private MG_FieldSet FieldSet; // same as Layer.FieldSet
#endregion Fields
#region Constructors
public MG_Feature(MG_FieldSet fs)
{
this.FieldSet = fs;
this.ValueSet = new MG_ValueSet();
this.Geometry = new MG_Geometry();
this.Symbol = new MG_Symbol();
}
public MG_Feature(MG_Feature f)
{
this.FieldSet = new MG_FieldSet();
this.ValueSet = new MG_ValueSet();
this.Geometry = new MG_Geometry();
this.Symbol = new MG_Symbol();
for (int i = 0; i < f.GetFieldCount();i++ )
{
MG_Field field = f.GetFieldSet().GetAt(i);
MG_Field newField = new MG_Field(field);
this.FieldSet.Add(newField);
MG_Value value = f.GetValue(i);
MG_Value newValue = new MG_Value(value);
this.ValueSet.Add(newValue);
}
MG_Geometry g = f.GetGeometry();
MG_Geometry newGeom = new MG_Geometry();
switch (g.Type)
{
case MG_GeometryType.NONE:
break;
case MG_GeometryType.POINT:
newGeom = new MG_Point(g as MG_Point);
break;
case MG_GeometryType.MULTIPOINT:
newGeom = new MG_MultiPoint(g as MG_MultiPoint);
break;
case MG_GeometryType.LINESTRING:
newGeom = new MG_LineString(g as MG_LineString);
break;
case MG_GeometryType.MULTILINESTRING:
newGeom = new MG_MultiLineString(g as MG_MultiLineString);
break;
case MG_GeometryType.POLYGON:
newGeom = new MG_Polygon(g as MG_Polygon);
break;
case MG_GeometryType.MULTIPOLYGON:
newGeom = new MG_MultiPolygon(g as MG_MultiPolygon);
break;
}
this.Geometry = newGeom;
MG_Symbol newSymbol = new MG_Symbol(f.GetSymbol());
this.Symbol = newSymbol;
}
public int Insert(string table, MG_ValueSet valueSet, MG_Geometry geometry)
{
this.sql_Insert(table, valueSet, geometry, out m_strSQL, out m_sqlParams);
return this.RunSQL(m_strConn, m_strSQL, m_sqlParams);
}
private void sql_Insert(string table, MG_ValueSet valueSet, MG_Geometry geometry, out string strSQL, out NpgsqlParameter[] sqlParams)
{
// oid, field1, field2, field3, field4,...fieldN, geom
// INSERT INTO point(f1, f2, f3, geom) VALUES('v1', 'v2', 'v3', ST_GeometryFromText('POINT (100 200)',0));
string str1 = "INSERT INTO {0}(";
str1 = String.Format(str1, table);
// oid name geom cityno length
// name cityno length
ArrayList columns = this.GetTableColumnNames(table);
string str2 = "";
string str4 = "";
if (columns!= null && valueSet!=null)
{
string temp1 = "{0}, ";
string temp2 = "'{0}', ";
int countField = columns.Count; //5
int countValue = valueSet.Count(); // 3
if (countField-2 == countValue) // oid geom
{
for (int i = 0; i < countField; i++)
{
string column = columns[i].ToString();
if (!column.Equals("oid") && !column.Equals("geom"))
{
str2 += String.Format(temp1, column);
}
}
for (int j = 0; j < countValue;j++ )
{
str4 += String.Format(temp2, valueSet.GetAt(j).Value);
}
}
}
string str3 = "geom) VALUES(";
string str5 = "ST_GeometryFromText('{0}',0));";
str5 = String.Format(str5, geometry.AsWKT());
strSQL = str1+str2+str3+str4+str5;
sqlParams = null;
}
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;
}