// Creates Route polyline
private void CreatePolyline(ISMDirections objDirections)
{
// create polyline
IPolyline objLine = null;
objLine = new PolylineClass();
// get points collection
IPointCollection objPoints = null;
objPoints = objLine as IPointCollection;
// Adds Directions points to polyline
AddPointsToPolyline(objDirections, ref objPoints);
// Project points to Map projection
IMxDocument objDoc = m_application.Document as IMxDocument;
IMap objMap = objDoc.FocusMap;
objLine.Project(objMap.SpatialReference);
// create path graphics element
IElement objElement = null;
objElement = new LineElementClass();
objElement.Geometry = objLine;
// Set line color width and style
SetLineProperties(objElement);
// get Graphic container
IGraphicsContainer objCont = objMap as IGraphicsContainer;
// Add line to map
objCont.AddElement(objElement, 0);
}
// Outputs result, zoom to route, fill directions
private void ShowResult(ISMDirections objDirections)
{
// Fill directions
m_dlgDirections.Init(objDirections);
m_btnShowDirections.Enabled = true;
try
{
// Zoom to extent
Envelope objEnv = null;
objEnv = new Envelope();
objEnv.PutCoords(objDirections.BoundBox.Left, objDirections.BoundBox.Bottom, objDirections.BoundBox.Right, objDirections.BoundBox.Top);
objEnv.Expand(1.1, 1.1, true);
// set spatial reference
IGeometry objGeo = objEnv as IGeometry;
objGeo.SpatialReference = m_objSpatialReference;
ZoomToExtent(objEnv);
// Create polyline
CreatePolyline(objDirections);
}
catch (Exception ex)
{
MessageBox.Show(this, "Cannot show result.", "Routing Sample", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
finally
{
// Refresh map
RefreshMap();
}
}
// Fills text box
public void Init(ISMDirections objDirections)
{
int nCount = objDirections.Count;
string strText = null;
// Totals
strText = objDirections.TotalsText + System.Environment.NewLine + System.Environment.NewLine;
// Add text for each Direction
for (int i = 0; i < nCount; i++)
{
SMDirItem objItem = null;
objItem = objDirections.get_Item(i);
// Direction text
strText = strText + objItem.Text + System.Environment.NewLine;
// Drive text (length, time)
if (objItem.DriveText.Length > 0)
strText = strText + " " + objItem.DriveText + System.Environment.NewLine;
strText = strText + System.Environment.NewLine;
}
// Set control text
m_txtDirections.Text = strText;
// deselect if was be selected
m_txtDirections.Select(0, 0);
}
// Fills text box
public void Init(ISMDirections objDirections)
{
int nCount = objDirections.Count;
string strText = null;
// Totals
strText = objDirections.TotalsText + System.Environment.NewLine + System.Environment.NewLine;
// Add text for each Direction
for (int i = 0; i < nCount; i++)
{
SMDirItem objItem = null;
objItem = objDirections.get_Item(i);
// Direction text
strText = strText + objItem.Text + System.Environment.NewLine;
// Drive text (length, time)
if (objItem.DriveText.Length > 0)
strText = strText + " " + objItem.DriveText + System.Environment.NewLine;
strText = strText + System.Environment.NewLine;
}
// Set control text
m_txtDirections.Text = strText;
// deselect if was be selected
m_txtDirections.Select(0, 0);
}
// Find route and initialize Driving Directions page
private void FindRoute()
{
if (m_objRouter == null)
return;
// Init DD
m_btnShowDirections.Enabled = false;
m_dlgDirections.Init();
System.Windows.Forms.Cursor Cursor = this.Cursor;
try
{
this.Cursor = Cursors.WaitCursor;
// set highways priority (0.0 - 100.0)
SMRoadPreferences objPreferences = m_objRouter.Preferences;
objPreferences.set_Item(esriSMRoadType.esriSMRoadTypeHighways, (short)m_trackUseRoad.Value);
// set route type (Time/Length)
if (m_rbtnQuickest.Checked)
m_objRouter.NetAttributeName = "Time";
else
m_objRouter.NetAttributeName = "Length";
// Set Length Units for Directions output
SetDirectionsUnits();
// Geocode user data and adds Start and finish
SMStopsCollection objStopsCol = new SMStopsCollectionClass(); ;
AddStops(objStopsCol);
// Add restrictions
m_dlgRestrictions.SetupRouter(m_objRouter);
// get driving directions
ISMDirections objDirections = null;
objDirections = m_objRouter.Solve(objStopsCol, null);
// Output result, zoom to route, fill directions
ShowResult(objDirections);
}
catch (Exception ex)
{
MessageBox.Show(this, "Cannot find route." + System.Environment.NewLine + ex.Message, "Routing Sample", MessageBoxButtons.OK, MessageBoxIcon.Error);
// Init DD
m_btnShowDirections.Enabled = false;
m_dlgDirections.Init();
}
finally
{
this.Cursor = Cursor;
}
}
// Adds Directions points to point collection
private void AddPointsToPolyline(ISMDirections objDirections, ref IPointCollection objPoints)
{
Point objPoint = new PointClass();
// copy points from DD to line
int nItemsCount = objDirections.Count;
for (int i = 0; i < nItemsCount; i++)
{
// get shape from Direction
ISMDirItem objItem = null;
objItem = objDirections.get_Item(i) as ISMDirItem;
ISMPointsCollection objShape = null;
objShape = objItem.Shape;
// Add point from Direction to received collection
int nPointsCount = objShape.Count - 1;
for (int j = 0; j <= nPointsCount; j++)
{
// get point from route
SMRouterPoint objRouterPoint = objShape.get_Item(j);
// Optimization: Not add point if last added point has similar coords
bool bAddPoint = false;
if (objPoint.IsEmpty)
bAddPoint = true;
else if ((objPoint.X != objRouterPoint.X) & (objPoint.Y != objRouterPoint.Y))
bAddPoint = true;
if (bAddPoint)
{
// Add point if need
objPoint.X = objRouterPoint.X;
objPoint.Y = objRouterPoint.Y;
objPoint.SpatialReference = m_objSpatialReference;
object missing = System.Reflection.Missing.Value;
objPoints.AddPoint(objPoint, ref missing, ref missing);
}
}
}
}
