/// <summary>
/// Get the Well Known Text format that DbGeography supports. This is a little different from the Well Known Text that is output
/// by Microsoft.Data.Spatial.Geography types, so we can't just directly use that representation here.
/// </summary>
/// <param name="geography">Geography instance to convert to Well Known Text.</param>
/// <returns>Well Known Text for the specified geography instance.</returns>
private static string GetWellKnownText(Geography geography)
{
string extendedWKT = geography.ToString();
int semicolon = extendedWKT.IndexOf(';');
Assert.IsTrue(semicolon > 0, "Expected to find a semicolon in the extended WellKnownText output (using ToString) for the type {0}", geography.GetType());
return extendedWKT.Substring(semicolon + 1);
}
public static DbGeography ConvertFrom(Geography geo)
{
string geographyEwkt = geo.ToString();
int semicolon = geographyEwkt.IndexOf(';');
string geographyWkt = geographyEwkt.Substring(semicolon + 1);
return(DbGeography.FromText(geographyWkt, int.Parse(geo.CoordinateSystem.Id)));
}
/// <summary>
/// Converts a DbGeography to a Geography.
/// </summary>
/// <param name="geography">Geography instance to convert.</param>
/// <returns>New DbGeography instance representing the same value as <paramref name="geography"/>.</returns>
internal static DbGeography ConvertGeography(Geography geography)
{
// DbGeography supports a different WKT format than Geography, so need to strip off the SRID first
string geographyEWKT = geography.ToString();
int semicolon = geographyEWKT.IndexOf(';');
Debug.Assert(semicolon >= 0, "Expected to find a semicolon in the WKT format of Geography instance.");
string geographyWKT = geographyEWKT.Substring(semicolon + 1);
return DbGeography.FromText(geographyWKT, geography.CoordinateSystem.Id);
}
/// <summary>
/// Converts a DbGeography to a Geography.
/// </summary>
/// <param name="geography">Geography instance to convert.</param>
/// <returns>New DbGeography instance representing the same value as <paramref name="geography"/>.</returns>
internal static DbGeography ConvertGeography(Geography geography)
{
// DbGeography supports a different WKT format than Geography, so need to strip off the SRID first
string geographyEWKT = geography.ToString();
int semicolon = geographyEWKT.IndexOf(';');
Debug.Assert(semicolon >= 0, "Expected to find a semicolon in the WKT format of Geography instance.");
string geographyWKT = geographyEWKT.Substring(semicolon + 1);
return(DbGeography.FromText(geographyWKT, geography.CoordinateSystem.Id));
}
/// <summary>
/// This method stores the given box into the database
/// </summary>
/// <param name="box">Box to be saved</param>
/// <param name="insertedKmlId">The KmlId to connect this object to</param>
/// <param name="con">Sql connection</param>
/// <param name="tran">Sql transaction</param>
/// <returns>The database id which is assigned to the given box</returns>
protected static int?SaveLatLonBox(Geography box, int insertedKmlId, SqlConnection con, SqlTransaction tran)
{
#region Insert Geography
int?insertedGeographyId = null;
if (box != null)
{
SqlCommand saveGeographyCmd =
new SqlCommand(
" insert into Geographies(Geography, KmlId) " +
" values(geography::Parse('" + box.ToString() + "'), @KmlId);select scope_identity()", con, tran);
AddParameter(saveGeographyCmd, "KmlId", insertedKmlId, DbType.Int32);
insertedGeographyId = (int)((decimal)saveGeographyCmd.ExecuteScalar());
box.DbId = insertedGeographyId;
}
#endregion
#region Insert Lat Lon Box
SqlCommand saveLatLonBox =
new SqlCommand(
" insert into LatLonBoxes(BoxType, GeographyId, rotation, MinAlt, MaxAlt, AltitudeMode) " +
" values(@BoxType, @GeographyId, @rotation, @MinAlt, @MaxAlt, @AltitudeMode);select scope_identity()",
con, tran);
AddParameter(saveLatLonBox, "GeographyId", insertedGeographyId, DbType.Int32);
LatLonBox latLonBox = box as LatLonBox;
LatLonAltBox latLonAltBox = box as LatLonAltBox;
LatLonQuad latLonQuad = box as LatLonQuad;
string BoxType = "";
if (latLonBox != null)
{
BoxType = "LatLonBox";
AddParameter(saveLatLonBox, "rotation", latLonBox.Rotation, DbType.Double);
}
else
{
AddParameter(saveLatLonBox, "rotation", null, DbType.Double);
}
if (latLonAltBox != null)
{
BoxType = "LatLonAltBox";
AddParameter(saveLatLonBox, "MinAlt", latLonAltBox.MinAltitude, DbType.Double);
AddParameter(saveLatLonBox, "MaxAlt", latLonAltBox.MaxAltitude, DbType.Double);
AddParameter(saveLatLonBox, "AltitudeMode", latLonAltBox.AltitudeMode.ToString(), DbType.String);
}
else
{
AddParameter(saveLatLonBox, "MinAlt", null, DbType.Double);
AddParameter(saveLatLonBox, "MaxAlt", null, DbType.Double);
AddParameter(saveLatLonBox, "AltitudeMode", null, DbType.Double);
}
if (latLonQuad != null)
{
BoxType = "LatLonQuad";
}
AddParameter(saveLatLonBox, "BoxType", BoxType, DbType.String);
int?insertedLatLonBox = (int)((decimal)saveLatLonBox.ExecuteScalar());
#endregion
return(insertedLatLonBox);
}