NET that you should instead follow. CSV parsers are great for taking tabular data and deserializing it into objects and should be used where they can. I figure the best way to compare the different libraries on offer is to create a simple spreadsheet to compare the different ways we can read data out. Then in column B2, we have a reference to cell A2. We will try and extract these styling elements out later. Again, this is so we can test getting both the formula and the computed value, but this time across different sheets.
When I first started hunting around for parsing excel in. Honestly what can I say. It picks up formulas vs text perfectly! The styles on our first sheet was also pretty easy to get going. I blew a bunch of time on this to try and work out the best way to use NPOI and the documentation is awful. I saw they had a link to a tutorial on how to read an Excel file which looked promising, but it was literally reading the spreadsheet and then dumping the text out.
Almost every google answer will lead you to StackOverflow with people using NPOI with such specific use cases that it never really all pieced together for me. ExcelDataReader appeared in a couple of stackoverflow answers on reading excel in.
NET Core. I wanted to make this work but…. The first line in particular is really annoying Everything blows up without it. The above only returns the computed results. Syncfusion is one of those annoying companies that create pay-to-use libraries, upload them to nuget, and then in small print say you need to purchase a license or else.
Does the generation of 50 excel files require user interaction? If not, you can create a nightly job that generates files. If it is a plain text kind of a format or CSV , you don't need Excel. Also, you can use one excel instance to generate all the files, one after the other.
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Active 11 years, 3 months ago. Viewed times. Pls help me. Edit: The excel genration doesn't need user interaction. Its a scheduled job. Any kind of Excel pooling logic will help? Please direct me. Improve this question. Shiraz Bhaiji Do you have 50 open files in the same time? What exact format are you generating? Do you really need 50 files? Can you use one file with 50 worksheets in it? I need 50 files. Each file will be emailed to different user. Add a comment. There are several ways to work with Excel files from the application:.
It provides pretty good performance. But has some limitations when you cannot retrieve all the values from the same column if this column contains mixed types of the data for example, strings and numbers. In this case you need to retrieve data as strings and then take care to convert everything into proper type.
Use Microsoft Office Tools for. This way is slower, but gives you more functionality and allows formatting of the data. It allows you to control your output, but could be very slow and you need to pay attention to releasing all the resources associated with it, because it is COM-based.
Use third party components that could provide desired functionality. I, personally, created my own component to output data into Excel without using Jet or any other tools, just because none of them met my performance requirements.
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