学会用C#文件读取的shp（shapefile格式）文件并在窗口绘制

学会用C#文件读取的shp（shapefile格式）文件并在窗口绘制，内加入说明文档

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace frmform
{
    public partial class frmform : Form
    {
        public frmform()
        {
            InitializeComponent();
        }
        string path;
        Graphics gc = null;
        polygonfile pg = new polygonfile();
        private void btnopen_Click(object sender, EventArgs e)
        {
            OpenFileDialog openflg = new OpenFileDialog();
            openflg.Filter = "*.shp|*.SHP";
            openflg.Multiselect = false;
            if (openflg.ShowDialog() == DialogResult.OK)
            {
                path = openflg.FileName;
                txtaddress.Text = path;
            }
            string s = pg.readfile(path);
            txtshow.Text = "共有多边形"   pg.PolygonNumber  "\n\t"  s;
            draw();
            
        }

        private void frmform_Load(object sender, EventArgs e)
        {
            gc = this.panel.CreateGraphics();

        }
        public void draw()
        {
            for (int i = 0; i < pg.PolygonNumber; i  )
            {
                PointF[] ps = pg.mpys[i].polygon.ToArray();
                pt(ps);
                gc.DrawPolygon(Pens.Red, ps);
            }
        }
        public void pt(params PointF[] pt)
        {
            for (int i = 0; i < pt.Length; i  )
            {
                pt[i].X = (float)((pt[i].X - pg.HBoundingBox[0]) / (pg.HBoundingBox[2] - pg.HBoundingBox[0]) * this.panel.Width);
                pt[i].Y = (float)((pg.HBoundingBox[3] - pt[i].Y) / (pg.HBoundingBox[3] - pg.HBoundingBox[1]) * this.panel.Height);
            }
        }
    }
}

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资源文件列表

frmform/frmform.sln , 911
frmform/frmform.suo , 16896
frmform/frmform/bin/Debug/frmform.exe , 13824
frmform/frmform/bin/Debug/frmform.pdb , 32256
frmform/frmform/bin/Debug/frmform.vshost.exe , 14328
frmform/frmform/bin/Debug/frmform.vshost.exe.manifest , 490
frmform/frmform/bin/Debug/js_╩╨╜τ.shp , 993376
frmform/frmform/Form1.cs , 1827
frmform/frmform/Form1.Designer.cs , 3531
frmform/frmform/Form1.resx , 5814
frmform/frmform/frmform.csproj , 3802
frmform/frmform/obj/Debug/frmform.csproj.FileListAbsolute.txt , 478
frmform/frmform/obj/Debug/frmform.csproj.GenerateResource.Cache , 847
frmform/frmform/obj/Debug/frmform.exe , 13824
frmform/frmform/obj/Debug/frmform.frmform.resources , 180
frmform/frmform/obj/Debug/frmform.pdb , 32256
frmform/frmform/obj/Debug/frmform.Properties.Resources.resources , 180
frmform/frmform/obj/Debug/ResolveAssemblyReference.cache , 2449
frmform/frmform/polygonfile.cs , 7974
frmform/frmform/Program.cs , 490
frmform/frmform/Properties/AssemblyInfo.cs , 1354
frmform/frmform/Properties/Resources.Designer.cs , 2864
frmform/frmform/Properties/Resources.resx , 5612
frmform/frmform/Properties/Settings.Designer.cs , 1092
frmform/frmform/Properties/Settings.settings , 249
RedShp.dll , 8192
╢┴╚íshp┤░┐┌╔Φ╝╞.doc , 45568