ReadOnlyAttribute(Boolean) Constructor

Reference

Definition

Namespace:: System.ComponentModel

Assemblies:: netstandard.dll, System.ComponentModel.Primitives.dll

Assembly:: System.ComponentModel.Primitives.dll

Assembly:: System.dll

Assembly:: netstandard.dll

Source:: ReadOnlyAttribute.cs

Source:: ReadOnlyAttribute.cs

Source:: ReadOnlyAttribute.cs

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Initializes a new instance of the ReadOnlyAttribute class.

public:
 ReadOnlyAttribute(bool isReadOnly);

public ReadOnlyAttribute(bool isReadOnly);

new System.ComponentModel.ReadOnlyAttribute : bool -> System.ComponentModel.ReadOnlyAttribute

Public Sub New (isReadOnly As Boolean)

Parameters

isReadOnly: Boolean

true to show that the property this attribute is bound to is read-only; false to show that the property is read/write.

Examples

The following code example marks a property as read-only. This code creates a new ReadOnlyAttribute, sets its value to ReadOnlyAttribute.Yes, and binds it to the property.

public:
   [ReadOnly(true)]
   property int MyProperty 
   {
      int get()
      {
         // Insert code here.
         return 0;
      }
      void set( int value )
      {
         // Insert code here.
      }
   }

[ReadOnly(true)]
public int MyProperty {
   get {
      // Insert code here.
      return 0;
   }
   set {
      // Insert code here.
   }
}

<ReadOnlyAttribute(True)> _
Public Property MyProperty() As Integer
    Get
        ' Insert code here.
        Return 0
    End Get
    Set
        ' Insert code here.
    End Set
End Property

Remarks

Members that are marked with the ReadOnlyAttribute set to true or that do not have a Set method cannot be changed. Members that do not have this attribute or that are marked with the ReadOnlyAttribute set to false are read/write, and they can be changed. The default is No.

Note

When you mark a property with the ReadOnlyAttribute set to true, the value of this attribute is set to the constant member Yes. For a property marked with the ReadOnlyAttribute set to false, the value is No. Therefore, when you want to check the value of this attribute in your code, you must specify the attribute as ReadOnlyAttribute.Yes or ReadOnlyAttribute.No.

Applies to

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	2.0, 2.1

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