Class ReadOnlyAttribute

Attribute allows to prevent writing to the members of Vortex 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 Vortex.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
        {attribute clr [ReadOnly()]]}
        _nonWrittableItem : BOOL;       // Member is readonly for .net application.
        {attribute clr [ReadOnly()]]}
        _nonWrittableFunctionBlock : fbNonWrittable; // Member and its members are readonly for the .net application.
    END_VAR

Inheritance

System.Object

System.Attribute

ReadOnlyAttribute

Inherited Members

System.Attribute.Equals(System.Object)

System.Attribute.GetCustomAttribute(System.Reflection.Assembly, System.Type)

System.Attribute.GetCustomAttribute(System.Reflection.Assembly, System.Type, System.Boolean)

System.Attribute.GetCustomAttribute(System.Reflection.MemberInfo, System.Type)

System.Attribute.GetCustomAttribute(System.Reflection.MemberInfo, System.Type, System.Boolean)

System.Attribute.GetCustomAttribute(System.Reflection.Module, System.Type)

System.Attribute.GetCustomAttribute(System.Reflection.Module, System.Type, System.Boolean)

System.Attribute.GetCustomAttribute(System.Reflection.ParameterInfo, System.Type)

System.Attribute.GetCustomAttribute(System.Reflection.ParameterInfo, System.Type, System.Boolean)

System.Attribute.GetCustomAttributes(System.Reflection.Assembly)

System.Attribute.GetCustomAttributes(System.Reflection.Assembly, System.Boolean)

System.Attribute.GetCustomAttributes(System.Reflection.Assembly, System.Type)

System.Attribute.GetCustomAttributes(System.Reflection.Assembly, System.Type, System.Boolean)

System.Attribute.GetCustomAttributes(System.Reflection.MemberInfo)

System.Attribute.GetCustomAttributes(System.Reflection.MemberInfo, System.Boolean)

System.Attribute.GetCustomAttributes(System.Reflection.MemberInfo, System.Type)

System.Attribute.GetCustomAttributes(System.Reflection.MemberInfo, System.Type, System.Boolean)

System.Attribute.GetCustomAttributes(System.Reflection.Module)

System.Attribute.GetCustomAttributes(System.Reflection.Module, System.Boolean)

System.Attribute.GetCustomAttributes(System.Reflection.Module, System.Type)

System.Attribute.GetCustomAttributes(System.Reflection.Module, System.Type, System.Boolean)

System.Attribute.GetCustomAttributes(System.Reflection.ParameterInfo)

System.Attribute.GetCustomAttributes(System.Reflection.ParameterInfo, System.Boolean)

System.Attribute.GetCustomAttributes(System.Reflection.ParameterInfo, System.Type)

System.Attribute.GetCustomAttributes(System.Reflection.ParameterInfo, System.Type, System.Boolean)

System.Attribute.GetHashCode()

System.Attribute.IsDefaultAttribute()

System.Attribute.IsDefined(System.Reflection.Assembly, System.Type)

System.Attribute.IsDefined(System.Reflection.Assembly, System.Type, System.Boolean)

System.Attribute.IsDefined(System.Reflection.MemberInfo, System.Type)

System.Attribute.IsDefined(System.Reflection.MemberInfo, System.Type, System.Boolean)

System.Attribute.IsDefined(System.Reflection.Module, System.Type)

System.Attribute.IsDefined(System.Reflection.Module, System.Type, System.Boolean)

System.Attribute.IsDefined(System.Reflection.ParameterInfo, System.Type)

System.Attribute.IsDefined(System.Reflection.ParameterInfo, System.Type, System.Boolean)

System.Attribute.Match(System.Object)

System.Attribute.TypeId

Namespace: Vortex.Connector.Attributes

Assembly: Vortex.Connector.dll

Syntax

[AttributeUsage(AttributeTargets.Property)]
public class ReadOnlyAttribute : Attribute

Constructors

ReadOnlyAttribute()

Creates new instance of ReadOnlyAttribute

Declaration

public ReadOnlyAttribute()

Extension Methods

IValueTagExtensions.Cast<T>(T, Object)