PlaceHolder Question

[Oren]

hi,
How can I retrieve the Control (wucState.ascx) from the Placeholder at the
even: btn_Click:
//declaration at page
protected wucState WucState1; -- my control
....
private void Page_Load(objec t sender, System.EventArg s e)
{
....
WucState1 = Page.LoadContro l("wucState.asc x") as wucState;
plhState.Contro ls.Add(WucState 1);
....
}
....
private void btn_Click(objec t sender, System.EventArg s e)
{
WucState1 = (wucState)plhSt ate.Controls[0]; // ERROR !!!!!! CANNOT FIND
THE CONTROL
....
}

any idea ? please with code sample.

thanx,
Oren

[Karl Seguin]

Re: PlaceHolder Question

It isn't clear from your code whether or not you are adding the control to
your placeholder during postback. Ie, if you have the Page.LoadContro l and
plhState.Contro ls.Add lines below in a if (!Page.IsPostBa ck) then things
won't work.

Also, since you've scoped WucState1 as a field (seems like it should be
private, not public, but that doesn't mater), why not just use WucState1 in
yoru click?

public class Index: Page
{
private wucState _wucState1;
private void Page_Load(objec t sender, System.EventArg s e)
{
_wucState1 = (wucState)Page. LoadControl("wu cState.ascx");
plhState.Contro ls.Add(_wucStat e1);
if (!Page.IsPostBa ck)
{
//do stuff
}
}
private void btn_Click(objec t sender, System.EventArg s e)
{
_wucState1.What ever //shouldn't be null, because it was recreated
in page_load on postback
}
}

Karl

--
MY ASP.Net tutorials

http://www.openmymind.net/

http://openmymind.net/redirector.aspx?documentId=51 - Learn about AJAX!



"Oren" <Oren@discussio ns.microsoft.co m> wrote in message
news:7086B9B6-6FAE-4673-B8D7-42144ADEAC72@mi crosoft.com...[color=blue]
> hi,
> How can I retrieve the Control (wucState.ascx) from the Placeholder at the
> even: btn_Click:
> //declaration at page
> protected wucState WucState1; -- my control
> ...
> private void Page_Load(objec t sender, System.EventArg s e)
> {
> ...
> WucState1 = Page.LoadContro l("wucState.asc x") as wucState;
> plhState.Contro ls.Add(WucState 1);
> ...
> }
> ...
> private void btn_Click(objec t sender, System.EventArg s e)
> {
> WucState1 = (wucState)plhSt ate.Controls[0]; // ERROR !!!!!! CANNOT FIND
> THE CONTROL
> ...
> }
>
> any idea ? please with code sample.
>
> thanx,
> Oren
>[/color]

[Oren]

Re: PlaceHolder Question

Karl,
the "Page.Controls. Add" is inside "if (!Page.IsPostBa ck)". On the Click
event I need to retreive some data that was changed in the control.

public class Index: Page
{
private wucState _wucState1;
private System.Web.UI.W ebControls.Plac eHolder plhOrder;
private void Page_Load(objec t sender, System.EventArg s e)
{
if (!Page.IsPostBa ck)
{
_wucState1 = (wucState)Page. LoadControl("wu cState.ascx");
plhState.Contro ls.Add(_wucStat e1);
}
}
private void btn_Click(objec t sender, System.EventArg s e)
{
_wucState1 = (wucState)plhSt ate.Controls[0]; // ERROR
}
}


"Karl Seguin" wrote:
[color=blue]
> It isn't clear from your code whether or not you are adding the control to
> your placeholder during postback. Ie, if you have the Page.LoadContro l and
> plhState.Contro ls.Add lines below in a if (!Page.IsPostBa ck) then things
> won't work.
>
> Also, since you've scoped WucState1 as a field (seems like it should be
> private, not public, but that doesn't mater), why not just use WucState1 in
> yoru click?
>
> public class Index: Page
> {
> private wucState _wucState1;
> private void Page_Load(objec t sender, System.EventArg s e)
> {
> _wucState1 = (wucState)Page. LoadControl("wu cState.ascx");
> plhState.Contro ls.Add(_wucStat e1);
> if (!Page.IsPostBa ck)
> {
> //do stuff
> }
> }
> private void btn_Click(objec t sender, System.EventArg s e)
> {
> _wucState1.What ever //shouldn't be null, because it was recreated
> in page_load on postback
> }
> }
>
> Karl
>
> --
> MY ASP.Net tutorials
> http://www.openmymind.net/
> http://openmymind.net/redirector.aspx?documentId=51 - Learn about AJAX!
>
>
>
> "Oren" <Oren@discussio ns.microsoft.co m> wrote in message
> news:7086B9B6-6FAE-4673-B8D7-42144ADEAC72@mi crosoft.com...[color=green]
> > hi,
> > How can I retrieve the Control (wucState.ascx) from the Placeholder at the
> > even: btn_Click:
> > //declaration at page
> > protected wucState WucState1; -- my control
> > ...
> > private void Page_Load(objec t sender, System.EventArg s e)
> > {
> > ...
> > WucState1 = Page.LoadContro l("wucState.asc x") as wucState;
> > plhState.Contro ls.Add(WucState 1);
> > ...
> > }
> > ...
> > private void btn_Click(objec t sender, System.EventArg s e)
> > {
> > WucState1 = (wucState)plhSt ate.Controls[0]; // ERROR !!!!!! CANNOT FIND
> > THE CONTROL
> > ...
> > }
> >
> > any idea ? please with code sample.
> >
> > thanx,
> > Oren
> >[/color]
>
>
>[/color]

