Have a look at my RFC call, it doesn't return anything

Question

Hi all,
In my project, I create a RFC Model named 'SCO' which will call bapi function 'BAPI_SALESORDER_CREATEFROMDAT1', if successfully a SALEDOCUMENT should return.
below is the code in my custom controller
  public void wdDoInit()
    //@@begin wdDoInit()
          Bapi_Salesorder_Createfromdat1_Input input =
               new Bapi_Salesorder_Createfromdat1_Input();
          wdContext.nodeCSOC_Input().bind(input);
          input.setOrder_Header_In(new Bapisdhead());
          input.addOrder_Items_In(new Bapiitemin());
          input.addOrder_Partners(new Bapipartnr());
    //@@end
public void executeBapi( )
    //@@begin executeBapi()
          try {
               wdContext.currentCSOC_InputElement().modelObject().execute();
          } catch (WDDynamicRFCExecuteException e) {
               // TODO Auto-generated catch block
               System.err.println(e.getMessage());
               e.printStackTrace();
          } finally {
//               wdContext.nodeCSOC_Input().invalidate();
    //@@end
In my view(TestSOCView) I mapped a node named SOC_Input has the structure
Order_Header_In
-Distr_Chan
-Division
-Doc_Type
-Sales_Org
Order_Partnr_In
-Partn_Numb
-Partn_Role
Order_Items_In
-Material
-Req_Qty
Output
-Return
--Message
--Type
-Salesdocument
I have a very simple view which has only one button and two textview (one bind to Output-Salesdocument, another to Output-Return-Message)
In my action method, I have the code
  public void onActionCreateSO(com.sap.tc.webdynpro.progmodel.api.IWDCustomEvent wdEvent )
    //@@begin onActionCreateSO(ServerEvent)
          IOrder_Header_InElement newHeader =
               wdContext.currentOrder_Header_InElement();
          IOrder_PartnersElement newPartner =
               wdContext.createOrder_PartnersElement(new Bapipartnr());
          IOrder_Items_InElement newItem =
               wdContext.createOrder_Items_InElement(new Bapiitemin());
          newHeader.setSales_Org("1000");
          newHeader.setDoc_Type("OR");
          newHeader.setDistr_Chan("10");
          newHeader.setDivision("00");
//          wdContext.nodeOrder_Header_In().addElement(newHeader);
          newPartner.setPartn_Role("SP");
          newPartner.setPartn_Numb("1000");
          wdContext.nodeOrder_Partners().addElement(newPartner);
          newItem.setMaterial("TEST2");
          newItem.setReq_Qty("00001000");
          wdContext.nodeOrder_Items_In().addElement(newItem);
          wdThis.wdGetSOCControllerController().executeBapi();
    //@@end
This is all my implementation, I dont know why there's always nothing retrieved, even no Return Message.
I of course have the right JCO connection, if not, this view will not display.
My wonder is my initilization for two table maybe wrong:
input.addOrder_Items_In(new Bapiitemin());
input.addOrder_Partners(new Bapipartnr());
because I know there's a method
set<Node>(AbstractList)
but this is not java.util.AbstractList, I dont know how to initiate this list.
And if I follow the turtorial which will enable the line after execution
wdContext.nodeCSOC_Input().invalidate();
This will make my application run only one time, the second time a NullPointerException will be thrown. So there's also a question: what's the usage of this line?
Any one have a look at my problem? Thanks in advance
And at last,
Happy New Year to everyone.
Wish you all a nice new year.
best regards,
William

Answer 1

Hello William,
Try using the following code:
public void wdDoInit()
//@@begin wdDoInit()
    Bapi_Salesorder_Createfromdat1_Input input =
    new Bapi_Salesorder_Createfromdat1_Input();
//@@end
public void onActionCreateSO(com.sap.tc.webdynpro.progmodel.api.IWDCustomEvent wdEvent )
//@@begin onActionCreateSO(ServerEvent)
<b>/*** Instantiate the Structure ***/
/// <Name of the Structure> = <Order_Header_In></b>   Order_Header_In newHeader =
    new Order_Header_In();
    newHeader.setSales_Org("1000");
    newHeader.setDoc_Type("OR");
    newHeader.setDistr_Chan("10");
    newHeader.setDivision("00");
    wdContext.currentBapi_Salesorder_Createfromdat1_Input().setOrder_Header_In(newHeader);
<b>*** Instantiate the Structure ***/
/// <Name of the Structure> = <Order_Partners></b>    Order_Partners newPartner = new Order_Partners();
    newPartner.setPartn_Role("SP");
    newPartner.setPartn_Numb("1000");
    wdContext.currentBapi_Salesorder_Createfromdat1_Input().modelObject().addOrder_Partners(newPartner);
<b>*** Instantiate the Structure ***/
/// <Name of the Structure> = <Order_Items_In></b>    Order_Items_In newItem = new Order_Items_In();
    newItem.setMaterial("TEST2");
    newItem.setReq_Qty("00001000");
             wdContext.currentBapi_Salesorder_Createfromdat1_Input().modelObject().addOrder_Items_In(newItem);
    wdThis.wdGetSOCControllerController().executeBapi();
//@@end
This will work.
<b>
Please reward appropriate points</b>
Bala