The ConstructExtended of IConstructCurve does not work??how to solve??

wxd — Wed, 09 May 2012 12:41:51 GMT

Hello,I want ot create a extension line of a line to extended to the desstination line, so I used the   ConstructExtended of IConstructCurve , but it does not work, the follow is my code, and I use the arcobject 10.0 and vs 2010 to code it?How to solve this problem, because in VS 2005 and AE 9.2 , it tested correctly.

here is my code:

    IPoint pPt = new PointClass();
     IPolyline slopeLine = new PolylineClass();
     slopeLine.FromPoint = startPt;
     slopeLine.ToPoint = CreatePointByAngleDistance(startPt, radAngle, 50);
     slopeLine.SpatialReference = pSR;
     IConstructCurve2 pConCurve = new PolylineClass();
     bool isExtensionPerfomed = false;
   ICurve pCurve1 = slopeLine as ICurve;
    ICurve pCurve2 = desLine as ICurve;
    pConCurve.ConstructExtended(pCurve1,pCurve2, (int)esriCurveExtension.esriDefaultCurveExtension,ref isExtensionPerfomed);
    pPt = slopeLine.ToPoint;

Re: The ConstructExtended of IConstructCurve does not work�?how to solve�?

DuncanHornby — Tue, 15 May 2012 12:45:05 GMT

Looking at your code extract it appears OK, but you should confirm that the polyline slopeLine is valid, try putting in a message box to return the length of slopeLine. If this was you expected then something else is going wrong.

topic The ConstructExtended of IConstructCurve does not work??how to solve?? in ArcObjects SDK Questions

The ConstructExtended of IConstructCurve does not work??how to solve??

Re: The ConstructExtended of IConstructCurve does not work�?how to solve�?