ConstructionEnabledAttribute Class
.NET Framework 2.0
Enables COM+ object construction support. This class cannot be inherited.
Namespace: System.EnterpriseServices
Assembly: System.EnterpriseServices (in system.enterpriseservices.dll)
Assembly: System.EnterpriseServices (in system.enterpriseservices.dll)
'Declaration <AttributeUsageAttribute(AttributeTargets.Class, Inherited:=True)> _ <ComVisibleAttribute(False)> _ Public NotInheritable Class ConstructionEnabledAttribute Inherits Attribute 'Usage Dim instance As ConstructionEnabledAttribute
/** @attribute AttributeUsageAttribute(AttributeTargets.Class, Inherited=true) */ /** @attribute ComVisibleAttribute(false) */ public final class ConstructionEnabledAttribute extends Attribute
AttributeUsageAttribute(AttributeTargets.Class, Inherited=true) ComVisibleAttribute(false) public final class ConstructionEnabledAttribute extends Attribute
For a list of initial property values for an instance of ConstructionEnabledAttribute, see the ConstructionEnabledAttribute constructor.
For more information about using attributes, see Extending Metadata Using Attributes.
The following code example demonstrates the use of this attribute to associate an object constructor string with a ServicedComponent class.
' Accept a constructor string. <ConstructionEnabled()> _ Public Class EmployeeInformation Inherits ServicedComponent ' The employee's user name and salary. Private accountName As String Private salary As Double = 0 ' Get the employee's name. All users can call this method. Public Function GetName() As String Return accountName End Function 'GetName ' Set the employee's salary. Only managers can do this. Public Sub SetSalary(ByVal ammount As Double) If SecurityCallContext.CurrentCall.IsCallerInRole("Manager") Then salary = ammount Else Throw New UnauthorizedAccessException() End If End Sub 'SetSalary ' Get the employee's salary. Only the employee and managers can do this. Public Function GetSalary() As Double If SecurityCallContext.CurrentCall.DirectCaller.AccountName = accountName OrElse SecurityCallContext.CurrentCall.IsCallerInRole("Manager") Then Return salary Else Throw New UnauthorizedAccessException() End If End Function 'GetSalary ' Use the constructor string. ' This method is called when the object is instantiated. Protected Overrides Sub Construct(ByVal constructorString As String) accountName = constructorString End Sub 'Construct End Class 'EmployeeInformation
// Accept a constructor string.
/** @attribute ConstructionEnabled()
*/
public class EmployeeInformation extends ServicedComponent
{
// The employee's user name and salary.
private String accountName;
private double salary = 0;
// Get the employee's name. All users can call this method.
public String GetName()
{
return accountName;
} //GetName
// Set the employee's salary. Only managers can do this.
public void SetSalary(double ammount)
throws System.UnauthorizedAccessException
{
if (SecurityCallContext.get_CurrentCall().IsCallerInRole("Manager")) {
salary = ammount;
}
else {
throw new UnauthorizedAccessException();
}
} //SetSalary
// Get the employee's salary. Only the employee and managers can do this.
public double GetSalary() throws System.UnauthorizedAccessException
{
if (SecurityCallContext.get_CurrentCall().get_DirectCaller().
get_AccountName().Equals(accountName)
|| SecurityCallContext.get_CurrentCall().
IsCallerInRole("Manager")) {
return salary;
}
else {
throw new UnauthorizedAccessException();
}
} //GetSalary
// Use the constructor string.
// This method is called when the object is instantiated.
protected void Construct(String constructorString)
{
accountName = constructorString;
} //Construct
} //EmployeeInformation
Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.
Community Additions
ADD
Show: