我只是小能

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饮食场所地图标注服务功能，即当客户端人员进行属性查询或者空间查询后，如果想进一步获取更加详细的信息，则点击电子地图中其位置图标，则页面将显示企业的具体信息，如特色菜、详细介绍等。还可以通过移动、放大、缩小查看该饮食场所的周边信息。系统的后续工作还将进一步扩展此项相关功能，如到达该地点的公交线路等。图１为系统界面图。需要源码的请留自己的邮箱!

 
   　　　　　　　　　<图１>
图中彩色块体为目标点击物，左键点击后，系统界面的右边将出现其详细信息。如图２

　　　　　　　　　<图2>
　　实现原理为:
（１）在工具栏中加入一个工具按钮。

　　（２）服务器代码方面，首先查找要查询的图层，并将当前点转化成MapPoint

　　（３）关键在于使用以上条件，并采用方法IQueryFunctionality.Identify获取到数据集

　　（４）适当处理，将信息显示在页面上。
整个例子采用Ajax效果,达到无刷新效果,虽然没有Google的酷,但我相信,大家处理一下,采用层的显示是完全可以达到它的效果的.

using System.Drawing;
using System.Collections;
using System.Collections.Generic;
using ESRI.ArcGIS;
using ESRI.ArcGIS.ADF.Web;
using ESRI.ArcGIS.ADF.Web.DataSources;
using ESRI.ArcGIS.ADF.Web.Display.Graphics;
using ESRI.ArcGIS.ADF.Web.UI.WebControls;
using ESRI.ArcGIS.ADF.Web.UI.WebControls.Tools;
using System.Data;
using System;
using System.Web.UI.WebControls;
using System.Web.UI;


using ESRI.ArcGIS.ADF.Web.UI.WebControls;


using ESRI.ArcGIS.ADF.Web;
using ESRI.ArcGIS.ADF;

using ESRI.ArcGIS.ADF.Web.DataSources;
using ESRI.ArcGIS.ADF.Web.DataSources.ArcGISServer;
using ESRI.ArcGIS.ADF.Web.DataSources.Graphics;
using ESRI.ArcGIS.ADF.ArcGISServer;


using ESRI.ArcGIS.Geometry;
using ESRI.ArcGIS.Server;
using ESRI.ArcGIS.Geodatabase;

using ESRI.ArcGIS.ADF.Connection;

/**//// <summary>
/// MapIdentify 的摘要说明
/// </summary>
public class MapIdentify :IMapServerToolAction
{
    public MapIdentify()
    {
        //
        // TODO: 在此处添加构造函数逻辑
        //
    }

      IMapServerToolAction 成员#region IMapServerToolAction 成员

    public DataRow minus_row;

    public void ServerAction(ToolEventArgs args)
    {
        Map mapctrl = null;
        mapctrl = (Map)args.Control;

         IEnumerable func_enum = null;
        func_enum =mapctrl.GetFunctionalities();

        System.Data.DataTable datatable = null;
        PointN txt_Point = new PointN();


        //
        string name_eat = "null";
        

        foreach (ESRI.ArcGIS.ADF.Web.DataSources.IMapFunctionality gisfunctionality in func_enum)
        {
           

            //对特定的数据库图层进行查询
            if (gisfunctionality.Resource.Name == "CsMap")
            {
                ESRI.ArcGIS.ADF.Web.DataSources.IMapResource gResource;
                gResource = (ESRI.ArcGIS.ADF.Web.DataSources.IMapResource)gisfunctionality.Resource;



                bool supported = false;
                ESRI.ArcGIS.ADF.Web.DataSources.IGISResource gisresource = null;
                gisresource = gisfunctionality.Resource;
                supported = gisresource.SupportsFunctionality(typeof(ESRI.ArcGIS.ADF.Web.DataSources.IQueryFunctionality));

                //如果支持
                if (supported)
                {
                    ESRI.ArcGIS.ADF.Web.DataSources.IQueryFunctionality qfunc;
                    qfunc = (ESRI.ArcGIS.ADF.Web.DataSources.IQueryFunctionality)gisresource.CreateFunctionality(typeof(ESRI.ArcGIS.ADF.Web.DataSources.IQueryFunctionality), null);

                    string[] lids;
                    string[] lnames;

                    qfunc.GetQueryableLayers(null, out lids, out lnames);


                    //获取屏幕点
                    ESRI.ArcGIS.ADF.Web.Geometry.Point pnt = new ESRI.ArcGIS.ADF.Web.Geometry.Point() ;
                    ESRI.ArcGIS.ADF.Web.UI.WebControls.PointEventArgs ptargs = null;
                    ptargs = (PointEventArgs)args;
                   

                   pnt= ESRI.ArcGIS.ADF.Web.Geometry.Point.ToMapPoint(ptargs.ScreenPoint.X,ptargs.ScreenPoint.Y, mapctrl.Extent, (int)mapctrl.Width.Value, (int)mapctrl.Height.Value);
      


                    System.Data.DataTable[] qdatatables = qfunc.Identify(null, pnt, 1, ESRI.ArcGIS.ADF.Web.IdentifyOption.AllLayers, lids);

                    //将指点的图层的表格数据赋给表
                     datatable = qdatatables[3];//为饮食所在图层
                     double pnt_xy = pnt.X + pnt.Y;
                     double minus_xy = 0;
                     double add_xy;
                   
                     int first_row=0;   //判断是否是第一行,为0为第一行;为1表示为其他行;


