Learn how to streamline SOLIDWORKS add-in development using C# and VB.NET via free and open-source SwEx.AddIn Framework
File closing (destroy) notification (such as DestroyNotify2) for parts, assemblies and drawings are raised when the file is about to be closed (pre notification), which means that file is still not released from memory.
This could be a blocker for the applications such as Product Data Management (PDM) where closing of the file should unlock it as some additional operation might need to be performed (e.g. removing the file from the local cache, moving to the archive, post processing the stream, clearing resources).
This example demonstrates how to handle both pre and post notifications using SOLIDWORKS API.
- Open any SOLIDWORKS file
- Run the macro from the main method in the macro module. Temp form is displayed
- Close SOLIDWORKS file
- See the output in the Immediate window of VBA. There are 2 lines printed:
- First - when the file is about to be closed
- Second - when file is fully closed
At both handlers macro checks if the file is unlocked (i.e. released from the memory). As the result in first handler - file is locked and it is unlocked in the second handler, as expected.
NOTE: IsFileUnlocked function is opening the stream for read-write and it can potentially corrupt the file. It is strongly recommended to use this macro on sample model only
To create a macro add 2 more modules into your VBA Editor:
- Class Module named FileWatcher
- User Form named UserForm1
Paste the codes into the corresponding modules as follows:
FileWatcher Class Module
Public Event ModelClosed(path As String) Public Event ModelClosing(path As String) Dim WithEvents swApp As SldWorks.SldWorks Dim WithEvents swPart As SldWorks.PartDoc Dim WithEvents swAssy As SldWorks.AssemblyDoc Dim WithEvents swDraw As SldWorks.DrawingDoc Dim IsClosing As Boolean Dim ModelPath As String Sub WatchModelClose(model As SldWorks.ModelDoc2) IsClosing = False If Not model Is Nothing Then Select Case model.GetType() Case swDocumentTypes_e.swDocPART Set swPart = model Case swDocumentTypes_e.swDocASSEMBLY Set swAssy = model Case swDocumentTypes_e.swDocDRAWING Set swDraw = model End Select Else Err.Raise vbError, "", "Model is null" End If ModelPath = model.GetPathName() End Sub Private Sub Class_Initialize() Set swApp = Application.SldWorks End Sub Private Function swApp_OnIdleNotify() As Long If IsClosing Then IsClosing = False RaiseEvent ModelClosed(ModelPath) End If swApp_OnIdleNotify = 0 End Function Private Function swPart_DestroyNotify2(ByVal DestroyType As Long) As Long swPart_DestroyNotify2 = HandleDestroyEvent(DestroyType) End Function Private Function swAssy_DestroyNotify2(ByVal DestroyType As Long) As Long swAssy_DestroyNotify2 = HandleDestroyEvent(DestroyType) End Function Private Function swDraw_DestroyNotify2(ByVal DestroyType As Long) As Long swDraw_DestroyNotify2 = HandleDestroyEvent(DestroyType) End Function Function HandleDestroyEvent(ByVal DestroyType As Long) As Long If DestroyType = swDestroyNotifyType_e.swDestroyNotifyDestroy Then RaiseEvent ModelClosing(ModelPath) IsClosing = True End If HandleDestroyEvent = 0 End Function
Dim WithEvents FileCloseWatcher As FileWatcher Private Sub FileCloseWatcher_ModelClosed(path As String) CheckFileLockState "Post Close", path End End Sub Private Sub FileCloseWatcher_ModelClosing(path As String) CheckFileLockState "Pre Close", path End Sub Private Sub UserForm_Initialize() Dim swApp As SldWorks.SldWorks Set swApp = Application.SldWorks Set FileCloseWatcher = New FileWatcher FileCloseWatcher.WatchModelClose swApp.ActiveDoc End Sub Sub CheckFileLockState(state As String, path As String) Debug.Print "State: " & state & ". Unlocked: " & IsFileUnlocked(path) End Sub Function IsFileUnlocked(filePath As String) As Boolean IsFileUnlocked = False Dim fileNmb As Integer fileNmb = FreeFile On Error Resume Next Open filePath For Input Lock Read Write As #fileNmb If Err.Number = 0 Then IsFileUnlocked = True End If Close fileNmb End Function
Dim swApp As SldWorks.SldWorks Sub main() Set swApp = Application.SldWorks UserForm1.Show vbModeless End Sub