/// <summary>${Mapping_MBTilesLayer_method_Initialize_D}</summary>
public override async void Initialize()
{
if (!_isInitializing&&!IsInitialized&&!string.IsNullOrEmpty(MBTilesPath))
{
_parameter = await MBTilesHelper.GetMBTilesParameter(MBTilesPath);
this.Resolutions = _parameter.Resolutions;
this.Bounds = _parameter.Bounds;
this.Origin = _parameter.Origin;
this.TileSize = _parameter.TileHeight;
if (_parameter.WKID > 0)
{
this.CRS = new Core.CoordinateReferenceSystem(_parameter.WKID);
}
base.Initialize();
}
}
public static async Task<MBTilesParameters> GetMBTilesParameter(string path)
{
MBTilesParameters parameter = null;
try
{
parameter = new MBTilesParameters();
SQLiteAsyncConnection connection = new SQLiteAsyncConnection(path);
AsyncTableQuery<MBTilesInfoTable> table = connection.Table<MBTilesInfoTable>();
List<MBTilesInfoTable> list = await table.ToListAsync();
Dictionary<string, MBTilesInfoTable> paramDic = list.ToDictionary<MBTilesInfoTable, string>(c => c.Name);
parameter.Bounds = StringToRectangle2D(paramDic["bounds"].Value);
bool compatible = false;
bool.TryParse(paramDic["compatible"].Value, out compatible);
parameter.Compatible = compatible;
parameter.Description = paramDic["description"].Value;
FormatType format = FormatType.PNG;
Enum.TryParse<FormatType>(paramDic["compatible"].Value, out format);
parameter.Format = format;
MBTilesLayerType layertype = MBTilesLayerType.Overlay;
Enum.TryParse<MBTilesLayerType>(paramDic["type"].Value, out layertype);
parameter.LayerType = layertype;
parameter.MapParameter = paramDic["map_parameter"].Value;
parameter.Name = paramDic["name"].Value;
parameter.Origin = StringToPoint2D(paramDic["axis_origin"].Value);
PositiveDirection positiveDirection = PositiveDirection.RightDown;
Enum.TryParse<PositiveDirection>(paramDic["axis_positive_direction"].Value, out positiveDirection);
parameter.PositiveDirection = positiveDirection;
parameter.Resolutions = StringToDoubleArray(paramDic["resolutions"].Value).OrderByDescending(c=>c).ToArray();
parameter.Scales = StringToDoubleArray(paramDic["scales"].Value).OrderBy(c=>c).ToArray();
int height = 0;
int.TryParse(paramDic["tile_height"].Value, out height);
parameter.TileHeight = height;
int width = 0;
int.TryParse(paramDic["tile_width"].Value, out width);
parameter.TileHeight = width;
parameter.Version = paramDic["version"].Value;
int wkid = 0;
int.TryParse(paramDic["crs_wkid"].Value, out wkid);
parameter.WKID = wkid;
parameter.WKT = paramDic["crs_wkt"].Value;
}
catch (Exception ex)
{
}
return parameter;
}