| Overload | Description |
|---|---|
| SubscribeItem(IEasyDAClient,EasyDAItemSubscriptionArguments) | Subscribe to changes of a particular OPC item. The ItemChanged event is generated for each significant item change.Subscribe to OPC item using an object that holds all necessary arguments, including an optional callback. |
| SubscribeItem(IEasyDAClient,DAItemGroupArguments) | Subscribe to changes of a particular OPC item. The ItemChanged event is generated for each significant item change.Subscribe to OPC item using an object that holds all necessary arguments. |
| SubscribeItem(IEasyDAClient,DAItemGroupArguments,EasyDAItemChangedEventHandler) | Subscribe to changes of a particular OPC item. The ItemChanged event is generated for each significant item change.Subscribe to OPC item using an object that holds all necessary arguments, and an optional callback. |
| SubscribeItem(IEasyDAClient,ServerDescriptor,DAItemDescriptor,DAGroupParameters,EasyDAItemChangedEventHandler,Object) | Subscribe to changes of a particular OPC item. The ItemChanged event is generated for each significant item change.Subscribe to OPC item. Specify server and item descriptors, group parameters object, callback method, and a user-defined state object. |
| SubscribeItem(IEasyDAClient,ServerDescriptor,DAItemDescriptor,DAGroupParameters,Object) | Subscribe to changes of a particular OPC item. The ItemChanged event is generated for each significant item change.Subscribe to OPC item. Specify server and item descriptors, and group parameters object. |
| SubscribeItem(IEasyDAClient,String,String,String,VarType,Int32,Single,EasyDAItemChangedEventHandler,Object) | Subscribe to changes of a particular OPC item. The ItemChanged event is generated for each significant item change.Subscribe to OPC item. Specify machine name, server class, item ID, data type, requested update rate, percent deadband, callback method, and a user-defined state object. |
| SubscribeItem(IEasyDAClient,String,String,String,VarType,Int32,Single,Object) | Subscribe to changes of a particular OPC item. The ItemChanged event is generated for each significant item change.Subscribe to OPC item. Specify machine name, server class, item ID, data type, requested update rate, and percent deadband. |
| SubscribeItem(IEasyDAClient,String,String,String,VarType,Int32,EasyDAItemChangedEventHandler,Object) | Subscribe to changes of a particular OPC item. The ItemChanged event is generated for each significant item change.Subscribe to OPC item. Specify machine name, server class, item ID, data type, requested update rate, callback method, and a user-supplied state object. |
| SubscribeItem(IEasyDAClient,String,String,String,VarType,Int32,Object) | Subscribe to changes of a particular OPC item. The ItemChanged event is generated for each significant item change.Subscribe to OPC item. Specify machine name, server class, item ID, data type, and requested update rate. |
| SubscribeItem(IEasyDAClient,String,String,String,Int32,EasyDAItemChangedEventHandler,Object) | Subscribe to changes of a particular OPC item. The ItemChanged event is generated for each significant item change.Subscribe to OPC item. Specify machine name, server class, item ID, requested update rate, callback method, and and a state object. |
| SubscribeItem(IEasyDAClient,String,String,String,Int32,EasyDAItemChangedEventHandler) | Subscribe to changes of a particular OPC item. The ItemChanged event is generated for each significant item change.Subscribe to OPC item. Specify machine name, server class, item ID, requested update rate, and a callback method. |
| SubscribeItem(IEasyDAClient,String,String,String,Int32,Object) | Subscribe to changes of a particular OPC item. The ItemChanged event is generated for each significant item change.Subscribe to OPC item. Specify machine name, server class, item ID, requested update rate, and a state object. |
| SubscribeItem(IEasyDAClient,String,String,String,Int32) | Subscribe to changes of a particular OPC item. The ItemChanged event is generated for each significant item change.Subscribe to OPC item. Specify machine name, server class, item ID, and requested update rate. No state object is specified (this overload is suitable for simple scenarios only). |
QuickOPC User's Guide and Reference
SubscribeItem Method (IEasyDAClientExtension)