diff --git a/GisDevelop_Exp/MainWindow.xaml b/GisDevelop_Exp/MainWindow.xaml
index 27ff939..9262ab5 100644
--- a/GisDevelop_Exp/MainWindow.xaml
+++ b/GisDevelop_Exp/MainWindow.xaml
@@ -18,6 +18,9 @@
             </MenuItem>
             <MenuItem x:Name="Menu_View" Header="视图"/>
         </Menu>
-        <esri:MapView x:Name="MainMapView" Map="{Binding Map, Source={StaticResource MapViewModel}}" Margin="0,19,0,0" />
+        <esri:MapView x:Name="MainMapView" Map="{Binding Map, Source={StaticResource MapViewModel}}" Margin="0,19,0,0" ViewpointChanged="MainMapView_OnViewpointChanged"/>
+        <Border BorderBrush="#FF8B1D76" BorderThickness="2,2,2,2" HorizontalAlignment="Right" Height="180" Width="202" VerticalAlignment="Top" IsEnabled="False">
+            <esri:MapView x:Name="EagleMapView"/>
+        </Border>
     </Grid>
 </Window>
diff --git a/GisDevelop_Exp/MainWindow.xaml.cs b/GisDevelop_Exp/MainWindow.xaml.cs
index ce7c41a..0232a58 100644
--- a/GisDevelop_Exp/MainWindow.xaml.cs
+++ b/GisDevelop_Exp/MainWindow.xaml.cs
@@ -14,6 +14,9 @@ using System.Windows.Media;
 using System.Windows.Media.Imaging;
 using System.Windows.Navigation;
 using System.Windows.Shapes;
+using Esri.ArcGISRuntime.Geometry;
+using Esri.ArcGISRuntime.Symbology;
+using Color = System.Drawing.Color;
 
 namespace GisDevelop_Exp
 {
@@ -26,6 +29,7 @@ namespace GisDevelop_Exp
         public MainWindow()
         {
             InitializeComponent();
+            EagleMapView.Map = new Map(BasemapStyle.ArcGISImageryStandard);
         }
 
         private void Menu_OpenShp_Click(object sender, RoutedEventArgs e)
@@ -87,5 +91,20 @@ namespace GisDevelop_Exp
         {
             OpenGeoDatabase();
         }
+
+        private void MainMapView_OnViewpointChanged(object? sender, EventArgs e)
+        {
+            EagleMapView.GraphicsOverlays.Clear();
+            Esri.ArcGISRuntime.Geometry.Polygon vExtent = MainMapView.VisibleArea;
+            Envelope eagleViewEnvelop = vExtent.Extent;
+            Color lineColor = Color.FromArgb(255, 255, 0, 0);
+            SimpleLineSymbol lineSymbol = new Esri.ArcGISRuntime.Symbology.SimpleLineSymbol(SimpleLineSymbolStyle.Dash, lineColor,2.0);
+            Color fillColor = Color.FromArgb(0, 0, 0, 0);
+            SimpleFillSymbol fillSymbol = new SimpleFillSymbol(SimpleFillSymbolStyle.Solid, fillColor, lineSymbol);
+            var graphicOverlay = new Esri.ArcGISRuntime.UI.GraphicsOverlay();
+            var envGraphic = new Esri.ArcGISRuntime.UI.Graphic(eagleViewEnvelop, fillSymbol);
+            graphicOverlay.Graphics.Add(envGraphic);
+            EagleMapView.GraphicsOverlays.Add(graphicOverlay);
+        }
     }
 }