GridView.BottomPagerRow Property RSS

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  bhavin78

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  GridView.BottomPagerRow Property

  Oct 24, 2006 07:11 PM|LINK

  I am following the article http://msdn2.microsoft.com/en-us/library/system.web.ui.webcontrols.gridview.bottompagerrow.aspx from microsoft on GridView.BottomPagerRow Property 

  I get below error on this line.
  Dim pageList As DropDownList = CType(pagerRow.Cells(0).FindControl("PageDropDownList"), DropDownList)

  System.NullReferenceException was unhandled by user code
    Message="Object reference not set to an instance of an object."
    Source="App_Web_jwbpeixv"
    StackTrace:
         at UnProcessedClaims.gvparts_DataBound(Object sender, EventArgs e) in C:\Inetpub\wwwroot\NaccoSRS\UnProcessedClaims.aspx.vb:line 129
         at System.Web.UI.WebControls.BaseDataBoundControl.OnDataBound(EventArgs e)
         at System.Web.UI.WebControls.DataBoundControl.OnDataSourceViewSelectCallback(IEnumerable data)
         at System.Web.UI.DataSourceView.Select(DataSourceSelectArguments arguments, DataSourceViewSelectCallback callback)
         at System.Web.UI.WebControls.DataBoundControl.PerformSelect()
         at System.Web.UI.WebControls.BaseDataBoundControl.DataBind()
         at System.Web.UI.WebControls.GridView.DataBind()
         at System.Web.UI.WebControls.BaseDataBoundControl.EnsureDataBound()
         at System.Web.UI.WebControls.CompositeDataBoundControl.CreateChildControls()
         at System.Web.UI.Control.EnsureChildControls()
         at System.Web.UI.Control.PreRenderRecursiveInternal()
         at System.Web.UI.Control.PreRenderRecursiveInternal()
         at System.Web.UI.Control.PreRenderRecursiveInternal()
         at System.Web.UI.Control.PreRenderRecursiveInternal()
         at System.Web.UI.Control.PreRenderRecursiveInternal()
         at System.Web.UI.Control.PreRenderRecursiveInternal()
         at System.Web.UI.Control.PreRenderRecursiveInternal()
         at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
  

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  albertpascua...

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  Re: GridView.BottomPagerRow Property

  Oct 24, 2006 07:15 PM|LINK

  Can you post the aspx page?

  Normally would be that PageDropDownList is not in the page

  Cheers
  Al
  My Blog
  
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  bhavin78

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  Re: GridView.BottomPagerRow Property

  Oct 24, 2006 07:43 PM|LINK

  <asp:GridView ID="gvparts" runat="server" AutoGenerateColumns="False" DataSourceID="odsUnProcessedClaims" ondatabound="gvParts_DataBound" EmptyDataText="NoRecordFound" DataKeyNames="Claim_Number" AllowPaging="True">
  <PagerStyle ForeColor="Blue" BackColor="LightBlue" />
  <pagerstyle forecolor="Blue"backcolor="LightBlue" />
  <pagertemplate>
  <table width="100%">
  <tr>
  <td width="70%">
  <asp:label id="MessageLabel" forecolor="Blue" text="Select a page:" runat="server"/>
  <asp:dropdownlist id="PageDropDownList" autopostback="true" onselectedindexchanged="PageDropDownList_SelectedIndexChanged" runat="server"/>
  </td>
  <td width="70%" align="right">
  <asp:label id="CurrentPageLabel" forecolor="Blue" runat="server"/></td></tr> </table></pagertemplate>
  <Columns>
  </Columns>
  </asp:GridView>

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  mase_dawg

  Member

  80 Points

  16 Posts

  Re: GridView.BottomPagerRow Property

  Oct 24, 2006 07:52 PM|LINK

  Is your BottomRowPager visibility on? 

  Also, I would just try doing this instead of creating a row and finding the control in the row:

  DropDownList ddl1 = Ctype(gvparts.BottomPagerRow.FindControl("PageDropDownList"), DropDownList)

