OPC Studio User's Guide and Reference
ToVarTypes Method



OpcLabs.BaseLib Assembly > OpcLabs.BaseLib.ComInterop Namespace > VarType Class : ToVarTypes Method
VarType object to be converted.

Because the VarType has an implicit conversion from System.Int32 and VarTypes, in languages that support implicit conversion operators (such as C# or VB.NET), you can simply use an integer (representing the numerical value of the COM VARTYPE), or an element of the VarTypes enumeration (or an allowed combination of VarTypes flags) in place of this parameter, and the corresponding data type specification will be constructed automatically. When the implicit conversion operators are not supported (such as with Python.NET), you can use the VarType Constructor(Int32) or VarType Constructor(VarTypes) constructor instead.

The value of this parameter can be null (Nothing in Visual Basic).

Converts VarType object to an enumerated value.
Syntax
'Declaration
 
Public Shared Function ToVarTypes( _
   ByVal varType As VarType _
) As VarTypes
'Usage
 
Dim varType As VarType
Dim value As VarTypes
 
value = VarType.ToVarTypes(varType)
public static VarTypes ToVarTypes( 
   VarType varType
)
public:
static VarTypes ToVarTypes( 
   VarType^ varType
) 

Parameters

varType
VarType object to be converted.

Because the VarType has an implicit conversion from System.Int32 and VarTypes, in languages that support implicit conversion operators (such as C# or VB.NET), you can simply use an integer (representing the numerical value of the COM VARTYPE), or an element of the VarTypes enumeration (or an allowed combination of VarTypes flags) in place of this parameter, and the corresponding data type specification will be constructed automatically. When the implicit conversion operators are not supported (such as with Python.NET), you can use the VarType Constructor(Int32) or VarType Constructor(VarTypes) constructor instead.

The value of this parameter can be null (Nothing in Visual Basic).

Return Value

Returns an enumerated value converted from the input argument.
Remarks

In languages that support implicit conversions (such as C# or VB.NET), in many cases you do not have call this method explicitly. When indicated, a call to an available equivalent implicit conversion operator will be created by the compiler automatically.

This method or property does not throw any exceptions, aside from execution exceptions such as System.Threading.ThreadAbortException or System.OutOfMemoryException.

Requirements

Target Platforms: .NET Framework: Windows 10 (selected versions), Windows 11 (selected versions), Windows Server 2016, Windows Server 2022; .NET: Linux, macOS, Microsoft Windows

See Also