I was having interesting issues trying to get a query string to work. I was using the method Return DotNetNuke.Common.NavigateURL(Me.TabId, arrayOfStrings)

The link returned inserted "ctl/(control_id/" into the string.  With this string, the page requested will not execute page load. I can insert a break point, and it will not hit. If I remove ctl/58  (whatever the control id is), then the query string works.  I have a regex expression to remove the ctl/id from the string.  But I am thinking there must be some overload that does this automatically.

I am using the following code inorder to get a QueryString to work (I had to HACK):

''' <summary>
        '''
        ''' </summary>
        ''' <param name="countryAbbreviation">The value for the country query parameter</param>
        ''' <param name="regionAbbreviation">The value for the region query parameter</param>
        ''' <param name="cityName">The value for the city query parameter</param>
        ''' <returns>DNN NavigateUrl QueryString</returns>
        ''' <remarks>jfs 08-31-07</remarks>
        Private Function BuildNavigateUrl(ByVal countryAbbreviation As String, _
            ByVal regionAbbreviation As String, ByVal cityName As String) As String
            Dim navUrl As String = DotNetNuke.Common.NavigateURL()

            Dim params As New Generic.List(Of String)()
            If Not countryAbbreviation Is Nothing Then
                If Not String.IsNullOrEmpty(countryAbbreviation) Then
                    params.Add(String.Concat(CountryKeyName, "=", countryAbbreviation))
                    If Not regionAbbreviation Is Nothing Then
                        If Not String.IsNullOrEmpty(regionAbbreviation) Then
                            params.Add(String.Concat(RegionKeyName, "=", regionAbbreviation))
                            If Not cityName Is Nothing Then
                                If Not String.IsNullOrEmpty(cityName) Then params.Add(String.Concat(CityKeyName, "=", cityName))
                            End If
                        End If
                    End If
                End If
            End If

            Dim arrayOfStrings(params.Count) As String
            Dim i As Integer = 0
            For Each param As String In params
                arrayOfStrings(i) = param
                i += 1
            Next

            'Return DotNetNuke.Common.NavigateURL(Me.TabId, arrayOfStrings)
            Return Regex.Replace(DotNetNuke.Common.NavigateURL(Me.TabId, arrayOfStrings), "ctl/\w\d*/", "")

        End Function

Has anyone had issues with a FriendlyUrl QueryString?  With this RegularExpress, all my query strings are now working in FriendlyURL format.

The question is WHY is the ctl=value parameter being inserted for me?  It mirrors the tab id in my case, and one reason this have misfired is likely the value of ctl may not be valid. I did not look into the DB to find out.  Any thoughts on this would be appreciated. Thank you.

Right you are!  I also modified the Regex Expression.  Here is what I use:

Dim key As String = String.Format("mid={0}", Me.ModuleId) 'This can be that empty string you speak of
            If (arrayOfStrings.Length >= 1) Then
                Return Regex.Replace(DotNetNuke.Common.NavigateURL(Me.TabId, key, arrayOfStrings), "ctl/?\d*?/mid/", "")
                'Return DotNetNuke.Common.NavigateURL(Me.TabId, key, arrayOfStrings)
            Else
                Return NavigateURL(Me.TabId)
            End If