private static void WritePolygonRecord(string path, List <Shape> shapes)
{
using (FileStream fs = new FileStream(path, FileMode.Append))
{
FileWriter fw = new FileWriter(fs);
Dictionary <int, int> index = new ShxFile(path.Replace(Path.GetExtension(path), "") + ".shx").ReadContent();
int number = 0;
foreach (var item in index)
{
fw.WriteReverseInt(item.Key, ++number);
fw.WriteReverseInt(item.Key + 4, item.Value);
fw.WriteInt(item.Key + 8, 3);
BoundingBox box = BoundingBox.GetBoundingBox(shapes[number - 1]);
fw.WriteDouble(item.Key + 12, box.XMin);
fw.WriteDouble(item.Key + 20, box.XMax);
fw.WriteDouble(item.Key + 28, box.YMin);
fw.WriteDouble(item.Key + 36, box.YMax);
fw.WriteInt(item.Key + 44, 1);
fw.WriteInt(item.Key + 48, shapes[number - 1].Vertexes.Count);
fw.WriteInt(item.Key + 52, 0);
for (int i = 0; i < shapes[number - 1].Vertexes.Count; i++)
{
fw.WriteDouble(item.Key + 56 + i * 16, shapes[number - 1].Vertexes[i].X);
fw.WriteDouble(item.Key + 64 + i * 16, shapes[number - 1].Vertexes[i].Y);
}
}
}
}
/// <summary>
/// Initialize Shapefile class using existing .shp and .shx file.
/// </summary>
public Shapefile(string directory, string name)
{
this.FilePath = directory + "\\" + name;
string shxPath = this.FilePath + ".shx";
ShxFile shxFile = new ShxFile(shxPath);
Dictionary <int, int> indexes = shxFile.ReadContent();
string shpPath = this.FilePath + ".shp";
ShpFile shpFile = new ShpFile(shpPath);
this.Box = shpFile.ReadBoundingBox();
this.shapes = shpFile.ReadShapes(indexes);
}
/// <summary>
/// Save the Shapefile as .shp and .shx files.
/// </summary>
/// <param name="directory"></param>
/// <param name="name"></param>
/// <returns></returns>
public bool Save(string directory, string name)
{
if (string.IsNullOrEmpty(directory) || string.IsNullOrEmpty(name))
{
return(false);
}
else
{
this.FilePath = directory + "\\" + name;
string shxPath = this.FilePath + ".shx";
ShxFile.Save(shxPath, Box, shapes);
string shpPath = this.FilePath + ".shp";
ShpFile.Save(shpPath, Box, shapes);
return(true);
}
}
