Desing problem

[Alex Bibiano]

Question about .net 2.0 and C#:

In the open event of my WinForms I do a loop trough all the controls
collection.
I have inherited new controls from the base controls (button, label, .), all
with a new property (security).
Now, I have modified the loop in the open event to check if the control has
the property set to true.

I have used this code:

private void loopControls(Control.ControlCollection ctrls)

{

foreach(Control ctr in ctrls)

{

loopControls (ctr.Controls);

if (ctr.GetType() == typeof(customButton))

{

if (((customButton)ctr).Security == true)

{

// Make something

}

}

}

}

The problem is that now I have 4 or more customControls and I have to check
in the if the type for all the diferent controls.

¿Is there a way to do it more elegant?

I have tried to inherite all my controls from an interface and chek if the
control implment the interface, but dosen't work (a interface can't have a
property). Note: All the custom control unherit from base controls.

A lot of thanks.

Alex B.

[Frans Bouma [C# MVP]]

Alex Bibiano wrote:

Question about .net 2.0 and C#:
In the open event of my WinForms I do a loop trough all the controls
collection.

I have inherited new controls from the base controls (button, label,
.), all with a new property (security).
Now, I have modified the loop in the open event to check if the
control has the property set to true.

I have used this code:

private void loopControls(Control.ControlCollection ctrls)
{
foreach(Control ctr in ctrls)
{
loopControls (ctr.Controls);
if (ctr.GetType() == typeof(customButton))
{
if (((customButton)ctr).Security == true)
{
// Make something
}
}
}
}

The problem is that now I have 4 or more customControls and I have to
check in the if the type for all the diferent controls.

¿Is there a way to do it more elegant?

I have tried to inherite all my controls from an interface and chek
if the control implment the interface, but dosen't work (a interface
can't have a property). Note: All the custom control unherit from
base controls.

Of course interfaces can have property definitions!
public interface IFoo
{
int Count { get; }
}

public class Foo: IFoo
{
//...

public int Count
{
get { return _count; }
}
}

You should define an interface: (this is an example, to show you how
it's done)

public interface ISecurityProvider
{
bool Security { get;}
}

then in your control code:
public class MyButton : Button, ISecurityProvider
{
//..

public bool Security
{
get { return _security;}
}
}

and in your form:

private void loopControls(Control.ControlCollection ctrls)
{
foreach(Control ctr in ctrls)
{
loopControls (ctr.Controls);
ISecurityProvider controlSecurity =
ctr as ISecurityProvider;
if((controlSecurity!=null) && controlSecurity.Security)
{
// make something
}
}
}

FB
--
------------------------------------------------------------------------
Lead developer of LLBLGen Pro, the productive O/R mapper for .NET
LLBLGen Pro website: http://www.llblgen.com
My .NET blog: http://weblogs.asp.net/fbouma
Microsoft MVP (C#)
------------------------------------------------------------------------

[Alex Bibiano]

A lot of thanks. It was very helpfull
"Frans Bouma [C# MVP]" <pe******************@xs4all.nl> escribió en el
mensaje news:xn***************@news.microsoft.com...

Alex Bibiano wrote:

Question about .net 2.0 and C#:
In the open event of my WinForms I do a loop trough all the controls
collection.

I have inherited new controls from the base controls (button, label,
.), all with a new property (security).
Now, I have modified the loop in the open event to check if the
control has the property set to true.

I have used this code:

private void loopControls(Control.ControlCollection ctrls)
{
foreach(Control ctr in ctrls)
{
loopControls (ctr.Controls);
if (ctr.GetType() == typeof(customButton))
{
if (((customButton)ctr).Security == true)
{
// Make something
}
}
}
}

The problem is that now I have 4 or more customControls and I have to
check in the if the type for all the diferent controls.

¿Is there a way to do it more elegant?

I have tried to inherite all my controls from an interface and chek
if the control implment the interface, but dosen't work (a interface
can't have a property). Note: All the custom control unherit from
base controls.

Of course interfaces can have property definitions!
public interface IFoo
{
int Count { get; }
}

public class Foo: IFoo
{
//...

public int Count
{
get { return _count; }
}
}

You should define an interface: (this is an example, to show you how
it's done)

public interface ISecurityProvider
{
bool Security { get;}
}

then in your control code:
public class MyButton : Button, ISecurityProvider
{
//..

public bool Security
{
get { return _security;}
}
}

and in your form:

private void loopControls(Control.ControlCollection ctrls)
{
foreach(Control ctr in ctrls)
{
loopControls (ctr.Controls);
ISecurityProvider controlSecurity =
ctr as ISecurityProvider;
if((controlSecurity!=null) && controlSecurity.Security)
{
// make something
}
}
}

FB
--
------------------------------------------------------------------------
Lead developer of LLBLGen Pro, the productive O/R mapper for .NET
LLBLGen Pro website: http://www.llblgen.com
My .NET blog: http://weblogs.asp.net/fbouma
Microsoft MVP (C#)
------------------------------------------------------------------------