public static MG_Layer LoadShapeFile(string filePath)
{// xxx\line.shp
MG_Layer mgLayer = new MG_Layer();
try
{
Ogr.RegisterAll();
DataSource ds = Ogr.Open(filePath, 0);
Layer layer = ds.GetLayerByIndex(0);
mgLayer.SetLayerName(layer.GetName());
mgLayer.SetLayerType(AsGeometryType(layer.GetGeomType()));
Envelope ext = new Envelope();
layer.GetExtent(ext, 1);
mgLayer.Extent = AsExtent(ext); // collect data
mgLayer.FieldSet = AsFieldSet(layer.GetLayerDefn()); // collect data
int fc = layer.GetFeatureCount(1);
for (int fid = 0; fid < fc; fid++)
{
Feature f = layer.GetFeature(fid);
MG_Feature mgFeature = AsFeature(f);
mgLayer.AddFeature(mgFeature);// collect data
}
}
catch (Exception err)
{
MessageBox.Show(err.ToString());
}
return(mgLayer);
}
public void ImportLayer(MG_Layer layer)
{
if (layer == null)
{
return;
}
// stop multi same data
if (this.IsTableExist(layer.GetLayerName()))
{
return;
}
this.CreateTable(layer.FieldSet, layer.Type);
string layerName = layer.FieldSet.GetName();
int fc = layer.GetFeatureCount();
// save ext
this.CreateTableExt();
this.InsertExtent(layerName, layer.Extent);
for (int i = 0; i < fc; i++)
{
MG_Feature f = layer.GetFeature(i);
if (f.Geometry.Type == layer.Type)
{
this.Insert(layerName, f.ValueSet, f.Geometry);
}
}
}
public static void CreateMap(MG_Map map, string mapPath)
{// c:\\data\\hello.map c:\\data\\layer.shp
if (map == null)
{
return;
}
// set MapPath
map.SetMapPath(mapPath);
// save map (layerCount n * layerPath)
int count = map.GetLayerCount();
StreamWriter sw = new StreamWriter(mapPath); // stream writer
sw.WriteLine(count); // layerCount
for (int i = 0; i < count; i++)
{
string mapFolder = Path.GetDirectoryName(mapPath);
MG_Layer layer = map.GetLayer(i);
string layerPath = mapFolder + "\\" + layer.GetLayerName() + ".shp";
CreateShapeFile(layer, layerPath); //save layer
sw.WriteLine(layerPath); // layerPath
}
sw.Close();
}
public static void RenderLayer(MG_Layer layer, MG_MapView mapview, Graphics g)
{
if (layer.GetVisible())
{
for (int i = 0; i < layer.GetFeatureCount(); i++)
{
RenderFeature(layer.GetFeature(i), mapview, g);
}
}
}
public static void CreateShapeFile(MG_Layer mgLayer, string filePath)
{
string dataSourceName = filePath;
string layerName = Path.GetFileNameWithoutExtension(filePath);
mgLayer.SetLayerPath(filePath);
try
{
Ogr.RegisterAll();
string driverName = "ESRI Shapefile";
Driver driver = Ogr.GetDriverByName(driverName);
if (File.Exists(dataSourceName))
{
//System.IO.File.Delete(dataSourceName);// only remove xxx.shp
driver.DeleteDataSource(dataSourceName);// reomve xxx.shp dbf shx
}
DataSource ds = driver.CreateDataSource(dataSourceName, new string[] { });
wkbGeometryType gt = TowkbGeometryType(mgLayer.Type);// retrieve data
Layer layer = ds.CreateLayer(layerName, null, gt, new string[] { });
// create three files xxx.shp xxx.dbf xxx.shx
// fieldset
int fieldCount = mgLayer.FieldSet.Count();
for (int i = 0; i < fieldCount; i++)
{
MG_Field field = mgLayer.FieldSet.GetAt(i);
FieldDefn def = ToFieldDefn(field);
layer.CreateField(def, 1);
}
// feature
int featureCount = mgLayer.GetFeatureCount();
for (int i = 0; i < featureCount; i++)
{
Feature f = ToFeature(mgLayer.GetFeature(i));
layer.CreateFeature(f);
f.Dispose();
}
// flush data to file
layer.Dispose();
ds.Dispose();
driver.Dispose();
}
catch (System.Exception ex)
{
MessageBox.Show(ex.ToString());
}
}
public MG_Layer ExportLayer(string table)
{
MG_Layer mgLayer = new MG_Layer();
mgLayer.SetLayerName(table);//
// read ext
mgLayer.Extent = this.GetExtent(table);
MG_FieldSet fieldSet = this.GetFieldSet(table);
mgLayer.FieldSet = fieldSet;// collect data
mgLayer.FeatureSet = this.GetFeatureSet(mgLayer.GetFieldSet(), table);
mgLayer.Type = mgLayer.FeatureSet.GetAt(0).Geometry.Type;
return(mgLayer);
}
public MG_BaseTool(MG_ToolType type, MG_Layer layer, MG_MapView mapview)
{
this.ToolType = type;
this.Layer = layer;
this.MapView = mapview;
if (layer != null)
{// pan tool: layer==null
this.Feature = new MG_Feature(this.Layer.GetFieldSet());
}
// empty point
this.FromPoint = Point.Empty;
this.ToPoint = Point.Empty;
this.Point3 = Point.Empty;
this.SelectRect = Rectangle.Empty;
}
private DataTable GetDataTable(MG_Layer layer)
{
// Create a new DataTable.
