Arcgis silverlight-7 map extent and mouse coordinate

1、功能介绍

     This sample show map extent and mouse coordinate

2、代码详解

     MainPage.axml中 

 

代码

< UserControl x:Class = " SilverlightApplication1.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:DesignHeight = " 300 "  d:DesignWidth = " 400 "  xmlns:esri = " http://schemas.esri.com/arcgis/client/2009 " >

     < Grid x:Name = " LayoutRoot "  Background = " White " >

         < esri:Map x:Name = " MyMap "
                  MouseMove = " MyMap_MouseMove "  ExtentChanged = " MyMap_ExtentChange "  ExtentChanging = " MyMap_ExtentChange " >  //一个mouse移动触发函数，二个地图范围改变时触发函数
             < esri:ArcGISTiledMapServiceLayer ID = " MyLayer "  
                Url = " http://server.arcgisonline.com/ArcGIS/rest/services/ESRI_ShadedRelief_World_2D/MapServer " />
         </ esri:Map >


         < Canvas Width = " 225 "  Height = " 90 "  HorizontalAlignment = " Right "  VerticalAlignment = " Top "  Margin = " 0,15,15,0 "   >
             < Rectangle Stroke = " Gray "   RadiusX = " 10 "  RadiusY = " 10 "  Fill = " #775C90B2 "  Canvas.Left = " 0 "  Canvas.Top = " 0 "  Width = " 225 "  Height = " 90 "   >
                 < Rectangle.Effect >
                     < DropShadowEffect />
                 </ Rectangle.Effect >
             </ Rectangle >
             < Rectangle Fill = " #FFFFFFFF "  Stroke = " DarkGray "  RadiusX = " 5 "  RadiusY = " 5 "  Canvas.Left = " 10 "  Canvas.Top = " 10 "  Width = " 205 "  Height = " 70 "    />
             < TextBlock x:Name = " ExtentTextBlock "  Text = " Extent:  "  Margin = " 20,14,15,0 "  TextWrapping = " Wrap "  FontWeight = " Bold "   />  //ExtentTextBlock显示地图范围
         </ Canvas >

         < Grid Width = " 355 "  Height = " 65 "  HorizontalAlignment = " Right "  VerticalAlignment = " Top "  Margin = " 0,111,0,0 "   >
             < Rectangle Stroke = " Gray "   RadiusX = " 10 "  RadiusY = " 10 "  Fill = " #775C90B2 "  Margin = " 0,0,0,6 "   >
                 < Rectangle.Effect >
                     < DropShadowEffect />
                 </ Rectangle.Effect >
             </ Rectangle >
             < Rectangle Fill = " #FFFFFFFF "  Stroke = " DarkGray "  RadiusX = " 5 "  RadiusY = " 5 "  Margin = " 10,10,10,15 "    />
             < StackPanel Canvas.Left = " 20 "  Canvas.Top = " 14 "  Margin = " 20,14,10,0 " >
                 < TextBlock x:Name = " ScreenCoordsTextBlock "    //ScreenCoordsTextBlock显示屏幕坐标

                    HorizontalAlignment = " Left "  VerticalAlignment = " Center "  Text = " Screen Coords:  "  TextWrapping = " Wrap "  FontWeight = " Bold "   />
                 < TextBlock x:Name = " MapCoordsTextBlock "    //MapCoordsTextBlock显示地图坐标
                    HorizontalAlignment = " Left "  VerticalAlignment = " Center "  Text = " Map Coords:  "  TextWrapping = " Wrap "  FontWeight = " Bold "   />
             </ StackPanel >
         </ Grid >

     </ Grid >
     
</ UserControl >

 

 

MainPage.axml.cs中 

 

代码

using  System;
using  System.Collections.Generic;
using  System.Linq;
using  System.Net;
using  System.Windows;
using  System.Windows.Controls;
using  System.Windows.Documents;
using  System.Windows.Input;
using  System.Windows.Media;
using  System.Windows.Media.Animation;
using  System.Windows.Shapes;

namespace  SilverlightApplication1
{
     public   partial   class  MainPage : UserControl
    {
         public  MainPage()
        {
            InitializeComponent();
        }

         void  MyMap_ExtentChange( object  sender, ESRI.ArcGIS.Client.ExtentEventArgs args)//地图范围改变时触发
        {
            setExtentText(args.NewExtent);
        }

         private   void  setExtentText(ESRI.ArcGIS.Client.Geometry.Envelope newExtent)//将ExtentTextBlock设置为当前地图范围
        {
            ExtentTextBlock.Text  =   string .Format( " MinX: {0}\nMinY: {1}\nMaxX: {2}\nMaxY: {3} " ,
                newExtent.XMin, newExtent.YMin, newExtent.XMax, newExtent.YMax);
        }

         private   void  MyMap_MouseMove( object  sender, MouseEventArgs e) //MouseMove触发鼠标坐标显示
        {
             if  (MyMap.Extent  !=   null )
            {
                System.Windows.Point screenPoint  =  e.GetPosition(MyMap);
                ScreenCoordsTextBlock.Text  =   string .Format( " Screen Coords: X = {0}, Y = {1} " ,
                    screenPoint.X, screenPoint.Y);

                ESRI.ArcGIS.Client.Geometry.MapPoint mapPoint  =  MyMap.ScreenToMap(screenPoint);
                MapCoordsTextBlock.Text  =   string .Format( " Map Coords: X = {0}, Y = {1} " ,
                    Math.Round(mapPoint.X,  4 ), Math.Round(mapPoint.Y,  4 ));
            }

        }     

    }
}

 

 

3、界面