private bool InitWorkingLayer()
{
MapInfo.Mapping.Map map = null;
// Get the map
if (MapInfo.Engine.Session.Current.MapFactory.Count == 0 ||
(map = MapInfo.Engine.Session.Current.MapFactory[MapControl1.MapAlias]) == null)
{
return(false);
}
// Make sure the Find layer's MemTable exists
MapInfo.Data.Table table = MapInfo.Engine.Session.Current.Catalog.GetTable(_workingLayerName);
if (table == null)
{
TableInfoMemTable ti = new TableInfoMemTable(_workingLayerName);
ti.Temporary = true;
// Add the Geometry column
Column col = new MapInfo.Data.GeometryColumn(map.GetDisplayCoordSys());
col.Alias = "obj";
col.DataType = MIDbType.FeatureGeometry;
ti.Columns.Add(col);
// Add the Style column
col = new MapInfo.Data.Column();
col.Alias = "MI_Style";
col.DataType = MIDbType.Style;
ti.Columns.Add(col);
table = MapInfo.Engine.Session.Current.Catalog.CreateTable(ti);
}
if (table == null)
{
return(false);
}
// Make sure the Find layer exists
MapInfo.Mapping.FeatureLayer layer = (MapInfo.Mapping.FeatureLayer)map.Layers[_workingLayerName];
if (layer == null)
{
layer = new MapInfo.Mapping.FeatureLayer(table, _workingLayerName, _workingLayerName);
map.Layers.Insert(0, layer);
}
if (layer == null)
{
return(false);
}
// Delete the find object. There should only be one object in this table.
(layer.Table as ITableFeatureCollection).Clear();
return(true);
}
private bool InitWorkingLayer()
{
MapInfo.Mapping.Map map = null;
// Get the map
if (MapInfo.Engine.Session.Current.MapFactory.Count == 0 ||
(map = MapInfo.Engine.Session.Current.MapFactory[MapControl1.MapAlias]) == null)
{
return false;
}
// Make sure the Find layer's MemTable exists
MapInfo.Data.Table table = MapInfo.Engine.Session.Current.Catalog.GetTable(_workingLayerName);
if (table == null)
{
TableInfoMemTable ti = new TableInfoMemTable(_workingLayerName);
ti.Temporary = true;
// Add the Geometry column
Column col = new MapInfo.Data.GeometryColumn(map.GetDisplayCoordSys());
col.Alias = "obj";
col.DataType = MIDbType.FeatureGeometry;
ti.Columns.Add(col);
// Add the Style column
col = new MapInfo.Data.Column();
col.Alias = "MI_Style";
col.DataType = MIDbType.Style;
ti.Columns.Add(col);
table = MapInfo.Engine.Session.Current.Catalog.CreateTable(ti);
}
if (table == null) return false;
// Make sure the Find layer exists
MapInfo.Mapping.FeatureLayer layer = (MapInfo.Mapping.FeatureLayer)map.Layers[_workingLayerName];
if (layer == null)
{
layer = new MapInfo.Mapping.FeatureLayer(table, _workingLayerName, _workingLayerName);
map.Layers.Insert(0, layer);
}
if (layer == null) return false;
// Delete the find object. There should only be one object in this table.
(layer.Table as ITableFeatureCollection).Clear();
return true;
}