  GridView BottomPagerRow

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  bhavin78

  Contributor

  2697 Points

  586 Posts

  Re: GridView.BottomPagerRow Property

  Oct 24, 2006 08:05 PM|LINK

  I tried that code and it gives me the same error

  System.NullReferenceException was unhandled by user code
    Message="Object reference not set to an instance of an object."
    Source="App_Web_jy3t8pb5"
    StackTrace:
         at UnProcessedClaims.gvparts_DataBound(Object sender, EventArgs e) in C:\Inetpub\wwwroot\NaccoSRS\UnProcessedClaims.aspx.vb:line 130
         at System.Web.UI.WebControls.BaseDataBoundControl.OnDataBound(EventArgs e)
         at System.Web.UI.WebControls.DataBoundControl.OnDataSourceViewSelectCallback(IEnumerable data)
         at System.Web.UI.DataSourceView.Select(DataSourceSelectArguments arguments, DataSourceViewSelectCallback callback)
         at System.Web.UI.WebControls.DataBoundControl.PerformSelect()
         at System.Web.UI.WebControls.BaseDataBoundControl.DataBind()
         at System.Web.UI.WebControls.GridView.DataBind()
         at System.Web.UI.WebControls.BaseDataBoundControl.EnsureDataBound()
         at System.Web.UI.WebControls.CompositeDataBoundControl.CreateChildControls()
         at System.Web.UI.Control.EnsureChildControls()
         at System.Web.UI.Control.PreRenderRecursiveInternal()
         at System.Web.UI.Control.PreRenderRecursiveInternal()
         at System.Web.UI.Control.PreRenderRecursiveInternal()
         at System.Web.UI.Control.PreRenderRecursiveInternal()
         at System.Web.UI.Control.PreRenderRecursiveInternal()
         at System.Web.UI.Control.PreRenderRecursiveInternal()
         at System.Web.UI.Control.PreRenderRecursiveInternal()
         at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
  

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  albertpascua...

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  Re: GridView.BottomPagerRow Property

  Oct 24, 2006 10:17 PM|LINK

  Actually look at your page, the dropdown is not on Cell(0) in on Cell(1) do something like this to check

   

  for(int i=0 ; e.Cell.Count; i++)

  {

  DropDownList = (DropDownList )e.Cell[i].FindControl("DropDown1");

  if ( DropDownList  != null)

  break;

  }

   

  This is in C#, this will tell you where is the dropdown

  Cheers
  Al
  My Blog
  
  • Edited by rexlin on Oct 25, 2006 01:25 AM
  • Edited by rexlin on Oct 26, 2006 02:57 AM
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  bhavin78

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  586 Posts

  Re: GridView.BottomPagerRow Property

  Oct 25, 2006 02:32 PM|LINK

  I tried the below code with different option but still get the same error.

  Sub gvparts_DataBound(ByVal sender As Object, ByVal e As EventArgs)

  Dim pagerRow As GridViewRow = gvparts.BottomPagerRow
  'Dim pageList As DropDownList = CType(pagerRow.Cells(1).FindControl("PageDropDownList"), DropDownList)
  'Dim pageList As DropDownList = CType(gvparts.BottomPagerRow.FindControl("PageDropDownList"), DropDownList)

  'Dim pageLabel As Label = CType(pagerRow.Cells(0).FindControl("CurrentPageLabel"), Label)

          Dim pagerRow As GridViewRow = gvparts.BottomPagerRow

          Dim pageList As DropDownList

          Dim i As Integer = 0

          While pagerRow.Cells.Count

              pageList = CType(pagerRow.Cells(i).FindControl("DropDown1"), DropDownList)

              If Not (pageList Is Nothing) Then

                  Exit While

              End If

              System.Math.Min(System.Threading.Interlocked.Increment(i), i - 1)

          End While

   

          If Not pageList Is Nothing Then

              Dim n As Integer

              For n = 0 To gvparts.PageCount - 1

                 Dim pageNumber As Integer = i + 1

                  Dim item As ListItem = New ListItem(pageNumber.ToString())

                  If n = gvparts.PageIndex Then

                      item.Selected = True

                  End If

                  pageList.Items.Add(item)

              Next n

          End If

         

   

      End Sub

   

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  mase_dawg

  Member

  80 Points

  16 Posts

  Re: GridView.BottomPagerRow Property

  Oct 26, 2006 07:29 PM|LINK

  Are you SURE that your BottomPagerRow.Visibility = true????  It must be visible or it will never get rendered to the browser.

  Also, start the debugger and step through the process. See if pagerRow is null or if the BottomPagerRow was actually returned.
  

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  bhavin78

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  2697 Points

  586 Posts

  Re: GridView.BottomPagerRow Property

  Oct 27, 2006 03:05 PM|LINK

  This is what I did and get error on that line. use the new key word to create instanse of an object. 

  Sub gvparts_DataBound(ByVal sender As Object, ByVal e As EventArgs)

  gvparts.BottomPagerRow.Visible = True

  ...

  end sub

  Is there some other place I can configure bottompagerrow property.

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  bhavin78

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  586 Posts

  Re: GridView.BottomPagerRow Property

  Oct 27, 2006 04:05 PM|LINK

  I am not sure why its not working, I have being trying many different things.
  Can I email you the file and you can check for me?