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]

Re: How to tell if an object inherits an interface

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]

Re: How to tell if an object inherits an interface

Thanks Darren!

"Darren" <Darren@nospam. nospamwrote in message
news:%23xRCcd6g IHA.5780@TK2MSF TNGP06.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]

Re: How to tell if an object inherits an interface

On Mar 11, 2:40 pm, Darren <Dar...@nospam. nospamwrote:

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
}
}