SAP logon pad with NCo and visual studio 2003

Question

Hi All,
I'm struggling to find a way in visual studio 2003 utilising the dot net connector to allow the user to select the SAP system, client user name and password in a similar way that happens when done with activeX controls.
E.g. with ActiveX this sort of code:
Dim sapConn As Object 'Declare connection object
Set sapConn = CreateObject("SAP.Functions") 'Create ActiveX object
If sapConn.Connection.Logon(0, False) <> True Then
The false in the last line prevents a silent logon i.e. a little pop up window is created with the server, client etc. for the user to select and fill in.
I have been trying to use methods like availabledestinations and getdestinationbyname as well as the destinationname property of the saplogon proxy I dropped on my form. In fact I can see all the destinations when I drop down on the destinationname property on the proxy logon object. I though of maybe binding this to a list box but I can't seem to get that to work.
I also tried setting the SAPgui value to 0,1 or 2 on the proxy logon object but this had no effect.
Is there not a simple way of doing this similar to the ActiveX approach?
PS. This is a windows forms project and not a web project.
Thanks,
Grant.

Answer 1

Hi Jitesh,
Thanks for the quick response!
I declared _e as an iDictionaryEnumerator, is that correct?
So the code looks like this:
Dim _e As IDictionaryEnumerator
        For Each _destEntry As System.Collections.DictionaryEntry In SapLogonDestination1.AvailableDestinations
            Dim _destText As String = _e.Value.ToString
            Dim _destKey As String = _e.Key.ToString
        Next
I get a Nullreference error: Object reference not set to an instance of an object at the line Dim _destText As String = _e.Value.ToString.
What have I done wrong?
Thanks,
Grant.