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
)

Parameters

userKey
Type: System.Security.RightsManagement.ContentUser

The user of the UseLicense.

useLicense
Type: System.Security.RightsManagement.UseLicense

The use license to store and embed in the package.

ExceptionCondition
ArgumentNullException

Either the userKey or useLicense parameter is null.

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.

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;
}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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