About multi-Inherits

[Jet Leung]

Hi all,
I had made a UserControl, and I want to inherits panel,label,but ton and
linklabel from my class. But when I typed the code like
====
public class A :
System.Windows. Forms.UserContr ol,System.Windo ws.Forms.Panel,
System.Windows. Forms.Button,Sy stem.Windows.Fo rms.Label,Syste m.
Windows.Forms.L inkLabel
.....

======

There is an error to me. It said thoes were not interface,and I couldn't
inherits them.

How can I solve this problem?

[Razzie]

Hello Jet,

C# does not support multiple inheritance of classes, only interfaces. Since
they are not interfaces, you get this error.
You can't solve this problem - unless you inherit interfaces.

Good luck,

Razzie

"Jet Leung" <xi**@tom.com > wrote in message
news:%2******** ********@TK2MSF TNGP09.phx.gbl. ..

Hi all,
I had made a UserControl, and I want to inherits panel,label,but ton and
linklabel from my class. But when I typed the code like
====
public class A :
System.Windows. Forms.UserContr ol,System.Windo ws.Forms.Panel,
System.Windows. Forms.Button,Sy stem.Windows.Fo rms.Label,Syste m.
Windows.Forms.L inkLabel
....

======

There is an error to me. It said thoes were not interface,and I couldn't
inherits them.

How can I solve this problem?

[Morten Wennevik]

Hi Jet,

You can only inherit from one single class in C#.
You can, however, inherit from multiple interfaces and the syntax to do so is how you wrote your class

public class A : BaseClass, Interface1, Interface2, Interface3 ...
{
}

So the compiler expects Panel, Button, Label, linkLabel to be interfaces, which they are not.

You need to rethink your strategy. Why do you want to inherit from all the classes.

--
Happy coding!
Morten Wennevik [C# MVP]

[Mattias Sjögren]

I had made a UserControl, and I want to inherits panel,label,but ton and
linklabel from my class.

Are you sure you don't want your control to *contain* these other
controls? Even if C# and the CLR supported multiple inheritance (which
they don't), what kind of behavior would you expect this control to
have?

Mattias

--
Mattias Sjögren [MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com
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