private string sql_CreateTable(MG_FieldSet fieldSet, MG_GeometryType gt)
{// oid, field1, field2, field3, field4,...fieldN, geom
//CREATE TABLE point2 ( oid SERIAL PRIMARY KEY, name1 VARCHAR, name2 VARCHAR); SELECT AddGeometryColumn('public','point2','geom',0,'POINT',2);
// table name, column name must be lowercase, e.g. pointTABLE --->pointtable
string front = "CREATE TABLE {0} ( oid SERIAL PRIMARY KEY";
string table = fieldSet.GetName().ToLower();
front = String.Format(front, table);
string m = ", {0} {1}";
string mid = "";
for (int i = 0; i < fieldSet.Count(); i++)
{
MG_Field field = fieldSet.GetAt(i);
mid += String.Format(m, field.Name.ToLower(), field.Type.ToString());
}
string end = "); SELECT AddGeometryColumn('public','{0}','geom',0,'{1}',2);";
end = String.Format(end, table, gt.ToString());
string strSQL = front + mid + end;
return(strSQL);
}
protected MG_FeatureSet GetFeatureSet(MG_FieldSet fieldSet, string table)
{
NpgsqlDataReader reader = this.SelectAll(table);
if (reader == null || !reader.HasRows)
{
return(null);
}
MG_FeatureSet featureSet = new MG_FeatureSet();
int fc = reader.FieldCount; // 4
while (reader.Read())
{// oid f1,f2,f3... geom
MG_Feature f = new MG_Feature(fieldSet);
MG_ValueSet valueSet = new MG_ValueSet();
string oid = reader["oid"].ToString();
string geom = reader["geomtext"].ToString();
for (int i = 1; i < fc - 1; i++)
{
string str = reader[i].ToString();
MG_Value value = new MG_Value(i - 1, str);
valueSet.Add(value);
}
f.ValueSet = valueSet;
f.Geometry = MG_ShapeFileOper.AsGeometry(geom);
featureSet.Add(f);
}
reader.Close();
reader.Dispose();
return(featureSet);
}
public int CreateTable(MG_FieldSet fieldSet, MG_GeometryType gt)
{
if (this.IsTableExist(fieldSet.GetName()))
{
return(0);
}
this.sql_CreateTable(fieldSet, gt, out m_strSQL, out m_sqlParams);
return(this.RunSQL(m_strConn, m_strSQL, m_sqlParams));
}
public int CreateTable(MG_FieldSet fieldSet, MG_GeometryType gt)
{
if (this.IsTableExist(fieldSet.GetName()))
{
return(0);
}
string strSQL = this.sql_CreateTable(fieldSet, gt);
return(this.Run(strSQL));
}
public static MG_Feature AsFeature(Feature f)
{
FeatureDefn def = f.GetDefnRef();
MG_FieldSet fieldSet = AsFieldSet(def);
MG_Feature mgFeature = new MG_Feature(fieldSet);//collect data
// geometry
Geometry g = f.GetGeometryRef();
MG_Geometry geometry = AsGeometry(g);
string wkt = geometry.AsWKT(); // Test
mgFeature.SetGeometry(geometry); //collect data
// symbol
string styleString = f.GetStyleString();
//f.SetStyleString(styleString);
// attribute value
MG_ValueSet valueSet = new MG_ValueSet();
int fid = f.GetFID();
int nFieldCount = f.GetFieldCount();
for (int iField = 0; iField < nFieldCount; iField++)
{
FieldDefn fdef = def.GetFieldDefn(iField);
FieldType fieldType = fdef.GetFieldType();//OFTInteger OFTString OFTString
MG_Value mgValue = new MG_Value();
mgValue.Index = iField;// collect data
//collect data
if (fieldType == FieldType.OFTString)
{
mgValue.Value = f.GetFieldAsString(iField);
}
else if (fieldType == FieldType.OFTInteger)
{
mgValue.Value = f.GetFieldAsInteger(iField);
}
else if (fieldType == FieldType.OFTReal)
{
mgValue.Value = f.GetFieldAsDouble(iField);
}
else if (fieldType == FieldType.OFTDateTime)
{
int year, month, day, hour, minute, second, flag;
f.GetFieldAsDateTime(iField, out year, out month, out day, out hour, out minute, out second, out flag);
mgValue.Value = new DateTime(year, month, day, hour, minute, second, flag);
}
valueSet.Add(mgValue);
}
mgFeature.ValueSet = valueSet;//collect data
return(mgFeature);
}
public static FeatureDefn ToFeatureDefn(MG_FieldSet fieldSet)
{
FeatureDefn def = new FeatureDefn(null);
for (int i = 0; i < fieldSet.Count(); i++)
{
MG_Field field = fieldSet.GetAt(i);
FieldDefn fdef = ToFieldDefn(field);
def.AddFieldDefn(fdef);
}
return(def);
}
public static MG_FieldSet AsFieldSet(FeatureDefn f)
{
MG_FieldSet fieldSet = new MG_FieldSet(f.GetName());// name
int count = f.GetFieldCount();
for (int i = 0; i < count; i++)
{
MG_Field field = AsField(f.GetFieldDefn(i));
fieldSet.Add(field);
}
return(fieldSet);
}
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);
}
protected MG_FieldSet GetFieldSet(string table)
{
ArrayList columns = this.GetColumnNames(table);
ArrayList types = this.GetColumnTypes(table);
if (columns == null || types == null)
{
return(null);
}
int columnCount = columns.Count;
int typeCount = types.Count;
if (columnCount != typeCount)
{
return(null);
}
MG_FieldSet fieldSet = new MG_FieldSet(table);
// oid .... geom
for (int i = 0; i < columnCount; i++)
{
string column = columns[i].ToString();
string type = types[i].ToString();
if (!column.Equals("oid") && !column.Equals("geom"))
{
// oid name geom no length
// integer character varying USER-DEFINED integer double precision
MG_FieldDBType dbType = MG_FieldDBType.VARCHAR;
if (type.Equals("integer"))
{
dbType = MG_FieldDBType.INTEGER;
}
else if (type.Equals("character varying"))
{
dbType = MG_FieldDBType.VARCHAR;
}
else if (type.Equals("double precision"))
{
dbType = MG_FieldDBType.FLOAT8;
}
MG_Field field = new MG_Field(column, dbType);
fieldSet.Add(field);
}
}
return(fieldSet);
}