项目结构调整

Others/Live-Charts-master/Examples/Wpf/CartesianChart/SharedTooltip/SharedTooltipExample.xaml

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+<UserControl x:Class="Wpf.CartesianChart.SharedTooltip.SharedTooltipExample"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
+             xmlns:local="clr-namespace:Wpf.CartesianChart.SharedTooltip"
+             xmlns:lvc="clr-namespace:LiveCharts.Wpf;assembly=LiveCharts.Wpf"
+             mc:Ignorable="d" 
+             d:DesignHeight="300" d:DesignWidth="300" d:DataContext="{d:DesignInstance local:SharedTooltipExample }">
+    <Canvas Name="CanvasContainer">
+
+        <!-- 
+        the tooltip requires a canvas to move properly, 
+        so lets wrap our view where you need a shared tooltip 
+        with a Canvas container
+        -->
+
+        <lvc:DefaultTooltip Name="CurrentTooltip" Visibility="Hidden" 
+                            Panel.ZIndex="100"
+                            Canvas.Left="0" Canvas.Top="0"
+                            IsWrapped="True">
+            <!--
+            it needs to: 
+            1. Have an initial position
+            2. Be hidden on startup
+            3. to be wrapped in a Canvas, and say it with IsWrapped = true
+            -->
+        </lvc:DefaultTooltip>
+
+        <Grid Height="{Binding ActualHeight, ElementName=CanvasContainer}" 
+              Width="{Binding ActualWidth, ElementName=CanvasContainer}">
+            <Grid.ColumnDefinitions>
+                <ColumnDefinition Width="*"></ColumnDefinition>
+                <ColumnDefinition Width="*"></ColumnDefinition>
+                <ColumnDefinition Width="*"></ColumnDefinition>
+            </Grid.ColumnDefinitions>
+
+            <lvc:CartesianChart Grid.Column="0" Background="White"
+                            DataTooltip="{Binding ElementName=CurrentTooltip}">
+                <lvc:CartesianChart.Series>
+                    <lvc:LineSeries Values="1,2,3,4,5" LabelPoint="{Binding LabelPoint}"></lvc:LineSeries>
+                </lvc:CartesianChart.Series>
+            </lvc:CartesianChart>
+            <lvc:CartesianChart Grid.Column="1" Background="White"
+                            DataTooltip="{Binding ElementName=CurrentTooltip}">
+                <lvc:CartesianChart.Series>
+                    <lvc:LineSeries Values="1,2,3,4,5" LabelPoint="{Binding LabelPoint}"></lvc:LineSeries>
+                </lvc:CartesianChart.Series>
+            </lvc:CartesianChart>
+            <lvc:CartesianChart Grid.Column="2" Background="White"
+                            DataTooltip="{Binding ElementName=CurrentTooltip}">
+                <lvc:CartesianChart.Series>
+                    <lvc:LineSeries Values="1,2,3,4,5" LabelPoint="{Binding LabelPoint}" ></lvc:LineSeries>
+                </lvc:CartesianChart.Series>
+            </lvc:CartesianChart>
+        </Grid>
+    </Canvas>
+</UserControl>

Others/Live-Charts-master/Examples/Wpf/CartesianChart/SharedTooltip/SharedTooltipExample.xaml.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Navigation;
+using System.Windows.Shapes;
+using LiveCharts;
+
+namespace Wpf.CartesianChart.SharedTooltip
+{
+    /// <summary>
+    /// Interaction logic for SharedTooltip.xaml
+    /// </summary>
+    public partial class SharedTooltipExample : UserControl
+    {
+        public SharedTooltipExample()
+        {
+            InitializeComponent();
+
+            LabelPoint = x => "A long label so it overflows " + x;
+
+            DataContext = this;
+        }
+
+        public Func<ChartPoint, string> LabelPoint { get; set; }
+    }
+}