Gridview does not display - asp.net

Question

The gridview on my page is set up with templat fields in each column so that I can enter information and save it to my database. There is no data that ties directly into the gridview just the ability to add multiple rows at a time to save the data. I had it displayed with empty textboxes and it was working fine and all of a it stopped and now won't show up. Any clues as to what is happening. Code follows...
<asp:GridView ID="gvOLIAdj" runat="server" AutoGenerateColumns="False" CssClass="td8" CellPadding="4" ForeColor="#333333" PageSize="5" ViewStateMode="Enabled">
<AlternatingRowStyle BackColor="White" ForeColor="#284775" />
<Columns>
<asp:TemplateField HeaderText="Approval Date ">
<EditItemTemplate>
<asp:Label ID="Label5" runat="server"></asp:Label>
</EditItemTemplate>
<ItemTemplate>
<asp:TextBox ID="txtAdjAppr" runat="server" CausesValidation="True"></asp:TextBox>
<asp:MaskedEditExtender ID="txtAdjApprt_MaskedEditExtender" runat="server" ClearMaskOnLostFocus="False" ClipboardEnabled="False" Mask="99/99/99" TargetControlID="txtAdjAppr" />
</ItemTemplate>
<ItemStyle HorizontalAlign="Center" VerticalAlign="Middle" Width="125px" />
</asp:TemplateField>
<asp:TemplateField HeaderText="Total Amount">
<EditItemTemplate>
<asp:Label ID="Label2" runat="server"></asp:Label> </EditItemTemplate>
<ItemTemplate>
<asp:TextBox ID="txtAdjAmt" runat="server" CausesValidation="True"></asp:TextBox>
</ItemTemplate>
<ItemStyle HorizontalAlign="Right" VerticalAlign="Middle" Width="225px" />
</asp:TemplateField>
<asp:TemplateField HeaderText="Comments">
<EditItemTemplate>
<asp:Label ID="Label3" runat="server"></asp:Label>
</EditItemTemplate>
<ItemTemplate>
<asp:TextBox ID="txtCmmts" runat="server" Width="599" CausesValidation="True"></asp:TextBox>
</ItemTemplate>
<ItemStyle HorizontalAlign="Left" VerticalAlign="Middle" />
</asp:TemplateField>
<asp:TemplateField>
<EditItemTemplate>
<asp:Label ID="Label4" runat="server"></asp:Label>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="lblInitials" runat="server"></asp:Label>
</ItemTemplate>
<ItemStyle HorizontalAlign="Center" VerticalAlign="Middle" Width="35px" />
</asp:TemplateField>
</Columns>
<EditRowStyle BackColor="#999999" />
<FooterStyle BackColor="#003399" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="#003399" Font-Bold="True" ForeColor="White" />
<RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
<SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
<SortedAscendingCellStyle BackColor="#E9E7E2" />
<SortedAscendingHeaderStyle BackColor="#506C8C" />
<SortedDescendingCellStyle BackColor="#FFFDF8" />
<SortedDescendingHeaderStyle BackColor="#6F8DAE" />
</asp:GridView>

Answer 1

Potential causes:
You are not setting to edit mode, gvOLIAdj.EditIndex = 1;
CssClass="td8" is set to display:none/visibility:hidden
gvOLIAdj.Visible=False is
being set
You upgraded your framework, see below
GridView sets EditIndex property when in previous .NET versions it didn't

Answer 2

Gridviews must be bound to a datasource of somesort, the view you see in the designer is only an estimation of what the gridview will look like.