public void LoadAndDrawData()
{
this.MainMapImage.Map.BackColor = Color.LightBlue;
this.MainMapImage.Map.Center = new SharpMap.Geometries.Point(-4, 40); //Set center of map
this.MainMapImage.Map.Zoom = 12; //Set zoom level
this.MainMapImage.Map.Size = new System.Drawing.Size(1000, 1000); //Set output size
//Set up the countries layer
SharpMap.Layers.VectorLayer layCountries = new SharpMap.Layers.VectorLayer("Countries");
//Set the datasource to a shapefile in the App_data folder
layCountries.DataSource = new SharpMap.Data.Providers.ShapeFile(@"Data\coastlines.shp");
//Set fill-style to green
layCountries.Style.Fill = new SolidBrush(Color.Black);
//Set the polygons to have a black outline
layCountries.Style.Outline = System.Drawing.Pens.Black;
layCountries.Style.EnableOutline = true;
layCountries.SRID = 4321;
//Set up a political area layer
SharpMap.Layers.VectorLayer layArea = new SharpMap.Layers.VectorLayer("Areas");
//Set the datasource to a shapefile in the App_data folder
layArea.DataSource = new SharpMap.Data.Providers.ShapeFile(@"Data\areas.shp");
//Define a blue 1px wide pen
layArea.Style.Line = new Pen(Color.Red, 10.4f);
layArea.Style.Fill = new SolidBrush(Color.Beige);
layArea.SRID = 4322;
//Set up a road layer
SharpMap.Layers.VectorLayer layRoads = new SharpMap.Layers.VectorLayer("Roads");
//Set the datasource to a shapefile in the App_data folder
layRoads.DataSource = new SharpMap.Data.Providers.ShapeFile(@"Data\roads.shp");
//Define a blue 1px wide pen
layRoads.Style.Line = new Pen(Color.Red, 2.0f);
layRoads.MaxVisible = 15;
layRoads.SRID = 4323;
SharpMap.Rendering.Thematics.CustomTheme iTheme = new SharpMap.Rendering.Thematics.CustomTheme(GetRoadCustomStyle);
SharpMap.Styles.VectorStyle defaultstyle = new SharpMap.Styles.VectorStyle(); //Create default renderstyle
defaultstyle.Line = new Pen(Color.Red, 0.5f);
iTheme.DefaultStyle = defaultstyle;
layRoads.Theme = iTheme;
SharpMap.Layers.VectorLayer layCities = new SharpMap.Layers.VectorLayer("Cities");
//Set the datasource to a shapefile in the App_data folder
layCities.DataSource = new SharpMap.Data.Providers.ShapeFile(@"Data\cities.shp");
//Define a blue 1px wide pen
layCities.Style.Symbol = new Bitmap(@"Data\city.png");
layCities.Style.SymbolScale = 1.8f;
layCities.MaxVisible = 10;
layCities.SRID = 4324;
//Set up a river layer
SharpMap.Layers.VectorLayer layRivers = new SharpMap.Layers.VectorLayer("Rivers");
//Set the datasource to a shapefile in the App_data folder
layRivers.DataSource = new SharpMap.Data.Providers.ShapeFile(@"Data\rivers.shp");
//Define a blue 1px wide pen
layRivers.Style.Line = new Pen(Color.Blue, 0.4f);
layRivers.MaxVisible = 7;
layRivers.SRID = 4325;
//Add the layers to the map object.
//The order we add them in are the order they are drawn, so we add the rivers last to put them on top
MainMapImage.Map.Layers.Add(layCountries);
MainMapImage.Map.Layers.Add(layArea);
MainMapImage.Map.Layers.Add(layRivers);
MainMapImage.Map.Layers.Add(layRoads);
MainMapImage.Map.Layers.Add(layCities);
MainMapImage.Map.Center = new SharpMap.Geometries.Point(-4, 40); //Set center of map
MainMapImage.Map.Zoom = 12; //Set zoom level
MainMapImage.Map.Size = new System.Drawing.Size(1000, 1000); //Set output size
MainMapImage.ActiveTool = SharpMap.Forms.MapImage.Tools.Pan;
MainMapImage.WheelZoomMagnitude = 1.5;
MainMapImage.Refresh();
}
public void LoadAndDrawData()
{
this.MainMapImage.Map.BackColor = Color.LightBlue;
this.MainMapImage.Map.Center = new SharpMap.Geometries.Point(-4, 40); //Set center of map
this.MainMapImage.Map.Zoom = 12; //Set zoom level
this.MainMapImage.Map.Size = new System.Drawing.Size(1000, 1000); //Set output size
//Set up the countries layer
SharpMap.Layers.VectorLayer layCountries = new SharpMap.Layers.VectorLayer("Countries");
//Set the datasource to a shapefile in the App_data folder
layCountries.DataSource = new SharpMap.Data.Providers.ShapeFile(@"Data\coastlines.shp");
//Set fill-style to green
layCountries.Style.Fill = new SolidBrush(Color.Black);
//Set the polygons to have a black outline
layCountries.Style.Outline = System.Drawing.Pens.Black;
layCountries.Style.EnableOutline = true;
layCountries.SRID = 4321;
//Set up a political area layer
SharpMap.Layers.VectorLayer layArea = new SharpMap.Layers.VectorLayer("Areas");
//Set the datasource to a shapefile in the App_data folder
layArea.DataSource = new SharpMap.Data.Providers.ShapeFile(@"Data\areas.shp");
//Define a blue 1px wide pen
layArea.Style.Line = new Pen(Color.Red, 10.4f);
