VB.net "'Me' is valid only within an instance method" inside PageMethods

I'm getting "Me' is valid only within an instance method" error when I convert function to a PageMethods.

Private Shared objDT As System.Data.DataTable
Private Shared objDR As System.Data.DataRow

<WebMethod()> Public Shared Function addstn(itemID As String) As String
  For Each Me.objDR In objDT.Rows
        开发者_高级运维    If objDR("ProductID") = ProductID Then
                If objDR("Options") = desc Then
                    objDR("Quantity") += 1
                    blnMatch = True
                    Exit For
                End If
            End If
  Next

End Function

If I remove Me, I get different error. I got this shopping cart script somewhere online and I'm not sure what to replace "Me.objDR" with something else.

Thank you in advance

---

The Me keyword provides a way to refer to the specific instance of a class or structure in which the code is currently executing.

In a shared context there is no instance. You can reference your variable directly or via ClassName.VariableName.

This could work(i'm not sure wherefrom the other variables are):

For Each objDR In objDT.Rows
        If ProductID.Equals(objDR("ProductID")) _
           AndAlso desc.Equals(objDR("Options"))Then
                Dim q = CInt(objDR("Quantity"))
                objDR("Quantity") = q + 1
                blnMatch = True
                Exit For
        End If
Next

http://msdn.microsoft.com/en-us/library/20fy88e0%28v=vs.80%29.aspx

---

Me cannot be used since its a shared method, shared methods are not accessed through an instance.

What is the other error you receive?

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Public Shared Function addstn(...

The "Shared" means it's not an instance method. If you want to use "Me", you can't use "Shared". Use the name of the class/module instead.