Attribute Constructor

protected:
 Attribute();

protected Attribute();

Protected Sub New ()

Voorbeelden

In het volgende codevoorbeeld ziet u de definitie van een aangepaste parameterklasse Attribute met de bijbehorende constructor.

// Define a custom parameter attribute that takes a single message argument.
[AttributeUsage( AttributeTargets.Parameter )]
public class ArgumentUsageAttribute : Attribute
{
    // This is the attribute constructor.
    public ArgumentUsageAttribute( string UsageMsg )
    {
        this.usageMsg = UsageMsg;
    }

    // usageMsg is storage for the attribute message.
    protected string usageMsg;

    // This is the Message property for the attribute.
    public string Message
    {
        get { return usageMsg; }
        set { usageMsg = value; }
    }
}

' Define a custom parameter attribute that takes a single message argument.
<AttributeUsage(AttributeTargets.Parameter)>  _
Public Class ArgumentUsageAttribute
    Inherits Attribute
       
    ' This is the attribute constructor.
    Public Sub New(UsageMsg As String)
        Me.usageMsg = UsageMsg
    End Sub

    ' usageMsg is storage for the attribute message.
    Protected usageMsg As String
       
    ' This is the Message property for the attribute.
    Public Property Message() As String
        Get
            Return usageMsg
        End Get
        Set
            usageMsg = value
        End Set
    End Property
End Class

Opmerkingen

Deze constructor wordt alleen aangeroepen door klassen die zijn afgeleid van Attribute.