| Overload | Description | 
|---|---|
| DAClientItemSource Constructor(ServerDescriptor,DAItemDescriptor) | Initializes a new instance of the class, with given OPC server and item descriptors. | 
| DAClientItemSource Constructor(ServerDescriptor,DAItemDescriptor,DAGroupParameters) | Initializes a new instance of the class, with given OPC server and item descriptors, and subscription (OPC group) parameters. | 
| DAClientItemSource Constructor(ServerDescriptor,DAItemDescriptor,DAReadParameters) | Initializes a new instance of the class, with given OPC server and item descriptors, and read parameters. | 
| DAClientItemSource Constructor(ServerDescriptor,DAItemDescriptor,DAGroupParameters,DAReadParameters) | Initializes a new instance of the class, with given OPC server and item descriptors, subscription (OPC group) and read parameters. |