[Karl Seguin]

Re: PlaceHolder Question

As i said (and my example showed), it must be OUTSIDE the
!Page.IsPostbac k....you can't find the control because on postback, it was
never recreated and added to the placeholder..

Karl
--
MY ASP.Net tutorials

http://www.openmymind.net/

http://openmymind.net/redirector.aspx?documentId=51 - Learn about AJAX!



"Oren" <Oren@discussio ns.microsoft.co m> wrote in message
news:7CD53AAB-7BAC-463F-B450-9D816D3FD753@mi crosoft.com...[color=blue]
> Karl,
> the "Page.Controls. Add" is inside "if (!Page.IsPostBa ck)". On the Click
> event I need to retreive some data that was changed in the control.
>
> public class Index: Page
> {
> private wucState _wucState1;
> private System.Web.UI.W ebControls.Plac eHolder plhOrder;
> private void Page_Load(objec t sender, System.EventArg s e)
> {
> if (!Page.IsPostBa ck)
> {
> _wucState1 = (wucState)Page. LoadControl("wu cState.ascx");
> plhState.Contro ls.Add(_wucStat e1);
> }
> }
> private void btn_Click(objec t sender, System.EventArg s e)
> {
> _wucState1 = (wucState)plhSt ate.Controls[0]; // ERROR
> }
> }
>
>
> "Karl Seguin" wrote:
>[color=green]
>> It isn't clear from your code whether or not you are adding the control
>> to
>> your placeholder during postback. Ie, if you have the Page.LoadContro l
>> and
>> plhState.Contro ls.Add lines below in a if (!Page.IsPostBa ck) then
>> things
>> won't work.
>>
>> Also, since you've scoped WucState1 as a field (seems like it should be
>> private, not public, but that doesn't mater), why not just use WucState1
>> in
>> yoru click?
>>
>> public class Index: Page
>> {
>> private wucState _wucState1;
>> private void Page_Load(objec t sender, System.EventArg s e)
>> {
>> _wucState1 = (wucState)Page. LoadControl("wu cState.ascx");
>> plhState.Contro ls.Add(_wucStat e1);
>> if (!Page.IsPostBa ck)
>> {
>> //do stuff
>> }
>> }
>> private void btn_Click(objec t sender, System.EventArg s e)
>> {
>> _wucState1.What ever //shouldn't be null, because it was
>> recreated
>> in page_load on postback
>> }
>> }
>>
>> Karl
>>
>> --
>> MY ASP.Net tutorials
>> http://www.openmymind.net/
>> http://openmymind.net/redirector.aspx?documentId=51 - Learn about AJAX!
>>
>>
>>
>> "Oren" <Oren@discussio ns.microsoft.co m> wrote in message
>> news:7086B9B6-6FAE-4673-B8D7-42144ADEAC72@mi crosoft.com...[color=darkred]
>> > hi,
>> > How can I retrieve the Control (wucState.ascx) from the Placeholder at
>> > the
>> > even: btn_Click:
>> > //declaration at page
>> > protected wucState WucState1; -- my control
>> > ...
>> > private void Page_Load(objec t sender, System.EventArg s e)
>> > {
>> > ...
>> > WucState1 = Page.LoadContro l("wucState.asc x") as wucState;
>> > plhState.Contro ls.Add(WucState 1);
>> > ...
>> > }
>> > ...
>> > private void btn_Click(objec t sender, System.EventArg s e)
>> > {
>> > WucState1 = (wucState)plhSt ate.Controls[0]; // ERROR !!!!!! CANNOT
>> > FIND
>> > THE CONTROL
>> > ...
>> > }
>> >
>> > any idea ? please with code sample.
>> >
>> > thanx,
>> > Oren
>> >[/color]
>>
>>
>>[/color][/color]