                    获取点的坐标#region 获取点的坐标
                     DataRowCollection drs = datatable.Rows;

                    int shpind = -1;
                    for (int i = 0; i < datatable.Columns.Count; i++)
                    {
                        if (datatable.Columns[i].DataType == typeof(ESRI.ArcGIS.ADF.Web.Geometry.Geometry))
                        {
                            shpind = i;
                            break;
                        }
                    }

                    try
                    {
                        foreach (DataRow dr in drs)
                        {
                            //ESRI.ArcGIS.ADF.Web.Geometry.Multipoint geom = (ESRI.ArcGIS.ADF.Web.Geometry.Multipoint)dr[shpind];
                            //ESRI.ArcGIS.ADF.Web.Geometry.PointCollection pointcol = geom.Points;
                            //txt_Point.X = pointcol[0].X;
                            //txt_Point.Y = pointcol[0].Y;
                            ESRI.ArcGIS.ADF.Web.Geometry.Point geom = (ESRI.ArcGIS.ADF.Web.Geometry.Point)dr[shpind];
                            //add_xy=pointcol[0].X+pointcol[0].Y;
                            add_xy = geom.X + geom.Y;

                            if(first_row==0)
                            {
                                minus_xy = System.Math.Abs(add_xy-pnt_xy);
                                minus_row = dr;
                                first_row = 1;
                                name_eat = minus_row["餐饮店名称"].ToString();
                                
                            }
                            else if(System.Math.Abs(pnt_xy-add_xy)<minus_xy)
                            {
                                minus_xy = System.Math.Abs(pnt_xy - add_xy);
                                minus_row = dr;
                                name_eat = minus_row["餐饮店名称"].ToString();

                            }

                          

                        }
                    }
                    catch (Exception q)
                    {
                    }

                    #endregion


                    if (gResource == null)
                        return;

                   //
                   
                  //  GridView gdview = (GridView)mapctrl.Page.FindControl("GridView1");
                    //TextBox txt_name = (TextBox)mapctrl.Page.FindControl("FloatingPanel9$Txt_Name");
                   
                    //设置图片
                    System.Web.UI.WebControls.Image Image1 = (System.Web.UI.WebControls.Image)mapctrl.Page.FindControl("Image1");
                    //Image1.ImageUrl = "~/Img/images_sk.jpg";//huogongdian
                    Image1.ImageUrl = "~/Img/huogongdian.jpg";
                    Image1.Visible = true;

                    //设置label

                    Label eat_name = (Label)mapctrl.Page.FindControl("eat_name");
                    eat_name.Text = "<br/><br/>&nbsp;&nbsp;&nbsp;&nbsp;餐饮名称：" + name_eat + "<br/>";
                    eat_name.Visible = true;
                    //
                    Label eat_cai = (Label)mapctrl.Page.FindControl("eat_cai");
                    eat_cai.Text = "<br/>&nbsp;&nbsp;&nbsp;&nbsp;特色菜系：" + minus_row["特色菜"].ToString() + "<br/>";
                    //
                    Label eat_demo = (Label)mapctrl.Page.FindControl("eat_demo");
                    eat_demo.Text = "<br/>&nbsp;&nbsp;&nbsp;&nbsp;详细介绍：" + minus_row["详细介绍"].ToString() + "<br/>"; 
                    //

                     Label eat_tel = (Label)mapctrl.Page.FindControl("eat_tel");
                     eat_tel.Text = "<br/>&nbsp;&nbsp;&nbsp;&nbsp;订餐热线：" + minus_row["订餐热线"].ToString() + "<br/>";

                     Label eat_recom = (Label)mapctrl.Page.FindControl("eat_recom");
                     eat_recom.Text = "<br/>&nbsp;&nbsp;&nbsp;&nbsp;推荐指数：" + minus_row["推荐数"].ToString() + "<br/>"; 

                    
                    object[] oa = new object[1];
                    string showtable = "'visible'";
                    
                    //设置数据源
                   // gdview.DataSource = datatable;
                    //gdview.DataBind();
                  //  txt_name.Text = datatable.Rows[0]["NAME"].ToString();
                   // txt_name.Visible = true;
                    string returnstring = null;

                    using (System.IO.StringWriter sw = new System.IO.StringWriter())
                    {
                        HtmlTextWriter htw = new HtmlTextWriter(sw);
                     //   txt_name.RenderControl(htw);
                       // gdview.RenderControl(htw);
                        Image1.RenderControl(htw);
                        eat_name.RenderControl(htw);
                        eat_cai.RenderControl(htw);
                       
                        eat_tel.RenderControl(htw);
                        eat_demo.RenderControl(htw);

                        htw.Flush();
                        returnstring = sw.ToString();
                    }

                    CallbackResult cr = new CallbackResult("div", "identify", "innercontent", returnstring);
                    mapctrl.CallbackResults.Add(cr);
                    CallbackResult cr1 = new CallbackResult("div", "img_div", "innercontent", returnstring);
                    mapctrl.CallbackResults.Add(cr1);
                    CallbackResult cr2 = new CallbackResult("div", "img_lab", "innercontent", returnstring);
                    mapctrl.CallbackResults.Add(cr2);

                    if (datatable.Rows.Count > 0)
                    {
                        showtable = "'visible'";
                        
                    }
                    else
                    {
                        showtable = "'hidden'";
                    }

                    // 设置griddiv是否显示
                    string sa = "var griddiv = document.getElementById('identify');";
                    sa += "griddiv.style.visibility = " + showtable + ";";
                    oa[0] = sa;

                    CallbackResult cr4 = new CallbackResult(null, null, "javascript", oa);
                    mapctrl.CallbackResults.Add(cr1);

                    if (mapctrl.ImageBlendingMode == ImageBlendingMode.WebTier)
                    {
                        mapctrl.Refresh();
                    }
                    else if (mapctrl.ImageBlendingMode == ImageBlendingMode.Browser)
                    {
                        mapctrl.RefreshResource(gResource.Name);
                    }
    
                }
            }
        }


                  

    }
      #endregion
}