using Microsoft.VisualBasic.Collection

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using Microsoft.VisualBasic.Collection

Hi,

I was trying to use Microsoft.VisualBasic.Collection by adding reference to Microsoft.VisualBasic.dll in my project. I am facing problem with its Add method.

In Object Browser, I got this information about this method:

public void Add(object Item, string Key, object Before, object After)

It says last thee arguments are optional.

But whenever I try Add method with 1 / 2 /3 arguments then it gives me error at compile time that "No overload for method 'Add' takes '1' (or '2' or '3') arguments"

e.g.

using Microsoft.VisualBasic;

Collection a = new Collection();

int i =10;

a.Add(i);

It is giving me error. How can I add objects to my collection

I tried with 2 or 3 args then also same compile time error. And if I give all 4 args then I get run time crash as both "Before" and "after" can't be specified together.

-Aaryan

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using Microsoft.VisualBasic.Collection

  • NeederOfVBHelp

    Suppliers of class libraries should make sure that their code is CLS compliant, i.e., can be used from any .Net language. Is it possible for you to point this out to the people who wrote the application you are calling, and to get them to change their API so it does not return a VisualBasic collection

  • cbpd86

    System.Reflection.Missing.Value is used to signify that the argument is to be ignored from a .NET language which doesn't have optional parameters.

    But.... why are you using the VisualBasic Collection There are many lists and collections in .NET that should suffice. Also, you can roll your own easily if you want something similar to the quirky VisualBasic Collection.

    David Anton
    www.tangiblesoftwaresolutions.com
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  • Tb2006

    David, Thanks for the reply.

    I've to use VisualBasic collection because I am using OM of an application and calling one API in its OM returns me VisualBasic Collection.

    Thanks,

    Aaryan

  • Alastair Q

    The VB Collection can be used from any .NET language (but it is not CLS compliant).

    However, the VB Collection is an unusual object to return from an API.

    David Anton
    www.tangiblesoftwaresolutions.com
    Instant C#: VB to C# converter
    Instant VB: C# to VB converter
    Instant C++: C# to C++ converter, VB to C++ converter
    Clear VB: Cleans up VB.NET code
    C# Code Metrics: Quick metrics for C#



  • using Microsoft.VisualBasic.Collection
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