From C# to VB.NET

[Robert Scheer]

Hi.

I am trying to port a library from C# to VB.NET. I have 95% of this
code already ported, but I do not know how to translate the line
below:

public override ProblemCollection Check(Member member)
{
Method method = member as Method;
....
}

What kind of construct is this? Is there an equivalent construct in
VB.NET?

Regards,
Robert Scheer

 

[rowe_newsgroups]

Hi.

I am trying to port a library from C# to VB.NET. I have 95% of this
code already ported, but I do not know how to translate the line
below:

public override ProblemCollection Check(Member member)
{
Method method = member as Method;
....
}

What kind of construct is this? Is there an equivalent construct in
VB.NET?

Regards,
Robert Scheer

Off the top of my head:

Public Overrides Function Check(member as Member) As ProblemCollection
Dim method As Method = CType(member, Method)
End Function

Thanks,

Seth Rowe

 

[sloan]

VB.net is not case sensitive.

so in C#


Employee employee = new Employee();

will work

in VB.net

dim employee as Employee = new Employee()

will NOT work
you gotta go with

dim emp as Employee = new Employee

(or similar)

watch those properties too for case sensitivity.

 

[Guest]

The equivalent is not a simple 'CType'.
(via Instant VB)
VB 2005:
Dim method As Method = TryCast(member, Method)
VB 2003:
Dim method As Method = CType(IIf(TypeOf member Is Method, member, Nothing),
Method)

As 'sloan' mentioned you'll also have to rename 'method' since VB is not
case sensitive.
--
David Anton
www.tangiblesoftwaresolutions.com
Instant C#: VB to C# converter
Instant VB: C# to VB converter
C++ to C# Converter: converts C++ to C#
Instant C++: converts C# or VB to C++/CLI

 

[rowe_newsgroups]

dim emp as Employee = new Employee

(or similar)

watch those properties too for case sensitivity.

Actually vb lets you get away with a variable the same name as a Type.
It just won't let you have two variables of the same (case
insensitive) name like in C#

i.e.

This compiles fine:

Dim employee As New Employee()
employee.Name = "Seth Rowe"
Console.WriteLine(employee.Name)

And even this will work:

Dim Employee As New Employee()
Employee.Name = "Seth Rowe"
Console.WriteLine(Employee.Name)

However in C# you can do this:

Employee Employee = new Employee();
Employee employee = new Employee();
Employee.Name = "Employee 1";
employee.Name = "employee 2";
Console.WriteLine(Employee.Name);
Console.WriteLine(employee.Name);

But the VB version will fail due to case insensitivity:

Dim Employee As New Employee()
Dim employee As New Employee()
Employee.Name = "Employee 1"
employee.Name = "employee 2"
Console.WriteLine(Employee.Name)
Console.WriteLine(employee.Name)

However, for sake of readability, I would follow you suggestion of
using a shortened version of the type name for the variable.

Thanks,

Seth Rowe

 

[Guest]

dim employee as Employee = new Employee()

will NOT work
you gotta go with

Actually that does work...

 

[rowe_newsgroups]

The equivalent is not a simple 'CType'.

Thanks David, I forgot "as Type" returned null if the cast failed.
Fortunately I tagged my post with "Off the top of my head"



Thanks,

Seth Rowe

 

[sloan]

Hmmm.

You're right, I guess I assumed it would fail, and never tested it.

But ... (as mentioned) readability and prone to bugs is still an issue.

THanks for the correction.

 

[Mythran]

Hi.

I am trying to port a library from C# to VB.NET. I have 95% of this
code already ported, but I do not know how to translate the line
below:

public override ProblemCollection Check(Member member)
{
Method method = member as Method;
....
}

What kind of construct is this? Is there an equivalent construct in
VB.NET?

Regards,
Robert Scheer

Either use the inline-if method post from David Anton or:

Public Overrides Function Check(member As Member) As ProblemCollection
Dim method As Method = Nothing
If TypeOf method Is Method
method = CType(method, Method)
End If
...
End Function

AFAIK, using the IIF statement will cause extra (albeit, very small amount
of) overhead because IIF is actually a function itself...remember though,
it's probably negligible for your application...

HTH,
Mythran

 

[Michael D. Ober]

Turn Option Strict On. Then the compiler will warn you when you give a
variable the same name as a type.

Mike.

 

[rowe_newsgroups]

Turn Option Strict On. Then the compiler will warn you when you give a
variable the same name as a type.

Mike.





Turn Option Strict On. Then the compiler will warn you when you give a
variable the same name as a type.

It does? None of the examples I posted earlier caused a warning to
show. Do you have an example demonstrating this?

Thanks,

Seth Rowe

 

[sloan]

Aha!

I default to that, including setting it in the project properties.

And I set it to "Raise Exception".

Sorry, I only occasionally code vb.net.

Thanks Michael for solving the (small) mystery.

 

[Galen Somerville]

Hi.

I am trying to port a library from C# to VB.NET. I have 95% of this
code already ported, but I do not know how to translate the line
below:

public override ProblemCollection Check(Member member)
{
Method method = member as Method;
....
}

What kind of construct is this? Is there an equivalent construct in
VB.NET?

Regards,
Robert Scheer

I use a C# to VB converter named Instant VB from
http://www.tangiblesoftwaresolutions.com/

You can get a trial copy. I put your code snippet in and got the answer that
several people have given you.

Galen

 

[Jay Parzych]

I use a C# to VB converter named Instant VB from
http://www.tangiblesoftwaresolutions.com/

You can get a trial copy. I put your code snippet in and got the
answer that several people have given you.

Galen

here are a few free convertors

http://www.econdimension.ch/en/sol_netvert.html

http://converter.telerik.com

 

[Guest]

Did you try the OP's code on these free converters? (you might want to do
that)
--
David Anton
www.tangiblesoftwaresolutions.com
Instant C#: VB to C# converter
Instant VB: C# to VB converter
C++ to C# Converter: converts C++ to C#
Instant C++: converts C# or VB to C++/CLI

 

[rowe_newsgroups]

It does? None of the examples I posted earlier caused a warning to
show. Do you have an example demonstrating this?

Thanks,

Seth Rowe

Sorry for reviving this thread - but I still can't get a warning from
the compiler for naming a variable the same name as a Type, even with
Option Strict On. Is there an option I'm missing somewhere?

Thanks,

Seth Rowe