How to put some hidden column in a DataGrid?

[Nicky]

hi, all
I got another quesiton, in my DataGrid control, I want to have a hidden
column which will contian an ID value, I don't want to display this ID value
to user, but I need it when user click it. The problem I got is when I
uncheck the "visible" checkbox, it seems DataGrid does not render it at all.
So how to do this hidden column?
Thanks

[Shawn]

Hi.
I always put my ID's in a label:
<asp:TemplateCo lumn>
<ItemTemplate >
<asp:Label id="lblID" runat="server" Visible="False" Text='<%#
DataBinder.Eval (Container.Data Item, "id") %>'>
</asp:Label>
</ItemTemplate>
</asp:TemplateCol umn>

You can get your ID's from codebehind, like this:
For Each dgi In arrayListDataGr idItems
..
myID = CType(dgi.FindC ontrol("lblID") , Label).Text
..
Next

Hope this helps,
Shawn

"Nicky" <Ni***@discussi ons.microsoft.c om> wrote in message
news:57******** *************** ***********@mic rosoft.com...

hi, all
I got another quesiton, in my DataGrid control, I want to have a hidden
column which will contian an ID value, I don't want to display this ID value to user, but I need it when user click it. The problem I got is when I
uncheck the "visible" checkbox, it seems DataGrid does not render it at all. So how to do this hidden column?
Thanks

[DotNetJerome]

Hi Nicky,

The autogenerated coulmns of DataGrid are not part og the columns
collection...so you can't hide those columns just as follows

MyDataGrid.Colu mns(1).Visible = False

So the place to handle this is in the ItemDataBound event of the Datagrid:

<asp:DataGrid id="MyDatagrid " runat="server" AutoGenerateCol umns="True"
OnItemDataBound ="MyDatagrid_On ItemDataBound"/>

Private Sub MyDataGrid_Item DataBound(s As Object, e As DatagridItemEve ntArgs)
e.Item.Cells(1) .Visible = False
End Sub
Cheers,

Jerome. M
"Nicky" wrote:

hi, all
I got another quesiton, in my DataGrid control, I want to have a hidden
column which will contian an ID value, I don't want to display this ID value
to user, but I need it when user click it. The problem I got is when I
uncheck the "visible" checkbox, it seems DataGrid does not render it at all.
So how to do this hidden column?
Thanks

[S h a u n]

Hey Nicky,

If you are defining your columns in the ASPX page then try this out :-

<Columns>
<asp:BoundColum n Visible="False" DataField="Cand idateId"
HeaderText="Can didate Id">
<ItemStyle Height="10px" Width="10px"></ItemStyle>
</asp:BoundColumn >
<asp:ButtonColu mn Text="Select" DataTextField=" FullName"
SortExpression= "FullName" HeaderText="Ful l Name">
<ItemStyle Width="300px"></ItemStyle>
and you can access the first column by

candidateNo = e.Item.Cells[0].Text ;

*************** **************
Hope This Helps,
Shaun (M.C.P)

http://blogs.wwwcoder.com/shaunakp
*************** **************

"Nicky" wrote:

hi, all
I got another quesiton, in my DataGrid control, I want to have a hidden
column which will contian an ID value, I don't want to display this ID value
to user, but I need it when user click it. The problem I got is when I
uncheck the "visible" checkbox, it seems DataGrid does not render it at all.
So how to do this hidden column?
Thanks

[Eliyahu Goldin]

Thta's right, if Visible=false the column doesn't get rendered. Hide it with
css style display:none.

Eliyahu

"Nicky" <Ni***@discussi ons.microsoft.c om> wrote in message
news:57******** *************** ***********@mic rosoft.com...

hi, all
I got another quesiton, in my DataGrid control, I want to have a hidden
column which will contian an ID value, I don't want to display this ID value to user, but I need it when user click it. The problem I got is when I
uncheck the "visible" checkbox, it seems DataGrid does not render it at all. So how to do this hidden column?
Thanks