ArcEngine draw a polyline or multipoint

Question

Does anyone have a bit of code to plot a multiline? I just want to add some IPoints to a collection and display in a particular color and width, but I can't find a good way to do this.

Right now I'm using this after a dynamic draw event: dynamicDisplay.DrawMultipleLines(pointcollection);
But there's no clear place to set the graphic attributes, and it plots incorrectly.

Answer 1

You can use a GraphicsLayer to do this, create a line element and add to the GraphicsContainer. Snippet: Add Graphic to Map Snippet

Answer 2

Here's what I did

I inherited BaseDynamicLayer and called AddLayer from my axMapControl. Then I overrode DrawDynamicLayer and did a iDynamicDisplay.DrawPolyline

But the trick was I used a IPointCollection4 obj and NOT a IPointCollection5 obj as an argument to the DrawPolyLine

IPointCollection4 myPolyLine = new PolylineClass(); //IPointCollection5 DID NOT WORK FOR ME
//add some points