Attribute Constructor
Definition
Important
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Initializes a new instance of the Attribute class.
protected:
Attribute();
protected Attribute ();
Protected Sub New ()
Examples
The following code example shows the definition of a custom parameter Attribute class with its constructor.
// Define a custom parameter attribute that takes a single message argument.
[AttributeUsage(AttributeTargets::Parameter)]
public ref class ArgumentUsageAttribute: public Attribute
{
protected:
// usageMsg is storage for the attribute message.
String^ usageMsg;
public:
// This is the attribute constructor.
ArgumentUsageAttribute( String^ UsageMsg )
{
this->usageMsg = UsageMsg;
}
property String^ Message
{
// This is the Message property for the attribute.
String^ get()
{
return usageMsg;
}
void set( String^ value )
{
this->usageMsg = value;
}
}
};
// 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); AllowNullLiteral>]
type ArgumentUsageAttribute(usageMsg) =
inherit Attribute()
// This is the Message property for the attribute.
member val Message = usageMsg with get, set
' 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
Remarks
This constructor is only called by classes that derive from Attribute.
Applies to
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