Timing of DetailsView Databinding when in AJAX Modal Popup RSS

• • Reply
  

  chadwixk

  Member

  71 Points

  92 Posts

  Timing of DetailsView Databinding when in AJAX Modal Popup

  Feb 14, 2012 02:56 PM|LINK

  Hello,

  Background

  • I have a page with a gridview control and then a detailsview control that is within a modalpopup.
  • When the user clicks on a command button in the gridview, the modal is displayed with a detailsview in INSERT mode.
  • The Gridview RowCommand event is where I am trying to set a literal field which is in the InsertTemplate of the detailsview with a description of the assocated gridview row that was clicked by concatenating various fields from the gridview cells

  Problem

  • This works ONLY AFTER the 1st time I click on a grideview row

  The Issue

  • The DetailsView calls DataBound event AFTER the GridView RowCommand Event, and it is wiping out the literal text value that I just set.
  • The 2nd and third time, etc that this process happens, the DetailsView DataBound event is not fired, so all works as desired.

  Attempted Solutions

  • Since the detailsview is in a popup, I tried to for the databind event in Page Load in hopes it wouldn't fire again the first time it was displayd in the modal. No luck, it still calls DataBound the first time I display it

  Any Other Ideas? (Thanks in Advance!)

  Here is my code (abbreviated)

  <asp:DetailsView ID="dtlEditTrans" runat="server" AutoGenerateRows="False"
                          BackColor="White" BorderColor="#CCCCCC" BorderStyle="None" BorderWidth="1px"
                          CellPadding="4" DataKeyNames="TransactionID"
                          DataSourceID="SqlTransPopUp" GridLines="Horizontal" Width="350px"
                          DefaultMode="Insert" ClientIDMode="Static">
                          <EditRowStyle Font-Bold="True" />
                          <FieldHeaderStyle HorizontalAlign="Left" />
                          <Fields>
                              <asp:BoundField DataField="TransactionID" HeaderText="TransactionID"
                                  InsertVisible="False" ReadOnly="True" SortExpression="TransactionID"
                                  Visible="False" />
                              <asp:BoundField DataField="ModuleID" HeaderText="ModuleID"
                                  SortExpression="ModuleID" InsertVisible="False" />
                              <asp:BoundField DataField="UserID" HeaderText="UserID"
                                  SortExpression="UserID" InsertVisible="False" />
                              <asp:TemplateField HeaderText="Asset To Sell:"
                                  SortExpression="ParentTransactionID">
                                  <EditItemTemplate>
                                      <asp:Literal ID="litAssetDescPop" runat="server"></asp:Literal>
                                  </EditItemTemplate>
                                  <InsertItemTemplate>
                                      TEST:
                                      <asp:Literal ID="litAssetDescPop" runat="server">Buy something</asp:Literal>
                                  </InsertItemTemplate>
                                  <ItemTemplate>
                                      <asp:Literal ID="litAssetDescPop" runat="server"></asp:Literal>
                                  </ItemTemplate>
                              </asp:TemplateField>

  Private Sub grdTransactions_RowCommand(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewCommandEventArgs) Handles grdTransactions.RowCommand
  
              Dim dblCostPerOz As Double
              Dim intVendorID As Integer
  
              Select Case e.CommandName
  
                  Case "Sell"
                      'Gets which row we are dealing with by determining the row that the button clicked (source) was in
                      Dim CurrentGridRow As GridViewRow = DirectCast(DirectCast(e.CommandSource, ImageButton).NamingContainer, GridViewRow)
  
                      'Select the current row and then get values from cells in that row
                      'grdTransactions.SelectedIndex = CurrentGridRow.RowIndex
                      'Dim intTranID As Integer = grdTransactions.SelectedDataKey.Value
                      Dim intTranID As Integer = grdTransactions.DataKeys(CurrentGridRow.RowIndex).Value
                      Dim intMetalTypeIDParent As Integer = CType(CurrentGridRow.FindControl("hidMetalTypeIDParent"), HiddenField).Value
  
                      'Set Popup window title
                      litPopUpTitle.Text = "Sell Metal"
                      'Set Asset Description on Popup
                      Dim strTranDate As String = CType(CurrentGridRow.FindControl("lblTranDate"), Label).Text
                      Dim strMetalTypeDesc As String = CType(CurrentGridRow.FindControl("lblMetalTypeDesc"), Label).Text
                      Dim strOunces As String = CType(CurrentGridRow.FindControl("lblOunces"), Label).Text
                      Dim litAssetPop As Literal = dtlEditTrans.FindControl("litAssetDescPop")
                      litAssetPop.Text = strTranDate + ": " + strMetalTypeDesc + " - " + strOunces + " oz"
  
                      'Save Original Row values off in hidden fields to use later when doing the insert.
                      hidTranID.Value = intTranID
                      hidMetalTypeID.Value = intMetalTypeIDParent
                      hidTranTypeID.Value = 2 '1 = buy 2 = sale
  
                      'Show popup to input sale data
                      pnlSellPopup_ModalPopupExtender.Show()
                      dtlEditTrans.Fields(3).Visible = True 'Asset To Sell
  
  
                      dtlEditTrans.Fields(6).Visible = False 'MetalTypeID
  
              End Select
  
          End Sub

  UPDATE: Well I found that it is the hiding of fields (dtlEditTrans.Fields(6).Visible = False) that causes the renewed call to databind, but it doesn't call it right away, it waits until the Grid RowCommand event finishes....so you can't make any changes to the details view in that routine. You have to either not manipulate the fields or do the field updates in another routine, in this case, I did it in the DetailsView PreRender....but you have to save some needed values first in the GridView RowCommand event into hidden fields, so you can later retrieve them in PreRender of the Details View.

  • Edited by chadwixk on Feb 15, 2012 04:28 PM
  • Marked as answer by Qin Dian Tang - MSFT on Feb 16, 2012 07:55 AM