DataTable table = new DataTable(layer.GetLayerName());
// add oid
DataColumn oid_Column = new DataColumn("OID", Type.GetType("System.Int32"));
table.Columns.Add(oid_Column);
int i, j;
// Add the column
for (i = 0; i < layer.GetFieldSet().Count(); i++)
{
MG_Field field = layer.GetFieldSet().GetAt(i);
DataColumn column = new DataColumn(field.Name);
column.DataType = Type.GetType("System.String");
// Add the Column to the DataColumnCollection.
table.Columns.Add(column);
}
// Add the row
for (i = 0; i < layer.GetFeatureCount(); i++)
{
MG_Feature f = layer.GetFeature(i);
DataRow row = table.NewRow();
// add oid
row[0] = i + 1;
for (j = 0; j < f.GetFieldCount(); j++)
{
object value = f.GetValue(j).Value;
if (value != null)
{
row[j + 1] = value.ToString();
}
}
// Add the row to the DataRowCollection.
table.Rows.Add(row);
}
return(table);
}
public static MG_Map LoadMap(string mapPath)
{
string mapName = Path.GetFileNameWithoutExtension(mapPath);
MG_Map map = new MG_Map();
map.SetMapName(mapName);
map.SetMapPath(mapPath);
StreamReader sr = new StreamReader(mapPath); // stream reader
int count = Int32.Parse(sr.ReadLine()); // layerCount
for (int i = 0; i < count; i++)
{
string layerPath = sr.ReadLine(); // layerPath
MG_Layer layer = LoadShapeFile(layerPath);
map.AddLayer(layer);
}
sr.Close();
return(map);
}
public void ExportToFile(string table, string filePath)
{
MG_Layer layer = this.ExportLayer(table);
MG_ShapeFileOper.CreateShapeFile(layer, filePath);
}
public void ImportToDB(string filePath)
{
MG_Layer layer = MG_ShapeFileOper.LoadShapeFile(filePath);
this.ImportLayer(layer);
}
public void SetLayer(MG_Layer layer)
{
this.layer = layer;
}
public MG_ToolDrawPoint(MG_Layer layer, MG_MapView mapview)
: base(MG_ToolType.Tool_DrawPoint, layer, mapview)
{
this.MapPoint = new MG_Point();
}
protected bool IsStart = true; // start end
public MG_ToolDrawRectangle(MG_Layer layer, MG_MapView mapview)
: base(MG_ToolType.Tool_DrawRectangle, layer, mapview)
{
}
protected bool QuitEdit = false; //if quit edit linestring
public MG_ToolDrawDoubleLineString(MG_Layer layer, MG_MapView mapview)
: base(MG_ToolType.Tool_DrawDoubleLineString, layer, mapview)
{
this.LineString = new MG_LineString();
this.LineStringOther = new MG_LineString();
}
public MG_ToolDrawPolygon(MG_Layer layer, MG_MapView mapview)
: base(MG_ToolType.Tool_DrawPolygon, layer, mapview)
{
this.LineString = new MG_LineString();
this.Polygon = new MG_Polygon();
}