Duct hanger - place family instance Revit API-CodePudding

i'm trying to place a family using the API (c#).

When using the NewFamiltInstace overloaded method that takes (location, symbol,host, level, structural) - i'm expecting to get the instance of the hanger family in the level i have inserted, and in the elevation of the host ( the duct).

instead - i get the duct hanger in the ground floor no matter what i'm doing, can any one understand why, and what sholud i do to get it in the desired level?

tried multiple overloaded methods, tried using the duct as a host, the level as a host etc.. the hangers always show up at the floor of ground level.

the code from my transaction: '''

using (Transaction trans = new Transaction(doc, "Place Family"))
{
trans.Start();


int indx = 0;
foreach (XYZ hanger_xyz in hangerCoordinates)
{

if (!hangerSymbol.IsActive)
{
hangerSymbol.Activate();
}

doc.Create.NewFamilyInstance(hanger_xyz, hangerSymbol,duct,level, Autodesk.Revit.DB.Structure.StructuralType.NonStructural);

}

trans.Commit();
}

'''

CodePudding user response：

Please study the Revit SDK sample FabricationPartLayout. That will solve your problem. The samples are available from the Revit Developer Center.

CodePudding user response：

figured it out.

After testing all of the 11 overloaded methods for newFamilyInstance and their required arguments, and snooping around with RevitLookUp, i managed to get the right overloded method which is:

FamilyInstance familyInstance = doc.Create.NewFamilyInstance(face, hanger_xyz, new XYZ(0, 1, 0), hangerSymbol);

face==> as a Referemce object (extracted it from a face Face that i got from a GeoElement that i got from the desired level's floor)

hanger_xyz==>an XYZ location

new XYZ(0,1,0)==> a direction of the family as it is when it's attached to a cielling host ( got it from revitLookUp)

hangerSymbol ==> the familysymbol.

cheers!