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Gridview - OldValues collection from ExtractValuesFromCell method contains NewValues

9 New Member
Hello

I am having problems extracting the OldValues collection from the RowUpdating event in my GridView.

Every time I access this I am getting the values from the NewValues collection in both OldValues and NewValues. I am fairly sure that the data is not being rebound prior to the updating event.

I have posted my code below.

Thanks in advance.


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  1. <asp:Panel ID="pnlShowDelays" runat="server" Visible="true" CssClass="pnlLJDel">
  2.                 <div id="div1" class="divDelays">
  3.                     <asp:GridView ID="gvDelays" runat="server" GridLines="None" CellSpacing="1" DataKeyNames="id"
  4.                         OnRowCancelingEdit="gvDelays_RowCancelingEdit" OnRowEditing="gvDelays_RowEditing"
  5.                         OnRowUpdating="gvDelays_RowUpdating">
  6.                         <Columns>
  7.                             <asp:TemplateField HeaderText="Note Text">
  8.                                 <EditItemTemplate>
  9.                                     <asp:TextBox Font-Size="8pt" ID="txComm" TextMode="multiLine" runat="server" Text='<%# Bind("note_type_description") %>'></asp:TextBox>
  10.                                 </EditItemTemplate>
  11.                                 <HeaderStyle HorizontalAlign="Left" />
  12.                                 <ItemTemplate>
  13.                                     <asp:Label ID="lblComm" Font-Size="8pt" runat="server" Text='<%# Eval("note_type_description") %>'></asp:Label>
  14.                                 </ItemTemplate>
  15.                                 <ItemStyle VerticalAlign="Top" HorizontalAlign="Left" />
  16.                             </asp:TemplateField>
  17.                             <asp:CommandField HeaderText="Edit/Update" ButtonType="Image" ShowEditButton="True"
  18.                                 CancelImageUrl="~/images/RowCancel.gif" EditImageUrl="~/images/RowEdit.gif" UpdateImageUrl="~/images/RowUpdate.gif" />
  19.                         </Columns>
  20.                         <FooterStyle CssClass="gridViewFooterStyle" />
  21.                         <RowStyle CssClass="gridViewRowStyle" />
  22.                         <EditRowStyle CssClass="gridEditRowStyle" />
  23.                         <SelectedRowStyle CssClass="gridViewSelectedRowStyle" />
  24.                         <PagerStyle CssClass="gridViewPagerStyle" HorizontalAlign="Center" />
  25.                         <HeaderStyle CssClass="gridViewHeaderStyle" />
  26.                         <AlternatingRowStyle CssClass="gridViewAlternatingRowStyle" />
  27.                     </asp:GridView>
  28.                     &nbsp;
  29.                 </div>
  30.             </asp:Panel>
  31.  
  32.  
  33.  
  34.  
  35. public partial class TestPage : System.Web.UI.Page
  36.     {
  37.         protected void Page_Load(object sender, EventArgs e)
  38.         {
  39.             if (!Page.IsPostBack)
  40.             {
  41.                 loadGrid();
  42.             }
  43.         }
  44.  
  45.         protected void loadGrid()
  46.         {
  47.             SQLCons sq = new SQLCons();
  48.             Note_types nt = new Note_types();
  49.             nt.Get_NOTE_TYPES();
  50.             loadDelay(nt.RetDataSet);
  51.         }
  52.  
  53.         protected void BindData()
  54.         {
  55.             gvDelays.DataSource = null;
  56.             gvDelays.DataBind();
  57.             gvDelays.DataSource = (DataSet)Session["dsDelays"];
  58.             gvDelays.DataBind();
  59.         }
  60.  
  61.         protected void loadDelay(DataSet ds)
  62.         {
  63.             Session["dsDelays"] = ds;
  64.             BindData();
  65.         }
  66.  
  67.         protected void gvDelays_RowUpdating(object sender, GridViewUpdateEventArgs e)
  68.         {
  69.             DataControlFieldCell NewCell = gvDelays.Rows[e.RowIndex].Cells[0] as DataControlFieldCell;
  70.  
  71.             gvDelays.Columns[0].ExtractValuesFromCell(
  72.                 e.NewValues,
  73.                 NewCell,
  74.                 DataControlRowState.Edit,
  75.                 true);
  76.  
  77.             gvDelays.Columns[0].ExtractValuesFromCell(
  78.                 e.OldValues,
  79.                 NewCell,
  80.                 DataControlRowState.Edit,
  81.                 true);
  82.  
  83.  
  84.  
  85.             foreach (string key in e.OldValues.Keys)
  86.             {
  87.                 string s = e.OldValues[key].ToString();
  88.             }
  89.  
  90.             foreach (string key in e.NewValues.Keys)
  91.             {
  92.                 string s = e.NewValues[key].ToString();
  93.             }
  94.         }
  95.  
  96.         protected void gvDelays_RowEditing(object sender, GridViewEditEventArgs e)
  97.         {
  98.             gvDelays.EditIndex = e.NewEditIndex;            
  99.             BindData();  
  100.         }
  101.  
  102.         protected void gvDelays_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
  103.         {
  104.             gvDelays.EditIndex = -1;           
  105.             BindData();
  106.         }
  107.     }
  108.  
  109.  
Jun 23 '08 #1
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