// Save the state
public override void SaveState()
{
string mapAlias = ParamsDictionary[ActiveMapAliasKey] as string;
Map map = GetMapObj(mapAlias);
if (map == null)
{
return;
}
SaveZoomCenterState(map);
//ManualSerializer.SaveMapXtremeObjectIntoHttpSession(map.Layers, "Layers");
ManualSerializer.SaveMapXtremeObjectIntoHttpSession(MapInfo.Engine.Session.Current.Selections.DefaultSelection, GetKey("Selection"));
// Needs this because StateManger doens't have proper function to save them.
// Need to serialize the temp table first since the temp layer is based on it.
if (StateManager.IsManualState())
{
MapInfo.Mapping.FeatureLayer fLyr = (MapInfo.Mapping.FeatureLayer)map.Layers[Constants.TempLayerAlias];
MapInfo.Data.Table tbl = (fLyr != null) ? fLyr.Table : null;
if (fLyr != null)
{
ManualSerializer.SaveMapXtremeObjectIntoHttpSession(tbl, "tempTable");
ManualSerializer.SaveMapXtremeObjectIntoHttpSession(fLyr, "tempLayer");
}
}
}
// Creates a simple theme using the default values
private void SimpleTheme(Map map)
{
// Get table from the feature layer
MapInfo.Mapping.FeatureLayer mexicoLayer = map.Layers["mexico"] as MapInfo.Mapping.FeatureLayer;
MapInfo.Data.Table mexicoTable = mexicoLayer.Table;
// Create the theme
GraduatedSymbolTheme theme = new GraduatedSymbolTheme(mexicoTable, "Pop_90");
// Create the theme layer
ObjectThemeLayer themeLayer = new ObjectThemeLayer("Population1990", "Population1990", theme);
// Add theme layer to the map
map.Layers.Add(themeLayer);
}
// Creates a theme with a non-default symbol
private void CustomPositiveSymbolTheme(Map map)
{
// Get table from the feature layer
MapInfo.Mapping.FeatureLayer mexicoLayer = map.Layers["mexico"] as MapInfo.Mapping.FeatureLayer;
MapInfo.Data.Table mexicoTable = mexicoLayer.Table;
// Create the theme
GraduatedSymbolTheme theme = new GraduatedSymbolTheme(mexicoTable, "Pop_90");
// Replace the default symbol of the theme
theme.PositiveSymbol = new MapInfo.Styles.SimpleVectorPointStyle(35, Color.Blue, 36);
// Create the theme layer
ObjectThemeLayer themeLayer = new ObjectThemeLayer("Population1990", "Population1990", theme);
// Add theme layer to the map
map.Layers.Add(themeLayer);
}
// Creates a theme with a custom DataValueAtSize property
private void DataValueAtSizeTheme(Map map)
{
// Get table from the feature layer
MapInfo.Mapping.FeatureLayer mexicoLayer = map.Layers["mexico"] as MapInfo.Mapping.FeatureLayer;
MapInfo.Data.Table mexicoTable = mexicoLayer.Table;
// Create the theme
GraduatedSymbolTheme theme = new GraduatedSymbolTheme(mexicoTable, "Pop_90");
// Decreasing DataValueAtSize value will increase the size of the symbols.
theme.DataValueAtSize /= 4;
// Create the theme layer
ObjectThemeLayer themeLayer = new ObjectThemeLayer("Population1990", "Population1990", theme);
// Add theme layer to the map
map.Layers.Add(themeLayer);
}
// Creates a theme whose symbol sizes are graduated logarithmically
private void GraduateByLogTheme(Map map)
{
// Get table from the feature layer
MapInfo.Mapping.FeatureLayer mexicoLayer = map.Layers["mexico"] as MapInfo.Mapping.FeatureLayer;
MapInfo.Data.Table mexicoTable = mexicoLayer.Table;
// Create the theme
GraduatedSymbolTheme theme = new GraduatedSymbolTheme(mexicoTable, "Pop_90");
// Graduate the size logarithmically
theme.GraduateSizeBy = GraduateSizeBy.Log;
// Create the theme layer
ObjectThemeLayer themeLayer = new ObjectThemeLayer("Population1990", "Population1990", theme);
// Add theme layer to the map
map.Layers.Add(themeLayer);
}
protected void Page_Load(object sender, System.EventArgs e)
{
MapInfo.Mapping.Map myMap = GetMapObj();
if (Session.IsNewSession)
{
AppStateManager stateManager = new AppStateManager();
stateManager.ParamsDictionary[AppStateManager.ActiveMapAliasKey] = this.MapControl1.MapAlias;
MapInfo.WebControls.StateManager.PutStateManagerInSession(stateManager);
// Add customized web tools
// Below line will put controlModel into HttpSessionState.
