I've spent loads of time Googling to try to work this one out and I'm
sure it's something obvious.
I get an InvalidOperationException reading "Databinding methods such as
Eval(), XPath(), and Bind() can only be used in the context of a
databound control" when I start my page. Unless I'm missing something
obvious, this is *not* the same issue as the "2-way databinding
cascading lists" issue in
http://www.webswapp.com/codesamples/...s/default.aspx
(which is linked from everywhere; I kinda wish that were my problem ;o)
I have a templated databound custom server control, that I've built
with
a great deal of help from the two articles by 4GuysFromRolla's Scott
Mitchell (http://masl.to/?S11823B6D and http://masl.to/?P40821B6D, both
on msdn.microsoft.com).
I don't seem to be able to use databinding syntax, however:
<ItemTemplate>
<asp:TableCell runat="server"><%# Eval("First")
%></asp:TableCell>
...
</ItemTemplate>
bound to a List<Pairgives me an exception:
[InvalidOperationException: Databinding methods such as Eval(),
XPath(),
and Bind() can only be used in the context of a databound control.]
System.Web.UI.Page.GetDataItem() +90
System.Web.UI.TemplateControl.Eval(String expression) +110
ASP.owentest_aspx.__DataBind__control8(Object sender, EventArgs e)
in
c:\Projects\Customisation\RedesignProtoTypeWeb\Owe ntest.aspx:13
System.Web.UI.Control.OnDataBinding(EventArgs e) +80
System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +198
System.Web.UI.Control.DataBind() +12
System.Web.UI.Control.DataBindChildren() +214
System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +208
System.Web.UI.Control.DataBind() +12
System.Web.UI.Control.DataBindChildren() +214
System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +208
System.Web.UI.Control.DataBind() +12
uSwitch.Web.UI.Lego.RepeatingInputRow.CreateItem(I nt32 rowIndex,
Table container, Boolean useDataBinding, Object rowData) in
C:\Projects\uSwitch.Web\UI.Lego\InputModule\Repeat ingInputRow.cs:361
uSwitch.Web.UI.Lego.RepeatingInputRow.CreateContro lHierarchy(Boolean
useDataBinding) in
C:\Projects\uSwitch.Web\UI.Lego\InputModule\Repeat ingInputRow.cs:452
uSwitch.Web.UI.Lego.RepeatingInputRow.DataBind() in
C:\Projects\uSwitch.Web\UI.Lego\InputModule\Repeat ingInputRow.cs:643
Owentest.Page_Load(Object sender, EventArgs e) in
c:\Projects\Customisation\RedesignProtoTypeWeb\Owe ntest.aspx.cs:20
System.Web.Util.CalliHelper.EventArgFunctionCaller (IntPtr fp, Object
o, Object t, EventArgs e) +13
System.Web.Util.CalliEventHandlerDelegateProxy.Cal lback(Object
sender, EventArgs e) +45
System.Web.UI.Control.OnLoad(EventArgs e) +80
System.Web.UI.Control.LoadRecursive() +49
System.Web.UI.Page.ProcessRequestMain(Boolean
includeStagesBeforeAsyncPoint, Boolean
includeStagesAfterAsyncPoint) +3716
I don't get the exception if my databinding control is outside the
table
cell but, for a handful of other reasons, including that my
ItemTemplate
is being instantiated inside a TableRow, that won't work for me.
Any ideas gratefully received, as I'm completely lost.
Owen
--
Owen Blacker, London GB
Say no to ID cards: www.no2id.net
Get your mits off my bits: www.openrightsgroup.org
--
Those who would give up essential liberty to purchase a little
temporary safety, deserve neither liberty nor safety -- Benjamin
Franklin, 1759
