OPC Studio User's Guide and Reference
ReadValue Method (IEasyUAClientExtension)



OpcLabs.EasyOpcUA Assembly > OpcLabs.EasyOpc.UA Namespace > IEasyUAClientExtension Class : ReadValue Method
Reads an attribute from an OPC server. Only the attribute's value is returned (status code and timestamps are not returned).

The status code must be 'good' for this method to succeed; otherwise, a OpcLabs.EasyOpc.UA.OperationModel.UAException is thrown.

Overload List
OverloadDescription
Reads an attribute's value using an endpoint descriptor and a node Id.  
Reads an attribute's value using an endpoint descriptor, node Id and attribute Id.  
Reads a value of Value attribute of a node, node Id and an index range list.  
Reads an attribute's value using an endpoint descriptor, a node Id, and a read parameters object.  
Reads a value of Value attribute of a node, using an object that holds the node information.  
Reads a value of a specified attribute of a node, using an object that holds the node information, and an attribute Id.  
Reads a value of a specified attribute of a node, using an object that holds the node information, and an index range list.  
Reads a value of Value attribute of a node, using an object that holds the node information, and a read parameters object.  
Reads an attribute's value using an object that holds all necessary arguments.  
Requirements

Target Platforms: .NET Framework: Windows 10 (selected versions), Windows 11 (selected versions), Windows Server 2016, Windows Server 2022; .NET: Linux, macOS, Microsoft Windows

See Also