SAP接口编程之 NCo3.0系列(07) : 异常处理

基类：RfcBaseException

nco3.0中异常的基类是RfcBaseException, 继承自ApplicationException。其他一些重要的异常类说明如下：

其他常见异常类

RfcCommunicationException

• 继承自RfcBaseException
• 与后台SAP系统通讯失败时，引发此异常，比如网络问题，SAP服务器没有启动等。

RfcLogonException

• 继承自RfcBaseException
• SAP系统拒绝用户登录，比如密码错误等引发的异常。

RfcInvalidParameterException

• 继承自RfcBaseException
• 如果参数不存在，或者参数名不正确，会引发该异常。

RfcAbapBaseException

• 继承自RfcBaseException, 是Abap异常的基类

示例

using System;using SAP.Middleware.Connector;namespace NCo03{    public class ExceptionHandlingDemo    {        public void WriteTCPIC()        {            // the folowing lines will be added to TCPIC table in SAP system            String[] lines = new String[] {                 "轻轻的我走了，",                 "正如我轻轻的来，",                "我轻轻的招手，",                "作别西天的云彩。"};            try {                RfcDestination dest = NCo02.DestinationProvider.GetDestination();                IRfcFunction fm = dest.Repository.CreateFunction("STFC_WRITE_TO_TCPIC");                IRfcTable tcpicData = fm.GetTable("TCPICDAT");                tcpicData.Append(lines.Length); // insert lines according to lines.Length                for (int i = 0; i < lines.Length; i++) {                    tcpicData[i].SetValue("LINE", lines[i]);                }                fm.Invoke(dest);            }            catch (RfcCommunicationException ex) {                // network problem                System.Console.WriteLine(ex.ToString());            }            catch (RfcLogonException ex) {                // user could not log on                System.Console.WriteLine(ex.ToString());            }            catch (RfcAbapBaseException ex) {                // ABAP excpeption                System.Console.WriteLine(ex.ToString());            }        }    }}

说明

• STFC_WRITE_TO_TCPIC函数将字串中插入到TCPIC表中，函数适合做演示之用
• 如果插入table parameter的参数有规律，可以参考本例中的代码

NCo3.0系列的参考文档

• SAP .NET Connector 3.0官方帮助
  http://help.sap.com/saphelp_crm700_ehp02/helpdata/EN/4a/097b0543f4088ce10000000a421937/content.htm

• A Spotlight on the New .NET Connector 3.0
  http://scn.sap.com/people/thomas.weiss/blog/2011/01/14/a-spotlight-on-the-new-net-connector-30

• Add items to IRfcTable
  http://stackoverflow.com/questions/4783739/add-items-to-irfctable

• SAP NCo 3.0: How-to Pass Table Parameters to SAP RFC
  http://www.dataxstream.com/2012/03/sap-nco-3-0-how-to-pass-table-parameters-to-sap-rfc/

• SAP .Net Connector 3.0 (NCo) Example
  http://www.codeproject.com/Articles/824928/SAP-Net-Connector-NCo-Example

• .NET连接SAP系统专题
  http://www.cnblogs.com/mengxin523/category/315696.html