//获取将输入点最近点，该线段分割成两段
public static IPolyline[] GetSubLine(IPoint point, IFeature pFeature)
{
try
{
IPolyline pLine = pFeature.Shape as IPolyline;
IPolyline[] pLines = new IPolyline[2];
IPolyline StarttoPointLine = new PolylineClass();
IPolyline EndtoPointLine = new PolylineClass();
bool splithappened;
int partindex, segmentindex;
object pObject = Type.Missing;
//IPoint IPoint = GetNearestPoint(point);
pLine.SplitAtPoint(point, false, false, out splithappened, out partindex, out segmentindex);
ISegmentCollection lineSegCol = (ISegmentCollection)pLine;
ISegmentCollection newSegCol = (ISegmentCollection)StarttoPointLine;
ISegmentCollection endSegCol = EndtoPointLine as ISegmentCollection;
for (int i = 0; i < segmentindex; i++)
{
newSegCol.AddSegment(lineSegCol.get_Segment(i), ref pObject, ref pObject);
}
for (int j = segmentindex; j < lineSegCol.SegmentCount; j++)
{
endSegCol.AddSegment(lineSegCol.get_Segment(j), ref pObject, ref pObject);
}
lineSegCol.RemoveSegments(0, segmentindex, true);
pLines[0] = newSegCol as IPolyline;
pLines[1] = endSegCol as IPolyline;
return(pLines);
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString(), "异常");
return(null);
}
}