［C# 实战］Google Map开发实战参考 

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using  System;
using  System.Data;
using  System.Configuration;
using  System.Web;
using  System.Web.Security;
using  System.Text;
using  System.Web.UI;
using  System.Web.UI.WebControls;
using  System.Web.UI.WebControls.WebParts;
using  System.Web.UI.HtmlControls;

/**/ ///   <summary>
///  Summary description for GoogleMapCommon
///   </summary>
public   class  GoogleMapCommon
... {
    Page mPageHandel  =   null ;   
     string  mMapDivName  =   string .Empty;
    GoogleMapPoint mCenterPoint;
     string  mMapHandleName;
     int  mMapZoom;
     private   readonly   static   string  mGoogleMapURL  =  ConfigurationManager.AppSettings[ " GoogleMapURL " ];
     /**/ ///   <summary>
     ///  Show Google Map
     ///   </summary>
     ///   <param name="pageHandel"> page handle </param>
     ///   <param name="mapHandleName"> Map Handle Name. </param>
     ///   <param name="mapDivName"> Div where Shows map </param>
     ///   <param name="centerPoint"> center point </param>
     ///   <param name="zoom"> map zoom 1 to 19 </param>
     public  GoogleMapCommon(Page pageHandel,  string  mapHandleName,  string  mapDivName, GoogleMapPoint centerPoint,  int  mapZoom)
     ... {
        mPageHandel  =  pageHandel;
        mMapHandleName  =  mapHandleName;
        mMapDivName  =  mapDivName;
        mCenterPoint  =  centerPoint;
         if  (mapZoom  >   19   ||  mapZoom  <   1 )
         ... {
            mMapZoom  =   4 ;
        }
         else
         ... {
            mMapZoom  =  mapZoom;
        }
    }
     /**/ ///   <summary>
     ///  Show Google mape
     ///   </summary>
     public   void  ShowMap()
     ... {
        ShowMap( null );
    }
     /**/ ///   <summary>
     ///   Show Google mape
     ///   </summary>
     ///   <param name="point"></param>
     public   void  ShowMap(GoogleMapPoint point)
     ... {
        GoogleMapPoint[] points  = ... { point} ;
        ShowMap(points);
    }
     /**/ ///   <summary>
     ///  Show Google mape
     ///   </summary>
     ///   <param name="points"></param>
     public   void  ShowMap(GoogleMapPoint[] points)
     ... {
        mPageHandel.ClientScript.RegisterClientScriptInclude( " GoogleMaps " , mGoogleMapURL);
        StringBuilder js  =   new  StringBuilder( " var  "   +  mMapHandleName  +   "  = null;  " );
        js.AppendLine( " function load() " );
        js.AppendLine( " {  " );
        js.AppendLine( "      if (GBrowserIsCompatible())  " );
        js.AppendLine( "      { " );
        js.AppendLine( "            "   +  mMapHandleName  +   "  = new GMap2(document.getElementById(" "   +  mMapDivName  +   " ")); " );
        js.AppendLine( "       "   +  mMapHandleName  +   " .setCenter(new GLatLng( "   +  mCenterPoint.Latitude  +   " ,  "   +  mCenterPoint.Longitude  +   " ), "   +  mMapZoom  +   " ); " );
         if  (points  !=   null )
         ... {
             for  ( int  i  =   0 ; i  <  points.Length; i ++ )
             ... {
                js.AppendLine( "  var point "   +  i  +   "  = new GLatLng( "   +  points[i].Latitude  +   " ,  "   +  points[i].Longitude  +   " ) " );
                js.AppendLine( " var blueIcon = new GIcon(G_DEFAULT_ICON); " );
                js.AppendLine( " blueIcon.image = "http://www.google.com/intl/en_us/mapfiles/ms/micons/blue-dot.png "; " );
                js.AppendLine( " blueIcon.iconSize = new GSize(35,35); " );
                js.AppendLine( " blueIcon.shadowSize=new GSize(60,35); " );
                js.AppendLine( " markerOptions = { icon:blueIcon };  " ); 
                 if  (points[i].IsBuleIcon)    // Create a blue icon
                 ... {
                    js.AppendLine( "  var marker "   +  i  +   "  = new GMarker(point "   +  i  +   " ,markerOptions); " );
                }
                 else
                 ... {
                    js.AppendLine( "  var marker "   +  i  +   "  = new GMarker(point "   +  i  +   " ); " );
                }
                 if  ( ! string .IsNullOrEmpty(points[i].PointClickHandle))
                 ... {
                     //  add event
                    js.AppendLine( " GEvent.addListener(marker "   +  i  +   " , "click", function(){  "   +  mMapHandleName  +   " .openInfoWindowHtml(point "   +  i  +   " ,  "   +  points[i].PointClickHandle  +   " )}); " );
                }
                js.AppendLine(mMapHandleName  +   " .addOverlay(marker "   +  i  +   " ); " );
            }
        }
        js.AppendLine( "      } " );
        js.AppendLine( " } " );  // create function finsh
        js.AppendLine( " load(); " );    //  call the load function.
        mPageHandel.ClientScript.RegisterStartupScript(mPageHandel.GetType(),  " Start " , js.ToString(), true );
    }
     /**/ ///   <summary>
     ///  Google Map Point
     ///   </summary>
     public   struct  GoogleMapPoint
     ... {
         public  GoogleMapPoint( double  longitude,  double  latitude)
         ... {
            Longitude  =  longitude;
            Latitude  =  latitude;
            PointClickHandle  =   string .Empty;
            IsBuleIcon  =   false ;
        }
         public  GoogleMapPoint( double  longitude,  double  latitude,  string  pointClickHandle,  bool  isBuleIcon)
         ... {
            Longitude  =  longitude;
            Latitude  =  latitude;
            PointClickHandle  =  pointClickHandle;
            IsBuleIcon  =  isBuleIcon;
        }
         public   double  Longitude;
         public   double  Latitude;
         public   string  PointClickHandle;
         public   bool  IsBuleIcon;
    }
}

  该类封装了Google Maps API的一些最基本功能，供大家参考。 详情请参考: http://code.google.com/apis/maps/documentation/index.html