MapInfo.WebControls.MapControlModel controlModel = MapControlModel.SetDefaultModelInSession();
controlModel.Commands.Add(new AddPinPointCommand());
controlModel.Commands.Add(new ClearPinPointCommand());
controlModel.Commands.Add(new ModifiedRadiusSelectionCommand());
/****** Set the initial state of the map *************/
// Clear up the temp layer left by other customer requests.
if (myMap != null)
{
if (myMap.Layers[SampleConstants.TempLayerAlias] != null)
{
myMap.Layers.Remove(SampleConstants.TempLayerAlias);
}
}
// Need to clean up "dirty" temp table left by other customer requests.
MapInfo.Engine.Session.Current.Catalog.CloseTable(SampleConstants.TempTableAlias);
// Need to clear the DefautlSelection.
MapInfo.Engine.Session.Current.Selections.DefaultSelection.Clear();
// Creat a temp table and AddPintPointCommand will add features into it.
MapInfo.Data.TableInfoMemTable ti = new MapInfo.Data.TableInfoMemTable(SampleConstants.TempTableAlias);
// Make the table mappable
ti.Columns.Add(MapInfo.Data.ColumnFactory.CreateFeatureGeometryColumn(myMap.GetDisplayCoordSys()));
ti.Columns.Add(MapInfo.Data.ColumnFactory.CreateStyleColumn());
MapInfo.Data.Table table = MapInfo.Engine.Session.Current.Catalog.CreateTable(ti);
// Create a new FeatureLayer based on the temp table, so we can see the temp table on the map.
myMap.Layers.Insert(0, new FeatureLayer(table, "templayer", SampleConstants.TempLayerAlias));
// This step is needed because you may get a dirty map from mapinfo Session.Current which is retrived from session pool.
myMap.Zoom = new MapInfo.Geometry.Distance(25000, MapInfo.Geometry.DistanceUnit.Mile);
myMap.Center = new MapInfo.Geometry.DPoint(27775.805792979896, -147481.33999999985);
}
MapInfo.WebControls.StateManager.GetStateManagerFromSession().RestoreState();
}
// Save the state
public override void SaveState()
{
string mapAlias = this.ParamsDictionary[AppStateManager.ActiveMapAliasKey] as String;
MapInfo.Mapping.Map myMap = GetMapObj(mapAlias);
if (myMap == null)
{
return;
}
// Note: for performance reasons, only save the map's center and zoom.
AppStateManager.SaveZoomCenterState(myMap);
// Get the workingLayerName saved in WebForm1.aspx page_load.
string workingLayerName = this.ParamsDictionary["WorkingLayerName"] as String;
// Save the map's Working table and layer
MapInfo.Mapping.FeatureLayer workingLayer = (MapInfo.Mapping.FeatureLayer)myMap.Layers[workingLayerName];
MapInfo.Data.Table workingTable = workingLayer != null ? workingLayer.Table : null;
ManualSerializer.SaveMapXtremeObjectIntoHttpSession(workingTable, "WorkingTable");
ManualSerializer.SaveMapXtremeObjectIntoHttpSession(workingLayer, "WorkingLayer");
}
// Creates a theme that shows symbols for negative values.
// Also uses the NumericNull property to hide the symbol of
// the greatest theme value.
private void NegativeValueTheme(Map map)
{
// Get table from the feature layer
MapInfo.Mapping.FeatureLayer mexicoLayer = map.Layers["mexico"] as MapInfo.Mapping.FeatureLayer;
MapInfo.Data.Table mexicoTable = mexicoLayer.Table;
// Add a temporary column to the mexico table,
// calulating the difference between Pop_90 and Pop_80
MapInfo.Data.Columns tempColumns = new MapInfo.Data.Columns();
tempColumns.Add(new MapInfo.Data.Column("CarsMinusTrucks", "(Cars_91-Trucks_91)"));
mexicoTable.AddColumns(tempColumns);
// Create the theme
GraduatedSymbolTheme theme = new GraduatedSymbolTheme(mexicoTable, "CarsMinusTrucks");
// Show Negative symbols
theme.ShowNegativeSymbol = true;
// Setup symbols
theme.PositiveSymbol = new MapInfo.Styles.SimpleVectorPointStyle(35, Color.Blue, 18);
theme.NegativeSymbol = new MapInfo.Styles.SimpleVectorPointStyle(35, Color.Red, 36);
// Get the larget value in the theme column
MapInfo.Data.MIDataReader reader = mexicoTable.ExecuteReader("MAX(CarsMinusTrucks)");
reader.MoveNext();
double maxValue = reader.GetDouble(0);
reader.Dispose();
// Setup the numeric null value to exclude the largest value
theme.NumericNull = maxValue;
theme.HasNumericNull = true;
// These end up being small values, so use the DataValueAtSize
// property to increase the size of the symbols
theme.DataValueAtSize = 50000;
// Create the theme layer
ObjectThemeLayer themeLayer = new ObjectThemeLayer("CarOrTruck", "CarOrTruck", theme);
// Add theme layer to the map
map.Layers.Add(themeLayer);
}
