The following tables list the members exposed by RefreshGroup.
Public Constructors
| Name | Description | |
|---|---|---|
 | RefreshGroup Constructor | Overloaded. |
Public Fields
| Name | Description | |
|---|---|---|
 | iClientHandle | (Inherited from OPCDA.NET.SyncIOGroup) |
Public Properties
| Name | Description | |
|---|---|---|
 | ClientHandle | Group client handle (Inherited from OPCDA.NET.SyncIOGroup) |
| OpcGrp | Associated OPC group object (Inherited from OPCDA.NET.SyncIOGroup) |
| UpdateRate | Update rate definition. This is the fasted rate of callbacks form the OPC server A get is from the OpcGroup property. To force a read of the update rate from the OPC server, the method RefrGrp.OpcGrp.GetStat() has to be called to refresh the cache. On set the OPC server is updated. The server may set a revised value. The actually set UpdateRate can be checked by reading this property. |
Public Methods
| Name | Description | |
|---|---|---|
 | Add | Overloaded. Add an item to the group. The item is also added to the associated OPC group and the item characteristics are stored in the ItemDef object OPCIIinfo This method is provided for the handling of special sitution and is not used in most applications. The read/write function call it internally if the item is not yet added. (Inherited from OPCDA.NET.SyncIOGroup) |
| Dispose | Removes the OPC group and releases the internal item collection (Inherited from OPCDA.NET.SyncIOGroup) |
| FindClientHandle | Return the item object for the item with the specified client handle. The method is typically used in the data changed callback handler. (Inherited from OPCDA.NET.SyncIOGroup) |
| GetErrorString | Get the error text from the OPC server. ( IOPCServer::GetErrorString ) This method is added for user convenience. (Inherited from OPCDA.NET.SyncIOGroup) |
| GetItemsInGroup | Get the information about the items in the group. (Inherited from OPCDA.NET.SyncIOGroup) |
| GetQualityString | Convert the OPC item quality code into a text string. The codes is defined in the enumerator OPC_QUALITY_STATUS. (Inherited from OPCDA.NET.SyncIOGroup) |
| Item | Return the item object for the item with the specified name. The name must be full path name. (Inherited from OPCDA.NET.SyncIOGroup) |
| Read | Overloaded. Read the current value of one item. An asynchronous OpcGroup read call is executed. The value is returned in the ReadComplete callback handler. This simplified Read overload does not return a cancel ID and therefore does not allow the call to be cancelled. |
| Remove | Remove one item from the SyncIOGroup object. The item is also removed from the associated OPC group. (Inherited from OPCDA.NET.SyncIOGroup) |
| Write | Overloaded. Write a new value to the specified item. An asynchronous OPC write call is executed. The WriteComplete callback returns the indication of the successful execution or error information if the write failed. This simplified Write method overload does not return a cancel ID and therefore does not allow the call to be cancelled. |