layArea.Style.Fill = new SolidBrush(Color.Beige);
layArea.SRID = 4322;
//Set up a road layer
SharpMap.Layers.VectorLayer layRoads = new SharpMap.Layers.VectorLayer("Roads");
//Set the datasource to a shapefile in the App_data folder
layRoads.DataSource = new SharpMap.Data.Providers.ShapeFile(@"Data\roads.shp");
//Define a blue 1px wide pen
layRoads.Style.Line = new Pen(Color.Red, 2.0f);
layRoads.MaxVisible = 15;
layRoads.SRID = 4323;
SharpMap.Rendering.Thematics.CustomTheme iTheme = new SharpMap.Rendering.Thematics.CustomTheme(GetRoadCustomStyle);
SharpMap.Styles.VectorStyle defaultstyle = new SharpMap.Styles.VectorStyle(); //Create default renderstyle
defaultstyle.Line = new Pen(Color.Red, 0.5f);
iTheme.DefaultStyle = defaultstyle;
layRoads.Theme = iTheme;
SharpMap.Layers.VectorLayer layCities = new SharpMap.Layers.VectorLayer("Cities");
//Set the datasource to a shapefile in the App_data folder
layCities.DataSource = new SharpMap.Data.Providers.ShapeFile(@"Data\cities.shp");
//Define a blue 1px wide pen
layCities.Style.Symbol = new Bitmap(@"Data\city.png");
layCities.Style.SymbolScale = 1.8f;
layCities.MaxVisible = 10;
layCities.SRID = 4324;
//Set up a river layer
SharpMap.Layers.VectorLayer layRivers = new SharpMap.Layers.VectorLayer("Rivers");
//Set the datasource to a shapefile in the App_data folder
layRivers.DataSource = new SharpMap.Data.Providers.ShapeFile(@"Data\rivers.shp");
//Define a blue 1px wide pen
layRivers.Style.Line = new Pen(Color.Blue, 0.4f);
layRivers.MaxVisible = 7;
layRivers.SRID = 4325;
//Add the layers to the map object.
//The order we add them in are the order they are drawn, so we add the rivers last to put them on top
MainMapImage.Map.Layers.Add(layCountries);
MainMapImage.Map.Layers.Add(layArea);
MainMapImage.Map.Layers.Add(layRivers);
MainMapImage.Map.Layers.Add(layRoads);
MainMapImage.Map.Layers.Add(layCities);
MainMapImage.Map.Center = new SharpMap.Geometries.Point(-4, 40); //Set center of map
MainMapImage.Map.Zoom = 12; //Set zoom level
MainMapImage.Map.Size = new System.Drawing.Size(1000, 1000); //Set output size
MainMapImage.ActiveTool = SharpMap.Forms.MapImage.Tools.Pan;
MainMapImage.WheelZoomMagnitude = 1.5;
MainMapImage.Refresh();
}
public void OnQueryLayer(string query, System.Drawing.Color resultColor)
{
// Create the postGis provider object, and init it's query property with the passed query
SharpMap.Data.Providers.PostGIS postGisProv = new
SharpMap.Data.Providers.PostGIS(Constants.connStr, _activeLayer, Constants.geomName, Constants.idName)
{
DefinitionQuery = query
};
SharpMap.Rendering.Thematics.ITheme theme = null;
System.Drawing.Brush queryResultBrush = new System.Drawing.SolidBrush(resultColor);
// Create a theme based on the active layer
if (_activeLayer == Constants.roadsTable)
{
System.Drawing.Pen queryResultPen = new System.Drawing.Pen(queryResultBrush);
theme = new SharpMap.Rendering.Thematics.CustomTheme((SharpMap.Data.FeatureDataRow fdr)
=> { return(new VectorStyle()
{
Line = queryResultPen
}); });
}
else if (_activeLayer == Constants.nrTable)
{
theme = new SharpMap.Rendering.Thematics.CustomTheme((SharpMap.Data.FeatureDataRow fdr)
=> { return(new VectorStyle()
{
PointColor = queryResultBrush, PointSize = 3f
}); });
}
else
{
theme = new SharpMap.Rendering.Thematics.CustomTheme((SharpMap.Data.FeatureDataRow fdr)
=> { return(new VectorStyle()
{
Fill = queryResultBrush
}); });
}
// Create the resulting vector layer object for query result, and set the created theme
VectorLayer resultingLayer = new VectorLayer(Constants.queryLayerName)
{
DataSource = postGisProv,
Theme = theme
};
// Create label of the results
LabelLayer resultingLabel = new LabelLayer(Constants.queryLabelName)
{
DataSource = resultingLayer.DataSource,
Enabled = true,
LabelColumn = "name",
MaxVisible = 0.3f
};
try
{
// NPGSQL exception handle ruins the map by returning an empty layer
// Getting an envelope when query is invalid triggers an exception
SharpMap.Data.FeatureDataSet fds = new SharpMap.Data.FeatureDataSet();
postGisProv.Open();
Envelope envelope = resultingLayer.Envelope; // <----- Exception
postGisProv.ExecuteIntersectionQuery(envelope, fds);
postGisProv.Close();
// Remove the previous query result if it exists
OnRemoveLayer(Constants.queryLayerName);
OnRemoveLayer(Constants.queryLabelName);
// Add the results to the map
_view.AddLayer(resultingLayer);
_view.AddLayer(resultingLabel);
_view.DataGridView = fds.Tables[0];
}
catch (System.Exception e)
{
System.Console.Write(e.Message);
return;
}
}
