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 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;
}