如何让这个超级事件侦听器平静下来

我有一个简单的silverlight工具包 Chart Slider 在同一对照组中。我希望在滑块值更改时更新图表。这应该很简单。我试着绑在绳子上 .ValueChanged 事件,但这似乎太频繁了(例如:滑块仍在运动时多次触发)。我只对滑块停止时的值感兴趣。如果我更新的频率与触发事件的频率一样高,那么性能会非常糟糕。因此,我向 .MouseLeftButtonUp 和 .MouseLeftButtonDown .MouseLeftButtonDown

我是silverlight的新手,所以我正在寻找对该方法的建设性批评以及可能的解决方案。干杯

MainPage.xaml.cs:

using System;
using System.Collections.Generic;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.DataVisualization.Charting;
using System.Windows.Input;

namespace ControlledModelView.Media
{
    public partial class MainPage : UserControl
    {
        readonly Dictionary<KeyValuePair<int, int>, Dictionary<string, double>> data = new Dictionary<KeyValuePair<int, int>, Dictionary<string, double>>();
        readonly Chart chart = new Chart { VerticalAlignment = VerticalAlignment.Top };
        private static bool sliderInMotion = true;
        public MainPage()
        {
            InitializeComponent();
            var rng = new Random();
            for (var i = 0; i < 4; i++)
                for (var d = -1; d >= -31; d--)
                    data.Add(new KeyValuePair<int, int>(i, d), GetRandomData(rng));

            var slider = new Slider { LargeChange = 7, SmallChange = 1, Minimum = -31, Maximum = -1, Value = -1, VerticalAlignment = VerticalAlignment.Bottom };
            slider.ValueChanged += SliderValueChanged;
            slider.MouseLeftButtonUp += SliderRelease;
            slider.MouseLeftButtonDown += SliderLock;
            DrawLineChart(-1);
            LayoutRoot.Children.Add(chart);
            LayoutRoot.Children.Add(slider);
        }

        static void SliderLock(object sender, MouseButtonEventArgs e)
        {
            sliderInMotion = true;
        }

        static void SliderRelease(object sender, MouseButtonEventArgs e)
        {
            sliderInMotion = false;
        }

        void SliderValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)
        {
            if(!sliderInMotion)
                DrawLineChart((int)e.NewValue);
        }

        private void DrawLineChart(int day)
        {
            chart.Series.Clear();
            for (var seriesIndex = 0; seriesIndex < 4; seriesIndex++)
            {
                chart.Series.Add(new LineSeries
                {
                    ItemsSource = data[new KeyValuePair<int, int>(seriesIndex, day)],
                    DependentValuePath = "Value",
                    IndependentValuePath = "Key",
                    AnimationSequence = AnimationSequence.Simultaneous,
                    Name = "Line" + seriesIndex,
                    Title = "Line" + seriesIndex,
                    IsSelectionEnabled = false,
                    Visibility = Visibility.Visible,
                    IsEnabled = true
                });
            }
        }

        static Dictionary<string, double> GetRandomData(Random rng)
        {
            var data = new Dictionary<string, double>();
            for (var year = 1995; year < DateTime.Now.Year; year ++)
                data.Add(year.ToString(), 500000 * rng.NextDouble());
            return data;
        }
    }
}

MainPage.xaml:

<UserControl x:Class="ControlledModelView.Media.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
    mc:Ignorable="d" d:DesignWidth="640" d:DesignHeight="480">
    <Grid x:Name="LayoutRoot" />
</UserControl>