QuickOPC User's Guide and Reference
GetPropertyValueInt64(IEasyDAClient,ServerDescriptor,DANodeDescriptor,DAPropertyDescriptor) Method



OpcLabs.EasyOpcClassic Assembly > OpcLabs.EasyOpc.DataAccess.Extensions Namespace > IEasyDAClientExtension2 Class > GetPropertyValueInt64 Method : GetPropertyValueInt64(IEasyDAClient,ServerDescriptor,DANodeDescriptor,DAPropertyDescriptor) Method
The client object that will perform the operation.
The OPC server involved in the operation.
The descriptor of the OPC node involved in the operation.
The property descriptor of the OPC property being obtained.
Gets a value of OPC property, using descriptor object for the OPC server, and an OPC Item ID, and converts it to System.Int64.
Syntax
'Declaration
 
<ExtensionAttribute()>
Public Overloads Shared Function GetPropertyValueInt64( _
   ByVal client As IEasyDAClient, _
   ByVal serverDescriptor As ServerDescriptor, _
   ByVal nodeDescriptor As DANodeDescriptor, _
   ByVal propertyDescriptor As DAPropertyDescriptor _
) As Long
'Usage
 
Dim client As IEasyDAClient
Dim serverDescriptor As ServerDescriptor
Dim nodeDescriptor As DANodeDescriptor
Dim propertyDescriptor As DAPropertyDescriptor
Dim value As Long
 
value = IEasyDAClientExtension2.GetPropertyValueInt64(client, serverDescriptor, nodeDescriptor, propertyDescriptor)

Parameters

client
The client object that will perform the operation.
serverDescriptor
The OPC server involved in the operation.
nodeDescriptor
The descriptor of the OPC node involved in the operation.
propertyDescriptor
The property descriptor of the OPC property being obtained.

Return Value

If successful, the function returns the actual value of the OPC property requested, converted to a type indicated by the method name.
Exceptions
ExceptionDescription
Thrown when the OPC operation fails.
A null reference (Nothing in Visual Basic) is passed to a method that does not accept it as a valid argument.
Remarks
Using implicit conversions, you can pass an item ID in place of node descriptor.
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

IEasyDAClientExtension2 Class
IEasyDAClientExtension2 Members
Overload List