I just figured this out, and I'm so happy I had to share. This might be
obvious to some, and it might help others. Guess that's what this list is
for, eh?

I had a label control in a datalist EditItemTemplate that I couldn't figure
out how to manipulate. I built a button control and had an onClick event and
worked for days to figure it out with no luck.

The thing is, to work with controls embedded in a datalist you have to
assign the datalist an OnItemCommand event. So:

<asp:dataList
	id="testRequest"
	CellPadding="0"	CellSpacing="0"
	CssClass="projectDataHeaderOutline"
	DataKeyField="testNumber"
	OnEditCommand="DoItemEdit"
	OnUpdateCommand="DoItemUpdate"
	OnItemCommand="DoItemCommand"
	runat="server">

And then I wrote a sub to handle that event in order to manipulate the
embedded label control in the EditItemTemplate:

	Public Sub DoItemCommand (S as System.Object, E as
DataListCommandEventArgs)
	' Handles buttons within the testRequest datalist
		Dim dateStr as String
		Dim compareValue as Integer
		Dim newDate as DateTime

		Select E.CommandName
			Case "completedDate_Add"
				' Add a day to the date
				dateStr = CType (E.Item.FindControl
("completedDate"), Label).Text
				CType (E.Item.FindControl ("completedDate"),
Label).Text = DateTime.Parse (dateStr).AddDays (1).toShortDateString ()
			Case "completedDate_Add"
				' Subtract a day from the date but ensure
that it's not prior to the start date
				dateStr = CType (E.Item.FindControl
("completedDate"), Label).Text
				newDate = DateTime.Parse(dateStr).AddDays
(-1)
				compareValue = newDate.compareTo
(DateTime.Parse(labDate.Text))
				if (compareValue >= 0) Then
					dueDate.Text 
newDate.toShortDateString ()
				End If
		End Select
	End Sub

So that works! My code involves some other labels but you can see how it
happens.

Hope this helps someone-- spent all day yesterday pulling out hairs over the
issue.

Wells Oliver
Web Application Programmer
Leviton Voice & Data
xxx-xxx-xxxx
http://www.levitonvoicedata.com

I have a similar but slightly different problem which I have listed here
previously.  I have a panel control used to manage the layout of other
controls.  I have a datalist which has linkbuttons.  Via code, when I add
the datalist to the panel's controls collection, then display the datalist
and click one of its linkbuttons the linkbutton event does not fire.
However, if I do not use the panel then I can fire the linkbutton event.
Any ideas?

Thanks,
David X


-----Original Message-----
From: Oliver, Wells [mailto:WOliver@l...]
Sent: Wednesday, August 28, 2002 1:07 PM
To: ASP+
Subject: [aspx] FYI, for working with controls embedded in a datalist.


I just figured this out, and I'm so happy I had to share. This might be
obvious to some, and it might help others. Guess that's what this list is
for, eh?

I had a label control in a datalist EditItemTemplate that I couldn't figure
out how to manipulate. I built a button control and had an onClick event and
worked for days to figure it out with no luck.

The thing is, to work with controls embedded in a datalist you have to
assign the datalist an OnItemCommand event. So:

<asp:dataList
	id="testRequest"
	CellPadding="0"	CellSpacing="0"
	CssClass="projectDataHeaderOutline"
	DataKeyField="testNumber"
	OnEditCommand="DoItemEdit"
	OnUpdateCommand="DoItemUpdate"
	OnItemCommand="DoItemCommand"
	runat="server">

And then I wrote a sub to handle that event in order to manipulate the
embedded label control in the EditItemTemplate:

	Public Sub DoItemCommand (S as System.Object, E as
DataListCommandEventArgs)
	' Handles buttons within the testRequest datalist
		Dim dateStr as String
		Dim compareValue as Integer
		Dim newDate as DateTime

		Select E.CommandName
			Case "completedDate_Add"
				' Add a day to the date
				dateStr = CType (E.Item.FindControl
("completedDate"), Label).Text
				CType (E.Item.FindControl ("completedDate"),
Label).Text = DateTime.Parse (dateStr).AddDays (1).toShortDateString ()
			Case "completedDate_Add"
				' Subtract a day from the date but ensure
that it's not prior to the start date
				dateStr = CType (E.Item.FindControl
("completedDate"), Label).Text
				newDate = DateTime.Parse(dateStr).AddDays
(-1)
				compareValue = newDate.compareTo
(DateTime.Parse(labDate.Text))
				if (compareValue >= 0) Then
					dueDate.Text 
newDate.toShortDateString ()
				End If
		End Select
	End Sub

So that works! My code involves some other labels but you can see how it
happens.

Hope this helps someone-- spent all day yesterday pulling out hairs over the
issue.

Wells Oliver
Web Application Programmer
Leviton Voice & Data
xxx-xxx-xxxx
http://www.levitonvoicedata.com


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