This article explains how you can delete parts in a Tekla Structure model using the Tekla Open API in VB.Net.

Step 1:

Add reference to the Tekla.Structures.Model library located in the path “C:Program FilesTekla Structures20.0ntbinplugins” and manually open the tekla model. This has been covered in the article below:

• VB.Net Open Tekla Structure Model (Tekla Open API)

Step 2:

In order to delete a part you will need to have a reference to the parts object. In order to get reference to the parts object. I’ve explained how this can be done in the article below:

• VB.Net Get Reference to Parts, Tekla Open API

In this example we are going to delete all the Beam type Parts in the model. This can be done using the code below:

Sub main()
Dim appModel As Tekla.Structures.Model.Model
appModel = New Tekla.Structures.Model.Model
Dim objModel As Tekla.Structures.Model.ModelObject
Dim objBeam As Tekla.Structures.Model.Beam
For Each objModel In appModel.GetModelObjectSelector.GetAllObjects
    objBeam = TryCast(objModel, Tekla.Structures.Model.Beam)
    If IsNothing(objBeam) = False Then
        'delete beam object
        objBeam.Delete()
    End If
Next
'apply changes
appModel.CommitChanges()
End Sub


Before:

After:

The code iterates through all the ModelObjects in the current model.

Note: Aside from the objects you have drawn there will be many system objects in there as well.

The code below will try to cast the object to a Beam type. If it succeeds, then we will know that the object is of the Beam type:

objBeam = TryCast(objModel, Tekla.Structures.Model.Beam)


Note: Beams and column are both of the Beam type in the Tekla Open API.

You can download the file and code used in this article from the link below:

• Delete.Zip