form1.cs

基于ehotgis开发的嵌入式gis

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using Hotgis.eHotGIS;

namespace SqlQuery
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void menuItem2_Click(object sender, EventArgs e)
        {
            // 在index=1的图层中查询字段名称为“酒店”的记录，并且高亮显示出来
            eQueryDefn query = new eQueryDefn();
            query.WhereClause = "名称 like '%酒店%'";
            eResultSet rs = eMap1.GetLayerAt(1).Query(query);
            string s = "";
            while (rs.IsHasNext)
            {
                s = rs.GetString(0);
                ePoint2D pt = rs.GetGeometry().GetPointAt(0);
            }
            eMap1.GetSelection().Add(rs);
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            //注意，地图相关文件不要放中文目录下，否则无法进行sql查询！
            eMap1.Open(@"\program files\sqlQuery\map\Test.map");
            eMap1.ViewEntire();
            eMap1.ReDraw();
            eMap1.Invalidate();

        }
    }
}