Question

I found the CollapseAll macro online that has worked for me in vs2005 and vs2008. However, this half way works in vs2010. It looks like it only collapses the top nodes and not any subnodes that may be expanded? any ideas?

Thanks,
rod.

    Sub CollapseAll()
        ' Get the the Solution Explorer tree
        Dim UIHSolutionExplorer As UIHierarchy
        UIHSolutionExplorer = DTE.Windows.Item(Constants.vsext_wk_SProjectWindow).Object()
        ' Check if there is any open solution
        If (UIHSolutionExplorer.UIHierarchyItems.Count = 0) Then
            ' MsgBox("Nothing to collapse. You must have an open solution.")
            Return
        End If
        ' Get the top node (the name of the solution)
        Dim UIHSolutionRootNode As UIHierarchyItem
        UIHSolutionRootNode = UIHSolutionExplorer.UIHierarchyItems.Item(1)
        UIHSolutionRootNode.DTE.SuppressUI = True
        ' Collapse each project node
        Dim UIHItem As UIHierarchyItem
        For Each UIHItem In UIHSolutionRootNode.UIHierarchyItems
            'UIHItem.UIHierarchyItems.Expanded = False
            If UIHItem.UIHierarchyItems.Expanded Then
                Collapse(UIHItem)
            End If
        Next
        ' Select the solution node, or else when you click 
        ' on the solution window
        ' scrollbar, it will synchronize the open document 
        ' with the tree and pop
        ' out the corresponding node which is probably not what you want.
        UIHSolutionRootNode.Select(vsUISelectionType.vsUISelectionTypeSelect)
        UIHSolutionRootNode.DTE.SuppressUI = False
    End Sub

    Private Sub Collapse(ByVal item As UIHierarchyItem)
        For Each eitem As UIHierarchyItem In item.UIHierarchyItems
            If eitem.UIHierarchyItems.Expanded AndAlso eitem.UIHierarchyItems.Count > 0 Then
                Collapse(eitem)
            End If
        Next
        item.UIHierarchyItems.Expanded = False
    End Sub
End Module

Answer 1

There’s a VS2010 extension at Sara Ford’s blog:

http://blogs.msdn.com/b/saraford/archive/2010/05/13/collapse-selection-in-solution-explorer-extension-7.aspx