How to tell if an object inherits an interface

[Ron]

I have a situation where I need to test if a Control implements from a
specific Interface to avoid an invalid cast exception:

foreach (Control ctrl in this.Controls)
{
// Need to test to see if ctrl inherits interface ICustomControl here
ICustomControl control = (ICustomControl)ctrl;
}

Thanks!
Ron

[Darren]

if ( control is ICustomControl )
{
.....
}
Ron wrote:

I have a situation where I need to test if a Control implements from a
specific Interface to avoid an invalid cast exception:

foreach (Control ctrl in this.Controls)
{
// Need to test to see if ctrl inherits interface ICustomControl here
ICustomControl control = (ICustomControl)ctrl;
}

Thanks!
Ron

[Ron]

Thanks Darren!

"Darren" <Da****@nospam.nospamwrote in message
news:%2****************@TK2MSFTNGP06.phx.gbl...

if ( control is ICustomControl )
{
....
}
Ron wrote:

>I have a situation where I need to test if a Control implements from a
specific Interface to avoid an invalid cast exception:

foreach (Control ctrl in this.Controls)
{
// Need to test to see if ctrl inherits interface ICustomControl here
ICustomControl control = (ICustomControl)ctrl;
}

Thanks!
Ron

[Andy]

On Mar 11, 2:40 pm, Darren <[e-mail]:

if ( control is ICustomControl )
{
....

}
Ron wrote:

I have a situation where I need to test if a Control implements from a
specific Interface to avoid an invalid cast exception:

foreach (Control ctrl in this.Controls)
{
// Need to test to see if ctrl inherits interface ICustomControl here
ICustomControl control = (ICustomControl)ctrl;
}

Thanks!
Ron

Alternately, he can do this:
foreach (Control ctrl in this.Controls)
{
// Need to test to see if ctrl inherits interface ICustomControl here
ICustomControl control = ctrl as ICustomControl;
if ( control != null ) {
// do something
}
}