Inheritance Problem

[Binod Nair]

Hi All,

Can somebody tell me what I am doing wrong.

I have a Base Abstract Class

Public MustInherit Class BaseRequestHand ler : Inherits System.Web.UI.P age

Protected Overridable Sub Page_Load(ByVal sender As System.Object, ByVal e
As System.EventArg s) Handles MyBase.Load

SomeMethod()

End Sub

Public MustOverride Sub SomeMethod()

End Class

I have a Web Page which Inherits this base class

Public Class ManageCatalog : Inherits BaseRequestHand ler

Public Overrides Sub SomeMethod()

'Code Block

end sub

end class

When I try to run it , I get the error

Compiler Error Message: BC30610: Class 'ManageCatalog_ aspx' must either be
declared 'MustInherit' or override the following inherited 'MustOverride'
member(s): Public Overridable MustOverride Sub SomeMethod().

Plss Help.. I am doing something really stupid..

[Binod Nair]

John thanks a lot

The problem was here

I HAD IT AS
<%@ Page Language="vb" AutoEventWireup ="false" Codebehind="Web Form1.aspx.vb"
Inherits="TestV BWebApp.BaseReq uestHandler "%>

AND NOT LIKE WHAT John said
<%@ Page Language="vb" AutoEventWireup ="false" Codebehind="Web Form1.aspx.vb"
Inherits="TestV BWebApp.WebForm 1"%>

It doesnt make sense to me why it needs to be like this ..Shouldnt it be
like the way i had declared..

John can u share ur thoughts about this.Also can u give an example when the
inherits value in "<%@ Page Language.." is going to be different.

--binod

"Binod Nair" <na*******@hotm ail.com> wrote in message
news:eJ******** ******@TK2MSFTN GP09.phx.gbl...

Hi All,

Can somebody tell me what I am doing wrong.

I have a Base Abstract Class

Public MustInherit Class BaseRequestHand ler : Inherits System.Web.UI.P age

Protected Overridable Sub Page_Load(ByVal sender As System.Object, ByVal e
As System.EventArg s) Handles MyBase.Load

SomeMethod()

End Sub

Public MustOverride Sub SomeMethod()

End Class

I have a Web Page which Inherits this base class

Public Class ManageCatalog : Inherits BaseRequestHand ler

Public Overrides Sub SomeMethod()

'Code Block

end sub

end class

When I try to run it , I get the error

Compiler Error Message: BC30610: Class 'ManageCatalog_ aspx' must either be
declared 'MustInherit' or override the following inherited 'MustOverride'
member(s): Public Overridable MustOverride Sub SomeMethod().

Plss Help.. I am doing something really stupid..

[John Saunders]

"Binod Nair" <na*******@hotm ail.com> wrote in message
news:%2******** ********@TK2MSF TNGP11.phx.gbl. ..

John thanks a lot

The problem was here

I HAD IT AS
<%@ Page Language="vb" AutoEventWireup ="false" Codebehind="Web Form1.aspx.vb" Inherits="TestV BWebApp.BaseReq uestHandler "%>

AND NOT LIKE WHAT John said
<%@ Page Language="vb" AutoEventWireup ="false" Codebehind="Web Form1.aspx.vb" Inherits="TestV BWebApp.WebForm 1"%>

It doesnt make sense to me why it needs to be like this ..Shouldnt it be
like the way i had declared..

John can u share ur thoughts about this.Also can u give an example when the inherits value in "<%@ Page Language.." is going to be different.

Here's the way it "normally" works when a CodeBehind page is used. You've
got page WebForm1.aspx. This is parsed and compiled into a class with a
generated name, like, ASPX_WebForm1. This class inherits from the class
mentioned in the Inherits attribute in the Page directive.

WebForm1.aspx.v b contains your codebehind class. It would declare a class
called WebForm1 in the TestVBWebApp namespace. The WebForm1 class inherits
from System.Web.UI.P age. So you have the following:

ASPX_WebForm1 ==> TestVBWebApp.We bForm1 ==> System.Web.UI.P age

An example of when this would be different is in the case where codebehind
is not used. In that case, the Inherits attribute says
Inherits="Syste m.Web.UI.Page". That is:

ASPX_WebForm1 ==> System.Web.UI.P age

As an example of when the Inherits in the codebehind would be different is a
situation like yours:

ASPX_WebForm1 ==> TestVBWebApp.We bForm1 ==> TestVBWebApp.Ba seRequestHandle r
==> System.Web.UI.P age

Note that in this case, you still need the Inherits="TestV BWebApp.WebForm 1",
since that's the class which ASPX_WebForm1 inherits directly from.
--
John Saunders
Internet Engineer
jo***********@s urfcontrol.com

[Binod Nair]

John..

Thanks a lot.I guess I need to keep reading rather than doing coding.

"John Saunders" <jo***********@ surfcontrol.com > wrote in message
news:e4******** ******@TK2MSFTN GP12.phx.gbl...

"Binod Nair" <na*******@hotm ail.com> wrote in message
news:%2******** ********@TK2MSF TNGP11.phx.gbl. ..

John thanks a lot

The problem was here

I HAD IT AS
<%@ Page Language="vb" AutoEventWireup ="false" Codebehind="Web Form1.aspx.vb"

Inherits="TestV BWebApp.BaseReq uestHandler "%>

AND NOT LIKE WHAT John said
<%@ Page Language="vb" AutoEventWireup ="false"

Codebehind="Web Form1.aspx.vb"

Inherits="TestV BWebApp.WebForm 1"%>

It doesnt make sense to me why it needs to be like this ..Shouldnt it be
like the way i had declared..

John can u share ur thoughts about this.Also can u give an example when

the

inherits value in "<%@ Page Language.." is going to be different.

Here's the way it "normally" works when a CodeBehind page is used. You've
got page WebForm1.aspx. This is parsed and compiled into a class with a
generated name, like, ASPX_WebForm1. This class inherits from the class
mentioned in the Inherits attribute in the Page directive.

WebForm1.aspx.v b contains your codebehind class. It would declare a class
called WebForm1 in the TestVBWebApp namespace. The WebForm1 class inherits
from System.Web.UI.P age. So you have the following:

ASPX_WebForm1 ==> TestVBWebApp.We bForm1 ==> System.Web.UI.P age

An example of when this would be different is in the case where codebehind
is not used. In that case, the Inherits attribute says
Inherits="Syste m.Web.UI.Page". That is:

ASPX_WebForm1 ==> System.Web.UI.P age

As an example of when the Inherits in the codebehind would be different is

a situation like yours:

ASPX_WebForm1 ==> TestVBWebApp.We bForm1 ==> TestVBWebApp.Ba seRequestHandle r ==> System.Web.UI.P age

Note that in this case, you still need the Inherits="TestV BWebApp.WebForm 1", since that's the class which ASPX_WebForm1 inherits directly from.
--
John Saunders
Internet Engineer
jo***********@s urfcontrol.com