Using StandardPointGroupQuery object to build a PointGroup

By Partha Sarkar

In AutoCAD Civil 3D, Points can be selected and added to a PointGroup using either a standard (StandardPointGroupQuery object) or custom (CustomPointGroupQuery object) query. Both of these classes inherit from the PointGroupQuery base class.

Here is a C# code snippet which demonstrates how to create a PointGroup using StandardPointGroupQuery object.

//start a transaction 
using (Transaction trans = db.TransactionManager.StartTransaction())
{
 
  // Check if the pointGrpName already exists before trying to add it
  ObjectId pointGrpId = civilDoc.PointGroups.Add(pointGrpName);
  PointGroup pointGrp = pointGrpId.GetObject(OpenMode.ForWrite) as PointGroup;
 
  // Build a quesry using StandardPointGroupQuery object
  // Query conditions used below are specific to Civil 3D Tutorial DWG file "Points-3.dwg"
 
  StandardPointGroupQuery standardPointGrpQry = new StandardPointGroupQuery();
 
  // One thing to note here :
  // All of the Include* properties are OR-ed together, 
  // and all the Exclude* properties are OR- ed together 
 
  standardPointGrpQry.IncludeNumbers = "550-560, 565-572";
  standardPointGrpQry.ExcludeElevations = ">100.00";              
 
  //This method sets the query object in the point group
  pointGrp.SetQuery(standardPointGrpQry);
 
  trans.Commit();              
}

Hope this is useful to you!