Release 10.1A: OpenEdge Development:
.NET Open Clients

Passing INPUT parameters

Passing an INPUT parameter requires several steps to provide a value as input to an application service procedure or user-defined function.

To pass an INPUT parameter:

Create and initialize a variable for the parameter of the correct .NET data type (see the "Creating variables for parameters" section).
Add the parameter to a ParamArray object (see the "Setting up a parameter array" section).
Run the procedure or user-defined function (see the "Running procedures and user-defined functions" section).

Example 8–3 passes an INPUT integer parameter that does not support the Unknown value (?):

Example 8–3: Passing an INPUT parameter using the .NET OpenAPI

// Define and initialize the variable for the input parameter Int32 CustomerNumber = 33; // Create the ParamArray ParamArray parms = new ParamArray(1); // Add the input parameter to the ParamArray parms.AddInteger (0, CustomerNumber, ParamArrayMode.INPUT); // Run the procedure or user-defined function ...

Example 8–4 passes an INPUT integer parameter that supports the Unknown value (?):

Example 8–4: INPUT parameter as Unknown value (?) using .NET OpenAPI

// Define and initialize the variable for the input parameter Int32 CustomerNumber = 33; ... //Define and set the holder class for the input parameter //to null or an integer based on the variable value IntHolder hCustomerNumber = new IntHolder(); iCustomerNumber = new Integer(CustomerNumber) if (CustomerNumber > 33)    hCustomerNumber.Value = null; else    hCustomerNumber.Value = (Object) iCustomerNumber; // Create the ParamArray ParamArray parms = new ParamArray(1); // Add the input parameter to the ParamArray parms.AddInteger (0, hCustomerNumber, ParamArrayMode.INPUT); // Run the procedure or user-defined function ...