private void 打开shp文件ToolStripMenuItem_Click(object sender, EventArgs e)
{
DialogResult dr = this.openFileDialog1.ShowDialog();
if (dr == DialogResult.OK)
{
BinaryReader br = new BinaryReader(openFileDialog1.OpenFile());
//读取文件过程
br.ReadBytes(24);
int FileLength = br.ReadInt32();//<0代表数据长度未知
int FileBanben = br.ReadInt32();
ShapeType = br.ReadInt32();
xmin = br.ReadDouble();
ymax = -1 * br.ReadDouble();
xmax = br.ReadDouble();
ymin = -1 * br.ReadDouble();
double width = xmax - xmin;
double height = ymax - ymin;
n1 = (float)(this.pictureBox1.Width * 0.9 / width); //x轴放大倍数
n2 = (float)(this.pictureBox1.Height * 0.9 / height); //y轴放大倍数
br.ReadBytes(32);
switch (ShapeType)
{
case 1:
points.Clear();
while (br.PeekChar() != -1)
{
Point_shape point = new Point_shape();
uint RecordNum = br.ReadUInt32();
int DataLength = br.ReadInt32();
//读取第i个记录
br.ReadInt32();
point.X = br.ReadDouble();
point.Y = -1 * br.ReadDouble();
points.Add(point);
}
StreamWriter sw = new StreamWriter("point.txt");
foreach (Point_shape p in points)
{
sw.WriteLine("{0},{1},{2} ", p.X, -1 * p.Y, 0);
}
sw.Close();
break;
case 3:
polylines.Clear();
while (br.PeekChar() != -1)
{
PolyLine_shape polyline = new PolyLine_shape();
polyline.Box = new double[4];
polyline.Parts = new ArrayList();
polyline.Points = new ArrayList();
uint RecordNum = br.ReadUInt32();
int DataLength = br.ReadInt32();
//读取第i个记录
br.ReadInt32();
polyline.Box[0] = br.ReadDouble();
polyline.Box[1] = br.ReadDouble();
polyline.Box[2] = br.ReadDouble();
polyline.Box[3] = br.ReadDouble();
polyline.NumParts = br.ReadInt32();
polyline.NumPoints = br.ReadInt32();
for (int i = 0; i < polyline.NumParts; i++)
{
int parts = new int();
parts = br.ReadInt32();
polyline.Parts.Add(parts);
}
for (int j = 0; j < polyline.NumPoints; j++)
{
Point_shape pointtemp = new Point_shape();
pointtemp.X = br.ReadDouble();
pointtemp.Y = -1 * br.ReadDouble();
polyline.Points.Add(pointtemp);
}
polylines.Add(polyline);
}
StreamWriter sw2 = new StreamWriter("line.txt");
count = 1;
foreach (PolyLine_shape p in polylines)
{
for (int i = 0; i < p.NumParts; i++)
{
int startpoint;
int endpoint;
if (i == p.NumParts - 1)
{
startpoint = (int)p.Parts[i];
endpoint = p.NumPoints;
}
else
{
startpoint = (int)p.Parts[i];
endpoint = (int)p.Parts[i + 1];
}
sw2.WriteLine("线" + count.ToString() + ":");
for (int k = 0, j = startpoint; j < endpoint; j++, k++)
{
Point_shape ps = (Point_shape)p.Points[j];
sw2.WriteLine(" {0},{1},{2} ", ps.X, -1 * ps.Y, 0);
}
count++;
}
}
sw2.Close();
break;
case 5:
polygons.Clear();
while (br.PeekChar() != -1)
{
Polygon_shape polygon = new Polygon_shape();
polygon.Parts = new ArrayList();
polygon.Points = new ArrayList();
uint RecordNum = br.ReadUInt32();
int DataLength = br.ReadInt32();
//读取第i个记录
int m = br.ReadInt32();
polygon.Box1 = br.ReadDouble();
polygon.Box2 = br.ReadDouble();
polygon.Box3 = br.ReadDouble();
polygon.Box4 = br.ReadDouble();
polygon.NumParts = br.ReadInt32();
polygon.NumPoints = br.ReadInt32();
for (int j = 0; j < polygon.NumParts; j++)
{
int parts = new int();
parts = br.ReadInt32();
polygon.Parts.Add(parts);
}
for (int j = 0; j < polygon.NumPoints; j++)
{
Point_shape pointtemp = new Point_shape();
pointtemp.X = br.ReadDouble();
pointtemp.Y = -1 * br.ReadDouble();
polygon.Points.Add(pointtemp);
}
polygons.Add(polygon);
}
StreamWriter sw1 = new StreamWriter("polygon.txt");
count = 1;
foreach (Polygon_shape p in polygons)
{
for (int i = 0; i < p.NumParts; i++)
{
int startpoint;
int endpoint;
if (i == p.NumParts - 1)
{
startpoint = (int)p.Parts[i];
endpoint = p.NumPoints;
}
else
{
startpoint = (int)p.Parts[i];
endpoint = (int)p.Parts[i + 1];
}
sw1.WriteLine("多边形" + count.ToString() + ":");
for (int k = 0, j = startpoint; j < endpoint; j++, k++)
{
Point_shape ps = (Point_shape)p.Points[j];
sw1.WriteLine(" {0},{1},{2} ", ps.X, -1 * ps.Y, 0);
}
count++;
}
}
sw1.Close();
break;
}
br.Close();
}
this.pictureBox1.Refresh();
}
private void pictureBox1_Paint(object sender, PaintEventArgs e)
{
PointF[] point;
switch (ShapeType)
{
case 1:
foreach (Point_shape p in points)
{
PointF pp = new PointF();
pp.X = (float)(10 + (p.X - xmin) * n1);
pp.Y = (float)(10 + (p.Y - ymin) * n2);
e.Graphics.DrawEllipse(pen, pp.X, pp.Y, 1.5f, 1.5f);
}
break;
case 3:
foreach (PolyLine_shape p in polylines)
{
for (int i = 0; i < p.NumParts; i++)
{
int startpoint;
int endpoint;
point = null;
if (i == p.NumParts - 1)
{
startpoint = (int)p.Parts[i];
endpoint = p.NumPoints;
}
else
{
startpoint = (int)p.Parts[i];
endpoint = (int)p.Parts[i + 1];
}
point = new PointF[endpoint - startpoint];
for (int k = 0, j = startpoint; j < endpoint; j++, k++)
{
Point_shape ps = (Point_shape)p.Points[j];
point[k].X = (float)(10 + (ps.X - xmin) * n1);
point[k].Y = (float)(10 + (ps.Y - ymin) * n2);
}
e.Graphics.DrawLines(pen, point);
}
}
break;
case 5:
foreach (Polygon_shape p in polygons)
{
for (int i = 0; i < p.NumParts; i++)
{
int startpoint;
int endpoint;
point = null;
if (i == p.NumParts - 1)
{
startpoint = (int)p.Parts[i];
endpoint = p.NumPoints;
}
else
{
startpoint = (int)p.Parts[i];
endpoint = (int)p.Parts[i + 1];
}
point = new PointF[endpoint - startpoint];
for (int k = 0, j = startpoint; j < endpoint; j++, k++)
{
Point_shape ps = (Point_shape)p.Points[j];
point[k].X = (float)(10 + (ps.X - xmin) * n1);
point[k].Y = (float)(10 + (ps.Y - ymin) * n2);
}
e.Graphics.DrawPolygon(pen, point);
}
}
break;
}
}
