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LicenseManager Class

Provides properties and methods to add a license to a component and to manage a LicenseProvider. This class cannot be inherited.

System.Object
  System.ComponentModel.LicenseManager

Namespace:  System.ComponentModel
Assembly:  System (in System.dll)

[HostProtectionAttribute(SecurityAction.LinkDemand, ExternalProcessMgmt = true)]
public sealed class LicenseManager

The LicenseManager type exposes the following members.

  NameDescription
Public propertyStatic memberCurrentContextGets or sets the current LicenseContext, which specifies when you can use the licensed object.
Public propertyStatic memberUsageModeGets the LicenseUsageMode which specifies when you can use the licensed object for the CurrentContext.
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  NameDescription
Public methodStatic memberCreateWithContext(Type, LicenseContext)Creates an instance of the specified type, given a context in which you can use the licensed instance.
Public methodStatic memberCreateWithContext(Type, LicenseContext, Object[])Creates an instance of the specified type with the specified arguments, given a context in which you can use the licensed instance.
Public methodEquals(Object)Determines whether the specified object is equal to the current object. (Inherited from Object.)
Public methodGetHashCodeServes as the default hash function. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodStatic memberIsLicensedReturns whether the given type has a valid license.
Public methodStatic memberIsValid(Type)Determines whether a valid license can be granted for the specified type.
Public methodStatic memberIsValid(Type, Object, License)Determines whether a valid license can be granted for the specified instance of the type. This method creates a valid License.
Public methodStatic memberLockContextPrevents changes being made to the current LicenseContext of the given object.
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
Public methodStatic memberUnlockContextAllows changes to be made to the current LicenseContext of the given object.
Public methodStatic memberValidate(Type)Determines whether a license can be granted for the specified type.
Public methodStatic memberValidate(Type, Object)Determines whether a license can be granted for the instance of the specified type.
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The LicenseManager class provides the following static properties: CurrentContext and UsageMode. The class also provides the following static methods: CreateWithContext, IsValid, and Validate.

When you create a component that you want to license, you must do the following:

  1. Specify the LicenseProvider by marking the component with a LicenseProviderAttribute.

  2. Call Validate or IsValid in the constructor of the component. Validate throws a LicenseException when it tries to create an instance without a valid license. IsValid does not throw an exception.

  3. Call Dispose on any license that is granted when the component is disposed or finalized.

For more information on licensing, see How to: License Components and Controls.

NoteNote

The HostProtectionAttribute attribute applied to this type or member has the following Resources property value: ExternalProcessMgmt. The HostProtectionAttribute does not affect desktop applications (which are typically started by double-clicking an icon, typing a command, or entering a URL in a browser). For more information, see the HostProtectionAttribute class or SQL Server Programming and Host Protection Attributes.

The following code example creates a licensed control using the Validate method. It uses a LicenseProvider that is implemented by the LicFileLicenseProvider class.

using System;
using System.ComponentModel;
using System.Windows.Forms;


// Adds the LicenseProviderAttribute to the control.
[LicenseProvider(typeof(LicFileLicenseProvider))]
public class MyControl : Control 
{

   // Creates a new, null license. 
   private License license = null;

   public MyControl () 
   {

      // Adds Validate to the control's constructor.
      license = LicenseManager.Validate(typeof(MyControl), this);

      // Insert code to perform other instance creation tasks here.
   }

   protected override void Dispose(bool disposing) 
   {
      if(disposing)
      {
         if (license != null) 
         {
            license.Dispose();
            license = null;
         }
      }
   }

}

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
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