I need to draw a line which have a set of point collection. From the point collection am getting the line. Then i need to pass this line as a Element to Draw in GraphicsContainer. But, the problem is, while casting the line as element, all the values are set except the spatialreference...
What is the reason? Anyone have answer?
// create polyline
IPolyline objLine = null;
objLine = new PolylineClass();
// get points collection
IPointCollection objPoints = null;
objPoints = objLine as IPointCollection;
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);
}
}
}
IElement objElement = null;
objElement = new LineElementClass();
objElement.Geometry =objLine as IGeometry;
SimpleLineSymbol objSymbol = null;
objSymbol = new SimpleLineSymbolClass();
// Set Symbol style and width
objSymbol.Style = esriSimpleLineStyle.esriSLSSolid;
objSymbol.Width = 10;
// Set symbol color
RgbColor objColor = null;
objColor = new RgbColorClass();
objColor.Red = 255;
objColor.Green = 0;
objColor.Blue = 0;
objSymbol.Color = objColor;
// set line symbol
ILineElement objLineElement = objElement as ILineElement;
objLineElement.Symbol = objSymbol as ILineSymbol;
// get Graphic container
IGraphicsContainer objCont = objMap as IGraphicsContainer;
// Add line to map
objCont.AddElement(objElement, 0);
