InfoBar on Transactional IDO Extension Method

dean-bradko

I am using IDO extension methods to automate tedious shop floor data collection tasks.  I set the Transactional flag and these methods work very well except when there is a validation error in any of the IDO method calls made from within my extension method.  Since the internal method call will roll back the transaction when a validation error is encountered, I get a "Transaction was aborted" exception and am unable to read the contents of InfoBar to determine what the validation issue was.

Pseudo Code Example:

    Sub MyExtensionMethod(job, qtyComplete, infoBar, success)
        Execute IDO Method CreateJobTran(job, qtyComplete, infoBar, success)
    
        If successs continue

        Grab material to backflush

        Execute IDO Method CreateBFlushLot(job, item, lot, qtyRequired, infoBar, success)

        If success continue

        Execute IDO Method PostJobTran(job, infoBar, success)

            ***Exception occurs (Transaction was aborted)

If I was able to read InfoBar after calling PostJobTran, it might read something like "Item xxx is obsolete" or "Operation is complete".  However, because this is wrapped in an outter transaction and rollback is called from inside PostJobTran, all I get is a "Transaction was aborted" exception.

Does anyone know a way around this without clearing the Transactional Flag on my IDO method?  My interim workaround is to manually pre-validate but it's pretty much impossible to account for every validation in every IDO method call.

unknown

You should be able to get to the Infobar details after method execution by retrieving the parameter index value of the InvokeResponse.
Here's some boilerplate. Assume the IDO method in this boilerplate takes one input parameter and a MESSAGE parameter. 

[IDOMethod(MethodFlags.None, "Infobar")]
public int YourAssemblyMethod(string InputParm, ref string Infobar)
{
     int returnVal = 0;

     InvokeRequestData invReq = new InvokeRequestData();
     invReq.IDOName = "YourIDO";
     invReq.MethodName = "YourMethod";
     invReq.Parameters.Add(InputParm);
     invReq.Parameters.Add(IDONull.Value);

     try 
     {
          InvokeResponseData invResp = this.Context.Commands.Invoke(invReq);

          if (!invResp.IsReturnValueStdError())
         {
              Infobar = "Success";
         }
         else
         {
              Infobar = invResp.Parameters[1].Value;
              returnVal = 18;
         }
     }
     catch (Exception ex)
     {
          Infobar = ex.Message;
          returnVal = 18;
     }

     return returnVal;

}