Release 10.1A: OpenEdge Development:
.NET Open Clients

Using the Open Client .NET OpenAPI to Directly Access the AppServer

The Open Client .NET OpenAPI is a generic set of .NET classes that can be used instead of the generated .NET proxies produced by ProxyGen. Without proxies, you must do all of the setup work in your client code to an access application service on the AppServer. You must know the procedure names, including relative path information (for the equivalent Progress 4GL RUN statement), the number of parameters along with their type, and the return type for user-defined functions. When using the OpenAPI, there is no compile time checking so all function prototype error checking is done at runtime.

This chapter describes the .NET OpenAPI in the following sections:

Overview of .NET OpenAPI classes
Connecting to the AppServer
Running procedures and user-defined functions
Setting up parameters
Passing parameters
Handling returned values
Sample .NET OpenAPI code