The following tables list the members exposed by DAOpcItem.
Public Constructors
| Name | Description | |
|---|---|---|
 | DAOpcItem Constructor |
Public Properties
| Name | Description | |
|---|---|---|
 | Active | Determines Active state of the item when the item is added in the OPC DA server. |
| Alias | Optional alias for code internal references to this object. |
| Error | Indicates an error at AddItems in OPC DA server. |
| HandlerName | Optional definition of a method that handles callbacks for this item. In server callbacks this method is called instead of the callback event handler. The method must be defined in the OwnerForm object as private void xxx(DAItemValue val){} |
| ItemName | Fully qualified OPC Item ID in the OPC DA server. |
| ReqType | Determines the client requested data type in the AddItems server call. The server passes item values in Read calls and DataChange callbacks in this data type. |
| VisualControl | This optional definition binds this item to a Windows Control object. The control needs to be defined in the OwnerForm object. The item value is written to the specified property of the control. Only the value is assigned. Quality, Timestamp and error code are ignored. If there is also a handler method assigned for this item then both requested handlings are executed. The callback event handler, however is not called for items with an assigned control. |