Improve session management and initialization logic

Refactored ClassWindream_allgemein to enhance session lifecycle handling and robustness. Now, after successful impersonation/login, session and object type variables are set and errors are logged if loading fails. Changed impersonation/login to return Boolean for clarity. Init() now returns session creation success. Added GetWMSession to properly reset sessions. Ensured object types are loaded when reusing sessions. These changes improve error handling and maintain consistent session state.

ToolCollection/ClassWindream_allgemein.vb

@@ -95,10 +95,24 @@ Public Class ClassWindream_allgemein
             SessionAsUser = aSession
             If aSession.aLoggedin = True Then
                 _Logger.Debug($"#Impersonate login [{UserName}] successfull!")
-                Return SessionAsUser
+                Me.oWMSession = aSession
+                CURRENToWMSession = aSession
+                CURRENToWMSession_Created = Now
+                Me.oObjekttypen = aSession.GetWMObjectTypes(WINDREAMLib.WMEntity.WMEntityDocument)
+                If Err.Number <> 0 Then
+                    _Logger.Warn("Fehler beim Laden der Objekttypen nach Impersonate-Login: " & Err.Description)
+                    Err.Clear()
+                End If
+                Me.oOrdnerTypen = aSession.GetWMObjectTypes(WINDREAMLib.WMEntity.WMEntityFolder)
+                If Err.Number <> 0 Then
+                    _Logger.Warn("Fehler beim Laden der Ordnertypen nach Impersonate-Login: " & Err.Description)
+                    Err.Clear()
+                End If
+                Return True
             End If
 
         End If
+        Return False
     End Function
 
     ''' <summary>
@@ -108,21 +122,36 @@ Public Class ClassWindream_allgemein
     ''' <remarks></remarks>
     Public Function Init() As Boolean
 
-        If IsNothing(CURRENToWMSession) OrElse Not IsLoggedIn() Then
+        If IsNothing(CURRENToWMSession) OrElse Not CBool(CURRENToWMSession.aLoggedin) Then
             If WMLOGIN_DOMAIN <> String.Empty Then
-                GetWMSessionAsUser(WMLOGIN_DOMAIN, Me.GetCurrentServer, WMLOGIN_USER, WMLOGIN_PW)
+                Return GetWMSessionAsUser(WMLOGIN_DOMAIN, Me.GetCurrentServer, WMLOGIN_USER, WMLOGIN_PW)
             Else
-                GetWMSession()
+                Return GetWMSession()
             End If
 
         Else
             If My.Settings.vLogErrorsonly = False Then _Logger.Debug("WMSession already created!")
             oWMSession = CURRENToWMSession
+            If IsNothing(oObjekttypen) Then
+                oObjekttypen = oWMSession.GetWMObjectTypes(WINDREAMLib.WMEntity.WMEntityDocument)
+            End If
+            If IsNothing(oOrdnerTypen) Then
+                oOrdnerTypen = oWMSession.GetWMObjectTypes(WINDREAMLib.WMEntity.WMEntityFolder)
+            End If
             Return True
         End If
 
     End Function
     Private Function GetWMSession()
+        If Not IsNothing(CURRENToWMSession) Then
+            Try
+                CURRENToWMSession.Logout()
+            Catch
+                ' ignorieren – Session war evtl. schon tot
+            End Try
+            CURRENToWMSession = Nothing
+        End If
+
         Try
             Try
                 ' Session-Objekt instanziieren und mit dem im Client ausgewählten Server belegen