RightsManagementInformation.SaveUseLicense Method

Saves a given UseLicense for a specified user to the encrypted rights management data stream.

Namespace: System.IO.Packaging
Assembly: WindowsBase (in windowsbase.dll)

public void SaveUseLicense (
	ContentUser userKey,
	UseLicense useLicense
)
public void SaveUseLicense (
	ContentUser userKey, 
	UseLicense useLicense
)
public function SaveUseLicense (
	userKey : ContentUser, 
	useLicense : UseLicense
)
You cannot use methods in XAML.

Parameters

userKey

The user of the UseLicense.

useLicense

The use license to store and embed in the package.

Exception typeCondition

ArgumentNullException

Either the userKey or useLicense parameter is a null reference (Nothing in Visual Basic).

FileFormatException

The rights management information in this package cannot be read by the current version of this class.

After the UseLicense for the specified user has been saved, it can be retrieved through the LoadUseLicense method and from the collection returned by GetEmbeddedUseLicenses.

A Package can store the UseLicense rights information for multiple content users. Each ContentUser can have at most one UseLicense. If SaveUseLicense is called to store a new UseLicense for a ContentUser that already has a UseLicense, the previous license will be overwritten with the new license.

The following example shows how to use of the SaveUseLicense method. For the full sample, see Rights Managed Package Publish Sample.

WriteStatus("   Signing the UnsignedPublishLicense\n" +
            "       to build the PublishLicense.");
UseLicense authorsUseLicense;
PublishLicense publishLicense =
    unsignedLicense.Sign(_secureEnv, out authorsUseLicense);

WriteStatus("   Binding the author's UseLicense and");
WriteStatus("       obtaining the CryptoProvider.");
CryptoProvider cryptoProvider = authorsUseLicense.Bind(_secureEnv);

WriteStatus("   Creating the EncryptedPackage.");
Stream packageStream = File.OpenRead(packageFile);
EncryptedPackageEnvelope ePackage =
    EncryptedPackageEnvelope.CreateFromPackage(encryptedFile,
        packageStream, publishLicense, cryptoProvider);

WriteStatus("   Adding an author's UseLicense.");
RightsManagementInformation rmi =
    ePackage.RightsManagementInformation;
rmi.SaveUseLicense(author, authorsUseLicense);

ePackage.Close();
WriteStatus("   Done - Package encryption complete.");

WriteStatus("Verifying package encryption.");
if (EncryptedPackageEnvelope.IsEncryptedPackageEnvelope(encryptedFile))
{
    WriteStatus("   Confirmed - '" + encryptedFilename +
                "' is encrypted.");
}
else
{
    MessageBox.Show("ERROR: '" + encryptedFilename +
        "' is NOT ENCRYPTED.", "Encryption Error",
        MessageBoxButton.OK, MessageBoxImage.Error);
    WriteStatus("ERROR: '" + encryptedFilename +
                "' is NOT ENCRYPTED.\n");
    return false;
}

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0

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