Evaluation Version Limitations
You can easily download GroupDocs.Assembly 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 few limitations while using the API without the license. See the limitations below regarding each supported format while using non-licensed GroupDocs.Assembly:
GroupDocs.Assembly (without a license specified) generates the document reports with full product functionality, but it inserts an evaluation watermark at the top of the document
When a Spreadsheet report is generated it contains an extra worksheet with Evaluation Copyright Warning on it, you can't hide the Evaluation Copyright Warning (the extra worksheet)
When a presentation report is generated using GroupDocs.Assembly, an Evaluation Watermark is injected at the center of each slide
It limits the maximum document size to several hundred paragraphs
When running your program, you can only generate 100 Spreadsheet reports using GroupDocs.Assembly. If your application exceeds this number, an exception will be thrown
You can't re-specify the script path (e.g in the web.config file)
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.Assembly 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.Assembly.jar 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 license from the file.
Applying License from Stream
Following code snippet shows how to apply license from the 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.