OPC Studio User's Guide and Reference
Prefix Property (_ObjectDescriptor)



OpcLabs.BaseLib Assembly > OpcLabs.BaseLib.ComTypes Namespace > _ObjectDescriptor Interface : Prefix Property
A scheme name followed by a colon. An empty string if there is no scheme.
Syntax
'Declaration
 
<NotNullAttribute()>
Property Prefix As String
'Usage
 
Dim instance As _ObjectDescriptor
Dim value As String
 
instance.Prefix = value
 
value = instance.Prefix
[NotNull()]
string Prefix {get; set;}
[NotNull()]
property String^ Prefix {
   String^ get();
   void set (    String^ value);
}

Property Value

This value of this property can be null (Nothing in Visual Basic).

The value of this property cannot be null (Nothing in Visual Basic).

Exceptions
ExceptionDescription

One of the arguments provided to a method is not valid.

This is a usage error, i.e. it will never occur (the exception will not be thrown) in a correctly written program. Your code should not catch this exception.

A null reference (Nothing in Visual Basic) is passed to a method that does not accept it as a valid argument.

This is a usage error, i.e. it will never occur (the exception will not be thrown) in a correctly written program. Your code should not catch this exception.

Remarks

The getter method of this property is pure, i.e. it does not have observable side effects.

This member or type is for use from COM. It is not meant to be used from .NET or Python. Refer to the corresponding .NET member or type instead, if you are developing in .NET or Python.

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