public PolygonLayer()
{
elements = new List <Polygon>();
dataset = new PropertyDataSet();
type = LayerType.Polygon;
}
public PointLayer()
{
elements = new List <MPoint>();
dataset = new PropertyDataSet();
type = LayerType.Point;
}
public LineLayer()
{
elements = new List <Line>();
dataset = new PropertyDataSet();
type = LayerType.Line;
}
/// <summary>
/// 读取shapefile主程序
/// </summary>
/// <param name="filename"></param>
public static Layer readshpfile(string filename)
{
//Read dbf file
PropertyDataSet set = new PropertyDataSet();
set.New();
string path = Path.GetDirectoryName(filename) + "\\";
string name = Path.GetFileNameWithoutExtension(filename) + ".dbf";
OleDbConnection conn = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + path + ";Extended Properties=DBASE III;");
conn.Open();
string sqlStr = "Select * from " + name;
OleDbDataAdapter myAdapter = new OleDbDataAdapter(sqlStr, conn);
//Build the Update and Delete SQL Statements
OleDbCommandBuilder myBuilder = new OleDbCommandBuilder(myAdapter);
//Fill the DataSet with the Table 'bookstock'
myAdapter.Fill(set.table);
for (int i = 0; i < set.table.Rows.Count; i++)
{
set.table.Rows[i]["ID"] = i + 1;
}
conn.Close();
//Layer newlayer=new Layer();
FileStream sfilesream = new FileStream(filename, FileMode.Open);
BinaryReader br = new BinaryReader(sfilesream);
br.BaseStream.Seek(0, SeekOrigin.Begin);
uint filecode;
uint[] unused = new uint[5];
uint filelength;
int version;
int shapetype;
double Xmin;
double Ymin;
double Xmax;
double Ymax;
double Zmin;
double Zmax;
double Mmin;
double Mmax;
filecode = EndianConvert(br.ReadUInt32());
for (int i = 0; i < 5; i++)
{
unused[i] = EndianConvert(br.ReadUInt32());
}
filelength = EndianConvert(br.ReadUInt32());
version = br.ReadInt32();
shapetype = br.ReadInt32();
Xmin = br.ReadDouble();
Ymin = br.ReadDouble();
Xmax = br.ReadDouble();
Ymax = br.ReadDouble();
Zmin = br.ReadDouble();
Zmax = br.ReadDouble();
Mmin = br.ReadDouble();
Mmax = br.ReadDouble();
switch (shapetype)
{
case 0:
break;
case 1:
PointLayer pointslayer = new PointLayer();
//List<MPoint>points1=new List<MPoint>();
readPoint(pointslayer.elements, br);
pointslayer.dataset = set;
pointslayer.FindMinMax();
return(pointslayer);
case 3:
LineLayer linelayer = new LineLayer();
//List<PList> multiPointList = new List<PList>();
//Line lines = new Line(0,multiPointList);
readLine(linelayer.elements, br);
linelayer.dataset = set;
linelayer.FindMinMax();
return(linelayer);
case 5:
PolygonLayer polygonlayer = new PolygonLayer();
//List<PList> multiPointList5 = new List<PList>();
//Polygon polygons = new Polygon(0, multiPointList5);
readPolygon(polygonlayer.elements, br);
polygonlayer.dataset = set;
polygonlayer.FindMinMax();
return(polygonlayer);
case 8:
PointLayer pointslayer8 = new PointLayer();
//List<MPoint>points1=new List<MPoint>();
readPoint(pointslayer8.elements, br);
pointslayer8.dataset = set;
pointslayer8.FindMinMax();
return(pointslayer8);
case 11:
break;
case 13:
break;
case 15:
break;
case 18:
break;
case 21:
PointLayer pointslayer21 = new PointLayer();
//List<MPoint>points1=new List<MPoint>();
readPoint(pointslayer21.elements, br);
pointslayer21.dataset = set;
pointslayer21.FindMinMax();
return(pointslayer21);
case 23:
break;
case 25:
break;
case 28:
PointLayer pointslayer28 = new PointLayer();
//List<MPoint>points1=new List<MPoint>();
readPoint(pointslayer28.elements, br);
pointslayer28.dataset = set;
pointslayer28.FindMinMax();
return(pointslayer28);
case 31:
break;
}
br.Close();
sfilesream.Close();
return(null);
}
