readme-EPPlus.txt ---------- 20200316 EPPlus 4 https://github.com/JanKallman/EPPlus 授權 = LGPL, 可免費商業使用, 需 open source. 最後 readonly 版本: v 4.5.3.3 EPPlus 5 https://github.com/EPPlusSoftware/EPPlus 授權改為需要購買商業授權: EPPlus has from this new major version changed license from LGPL to Polyform Noncommercial 1.0.0. With the new license EPPlus is still free to use in some cases, but will require a commercial license to be used in a commercial business. EPPlus Create advanced Excel spreadsheets using DotNet, without the need of interop. EPPlus is a .net library that reads and writes Excel files using the Open Office Xml format (xlsx). EPPlus has no dependens other than DotNet.   EPPlus supports: Cell Ranges Cell styling (Border, Color, Fill, Font, Number, Alignments) Data validation Conditional formatting Charts Pictures Shapes Comments Tables Pivot tables Protection Encryption VBA Formula calculation Many more... Overview This project started with the source from ExcelPackage. It was a great project to start from. It had the basic functionality needed to read and write a spreadsheet. Advantages over other: EPPlus uses dictionaries to access cell data, making performance a lot better. Complete integration with .NET Support All support is currently referred to Stack overflow. A tutorial is available in the wiki and the sample project can be downloaded with each version. The old site at Codeplex also contains material that can be helpful. Bugs and new feature requests can be added to the issues tracker. License The project is licensed under the GNU Library General Public License (LGPL). ---------- 20200316 https://www.epplussoftware.com/LicenseOverview/ Pricing Commercial licenses Our commercial licenses are based on a subscribtion model, rather than the traditional model with a perpetual license per major version and a separate renewal fee. As long as you have a valid license, you can always upgrade to the latest version of EPPlus. We will constantly add new functionality, fix issues and improve the software - and our customers should benefit from those updates without hassle. More info in our License FAQ Licensing/Billing Licenses are per developer, but not personal. Terms and conditions as specified in our End User License Agreement. Number of licenses can be increased or reduced via our website. Support is included via our website We accept Visa, Mastercard and American Express cards All payments/billing are handled via our payment provider Stripe Commercial use Use EPPlus in a commercial context. The license is per developer and valid for deployment on a unlimited number of servers within the same company. For detailed terms and conditions, see our End User License Agreement (EULA). Optional and free trial period of 32 days. 同一家公司內不限制數量. # licenses Price/license 1-4 299 USD/year* 5-9 269 USD/year* 10-24 249 USD/year* 25-49 229 USD/year* 50- 179 USD/year* * Prices do not include taxes. Pay as you go 同一家公司內不限制數量分派使用 Valid for deployment on unlimited servers within the same company. Number of licenses can be increased/decreased per month and the license can be paused/terminated at the end of each period. For detailed terms and conditions, see our End User License Agreement (EULA). # licenses Price/license 1-9 29 USD/month* 10-∞ 27 USD/month* * Prices do not include taxes. License Polyform Noncommercial license EPPlus is from version 5 and onward licensed under the Polyform Noncommercial license, which means that its code is freely available and that it can be used for non commerical purposes. License summary 1. Personal use for research, experiment, personal study, hobby projects, etc, without any anticipated commercial application. 個人研究、實驗、個人研究、業餘愛好等個人用途, 無預期的商業應用 2. Noncommercial organizations, for example charity, education, public research/safety/health. 非商業組織，例如慈善，教育，公共研究/安全/衛生。 3. Usage of EPPlus in a commercial environment requires a commercial license. 在商業環境中使用EPPlus需要獲得商業許可 ---------- 20200316 EPPlus 5 license From LGPL to Polyform Noncommercial LGPL to Polyform From LGPL to Polyform Noncommercial From version 5, we have changed the license from LGPL to Polyform Noncommercial 1.0.0 - a license that permits noncommercial use only. In combination with the Polyform Noncommercial license we sell licenses for customers who use EPPlus in a commercial business. Since EPPlus has been around for a while, you might wonder why we have decided to do this change. The story behind EPPlus We are two brothers - Jan Källman and Mats Alm - based in Stockholm, Sweden. Jan started EPPlus on Codeplex back in 2009 for the simple reason that he needed a spreadsheet library in a project he was working on and there was not really anything available at the time with enough performance and functionality. After some time Mats joined and we started to build it together, mostly for fun. We have never marketed EPPlus, but it started to spread across the .NET community anyway. Somewhere around 2014 it was the most downloaded spreadsheet package on Nuget. During 2019 it had over 6,5 million downloads and was among the top 100 most downloaded packages, not bad for a hobby project! Challenges All our work with the library had to be done on our spare time (weekends, holidays, evenings/nights) and for various reasons we have had less time to spend on it the last years. At the same time the usage of EPPlus increased rapidly and, after we moved to github, the number of issues and pull requests increased rapidly as well. Pull requests are great, they can however be a bit tricky to handle since parts of the library has poor test coverage and it is not easy for someone who is not fully familiar with the code to understand all side effects that it might cause. Issues/questions from users started to pile up and it was difficult to know even where to start having only a few hours now and then. Some of the code in EPPlus is 10 years old and needs refactoring/redesign and better test coverage. At the same time new versions of Excel, .NET Framework/Standard/Core was introduced and more work needed just to keep up with that. This was not a good situation neither for us nor the users of EPPlus. In the end of 2018, we reached a point where we had to decide what to do with the project. EPPlus Software We have founded EPPlus Software to be able to work full time with EPPlus and we are convinced that this will lead to a much better product in the long term. We are now releasing EPPlus 5, the first major version under the new license model. EPPlus 5 is the result of a process where we have worked with lawyers to ensure that we legally can change the license. But we have also implemented a lot of new features, fixed many issues from EPPlus 4 and improved the code from previous versions. What happens with EPPlus 4? EPPlus 4 is still (and will always be) licensed under LGPL. You can of course continue to use EPPlus 4 and previous versions and you can still install them via Nuget. PM> Install-Package EPPlus -Version 4.5.3.3 The code for EPPlus 4 will stay on Jan Källmans github repo and can be forked/used according to the LGPL license. Our focus, however, will be on version 5 going forward. Pending pull requests If you have submitted a pull request to EPPlus 4 and think that the pull request should be applied to EPPlus 5, you need to resubmit it to our new github repo. Legally (under LGPL) the pull request is your intellectual property, not ours, and it needs to be resubmitted under our new CAA (Contributor's Assigment Agreement). For more info see CONTRIBUTING.md The new license model EPPlus 5 is licensed under the Polyform Noncommercial 1.0.0 license. Read more about it here. Future way of working We want to keep the community driven way of working. Unlike other commercial alternatives, our code will still be fully available and open. There will be no user specific license keys to set in the code, just a LicenseContext property that needs to be set in debug mode to make users aware of the new license. The code for EPPlus 5, the new sample projects and wiki has moved to EPPlus Software’s github account. Welcome to EPPlus Software!