LicenseException Class
Represents the exception thrown when a component cannot be granted a license.
For a list of all members of this type, see LicenseException Members.
System.Object
System.Exception
System.SystemException
System.ComponentModel.LicenseException
[Visual Basic] Public Class LicenseException Inherits SystemException [C#] public class LicenseException : SystemException [C++] public __gc class LicenseException : public SystemException [JScript] public class LicenseException extends SystemException
Thread Safety
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
Remarks
The LicenseManager.Validate method throws LicenseException when a component cannot obtain a valid license. This occurs when a component is either not licensed, or is licensed, but cannot be granted a valid license.
For more information on licensing, see Licensing Components and Controls.
Example
[Visual Basic, C#, C++] The following example shows how to catch a LicenseException and interpret its content. In the sample, the application calls the Validate method for a System.Windows.Forms.Form, which is not licensed. Upon catching the exception, the sample fetches the respective error message, the type of component that was not granted a license, the stack trace, and the origin of the exception.
[Visual Basic, C#, C++] This example assumes that you have specified the LicenseProvider by marking the System.Windows.Forms.Form with a LicenseProviderAttribute attribute. For more information on how to do this, see the LicenseManager class.
[Visual Basic] Try Dim licTest As License licTest = LicenseManager.Validate(GetType(Form1), Me) Catch licE As LicenseException Console.WriteLine(licE.Message) Console.WriteLine(licE.LicensedType) Console.WriteLine(licE.StackTrace) Console.WriteLine(licE.Source) End Try [C#] try { License licTest = null; licTest = LicenseManager.Validate(typeof(Form1), this); } catch(LicenseException licE) { Console.WriteLine(licE.Message); Console.WriteLine(licE.LicensedType); Console.WriteLine(licE.StackTrace); Console.WriteLine(licE.Source); } [C++] try { License* licTest = 0; licTest = LicenseManager::Validate(__typeof(Form1), this); } catch(LicenseException* licE) { Console::WriteLine(licE->Message); Console::WriteLine(licE->LicensedType); Console::WriteLine(licE->StackTrace); Console::WriteLine(licE->Source); }
[JScript] No example is available for JScript. To view a Visual Basic, C#, or C++ example, click the Language Filter button
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Requirements
Namespace: System.ComponentModel
Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family
Assembly: System (in System.dll)
See Also
LicenseException Members | System.ComponentModel Namespace | License | LicenseContext | LicenseManager | LicenseProvider | LicenseProviderAttribute | LicFileLicenseProvider | LicenseUsageMode