BMap.NET.WindowsForm/MapDownloadDialog.cs

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using BMap.NET.HTTPService;
using System;
using System.Collections;
using System.Drawing;
using System.IO;
using System.Threading;
using System.Windows.Forms;

namespace BMap.NET.WindowsForm
{
    public partial class MapDownloadDialog : Form
    {
        private LatLngPoint p1; private LatLngPoint p2;
        private ArrayList _waittodownload = new ArrayList();  //待下载图片集合

        public MapDownloadDialog(LatLngPoint p1, LatLngPoint p2)
        {
            InitializeComponent();
            this.p1 = p1;
            this.p2 = p2;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            using (FolderBrowserDialog fb = new FolderBrowserDialog())
            {
                if (fb.ShowDialog() == System.Windows.Forms.DialogResult.OK)
                {
                    txtPath.Text = fb.SelectedPath;
                }
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            _path = txtPath.Text;
            if (_path.Equals(""))
            {
                MessageBox.Show("请选择存储路径！");
                return;
            }
            if (numZoom.Value > numZoomEnd.Value)
            {
                MessageBox.Show("地图级别设置不对！");
                return;
            }

            int zoomStart = (int)numZoom.Value;
            int zoomEnd = (int)numZoomEnd.Value;

            int thread = (int)numThread.Value;

            _waittodownload.Clear();
            for (int zoom = zoomStart; zoom <= zoomEnd; ++zoom)
            {
                PointF point1 = MapHelper.GetLocationByLatLng(p1, zoom); //将第一个点经纬度转换成平面2D坐标
                PointF point2 = MapHelper.GetLocationByLatLng(p2, zoom);  //将第二个点经纬度转换成平面2D坐标

                int startX = (int)point1.X / 256;  //起始列
                int endX = (int)point2.X / 256;   //结束列