QuickOPC User's Guide and Reference
DAItemGroupArguments Constructor(String,String,String,VarType,Int32,Object)



OpcLabs.EasyOpcClassic Assembly > OpcLabs.EasyOpc.DataAccess.OperationModel Namespace > DAItemGroupArguments Class > DAItemGroupArguments Constructor : DAItemGroupArguments Constructor(String,String,String,VarType,Int32,Object)
Name of the machine. Determines the computer on which the OPC server is located. May be an empty string, in which case the OPC server is assumed to exist on the local computer or at the computer specified for it by DCOM configuration.
Contains ProgID of the OPC server.
Contains OPC item identifier.
Specifies the data type requested. Passing OpcLabs.BaseLib.ComInterop.VarTypes.Empty means that the server's canonical data type should be used.
How often should the updates be received (number of milliseconds).
The state object (can be any value supplied by your code); available in event notifications.
Initializes a new instance of the class. Initializes a new instance of the class, with the OPC server specified by machine name and server class, the OPC item specified by its ItemId and data type, the OPC group parameters specified by requested update rate, and with a user-defined state object.
Syntax
'Declaration
 
Public Function New( _
   ByVal machineName As String, _
   ByVal serverClass As String, _
   ByVal itemId As String, _
   ByVal dataType As VarType, _
   ByVal requestedUpdateRate As Integer, _
   ByVal state As Object _
)
'Usage
 
Dim machineName As String
Dim serverClass As String
Dim itemId As String
Dim dataType As VarType
Dim requestedUpdateRate As Integer
Dim state As Object
 
Dim instance As New DAItemGroupArguments(machineName, serverClass, itemId, dataType, requestedUpdateRate, state)

Parameters

machineName
Name of the machine. Determines the computer on which the OPC server is located. May be an empty string, in which case the OPC server is assumed to exist on the local computer or at the computer specified for it by DCOM configuration.
serverClass
Contains ProgID of the OPC server.
itemId
Contains OPC item identifier.
dataType
Specifies the data type requested. Passing OpcLabs.BaseLib.ComInterop.VarTypes.Empty means that the server's canonical data type should be used.
requestedUpdateRate
How often should the updates be received (number of milliseconds).
state
The state object (can be any value supplied by your code); available in event notifications.
Requirements

Target Platforms: .NET Framework: Windows 10 (selected versions), Windows 11 (selected versions), Windows Server 2012, Windows Server 2016; .NET Core, .NET 5, .NET 6: Linux, macOS, Microsoft Windows

See Also

Reference

DAItemGroupArguments Class
DAItemGroupArguments Members
Overload List