supermap查询后填充DIV并有事件ONCLICK处理点击查询结果

  这个程序是照着开发文档做的，不是很难，可第一次接触吧，在创建HTML字符串时整花了半天时间，终于忙完了，和源程序有不少改动（改成加载长春的地图了，并且搜索的是单层），因为开始我做是照自己理解做的，把远程都改成自己能容易理解的语句了，呵呵，最需要注意的是s+="<td style=\"cursor:hand\" onClick=\"Result_X.value="+r.Center.X+";Result_Y.value="+r.Center.Y+";Result_Name.value=\\\'"+r.FieldValues[index].ToString()+"\\\';MapControl1_DoPostBack();\">&nbsp;&nbsp;"+r.FieldValues[index].ToString()+"</td></tr>";中间的那三个杠，现在也不明白为什么要有这三个杠？高手请指点！谢谢了

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

using SuperMap.IS.WebControls;
using SuperMap.IS.Utility;

namespace test
{
    /**//// <summary>
    /// supermapdivchaxun 的摘要说明。
    /// </summary>
    public class supermapdivchaxun : System.Web.UI.Page
    {
        protected System.Web.UI.WebControls.TextBox TextBox1;
        protected SuperMap.IS.WebControls.MapControl MapControl1;
        protected System.Web.UI.WebControls.Button Button1;
    
        private void Page_Load(object sender, System.EventArgs e)
        {
            if(!Page.IsPostBack)
            {
                this.TextBox1.Text="伪皇宫";
            }    
            else
            {
                string x=this.Page.Request.Params["Result_X"];
                string y=this.Page.Request.Params["Result_Y"];
                string n=this.Page.Request.Params["Result_Name"];
                if(x!=null&&y!=null&&n!=null)
                {
                    MapCoord mapCenter=new MapCoord(Double.Parse(x),Double.Parse(y));
                    this.MapControl1.Zoom(mapCenter,1.0);
                    this.MapControl1.CustomLayer.Divs.Insert("ball",Double.Parse(x),Double.Parse(y),"<a target='_blank' href='url' title='"+n+"'><img border=0 src='images/hotball.gif'></a>");
                    this.MapControl1.CustomLayer.Visible=true;
                }
            }
         }
        
        public void Show(ResultSet rs)
        {
            if(rs==null||rs.Recordsets==null||rs.Recordsets.Length<=0||rs.TotalCount<=0)
            {
                Response.Write("<script>alert(\"not find!\");</script>");
                return;
            }
            if(Page.IsStartupScriptRegistered("s"))
            {
                return;
            }
            Session["ResultSet"]=rs;
            int tableCount=rs.Recordsets.Length;
            string s="<script language='javascript'>var strTable='<input type=hidden name=Result_X ><input type=hidden name=Result_Y ><input type=hidden name=Result_Name >";
            Recordset curRecordset;
            for(int i=0;i<tableCount;i++)
            {
                curRecordset=rs.Recordsets[i];
                s+="<table style=\"BORDER-LEFT-COLOR: lightgreen; BORDER-BOTTOM-COLOR: lightgreen; BORDER-TOP-STYLE: ridge; BORDER-TOP-COLOR: lightgreen; BORDER-RIGHT-STYLE: ridge; BORDER-LEFT-STYLE: ridge; BORDER-RIGHT-COLOR: lightgreen; BORDER-BOTTOM-STYLE: ridge\">";
                int index=0;
                for(int j=0;j<curRecordset.ReturnFields.Length;j++)
                {
                    if(curRecordset.ReturnFields[j]=="name")
                    {
                        index=j;
                        break;
                    }
                }
                for(int j=0;j<curRecordset.Records.Length;j++)
                {
                    Record r=curRecordset.Records[j];
                    s+="<tr>";
                    if(r.Center!=null)
                    {
                        s+="<td style=\"cursor:hand\" onClick=\"Result_X.value="+r.Center.X+";Result_Y.value="+r.Center.Y+";Result_Name.value=\\\'"+r.FieldValues[index].ToString()+"\\\';MapControl1_DoPostBack();\">&nbsp;&nbsp;"+r.FieldValues[index].ToString()+"</td></tr>";
                    }
                    else
                    {
                        s+="</tr>";
                    }
                    
                }
                s+="</table>'";
            }
            s+=";var divQueryResult=document.getElementById('DivQueryResult');if(divQueryResult!=null){    divQueryResult.innerHTML=strTable;}</script>";
            if(!Page.IsStartupScriptRegistered("s"))
            {
                Page.RegisterStartupScript("sInCurrentWindow",s);
            }
        }


        Web 窗体设计器生成的代码#region Web 窗体设计器生成的代码
        override protected void OnInit(EventArgs e)
        {
            //
            // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
            //
            InitializeComponent();
            base.OnInit(e);
        }
        
        /**//// <summary>
        /// 设计器支持所需的方法 - 不要使用代码编辑器修改
        /// 此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {    
            this.Button1.Click += new System.EventHandler(this.Button1_Click);
            this.Load += new System.EventHandler(this.Page_Load);
//            this.PreRender += new System.EventHandler(this.supermapdivchaxun_PreRender);

        }
        #endregion

        private void Button1_Click(object sender, System.EventArgs e)
        {
            QueryParam q=new QueryParam();
            q.IsAllLayer=false;
            q.Layers=new QueryLayer[1];
            q.Layers[0]=new QueryLayer();
            q.Layers[0].Name="Park@changchun";

            q.ReturnFields=new string[2];
            q.ReturnFields[0]="SMID";
            q.ReturnFields[1]="name";
            q.Layers[0].WhereClause="name like '*"+this.TextBox1.Text.ToString().Trim()+"*'";
            ResultSet rs=MapControl1.QueryBySQL(q);
            Show(rs);
        }
        
//        private void supermapdivchaxun_PreRender(object sender, System.EventArgs e)
//        {
//            // 显示上次的SQL查询结果 ,用于保持查询结果状态
//            object o = Session["ResultSet"];
//            if(o != null)
//            {
//                SuperMap.IS.Utility.ResultSet resultSet = (ResultSet)o;
//                if(resultSet != null)
//                {
//                    Show(resultSet);
//                }
//            }
//        }
    }
}