+    /// <summary>
+    /// An empty page that can be used on its own or navigated to within a Frame.
+    /// </summary>
+    public sealed partial class LinqExample : Page
+    {
+        public LinqExample()
+        {
+            InitializeComponent();
+
+            //lets configure the chart to plot cities
+            Mapper = Mappers.Xy<City>()
+                .X((city, index) => index)
+                .Y(city => city.Population);
+
+            MillionFormatter = value => (value / 1000000).ToString("N") + "M";
+
+            this.Loading += LinqExample_Loading;
+
+            DataContext = this;
+        }
+
+        private async void LinqExample_Loading(FrameworkElement sender, Object args)
+        {
+            await DataBase.Initialize();
+
+            //lets take the first 15 records by default;
+            var records = DataBase.Cities.OrderByDescending(x => x.Population).Take(15).ToArray();
+
+            Results = records.AsChartValues();
+            Labels = new ObservableCollection<string>(records.Select(x => x.Name));
+        }
+
+        public ChartValues<City> Results { get; set; }
+        public ObservableCollection<string> Labels { get; set; }
+        public Func<double, string> MillionFormatter { get; set; }
+
+        public object Mapper { get; set; }
+
+        private void TextBoxBase_OnTextChanged(object sender, TextChangedEventArgs e)
+        {
+            var q = (Query.Text ?? string.Empty).ToUpper();
+
+            var records = DataBase.Cities
+                .Where(x => x.Name.ToUpper().Contains(q) || x.Country.ToUpper().Contains(q))
+                .OrderByDescending(x => x.Population)
+                .Take(15)
+                .ToArray();
+
+            Results.Clear();
+            Results.AddRange(records);
+
+            Labels.Clear();
+            foreach (var record in records) Labels.Add(record.Name);
+
+        }
+    }
+}