Working with UserControls Programatically

Does anyone know of some in depth documentation regarding how to add user
controls programatically? I have a User Control, which has some basic html
controls, and depending on the number selected in an HtmlSelect control's
value, I need to put x number of forms (or usercontrol) on the page.

I've added the control once to the ASPX, but how do I add more than one when
needed to the page, then how do I rename the form names so that they are
unique to that particular instance of that control?

Any help and documentation would be appreciated!

Thanks!
AndreaHi Andrea,

The TemplateControl.LoadControl method is used to load usercontrols at
runtime. Then you need to insert the control into some other control
(parent) by calling the parent's Controls.Add method.

Not sure what exactly did you mean by "forms" but keep in mind that you can
only have one server-side form per page.

--
Victor Garcia Aprea
Microsoft MVP | ASP.NET
Looking for insights on ASP.NET? Read my blog:
http://obies.com/vga/blog.aspx

To contact me remove 'NOSPAM'. Please post all questions to the newsgroup
"Andrea Williams" <andreawil@.hotmail.IHATESpam.com> wrote in message
news:uFTR9AU4DHA.2380@.TK2MSFTNGP10.phx.gbl...
> Does anyone know of some in depth documentation regarding how to add user
> controls programatically? I have a User Control, which has some basic
html
> controls, and depending on the number selected in an HtmlSelect control's
> value, I need to put x number of forms (or usercontrol) on the page.
> I've added the control once to the ASPX, but how do I add more than one
when
> needed to the page, then how do I rename the form names so that they are
> unique to that particular instance of that control?
> Any help and documentation would be appreciated!
> Thanks!
> Andrea
One server-side form per aspx, right? yes... The first question I ask my
users is how many? They select a number from a drop down and then I want to
provide up to six groups of the same field. How many of those field
groupings depends on the number they select. My field grouping is in a User
Control that I made and the ASPX needs to include up to six of them on the
ASPX page inbetween the Form tags. Make sense?

So how do I do it... In the ASP world, I would loop from 1 to the number
selected and write out the extra fields to the page. How do I do that in
ASP.Net?

Andrea

"Victor Garcia Aprea [MVP]" <vga@.NOobiesSPAM.com> wrote in message
news:er4e%23GU4DHA.1672@.TK2MSFTNGP12.phx.gbl...
> Hi Andrea,
> The TemplateControl.LoadControl method is used to load usercontrols at
> runtime. Then you need to insert the control into some other control
> (parent) by calling the parent's Controls.Add method.
> Not sure what exactly did you mean by "forms" but keep in mind that you
can
> only have one server-side form per page.
> --
> Victor Garcia Aprea
> Microsoft MVP | ASP.NET
> Looking for insights on ASP.NET? Read my blog:
> http://obies.com/vga/blog.aspx
> To contact me remove 'NOSPAM'. Please post all questions to the newsgroup
> "Andrea Williams" <andreawil@.hotmail.IHATESpam.com> wrote in message
> news:uFTR9AU4DHA.2380@.TK2MSFTNGP10.phx.gbl...
> > Does anyone know of some in depth documentation regarding how to add
user
> > controls programatically? I have a User Control, which has some basic
> html
> > controls, and depending on the number selected in an HtmlSelect
control's
> > value, I need to put x number of forms (or usercontrol) on the page.
> > I've added the control once to the ASPX, but how do I add more than one
> when
> > needed to the page, then how do I rename the form names so that they are
> > unique to that particular instance of that control?
> > Any help and documentation would be appreciated!
> > Thanks!
> > Andrea
It makes sense. Use the LoadControl method that is available in your
Page-derived class to load as many UC as you want. The server-side form
should be defined in the aspx and not in the UC. After loading UC you need
to insert them into the Form Controls collection. In code this should look
like:
[C#]
Control form = FindControl ("YourFormID");
form.Controls.Add (LoadControl ("YourUserControlID"));

you can put the 2nd line in a loop that executes n times based on some user
selection, you could also vary the user control id if needed.

--
Victor Garcia Aprea
Microsoft MVP | ASP.NET
Looking for insights on ASP.NET? Read my blog:
http://obies.com/vga/blog.aspx
To contact me remove 'NOSPAM'. Please post all questions to the newsgroup

