Re: "Dynamic" form -- how to?


Brett Wiltshire wrote:
A DataGrid seems like the right choice to me.

You didn't mention *why* you're stuck ... which is a something of an
impediment to further advice ... :-)

Yeah, I was just wondering if anyone had ever done such a thing and
what their experiences were.

However, I've now run into several problems. Here's how I'm now doing
the datagrid:

<asp:datagrid id="dgMemberList" runat="server"
AutoGenerateColumns="False" Width="100%">
<Columns>

<asp:TemplateColumn HeaderText="Last Name">
<ItemTemplate>
<asp:TextBox runat="server" id="txtLastName" Text='' />
<asp:RequiredFieldValidator id="rfLastName"
ControlToValidate="txtLastName" Text="The last name field is required!"
runat="server" Display="None" EnableClientScript="false" />
</ItemTemplate>
</asp:TemplateColumn>

<asp:TemplateColumn HeaderText="Gender">
<ItemTemplate>
<asp:DropDownList id="ddGender"
runat="server"></asp:DropDownList>
<asp:RequiredFieldValidator id="rfGender"
ControlToValidate="ddGender" Text="The Gender field is required!"
runat="server" Display="None" EnableClientScript="false" />
</ItemTemplate>
</asp:TemplateColumn>

</Columns>
</asp:datagrid>

<asp:Button id="cmdSubmit" Text=" Continue " runat="server" />

<asp:ValidationSummary id="lblSummary" runat="server"
ShowMessageBox="false" HeaderText="Errors are as
follows:"></asp:ValidationSummary>

1. I want to populate ddGender with data from the database (*), however
when I tried to it didn't work:

ddGender.Items.Insert(0, new ListItem( "Male" , "1" ) );
ddGender.Items.Insert(0, new ListItem( "Female" , "2" ) );

Result: " System.NullReferenceException: Object reference not set to an
instance of an object." I'm guessing that I need to loop through the
Items collection of the DataGrid and access each filed that way?

(*) Yes I know that this is silly when it comes to gender, but there
are other fields like nationality that do come from the database, and
anyway I do need to fill ddGender with data.

2. When I click the submit button, I do get to see the title of the
lblSummary, but no actual errors. I'm guessing that a similar problem
is happening here: the RequiredFieldValidator cannot find the control
it is supposed to check?

Reason I'm not debugging with VisualStudio: I'm at home and I don't
have VS installed here.

--
BVH

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