Class ReadOnlyAttribute

Attribute allows to prevent writing to the members of twin connector.

ReadOnlyAttribute can be declared for member of a FB, GVL or STRUCT.

note

This attribute is typically defined in the declaration section of PLC block and then trans-piled by ixc builder.

warning

Use of ReadOnlyAttribute does not prevent the PLC program to write to the variable that declares this attribute.

This example demonstrates declaration of ReadOnlyAttribute on a member of a FB. 
FUNCTION_BLOCK fbSomeReadOnlyMembers 
    VAR
        {#ix-attr:[ReadOnly()]]}
        _nonWrittableItem : BOOL;       // Member is readonly for .net application.
        {#ix-attr:[ReadOnly()]]}
        _nonWrittableFunctionBlock : fbNonWrittable; // Member and its members are readonly for the .net application.
    END_VAR
Inheritance
object
Attribute
ReadOnlyAttribute
Inherited Members
Namespace: AXSharp.Connector
Assembly: AXSharp.Connector.dll
Syntax
[AttributeUsage(AttributeTargets.Property|AttributeTargets.Field)]
public class ReadOnlyAttribute : Attribute

Constructors

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ReadOnlyAttribute()

Creates new instance of ReadOnlyAttribute

Declaration
public ReadOnlyAttribute()