System.Web.UI.Page?

[Arpan]

Consider the following code:

<form runat="server">
<aspataList ID="dlUsers" OnCancelCommand="CancelList"
OnDeleteCommand="DeleteList" OnEditCommand="EditList"
OnItemCommand="ItemList" OnUpdateCommand="UpdateList"
RepeatDirection="horizontal" RepeatLayout="table" runat="server">
<ItemTemplate>
<asp:LinkButton ID="lnkButton" CommandName="Edit" runat="server"><%#
Container.DataItem("FirstName") %></asp:LinkButton>
&nbsp;&nbsp;&nbsp;&nbsp;
</ItemTemplate>
<EditItemTemplate>
<asp:LinkButton ID="lnkCancel" CommandName="Cancel" Text="Cancel"
runat="server"/>
<asp:LinkButton ID="lnkUpdate" CommandName="Update" Text="Update"
runat="server"/>
<asp:LinkButton ID="lnkDelete" CommandName="Delete" Text="Delete"
runat="server"/>
</EditItemTemplate>
</aspataList>
</form>

The event handlers for the different events are not shown here. As such
the above code works fine but if I add a TextBox control immediately
after the opening <form> tag & keep the rest of the code as it is

<form runat="server">
<asp:TextBox ID="txtFName" Text=<%# Container.DataItem("FirstName") %>
runat="server"/>
<%-- rest of the code comes here as shown above --%>

then the VWD 2005 IDE generates the following error:

'DataItem' is not a member of 'System.Web.UI.Page'

pointing to the line

<asp:LinkButton ID="lnkButton" CommandName="Edit" runat="server"><%#
Container.DataItem("FirstName") %></asp:LinkButton>

but when I run the page in IE6, the same error gets generated but this
time pointing to the line

<asp:TextBox ID="txtValue" Text=<%# Container.DataItem("FirstName") %>
runat="server"/>

First of all, what's causing the above error? Secondly, why is the VWD
IDE & the .NET compiler pointing to 2 different code lines though both
of them are generating the same error?

Thanks,

Arpan

 

[Kumar Reddi]

The error is because you are placing the textbox control outside a
non-databound control.. i.e. a datagrid or datalist or repeater.. If
you want to use a value from the datalist data source.. you need to
keep it inside the datalist templates..

if you want to assign a value to textbox.. then it should be inside an
ItemTemplate or EditItemTemplate

 

[Arpan]

First of all, many many thanks for your explanations.

The error is because you are placing the textbox control outside a
non-databound control.. i.e. a datagrid or datalist or repeater.. If
you want to use a value from the datalist data source.. you need to
keep it inside the datalist templates..

You mean to say that to assign a value to any non-boundable web server
control (like TextBox, LinkButton, Button, Hyperlink etc..) from a data
binding control (i.e. DataList or DataGrid or Repeater) data source,
the non-boundable web server control SHOULD be placed within any of the
templates of the data binding control (i.e. DataList or DataGrid or
Repeater)......am I right? Please correct me if I have got it wrong.

Thanks once again,

Regards,

Arpan

 

[Kumar Reddi]

Yes, You are right!

First of all, many many thanks for your explanations.


You mean to say that to assign a value to any non-boundable web server
control (like TextBox, LinkButton, Button, Hyperlink etc..) from a data
binding control (i.e. DataList or DataGrid or Repeater) data source,
the non-boundable web server control SHOULD be placed within any of the
templates of the data binding control (i.e. DataList or DataGrid or
Repeater)......am I right? Please correct me if I have got it wrong.

Thanks once again,

Regards,

Arpan