oops, typo error where i was using response.write to write out =
textbox2.id, i wrote out textbox1.id --
"Alessandro Zifiglio" <alessandrozifiglio@NO-SPAM-hotmail.com> wrote =
in message news:I5wSb.1645$HO2.1139@news.edisontel.com...
hi Jiho, ironically it so happens that I was experimenting with this =
today, also because I was having problems supplying ID's to child =
controls when having my control implement INamingContainer.=20

The answer is to implement this interface. When this interface is =
implemented a unique id is supplied for databound items, whereas a =
default name is supplied(*note: not id) to all other controls, this =
happens for all controls you do not explicitly provide an id value. =
However if you needed to later on retrieve the id of your control then =
you need to explicitly supply an id for these child controls in the form =
:=20
button1.id =3D "button1" and this interface will see to it that your =
control has a unique id when rendered, that is : =
"uniquecontrolName_button1".

Your question is when is the id available to you.. .. .from the code =
below you can see that this is available to you immediately after you =
supply an id to a child control, that is if in your CreateChildControls =
method you were adding the following controls and needed to pass the ID =
of your childcontrol to a validator control :=20

textbox1 =3D new textbox
validator1 =3D new RequiredFieldValidator
controls.add(textbox1)
controls.add(validator1)
textbox1.id =3D "textbox1"
validator1.ControlToValidate =3D textbox1.id '<<<=3D=3D=3D=3D=3D =
textbox1.id contains "textbox1"
validator1.ErrorMessage =3D "Text is required"


As you can see the id of textbox1 is passed to the validator within =
the same method. The unique name wrapper is supplied when the control is =
rendered, that is "uniqueControlName_textbox1".

When this is rendered to screen:=20

<input name=3D"uniqeControlName1:textbox1" type=3D"text" value=3D"" =
id=3D"uniqueControlName1_textbox1" />
<span id=3D"uniqueControlName1__ctl3" =
controltovalidate=3D"uniqueControlName1_textbox1" errormessage=3D"Text =
is required" .... ></span>

if you had never supplied an id for textbox1 then no id will be =
supplied but a name is supplied like :=20
<input name=3D"uniqueControlName1:_ctl3" type=3D"text" value=3D"" />

I have further noticed that a default unique id is supplied for non =
databound items like our validator control in the example has a unique =
id. I guess this is because validator controls have clientside =
validation behaviour, and an explict id is required for these, so if you =
didnt supply an id a unique id is supplied by default for these.

I dug a little futher by testing to see if find control could actually =
find the control from within our controls collection when we supply our =
id "textbox1" to it whereas to what is actually rendered to screen, that =
is : "uniqueControlName1_textbox1"

again from within the createChildControls method :=20

textbox1 =3D new textbox
validator1 =3D new RequiredFieldValidator
controls.add(textbox1)
controls.add(validator1)
textbox1.id =3D "textbox1"
validator1.ControlToValidate =3D textbox1.id '<<<=3D=3D=3D=3D=3D =
textbox1.id contains "textbox1"
validator1.ErrorMessage =3D "Text is required"

Dim textbox2 As TextBox
textbox2 =3D New TextBox()

textbox2 =3D CType(Me.FindControl(textbox1.ID), TextBox)
context.Response.Write("we have been able to retrieve =
textbox1 from our controls collection : " & textbox1.ID)


and this worked perfectly well with the FindControl method. the output =
to screen was :=20
we have been able to retrieve textbox1 from our controls collection : =
textbox1=20

Hope this got helpful to you as it were for me.

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