Create SAP Web Service with SAP

.Net Connector in 5 minutes

Dennis Wang

Microsoft / EAS /SAP

What is SAP .NET Connector

• SAP product. Based on Microsoft .NET

Technology

• Interact with SAP via RFC/SOAP
• Fully integrated with Visual

Studio.NET

• Managed Code

Feature Highlight

• Generates C# Proxy Classes for any

.NET application integrations

• Supports RFC and SOAP
• Supports qRFC, tRFC
• Supports asynchronous SOAP calls
• RFC client or RFC server

Common Language
Runtime

.NET

Connector

Runtime

Web

Services

VB C++

C#

…

Visual

Studio.NET

Microsoft .NET

Proxy

Class

Generator

SAP System

BOR

DDIC

Interface

repository

RFC

SOAP

RFC Layer

Application

Run

time

.NET Connector

Component (generated)

Design

time

SOAP Layer

Feature of Web Service

• It is ASP.Net Web Service
• Hosted by IIS. Using HTTP protocol
• Secure: SSL for connection. NTLM for

authentication. Role base authorization.

• Single sign via NTLM GSSAPI
• Platform Neutral. Can be accessed via

http protocol.

• Strong versioning via XML Namespace

Steps to Create Web Service

for RFC_Customer_Get

• Create a C# project for ASP.Net Web

Service

• Generate SAP Proxy via SAP .Net Proxy

Generator for RFC_Customer_Get

• Open Proxy1.cs and change the following

line
public void Rfc_Customer_Get(…) to
public virtual void Rfc_Customer_Get (…)

Steps to Create Web Service for

RFC_Customer_Get (Continue)

• Open Service1.asmx and do the following

modification

1.

public class Service1 : SAPProxy1

2.

public override void Rfc_Customer_Get (…)

3.

Add these code in this mothed

this.Connection = SAP.Connector.SAPConnectionPool.GetConnection

(MyConnectionString);

base.Rfc_Customer_Get(Kunnr,Name1, ref Customer_T);

• Compile the code and you have the web

service for this RFC.

Client
DomainA\dennisw
Run Window app
and
Call Web Service

Web Service runs
under
DomainA\ProcAcct
credential. This
account then calls
SAP RFC

1. SAP check

DomainA\ProcAcct in
USRSYSACL

2. SAP check

DomainA\dennisw in
vusrextid

3. SAP check dennisw in

USRACL

4. Run SAP process

under dennisw
account

How SAP Single Sign On

work under ASP.Net Web

Service

Set up single sign on for web

service

•

IIS Configuration

–

Disable anonymous access

–

Set up Windows Integrated Authentication

•

Web Service Configuration

–

Generate encrypted user name and password via

aspnet_setreg.exe program. This value will then be set up

in registry. Here we assume the user name is SAPCMDEV

–

Add the following line in Web.Config

•

<identity impersonate=”true”

sername=”registry:HKLM\Software\SapWebService\

Identity\ASPNET_SETREG,sername”

•

password=”registry:HKLM\Software\SapWebService

\Identity\ASPNET_SETREG,password” />

Set up single sign on for web service -

Continue

• GSS Library

–

Requires on the server where Web Service is

located.

–

Copy the GSSNTLM.DLL to

c:\windows\system32

–

If the GSSNTLM.DLL was copied to a folder

other then within the environment search path,

you need to add the following line in system

environment SNC_LIB=”file path\GSSNTLM.dll”

• Make sure to replace the gssapi32.dll with

this GSSNTLM.dll if the old gssapi32.dll

exists. The old gssapi32.dll does not work.

Set up single sign on for web service -

Continue

•

Create Entry in Table SNCSYSACL via SNC0

•

This table contains a list of trusted domain accounts or
SNC.

•

Start SAP and run SNC0

•

Make sure to enable the RFC/CPIC/Ext ID options

Set up single sign on for web service -

Continue

• Make sure all users who access

SAP will have their User

Accounts in USRACL or via SU01

• Mapping external users into

SAP users

• Run SM30 and table VUSREXTID
• Value: Work Area=NT.
• Value: External ID =

MYDomain\dennisw

Set up single sign on for web service -

Continue

• Program The Connection String with

the following value:

– SNC_MODE=1;
– SNC_PARTNERNAME="p:" +

System.Security.Principal.WindowsIdenti

ty.GetCurrent().Name; ‘ Web Service

Process Account

– EXTIDDATA=User.Identity.Name; ‘Caller

credential

– EXTIDTYPE=“NT”;

Access SAP Web Service via

Microsoft InfoPath

ERP – RDBMS – HR - CRM

ERP – RDBMS – HR - CRM

ERP – RDBMS – HR - CRM

ERP – RDBMS – HR - CRM

Information Workers

Information Workers

Information Workers

Information Workers

Enterprise Applications

Enterprise Applications

Enterprise Applications

Enterprise Applications

XML

XML

Web

Web

Services

Services

XML

XML

Web

Web

Services

Services

You can use intelligent forms to interact with your existing

You can use intelligent forms to interact with your existing

applications

applications

You can use intelligent forms to interact with your existing

You can use intelligent forms to interact with your existing

applications

applications

How does InfoPath 2003 connect to

SAP?

• Utilize SAP RFC and BAPI.
• Generate RFC/BAPI proxy by using SAP .Net

Connector

• Create Web Service Wrapper around the proxy
• Hosting/Publish the web service via WSDL
• InfoPath Consume the web service

Demo

Resource

• SAP .Net Connector:

https://websmp103.sap-ag.de/connectors

• InfoPath 2003 SDK

– Available on

microsoft.com

under downloads

• InfoPath 2003, Technical Webcasts, Technical White Papers,

Development Guides

– MSDN
–

http://msdn.microsoft.com/office/understanding/InfoPath 2003/

• Visit

http://microsoft-sap.com

for information on:

– SAP at Microsoft
– SAP .Net Connector
– Upcoming customer workshops