// 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");
}
}
}
private void FillDropDown(string tableName, string colName)
{
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;
}
DropDownList1.Items.Clear();
MapInfo.Mapping.FeatureLayer fl = (MapInfo.Mapping.FeatureLayer)map.Layers[tableName];
MapInfo.Data.Table t = fl.Table;
MIDataReader tr;
MIConnection con = new MIConnection();
MICommand tc = con.CreateCommand();
tc.CommandText = "select " + colName + " from " + t.Alias;
con.Open();
tr = tc.ExecuteReader();
while (tr.Read())
{
DropDownList1.Items.Add(tr.GetString(0));
}
tc.Cancel();
tc.Dispose();
tr.Close();
con.Close();
//t.Close();
}
// Save the state
public override void SaveState()
{
string mapAlias = this.ParamsDictionary[AppStateManager.ActiveMapAliasKey] as String;
MapInfo.Mapping.Map map = GetMapObj(mapAlias);
if (map != null)
{
ManualSerializer.SaveMapXtremeObjectIntoHttpSession(MapInfo.Engine.Session.Current.Selections.DefaultSelection, StateManager.GetKey("Selection"));
MapInfo.WebControls.StateManager.SaveZoomCenterState(map);
// Needs this because StateManger doens't have proper function to save them.
if (StateManager.IsManualState())
{
// this TempLayer should be always there, otherwise there is a chance to get other customer's TempLayer.
MapInfo.Mapping.IMapLayer lyr = map.Layers[SampleConstants.TempLayerAlias];
if (lyr != null)
{
MapInfo.Mapping.FeatureLayer fLyr = lyr as MapInfo.Mapping.FeatureLayer;
// Need to serialize the temp table first since the temp layer is based on it.
ManualSerializer.SaveMapXtremeObjectIntoHttpSession(fLyr.Table, "tempTable");
ManualSerializer.SaveMapXtremeObjectIntoHttpSession(fLyr, "tempLayer");
}
}
}
}
private void FindCity()
{
Find find = null;
try
{
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;
}
// Do the find
MapInfo.Mapping.FeatureLayer findLayer = (MapInfo.Mapping.FeatureLayer)map.Layers[_findLayerName];
find = new Find(findLayer.Table, findLayer.Table.TableInfo.Columns[_findColumnName]);
FindResult result = find.Search(DropDownList1.SelectedItem.Text);
if (result.ExactMatch)
{
// Create a Feature (point) for the location we found
CoordSys csys = findLayer.CoordSys;
FeatureGeometry g = new MapInfo.Geometry.Point(csys, result.FoundPoint.X, result.FoundPoint.Y);
Feature f = new Feature(g, new MapInfo.Styles.SimpleVectorPointStyle(52, System.Drawing.Color.DarkGreen, 32));
// Delete the existing find object and add the new one
MapInfo.Mapping.FeatureLayer workingLayer = (MapInfo.Mapping.FeatureLayer)map.Layers[_workingLayerName];
if (workingLayer != null)
{
(workingLayer.Table as ITableFeatureCollection).Clear();
workingLayer.Table.InsertFeature(f);
}
// Set the map's center and zooom
map.Center = new DPoint(result.FoundPoint.X, result.FoundPoint.Y);
MapInfo.Geometry.Distance d = new MapInfo.Geometry.Distance(1000, map.Zoom.Unit);
map.Zoom = d;
}
else
{
this.Label3.Text = ("Cannot find the country");
}
find.Dispose();
}
catch (Exception)
{
if (find != null)
{
find.Dispose();
}
}
}
// 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);
}
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);
}
// 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);
}
// 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);
}
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;
}