ReadOnly Property Inheritance

[James.R.Thigpen]

I am trying to create a read-only interface for an object.

Say I have a Part, which I want to Implement IReadOnlyPart.
IReadOnlyPart will have

ReadOnly Property PartNumber() As String

And I *want* Part to have

Public Property PartNumber() As String Implements
IPart.PartNumber
Get
Return partNumberValue
End Get
Set(ByVal value As String)
partNumberValue = value
End Set
End Property

But that is a compile error "Error 72 'PartNumber' cannot implement
'PartNumber' because there is no matching property on interface
'IPart'."

Is there any way to get this to work or is this simply not How Things
Are Done.

Thanks,

James Thigpen

[Herfried K. Wagner [MVP]]

<Ja*************@gmail.comschrieb:

>I am trying to create a read-only interface for an object.

Say I have a Part, which I want to Implement IReadOnlyPart.
IReadOnlyPart will have

ReadOnly Property PartNumber() As String

And I *want* Part to have

Public Property PartNumber() As String Implements
IPart.PartNumber
Get
Return partNumberValue
End Get
Set(ByVal value As String)
partNumberValue = value
End Set
End Property

But that is a compile error "Error 72 'PartNumber' cannot implement
'PartNumber' because there is no matching property on interface
'IPart'."

Is there any way to get this to work or is this simply not How Things
Are Done.

Unfortunately what you want to archieve is not supported by the VB compiler.
You may want to implement the 'Set' part as a function instead ('Function
SetPartNumber').

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://dotnet.mvps.org/dotnet/faqs/>

[James.R.Thigpen]

Ok, Thanks. Does C# let you do this or is it a .net idiom?

James

On Feb 27, 12:18 pm, "Herfried K. Wagner [MVP]" <hirf-spam-me-
[e-mail]:

<[e-mail]:

I am trying to create a read-only interface for an object.

Say I have a Part, which I want to Implement IReadOnlyPart.
IReadOnlyPart will have

ReadOnly Property PartNumber() As String

And I *want* Part to have

Public Property PartNumber() As String Implements
IPart.PartNumber
Get
Return partNumberValue
End Get
Set(ByVal value As String)
partNumberValue = value
End Set
End Property

But that is a compile error "Error 72 'PartNumber' cannot implement
'PartNumber' because there is no matching property on interface
'IPart'."

Is there any way to get this to work or is this simply not How Things
Are Done.

Unfortunately what you want to archieve is not supported by the VB compiler.
You may want to implement the 'Set' part as a function instead ('Function
SetPartNumber').

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://dotnet.mvps.org/dotnet/faqs/>

[rowe_newsgroups]

On Feb 27, 4:06 pm, [e-mail] wrote:

Ok, Thanks. Does C# let you do this or is it a .net idiom?

James

On Feb 27, 12:18 pm, "Herfried K. Wagner [MVP]" <hirf-spam-me-

[e-mail]:

<[e-mail]:

>I am trying to create a read-only interface for an object.

Say I have a Part, which I want to Implement IReadOnlyPart.
IReadOnlyPart will have

ReadOnly Property PartNumber() As String

And I *want* Part to have

Public Property PartNumber() As String Implements
IPart.PartNumber
Get
Return partNumberValue
End Get
Set(ByVal value As String)
partNumberValue = value
End Set
End Property

But that is a compile error "Error 72 'PartNumber' cannot implement
'PartNumber' because there is no matching property on interface
'IPart'."

Is there any way to get this to work or is this simply not How Things
Are Done.

Unfortunately what you want to archieve is not supported by the VB compiler.
You may want to implement the 'Set' part as a function instead ('Function
SetPartNumber').

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://dotnet.mvps.org/dotnet/faqs/>

It's a CLR thing so it's not just VB.

Thanks,

Seth Rowe [MVP]

[Herfried K. Wagner [MVP]]

Seth --

"rowe_newsgroups" <ro********@yahoo.comschrieb:

>I am trying to create a read-only interface for an object.

Say I have a Part, which I want to Implement IReadOnlyPart.
IReadOnlyPart will have

ReadOnly Property PartNumber() As String

And I *want* Part to have

Public Property PartNumber() As String Implements
IPart.PartNumber
Get
Return partNumberValue
End Get
Set(ByVal value As String)
partNumberValue = value
End Set
End Property

But that is a compile error "Error 72 'PartNumber' cannot implement
'PartNumber' because there is no matching property on interface
'IPart'."

Is there any way to get this to work or is this simply not How Things
Are Done.

Unfortunately what you want to archieve is not supported by the VB
compiler.
You may want to implement the 'Set' part as a function instead
('Function
SetPartNumber').

It's a CLR thing so it's not just VB.

No, it's actually a VB limitation. C# lets you do it.

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://dotnet.mvps.org/dotnet/faqs/>