You can easily download GroupDocs.Watermark for evaluation. The evaluation download is the same as the purchased download. The evaluation version simply becomes licensed when you add a few lines of code to apply the license. You will face following limitations while using the API without the license.
|Document loading||Only 10 documents can be loaded per application run.|
|Watermark search/removing||Removing/replacing of document parts is not allowed in evaluation mode.|
|Watermark adding||Only 1 watermark can be added to a document per editing session.|
|Document saving||Evaluation warning watermark will be added to a document.|
The license file contains details such as the product name, number of developers it is licensed to, subscription expiry date and so on. It contains the digital signature, so don't modify the file. Even inadvertent addition of an extra line break into the file will invalidate it. You need to set a license before utilizing GroupDocs.Watermark API if you want to avoid its evaluation limitations.
The license can be loaded from a file or stream object. The easiest way to set a license is to put the license file in the same folder as the GroupDocs.Watermark.dll file and specify the file name, without a path, as shown in the examples below.
Applying License from File
The code below will explain how to apply for product license.
Applying License from Stream
The following example shows how to load a license from a stream.
Applying 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 set metered public and private keys.