Fix bug: Additional Empty Sheet Issue in Column Metadata

instat/frmMain.vb

@@ -328,6 +328,8 @@ Public Class frmMain
         mnuDataViewWindow.Checked = True
         mnuOutputWindow.Checked = True
         mnuLogScript.Checked = False
+        UpdateSwapDataAndMetadata()
+        UpdateSwapDataAndScript()
 
         EnableDisbaleViewSwapMenu(True)
         UpdateSwapDataAndScript()
@@ -850,6 +852,7 @@ Public Class frmMain
     Private Sub mnuPrepareSheetColumnMetadata_Click(sender As Object, e As EventArgs) Handles mnuViewColumnMetadata.Click
         mnuDataFrameMetadat.Checked = mnuViewDataFrameMetadata.Checked
         mnuViewColumnMetadata.Checked = Not mnuViewColumnMetadata.Checked
+        ucrColumnMeta.IsEnabled = mnuViewColumnMetadata.Checked
         UpdateLayout()
     End Sub
 
@@ -2311,12 +2314,14 @@ Public Class frmMain
     Private Sub MnuMetadata_ButtonClick(sender As Object, e As EventArgs) Handles mnuMetadata.ButtonClick
         mnuViewColumnMetadata.Checked = Not mnuViewColumnMetadata.Checked
         mnuColumnMetadat.Checked = mnuViewColumnMetadata.Checked
+        ucrColumnMeta.IsEnabled = mnuViewColumnMetadata.Checked
         UpdateLayout()
     End Sub
 
     Private Sub MnuColumnMetadat_Click(sender As Object, e As EventArgs) Handles mnuColumnMetadat.Click
         mnuViewColumnMetadata.Checked = Not mnuViewColumnMetadata.Checked
         mnuColumnMetadat.Checked = mnuViewColumnMetadata.Checked
+        ucrColumnMeta.IsEnabled = mnuViewColumnMetadata.Checked
         UpdateLayout()
     End Sub
 
@@ -2551,6 +2556,7 @@ Public Class frmMain
 
     Private Sub mnuViewSwapDataAndMetadata_Click(sender As Object, e As EventArgs) Handles mnuViewSwapDataAndMetadata.Click
         mnuViewSwapDataAndMetadata.Checked = Not mnuViewSwapDataAndMetadata.Checked
+        ucrColumnMeta.IsEnabled = mnuViewSwapDataAndMetadata.Checked
         mnuViewSwapDataAndDataframeMetadata.Enabled = Not mnuViewSwapDataAndMetadata.Checked
         mnuViewSwapDataAndScript.Enabled = Not mnuViewSwapDataAndMetadata.Checked
         UpdateSwapDataAndMetadata()
@@ -2947,6 +2953,7 @@ Public Class frmMain
 
     Private Sub mnuSwapDataMetadata_Click(sender As Object, e As EventArgs) Handles mnuSwapDataMetadata.Click
         mnuViewSwapDataAndMetadata.Checked = Not mnuViewSwapDataAndMetadata.Checked
+        ucrColumnMeta.IsEnabled = mnuViewSwapDataAndMetadata.Checked
         UpdateSwapDataAndMetadata()
         UpdateLayout()
     End Sub

instat/ucrColumnMetadata.vb

@@ -32,6 +32,7 @@ Public Class ucrColumnMetadata
     Private strLabelsLabel As String = "labels"
     Private strLabelsScientific As String = "Scientific"
     Private _Refreshed As Boolean = False
+    Private _isEnabled As Boolean
     Private bWideDataSetPromptResponse As DialogResult = DialogResult.None
 
     Public Sub New()
@@ -150,14 +151,23 @@ Public Class ucrColumnMetadata
         _grid.UpdateAllWorksheetStyles()
     End Sub
 
+    Public Property IsEnabled() As Boolean
+        Get
+            Return _isEnabled
+        End Get
+        Set(ByVal value As Boolean)
+            _isEnabled = value
+        End Set
+    End Property
+
     Public Sub RefreshGridData()
         'todo. a temporary useful fix because of wide data sets
         'only refresh the grid when the data book is initialised and the grid is visible
         'displaying more than a 1000 rows takes a lot of time
         'in the long term, this window should have 'paging' feature similar to the data viewer to display 11000 rows only.
-        If _clsDataBook IsNot Nothing And Visible Then
-            _grid.RemoveOldWorksheets()
+        If _clsDataBook IsNot Nothing AndAlso Visible AndAlso _isEnabled Then
             AddAndUpdateWorksheets()
+            _grid.RemoveOldWorksheets()
             _grid.bVisible = _clsDataBook.DataFrames.Count > 0
         End If
     End Sub