"Andrea Williams" <andreawil@.hotmail.IHATESpam.com> wrote in message
news:epMePNV4DHA.2332@.TK2MSFTNGP10.phx.gbl...
> One server-side form per aspx, right? yes... The first question I ask my
> users is how many? They select a number from a drop down and then I want
to
> provide up to six groups of the same field. How many of those field
> groupings depends on the number they select. My field grouping is in a
User
> Control that I made and the ASPX needs to include up to six of them on the
> ASPX page inbetween the Form tags. Make sense?
> So how do I do it... In the ASP world, I would loop from 1 to the number
> selected and write out the extra fields to the page. How do I do that in
> ASP.Net?
> Andrea
> "Victor Garcia Aprea [MVP]" <vga@.NOobiesSPAM.com> wrote in message
> news:er4e%23GU4DHA.1672@.TK2MSFTNGP12.phx.gbl...
> > Hi Andrea,
> > The TemplateControl.LoadControl method is used to load usercontrols at
> > runtime. Then you need to insert the control into some other control
> > (parent) by calling the parent's Controls.Add method.
> > Not sure what exactly did you mean by "forms" but keep in mind that you
> can
> > only have one server-side form per page.
> > --
> > Victor Garcia Aprea
> > Microsoft MVP | ASP.NET
> > Looking for insights on ASP.NET? Read my blog:
> > http://obies.com/vga/blog.aspx
> > To contact me remove 'NOSPAM'. Please post all questions to the
newsgroup
> > "Andrea Williams" <andreawil@.hotmail.IHATESpam.com> wrote in message
> > news:uFTR9AU4DHA.2380@.TK2MSFTNGP10.phx.gbl...
> > > Does anyone know of some in depth documentation regarding how to add
> user
> > > controls programatically? I have a User Control, which has some basic
> > html
> > > controls, and depending on the number selected in an HtmlSelect
> control's
> > > value, I need to put x number of forms (or usercontrol) on the page.
> > > > I've added the control once to the ASPX, but how do I add more than
one
> > when
> > > needed to the page, then how do I rename the form names so that they
are
> > > unique to that particular instance of that control?
> > > > Any help and documentation would be appreciated!
> > > > Thanks!
> > > Andrea
> >
Ok, that sounds simple enough... so when I'm getting the data after the
form is posting, is there any way for me to rename the field name_1, name_2,
etc so that I can easily find the data I'm looking for after the post. Some
of the fileds are going to be radio buttons and so each groupings name need
to be unique so that I do get the data mixed up and so that ht radio button
work properly. I hope this makes sense.

Is there a simple way to do that??

Thanks, BTW! This is helping!
Andrea

"Victor Garcia Aprea [MVP]" <vga@.NOobiesSPAM.com> wrote in message
news:eJKwpRW4DHA.1504@.TK2MSFTNGP12.phx.gbl...
> It makes sense. Use the LoadControl method that is available in your
> Page-derived class to load as many UC as you want. The server-side form
> should be defined in the aspx and not in the UC. After loading UC you need
> to insert them into the Form Controls collection. In code this should look
> like:
> [C#]
> Control form = FindControl ("YourFormID");
> form.Controls.Add (LoadControl ("YourUserControlID"));
> you can put the 2nd line in a loop that executes n times based on some
user
> selection, you could also vary the user control id if needed.
> --
> Victor Garcia Aprea
> Microsoft MVP | ASP.NET
> Looking for insights on ASP.NET? Read my blog:
> http://obies.com/vga/blog.aspx
> To contact me remove 'NOSPAM'. Please post all questions to the newsgroup
> "Andrea Williams" <andreawil@.hotmail.IHATESpam.com> wrote in message
> news:epMePNV4DHA.2332@.TK2MSFTNGP10.phx.gbl...
> > One server-side form per aspx, right? yes... The first question I ask
my
> > users is how many? They select a number from a drop down and then I
want
> to
> > provide up to six groups of the same field. How many of those field
> > groupings depends on the number they select. My field grouping is in a
> User
> > Control that I made and the ASPX needs to include up to six of them on
the
> > ASPX page inbetween the Form tags. Make sense?
> > So how do I do it... In the ASP world, I would loop from 1 to the
number
> > selected and write out the extra fields to the page. How do I do that
in
> > ASP.Net?
> > Andrea
> > "Victor Garcia Aprea [MVP]" <vga@.NOobiesSPAM.com> wrote in message
> > news:er4e%23GU4DHA.1672@.TK2MSFTNGP12.phx.gbl...
> > > Hi Andrea,
> > > > The TemplateControl.LoadControl method is used to load usercontrols at
> > > runtime. Then you need to insert the control into some other control
> > > (parent) by calling the parent's Controls.Add method.
> > > > Not sure what exactly did you mean by "forms" but keep in mind that
you
> > can
> > > only have one server-side form per page.
> > > > --
> > > Victor Garcia Aprea
> > > Microsoft MVP | ASP.NET
> > > Looking for insights on ASP.NET? Read my blog:
> > > http://obies.com/vga/blog.aspx
> > > > To contact me remove 'NOSPAM'. Please post all questions to the
> newsgroup
> > > "Andrea Williams" <andreawil@.hotmail.IHATESpam.com> wrote in message
> > > news:uFTR9AU4DHA.2380@.TK2MSFTNGP10.phx.gbl...
> > > > Does anyone know of some in depth documentation regarding how to add
> > user
> > > > controls programatically? I have a User Control, which has some
basic
> > > html
> > > > controls, and depending on the number selected in an HtmlSelect
> > control's
> > > > value, I need to put x number of forms (or usercontrol) on the page.
> > > > > > I've added the control once to the ASPX, but how do I add more than
> one
> > > when
> > > > needed to the page, then how do I rename the form names so that they
> are
> > > > unique to that particular instance of that control?
> > > > > > Any help and documentation would be appreciated!
> > > > > > Thanks!
> > > > Andrea
> > > > > >