Licensing and Subscription

Sometimes, in order to study the system better, you want to dive into the code as fast as possible. To make this easier, GroupDocs.Viewer provides different plans for purchase or offers a Free Trial and a 30-day Temporary License for evaluation.

Free Trial or Temporary License

You can try GroupDocs.Viewer without buying a license.

Free Trial

The evaluation version is the same as the purchased one – the evaluation version simply becomes licensed when you set the license. You can set the license in a number of ways that described in the next sections of this article.

The evaluation version comes with the limitations:

  • Only first 2 pages can be rendered.
  • Trial badges are placed in the rendering results on the top of each page.

Temporary License

If you wish to test GroupDocs.Viewer without the limitations of the trial version, you can also request a 30-day Temporary License. For more details, see the “Get a Temporary License” page.

How to set a license

After the license is obtained you need to set the license. This section describes options of how this can be done, and also comments on some common questions.

The license should be set:

  • Only once per application domain,
  • and before using any other GroupDocs.Viewer classes.

Set License from File

The following code sets a license from file.

string licensePath = "path to the .lic file";
License license = new License();
license.SetLicense(licensePath);

Set License from Stream

The following example shows how to set a license from a stream.

string licensePath = "path to the .lic file";
using (FileStream fileStream = File.OpenRead(licensePath))
{
    License license = new License();
    license.SetLicense(fileStream);
}

Set Metered License

You can also set Metered license as an alternative to license file. It is a new licensing mechanism that will be used along with existing licensing method. It is useful for the customers who want to be billed based on the usage of the API features. For more details, please refer to Metered Licensing FAQ section.

Following is the sample code demonstrating how to use Metered licensing.

string publicKey = ""; // Your public license key
string privateKey = ""; // Your private license key

Metered metered = new Metered();
metered.SetMeteredKey(publicKey, privateKey);

// Get amount (MB) consumed
decimal amountConsumed = GroupDocs.Viewer.Metered.GetConsumptionQuantity();
Console.WriteLine("Amount (MB) consumed: " + amountConsumed);

// Get count of credits consumed
decimal creditsConsumed = GroupDocs.Viewer.Metered.GetConsumptionCredit();
Console.WriteLine("Credits consumed: " + creditsConsumed);