Check for Inheritance

[Jason]

I want to use reflection to check if a given class inherits from
UserControl. The solution would need to consider the possibility that the
class does not inherit directly from UserControl but goes through several
layers. Besides creating an instance of the control and doing something like
"myControl Is UserControl", can I use reflection to determine this?

Thanks.

- Jason

 

[Jon Skeet [C# MVP]]

I want to use reflection to check if a given class inherits from
UserControl. The solution would need to consider the possibility that the
class does not inherit directly from UserControl but goes through several
layers. Besides creating an instance of the control and doing something like
"myControl Is UserControl", can I use reflection to determine this?

Type.IsAssignableFrom is probably the easiest way.

if (typeof(UserControl).IsAssignableFrom (testType))

 

[Guest]

You can use:
myControl.GetType().IsSubclassOf(typeof(UserControl));

Regards, Jakob.

 

[Richard Blewett [DevelopMentor]]

bool DoesItDeriveFromUserControl(string typename)
{
bool ret = false;
for( Type t = Type.GetType(typename); t.BaseClass; t != typeof(object); t = t.BaseType)
{
if( t == typeof(UserControl) )
{
ret = true;
break;
}
}
return ret;
}

Regards

Richard Blewett - DevelopMentor
http://staff.develop.com/richardb/weblog

nntp://news.microsoft.com/microsoft.public.dotnet.framework/<[email protected]>

I want to use reflection to check if a given class inherits from
UserControl. The solution would need to consider the possibility that the
class does not inherit directly from UserControl but goes through several
layers. Besides creating an instance of the control and doing something like
"myControl Is UserControl", can I use reflection to determine this?

Thanks.

- Jason



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[microsoft.public.dotnet.framework]

 

[Richard Blewett [DevelopMentor]]

I vote mine as the worst solution ;-)

Regards

Richard Blewett - DevelopMentor
http://staff.develop.com/richardb/weblog

nntp://news.microsoft.com/microsoft.public.dotnet.framework/<#[email protected]>

bool DoesItDeriveFromUserControl(string typename)
{
bool ret = false;
for( Type t = Type.GetType(typename); t.BaseClass; t != typeof(object); t = t.BaseType)
{
if( t == typeof(UserControl) )
{
ret = true;
break;
}
}
return ret;
}

Regards

Richard Blewett - DevelopMentor
http://staff.develop.com/richardb/weblog

nntp://news.microsoft.com/microsoft.public.dotnet.framework/<[email protected]>

I want to use reflection to check if a given class inherits from
UserControl. The solution would need to consider the possibility that the
class does not inherit directly from UserControl but goes through several
layers. Besides creating an instance of the control and doing something like
"myControl Is UserControl", can I use reflection to determine this?

Thanks.

- Jason



---
Incoming mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.771 / Virus Database: 518 - Release Date: 28/09/2004



[microsoft.public.dotnet.framework]

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Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.771 / Virus Database: 518 - Release Date: 28/09/2004



[microsoft.public.dotnet.framework]