topic Re: How to create a wall without a Location line? in Revit API Forum

How to create a wall without a Location line?

MasterYakult — Wed, 15 Feb 2023 02:16:47 GMT

Dear experts and scholars,

I am working on Revit API based on Revit 2018. In my project, I need to instantiate and place the wall type which I created. As we all know, we could place a wall by using these methods in the pic below.

However, I would like to make it more convenient for practical work by create wall without creating any LocationCurve first. I would like to make it more like the original Revit UI create wall method, which could place the wall by following the mouse.

What kind of code should I use to achieve this effect? I've been searching online for a long time, but I can't find anything useful. Thanks for your attentions! Somebody helps, please!

@jeremytammik

Re: How to create a wall without a Location line?

Yien_Chao — Wed, 15 Feb 2023 04:02:33 GMT

I think the API was not made like that. Even the action of placing a wall with the mouse is in fact placing a curve first.

Re: How to create a wall without a Location line?

moturi.magati.george — Wed, 15 Feb 2023 05:11:51 GMT

Hi @MasterYakult,

You can use the Revit Lookup tool to snoop your wall created in the UI. Just as @Yien_Chao has said, you will find that Revit UI uses the Curves to create a wall. This is also defined in the documentation.

A sample code to create a simple wall

public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements) { var uiapp = commandData.Application; var uidoc = uiapp.ActiveUIDocument; var app = uiapp.Application; var document = uidoc.Document; //--GET Level var filter_level = new FilteredElementCollector(document) .WhereElementIsNotElementType() .OfCategory(BuiltInCategory.INVALID) .OfClass(typeof(Level)); Element firstlevel = filter_level.FirstElement(); if (firstlevel != null) { using (Transaction tran = new Transaction(document)) { tran.Start("Creating and Placing Wall"); //Create Points XYZ start=new XYZ(0, 0, 0); XYZ end = new XYZ(10, 0, 0); //Create Line Line geomline = Line.CreateBound(start, end); //Create Wall Wall.Create(document, geomline, firstlevel.Id, true); TaskDialog.Show("revit", "Wall Created successfully!"); tran.Commit(); } } return Result.Succeeded; }

Re: How to create a wall without a Location line?

MasterYakult — Thu, 16 Feb 2023 01:38:50 GMT

OK, I got it.Thank you for your patience.😁

Re: How to create a wall without a Location line?

MasterYakult — Thu, 16 Feb 2023 01:56:33 GMT

Thank you for your patience. However, I have got another question here, and maybe you could help me ! If I use the PostCommand like the code in the below pic, is it possible to use specific wall type（Which I created） in the postcommand？

I have learned that the PostCommand has "PostableCommand.ArchitecturalWall" to create the wall, which only use the default wall type. I just want to try to create a wall like the original Revit UI actions do ,not create a specific curve in the code (We don't know where should the wall place before we see the Design drawings，right? ).

Thanks for your attentions again!

Re: How to create a wall without a Location line?

mhannonQ65N2 — Thu, 16 Feb 2023 18:01:09 GMT

You can use UIDocument.PostRequestForElementTypePlacement to place your wall type.

Re: How to create a wall without a Location line?

MasterYakult — Fri, 17 Feb 2023 01:02:33 GMT

Okay,I would try it later.Thanks for your help!