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 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());
}
}
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);
}