I have a project in ASP.NET using C#. I have a large number of Button Controls and a large number of ImageButton Controls. It would be convienent if I could refer to a specific control by it's index number, in the same way in which I used a Command Array in VB6. What is the method of assigning and then obtaining a specific unique identified for a control ? Sample code or reference articles would be appreciated.
Thanks,
Jim

Use the "sender" argument of your event handler to identify which control
fired the event.


"James McGivney" <(E-Mail Removed)> wrote in message
news:C015B154-40E1-436C-AF52-(E-Mail Removed)...
> I have a project in ASP.NET using C#. I have a large number of Button
Controls and a large number of ImageButton Controls. It would be convienent
if I could refer to a specific control by it's index number, in the same way
in which I used a Command Array in VB6. What is the method of assigning and
then obtaining a specific unique identified for a control ? Sample code or
reference articles would be appreciated.
> Thanks,
> Jim

Cast the sender argument to the control type and then access its properties.

There is a control array collection equivalent to the VB6 model, but AFAIK
it only works on windows forms.

--
____________________
Klaus H. Probst, MVP
http://www.vbbox.com/

"James McGivney" <(E-Mail Removed)> wrote in message
news:C015B154-40E1-436C-AF52-(E-Mail Removed)...
> I have a project in ASP.NET using C#. I have a large number of Button
Controls and a large number of ImageButton Controls. It would be convienent
if I could refer to a specific control by it's index number, in the same way
in which I used a Command Array in VB6. What is the method of assigning and
then obtaining a specific unique identified for a control ? Sample code or
reference articles would be appreciated.
> Thanks,
> Jim

Can you elaborate on this control array collection available in a windows
forms project?


"Klaus H. Probst" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Cast the sender argument to the control type and then access its
properties.
>
> There is a control array collection equivalent to the VB6 model, but AFAIK
> it only works on windows forms.
>
> --
> ____________________
> Klaus H. Probst, MVP
> http://www.vbbox.com/
>
> "James McGivney" <(E-Mail Removed)> wrote in message
> news:C015B154-40E1-436C-AF52-(E-Mail Removed)...
> > I have a project in ASP.NET using C#. I have a large number of Button
> Controls and a large number of ImageButton Controls. It would be
convienent
> if I could refer to a specific control by it's index number, in the same
way
> in which I used a Command Array in VB6. What is the method of assigning
and
> then obtaining a specific unique identified for a control ? Sample code
or
> reference articles would be appreciated.
> > Thanks,
> > Jim
>
>

Thanks for your help. I'm almost there
I can retreive the name of the pressed button by
string WhichButton = ((System.Web.UI.WebControls.Button)sender).ID.ToString()
Now, how do I use this information, say to change the BackColor
WhichButton.BackColor = Color.Green; generates an error
What is the syntax to change the BackColor having the name of the control
Thanks
Jim

Don't declare WhichButton as a string, declare it as a button. Then set an
object reference to Sender cast as the button type.

Don't have the C# for you, but here it is in VB.NET

Dim WhichButton as System.Web.UI.WebControls.Button
WhichButton = CType(sender, System.Web.UI.WebControls.Button)
WhichButton.BackColor = Color.Green

Or even more simply (no variable reference, just working directly with
sender):

CType(sender, System.Web.UI.WebControls.Button).BackColor = Color.Green



"James McGivney" <(E-Mail Removed)> wrote in message
news:1700AC59-2A1F-4C7D-893D-(E-Mail Removed)...
> Thanks for your help. I'm almost there.
> I can retreive the name of the pressed button by:
> string WhichButton =
((System.Web.UI.WebControls.Button)sender).ID.ToString();
> Now, how do I use this information, say to change the BackColor ?
> WhichButton.BackColor = Color.Green; generates an error.
> What is the syntax to change the BackColor having the name of the control.
> Thanks,
> Jim

I've never used them, but for VB.NET GUI projects in (I believe)
compatibility mode, there are a bunch of framework classes that wrap the
control collection functionality. I don't know how close they are to the VB6
ones.


--
____________________
Klaus H. Probst, MVP
http://www.vbbox.com/

"Scott M." <s-(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Can you elaborate on this control array collection available in a windows
> forms project?
>
>
> "Klaus H. Probst" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
> > Cast the sender argument to the control type and then access its
> properties.
> >
> > There is a control array collection equivalent to the VB6 model, but
AFAIK
> > it only works on windows forms.
> >
> > --
> > ____________________
> > Klaus H. Probst, MVP
> > http://www.vbbox.com/
> >
> > "James McGivney" <(E-Mail Removed)> wrote in message
> > news:C015B154-40E1-436C-AF52-(E-Mail Removed)...
> > > I have a project in ASP.NET using C#. I have a large number of Button
> > Controls and a large number of ImageButton Controls. It would be
> convienent
> > if I could refer to a specific control by it's index number, in the same
> way
> > in which I used a Command Array in VB6. What is the method of assigning
> and
> > then obtaining a specific unique identified for a control ? Sample code
> or
> > reference articles would be appreciated.
> > > Thanks,
> > > Jim
> >
> >
>
>

I ask because in .NET you can't create a control array in the VB 6.0 sense
(several controls with the same name identified by an index). In .NET, you
can create a collection of controls, but this is not the same thing.

You can get the same benefits of a control array in .NET by assigning one
event handler to handle all the various controls with the event handlers
"Handles" clause and then you can use a Select statement that looks at the
Sender argument to see which one was responsible for firing the event.


"Klaus H. Probst" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> I've never used them, but for VB.NET GUI projects in (I believe)
> compatibility mode, there are a bunch of framework classes that wrap the
> control collection functionality. I don't know how close they are to the
VB6
> ones.
>
>
> --
> ____________________
> Klaus H. Probst, MVP
> http://www.vbbox.com/
>
> "Scott M." <s-(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
> > Can you elaborate on this control array collection available in a
windows
> > forms project?
> >
> >
> > "Klaus H. Probst" <(E-Mail Removed)> wrote in message
> > news:(E-Mail Removed)...
> > > Cast the sender argument to the control type and then access its
> > properties.
> > >
> > > There is a control array collection equivalent to the VB6 model, but
> AFAIK
> > > it only works on windows forms.
> > >
> > > --
> > > ____________________
> > > Klaus H. Probst, MVP
> > > http://www.vbbox.com/
> > >
> > > "James McGivney" <(E-Mail Removed)> wrote in message
> > > news:C015B154-40E1-436C-AF52-(E-Mail Removed)...
> > > > I have a project in ASP.NET using C#. I have a large number of
Button
> > > Controls and a large number of ImageButton Controls. It would be
> > convienent
> > > if I could refer to a specific control by it's index number, in the
same
> > way
> > > in which I used a Command Array in VB6. What is the method of
assigning
> > and
> > > then obtaining a specific unique identified for a control ? Sample
code
> > or
> > > reference articles would be appreciated.
> > > > Thanks,
> > > > Jim
> > >
> > >
> >
> >
>
>

Thanks for your help. I'll try it in C
Jim

I'd like to ask one more related question. From this thread I have learned how to detect which button was clicked and how to use this information to change the properties of the button. But, suppose I find out the 5th button was pressed, now how to I add an image to my 5th ImageButton. Assume that the clicked button is Button5 and the imageButton I want to change is ImageButton5. How do I get the info for imageButton5 ? VB6's index property would make this simple. How do I accomplish this in C#.net
Thanks for your help
Jim