The OPC Classic Client Solutions offers a fast and easy access to the OPC Classic Client technology. Develop OPC DA, OPC AE and OPC HDA compliant Clients with C# targeting
- .NET 10.0, .NET 9.0, .NET 8.0,
- .NET 4.8,
- .NET 4.7.2
support.
The OPC Classic Client Solution .NET API defines classes which can be used to implement an OPC client capable to access OPC servers supporting different specifications with the same API. These classes manage client side state information; provide higher level abstractions for OPC tasks such as managing sessions and subscriptions or saving and restoring connection information for later use. The lower level API’s for OPC DA, OPC AE and OPC HDA defines classes which can be used to access OPC specification specific methods and properties.
OPC DA/AE/HDA uses (D)COM technology from Windows. Therefore only Windows is supported.
The documentation is available here.
Examples can be found in the solution OpcDaAeHdaClientSolution.sln.
TECHNOSOFTWARE provides different licenses depending on the component and on the ownership of a purchased license of the user of the sources. A single ZIP file or a single repository can contain multiple components where the sources have different license models. The valid license is in the header of each source file.
See LICENSE.md for more details.
The OPC Classic Client Solutions One-time fee for lifetime SCLA 1.0 license is available at
We do not offer guaranteed, contractual, or paid support options. Our team provides assistance to all customers to the best of our abilities, including those who have not yet completed a purchase. Support is generally available for the current version of the software.
Technosoftware has no plans to add features and fixes will only be done if time allows it.
Therefore we strongly encourage community participation and contribution to this project. First, please fork the repository and commit your changes there. Once happy with your changes you can generate a 'pull request'.
You must agree to the contributor license agreement before we can accept your changes. The CLA and "I AGREE" button is automatically displayed when you perform the pull request. You can preview CLA here.