[2005] Generic & ParamArray

[Coool]

Hi all,

I m working on project i which i have to make one method which accept multiple parameter of the Generic class. But the problem is while declaring the function.

Let me clear the vision.

Class SqlParam(Of T)

        Public obj As T

        Sub New(ByVal parameterName As String, ByVal type As System.Data.SqlDbType, ByVal size As Integer, ByVal value As T, Optional ByVal isNullable As Boolean = False)
            'Action
        End Sub

    End Class

Now I want to make one method in another class that Insert the record in DB using function having ParamArray of Generic Class object.

Like

Class SqlHelper

Public Sub Insert(ByVal ParamArray parameters() As SqlParam(Of Object))
'Action Here
End Sub
End Class

What should i defined there inplace of Object maked red. Bec'z I want to Achieve this

Dim objSql As New SqlHelper()
objSql.Insert(New SqlParam(Of String)("@ID", SqlDbType.VarChar, 1000, "Coool"), New SqlParam(Of Integer)("@Total", SqlDbType.Int, 50, 23))

I know there are other methods but I am using generic class bec'z i want type safety. Hope you can focus on this.

Thanks in Advance.

[Coool]

Anybody plz.. Is there any alternative way for this but with type safety?

[jmcilhinney]

What you're asking for is not possible. I'd suggest that you declare a common base class or common interface, then have your generic class inherit or implement that. You can then use that type as the type of your paramarray.

When you define a generic class you're actually defining a whole family of classes. You cannot then declare a parameter whose tpye is a family of classes. It must be one single class out of that family.

[Coool]

Thanks for reply. Is there any other method in ur eye which provide the same functonality with type safety?