Using class in masterpage RSS

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  leonaisse

  Member

  40 Points

  77 Posts

  Using class in masterpage

  Nov 27, 2012 01:14 PM|LINK

  Hi

  I have a master page called basemasterpage which has a modalpopextender called mpuEmail

  <asp:ContentPlaceHolder ID="mainContent" runat="server">
                      <asp:UpdatePanel ID="UpdatePanel1" runat="server">
                          <ContentTemplate>
                              <asp:Panel ID="emailPanel" runat="server">
                                  <uc:emailPopup ID="ucemailPopup" runat="server" />
                              </asp:Panel>
                          </ContentTemplate>
                      </asp:UpdatePanel>
                      <cc1:ModalPopupExtender ID="mpuEmail" runat="server" PopupControlID="emailPanel" TargetControlID="btnHdn"></cc1:ModalPopupExtender>
                      <asp:Button ID="btnHdn" runat="server" Text="Button" Visible="false" />
                  </asp:ContentPlaceHolder>

  basemasterpage has a class in its code behind

  Public Class MyMaster
      Inherits BaseMasterPage
      Public Sub ShowModal(showHide As String)
          If showHide = "Show" Then
              mpuEmail.Show()
          ElseIf showHide = "Hide" Then
              mpuEmail.Hide()
          End If
      End Sub

  And in temp.aspx.vb i have the following sub

   

    Public Sub ShowModal(showhide As String)
          Dim masterPage As MyMaster = TryCast(Page.Master, MyMaster)
          masterPage.ShowModal(showhide)
      End Sub

  
  Finally on a button click also in temp.aspx.vb, I have the following code

  Protected Sub Button1_Click(sender As Object, e As EventArgs)
          ShowModal("Hide")
  
  
      End Sub

  I get an object not set to an instance error on the masterPage.ShowModal(showhide)  line.

   

  Any ideas?

  Thank you so much i've been on this for hours.

   

  Leonaisse

   

  • Edited by leonaisse on Nov 28, 2012 11:33 AM
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  chetan.sarod...

  All-Star

  65839 Points

  11163 Posts

  Re: Using class in masterpage

  Nov 28, 2012 02:18 AM|LINK

  If youa re getting an error " object not set to an instance" at masterPage.ShowModal(showhide)  line, means masterPage object is null

  Try to debug your code, set breakpoint @ Dim masterPage As MyMaster = TryCast(Page.Master, MyMaster), see if masterPage object is not null

  http://forums.asp.net/t/1850042.aspx/1

  http://forums.asp.net/t/1822622.aspx/1

  Chetan Sarode
  Senior Software Engineer,
  Approva Systems Pvt Ltd, Pune, India.
  
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  leonaisse

  Member

  40 Points

  77 Posts

  Re: Using class in masterpage

  Nov 28, 2012 11:33 AM|LINK

  Thanks Chetan

  I have debugged it and its not the master. Ive changed it slightly so that the button click calls a Public Sub in the Masterpage. I can get to the sub but the sub cant find the modal? I'm pretty sure its all a problem with finding the modal.

  Modal in basemasterpage

  <asp:ContentPlaceHolder ID="mainContent" runat="server">
                         <asp:Panel ID="emailPanel" runat="server">
                          <uc:emailPopup ID="ucemailPopup" runat="server" />
                      </asp:Panel>
  
                      <cc1:ModalPopupExtender ID="mpuEmail" runat="server" PopupControlID="emailPanel" TargetControlID="btnHdn"></cc1:ModalPopupExtender>
                      <asp:Button ID="btnHdn" runat="server" Text="Button" Visible="False" />
                  </asp:ContentPlaceHolder>

  Public sub in basemasterpage code behind (I get a object set to nothing.. error on mpuEmail.show()) Everything else stacks up? So i'm sure this sub cant find the modal. I've tried to use findcontrol but that doesnt find it. Intellisense can find it ok?

   

    Public Sub ShowModal(showHide As String)
          If showHide = "Show" Then
              mpuEmail.Show()
          ElseIf showHide = "Hide" Then
              mpuEmail.Hide()
          End If
      End Sub

  Code on button click in aspx code behind

    Dim master1 = TryCast(Me.Master, BaseMasterPage)
          If master1 IsNot Nothing Then
              master1.ShowModal("Show")
          End If

  
  Any further ideas - ive been trying to get this to popup for days. If i move the the modal out of the contentplaceholder it wont hide. Is it becasue the modal is in the contentplaceholder?

  Any help would be appreciated.

   

  Thanks

   

  leonaisse

  • Edited by leonaisse on Nov 28, 2012 11:33 AM
• • Reply
  

  leonaisse

  Member

  40 Points

  77 Posts

  Re: Using class in masterpage

  Nov 29, 2012 08:57 AM|LINK

  I solved this after many days messing around.

  Basically I moved the Asp:panel and modal out of the Master pages contentplaceholder and into the main body of the Master page.

  I added style="display:none" to the hidden button used as the targetcontrolID for the modal. Setting Visible="False" wouldnt allow the modal to work.

  Added a Public Sub to the masterpage (basemasterpage) code behind

  Public Sub ShowModal(showHide As String)
          If showHide = "Show" Then
              mpuEmail.Show()
          ElseIf showHide = "Hide" Then
              mpuEmail.Hide()
          End If
      End Sub

  And then from my content page could show or hide the modal with

    Dim master1 = TryCast(Me.Master, BaseMasterPage)
          If master1 IsNot Nothing Then
              master1.ShowModal("Show")
          End If

  
  It was that simple!!!!!

  Thanks to all that helped!!

   

  Leonaisse

   

   

   

   

   

   

  • Marked as answer by leonaisse on Nov 29, 2012 08:57 AM