Hi all,

I have a control were I dynamically add child controls, ascx pages, to a placeholder based on a menu selection. I finally have the controls working properly but my child controls contain submit and cancel linkbuttons. All the events fire fine but my response.redirect throws a "Object reference not set to an instance of an object" error. I use the same redirect statement in the main control and everything works fine so I know it works. I need this to work to redirect back to a main control. I have included to code below for the main control and the child control.

Thanks....

----------------------------------This is the entire error--------------------------------------


InnerException: System.NullReferenceException: Object reference not set to an instance of an object. at DotNetNuke.Exceptions.ProcessModuleLoadException(PortalModuleControl ctrlModule, Exception exc) 


at LCGI.DNN.Modules.PTT.Company_Settings.cmdCancel_Click(Object sender, EventArgs e)


in C:\Virtual Directories\2.2\DesktopModules\PTT\Controls\Company_Settings.ascx.vb:line 179 at System.Web.UI.WebControls.LinkButton.OnClick(EventArgs e) 


at System.Web.UI.WebControls.LinkButton.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) 


at System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) 


at System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) at System.Web.UI.Page.ProcessRequestMain()











-----------------------------------------Main Control-------------------------------------------





Private Sub ctlDashboard_MenuClick(ByVal ID As String) Handles ctlDashboard.MenuClick


            _MenuID = Convert.ToInt32(ID)


            Session("MenuID") = _MenuID


            _MenuClick = 1


            LoadPTTControl()


        End Sub





        Sub LoadPTTControl()


            Dim controlName As String = "Main.ascx"


            If _MenuClick = 1 Then


                Response.Redirect(NavigateURL(), True)


            End If


            Select Case _MenuID


                Case 1


                    controlName = "Main.ascx"


                Case 50


                    controlName = "Company_Settings.ascx"


            End Select





            contentControl = Page.LoadControl(("~/DesktopModules/PTT/Controls/" & controlName))


            plhContent.Controls.Clear()


            plhContent.Controls.Add(contentControl)


            contentControl.ID = "ctlContent"


        End Sub 'LoadTab








-----------------------------------------Child Control-------------------------------------------





Private Sub cmdCancel_Click(ByVal sender As Object, ByVal e As EventArgs) Handles cmdCancel.Click


            Try


                Session("MenuID") = 1


                Response.Redirect(NavigateURL(), True)


            Catch exc As Exception


                ProcessModuleLoadException(Me, exc)


            End Try


        End Sub

Try using this:

HttpContext.Current.Response.Redirect(...)

Still get the same error. Not sure why the same code works if I run the control as a parent control but as soon as I make it a child it bombs.

System.NullReferenceException: Object reference not set to an instance of an object

looks like NavigateURL() is culprit in your case. check if it returns the value you are expecting.

I have checked the value and is as it should be. I even tried using a literal and it still failed.

Does your Company_Settings Class inherit from UserControl or just from Control?

Edit: Oops, just noticed that it's a .ascx and so obviously inherits from UserControl!