How call visual basic property getter with arguments in C# solutions

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Hi all,

I've written a long time ago a long Visual Basic project, where a class has several properties with multiple arguments.

Now I should implement that project in an existing solution written in C#. The only way I found to call these property getter/setter is through reflection.
Do you know another way?

What I have tried:

VB

VB
Public Class Manager
    Public Property Message() As String
        Get
            Return Message(Nothing, Nothing)
        End Get
        Set(value as String)
            Message(Nothing, Nothing) = value
        End Set
    End Property
    Public Property Message(useSQLInfo As Boolean?) As String
        Get
            Return Message(useSQLInfo, Nothing)
        End Get
        Set(value as String)
            Message(useSQLInfo, Nothing) = value
        End Set
    End Property
    Public Property Message(useSQLInfo As Boolean?, manageRN As Boolean?) As String
        Get
            [...]
        End Get
        Set(value as String)
            [...]
        End Set
    End Property
End Class

C#

C#
class Foo {
    Manager manager = CreateManager();
    [...]
    void SaveExchange([...]) {
        if (manager != null) {
            string managerMessage = ManagerGetMessage(manager, true, null);
            [...]
        }
    }
    private static MethodInfo mgmMethodInfo = null;
    string ManagerGetMessage(Manager manager, bool? useSQLInfo, bool? manageRN) {
        if (mgmMethodInfo == null)
            mgmMethodInfo = manager.GetType().GetProperty("Message", typeof(string),
                    new Type[] { typeof(bool?), typeof(bool?) } ).GetGetMethod();
        return mgmMethodInfo.Invoke(manager, new object[] { useSQLInfo, manageRN} );
    }
}

If anyone knows another method is well accepted.

Thank you
Lucio

Posted 25-Jul-17 0:14am

Menci Lucio

Updated 25-Jul-17 0:27am

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Comments

Graeme_Grant 25-Jul-17 6:18am

Are you trying to use both VB & C# in the same compiled DLL/EXE or are each in their own DLL/EXE?

Menci Lucio 25-Jul-17 6:40am

They are two different projects that create different dll/exe in the same solution (for debugging). I was able to call all methods and other properties of Manager inside the C# project.

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Graeme_Grant · Accepted Answer · 2017-07-25T00:27:00

If the VB code is in a class library, then you can reference and use it like you can a C# class library.

Here is a test to show how this works:

1. Add a C# Console app to a solution
2. Add a VB class library to the solution
3. reference the VB class Library in the C# console app
4. use the following code:

VB Class Library

VB

Public Class Class1

    Public Function GetString() As String
        Return "Hello from VB!"
    End Function

End Class

C# Console app

C#

namespace ConsoleTest
{
    class Program
    {
        static void Main(string[] args)
        {
            var vbClass = new ClassLibrary1.Class1();

            Console.WriteLine(vbClass.GetString());
            Console.ReadKey();
        }
    }
}

5. Now compile and run and it will work. :)

** Property Test update

VB Class Library

VB

Public Class Class1

    Public Function GetString() As String
        Return "Hello from VB!"
    End Function

    Private test As String
    Public Property TestProperty() As String
        Get
            Return test
        End Get
        Set(ByVal value As String)
            test = value
        End Set
    End Property

End Class

C# Console app

C#

using System;

namespace ConsoleTest
{
    class Program
    {
        static void Main(string[] args)
        {
            var vbClass = new ClassLibrary1.Class1();

            // Test 1
            Console.WriteLine(vbClass.GetString());

            // Test 2
            vbClass.TestProperty = "This is a VB property test";
            Console.WriteLine(vbClass.TestProperty);

            Console.ReadKey();
        }
    }
}

Output

Hello from VB!
This is a VB property test

** Update 2: Accessing VB Property with paramater
Intellisense had the answer for you. See below:

VB Class Library

VB

Imports System.Runtime.CompilerServices

Public Class Class1

    Public Function GetString() As String
        Return "Hello from VB!"
    End Function

    Private test As String
    Public Property TestProperty() As String
        Get
            Return test
        End Get
        Set(ByVal value As String)
            test = value
        End Set
    End Property

    Public Property Message() As String
        Get
            Return Message(Nothing, Nothing)
        End Get
        Set(value As String)
            Message(Nothing, Nothing) = value
        End Set
    End Property
    Public Property Message(useSQLInfo As Boolean?) As String
        Get
            Return Message(useSQLInfo, Nothing)
        End Get
        Set(value As String)
            Message(useSQLInfo, Nothing) = value
        End Set
    End Property

    Private flag1 As Boolean?
    Private flag2 As Boolean?
    Private messageText As String

    Public Property Message(useSQLInfo As Boolean?, manageRN As Boolean?) As String
        Get
            Return messageText
        End Get
        Set(value As String)
            messageText = value
        End Set
    End Property

End Class

C# Console app

C#

using System;

namespace ConsoleTest
{
    class Program
    {
        static void Main(string[] args)
        {
            var vbClass = new ClassLibrary1.Class1();

            // Test 1
            Console.WriteLine(vbClass.GetString());

            // Test 2
            vbClass.TestProperty = "This is a VB property test";
            Console.WriteLine(vbClass.TestProperty);

            // test 3
            vbClass.set_Message(true, "test message");
            Console.WriteLine(vbClass.get_Message(true));

            Console.ReadKey();
        }
    }
}

How call visual basic property getter with arguments in C# solutions

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