New Post: HSSFWorkbook.GetCustomPalette and file's modify date strange behavior
Hello, I have a strange behavior with XLS file produced by NPOI 2.0 (haven't test older version) using the following simple code :HSSFWorkbook hssfworkbook = new HSSFWorkbook(); //string filePath =...
View ArticleNew Post: Formula Evaluation
As long as the funtion used in the formula is implemented in NPOI.
View ArticleNew Post: Problem with recalculing.
Hello, I have one xls file. This file is like template. File have 4 sheets. Last 3 sheets contains data from application. The 1 sheet is template sheet, where are links to data. But my problem occurs...
View ArticleNew Post: Out of Memory Error - while writing to Excel using Xssfworkbook
No. Btw, how much memory did you consume on your computer when running the above code? for (int rownum = 0; rownum < 5000; rownum++) { IRow row = worksheet.CreateRow(rownum); for (int celnum = 0;...
View ArticleNew Post: .Net 3.5 to 4.5 Conversion.
Hi Everyone. I have upgraded the .net framework of an existing website from 3.5 to 4.5 I am now getting an "PageRequestManagerParserErrorException" on all the previous working exports. I have tried...
View ArticleNew Post: .Net 3.5 to 4.5 Conversion.
I Figured it out... The problem wasn't related to the dlls or anything server side. For some reason, calling the __doPostBack on the onclick event embedded on an html control broke it.<li...
View ArticleNew Post: XSSF Performance: degrade when creating huge number of rows
May I know when next version release?
View ArticleNew Post: Creating secured Office files
Do you know if it is possible to create Office files write-protected using these libraries? I'll be grateful for all suggestions.
View ArticleNew Post: Stress test of XSSF proves exponential time (performance concerns)
Hi zosea, I suggest you try the latest source code in github. The performance has been improved a lot.
View ArticleNew Post: read word doc into string
It supports it but not in official release. ScratchPad namespace is for test purpose. Any source code in it is not stable.
View ArticleNew Post: XSSF issues (ShiftRows, lastRowNumber)
There are some bugs in ShiftRows in NPOI 2.0 beta 1.
View ArticleNew Post: Convert/Save HSSFWorkbook as XSSFWorkbook
This is not easy because you need to copy every objects from HSSFWorkbook to XSSFWorkbook. For now, it's not supported by NPOI.
View ArticleNew Post: Get Physical Column Number
Hi I'd like to know, if there is a way to get Physical Number Of Columns from Excel Thanks
View ArticleNew Post: Excel Data Writer Wrapper in Excel using NPOI
Made a .dll Wrapper where you can quickly make a template in excel, run your SQL or input your data set, and get an output of your data in an excel format. The only work you would do is in Excel. Also...
View ArticleNew Post: Stress test of XSSF proves exponential time (performance concerns)
I still have bad timings using the new OOXML. I did however replace all the SortedDictionary<> in the GetLastKey calls with Dictionary<> and my times improved to this. This probably...
View ArticleNew Post: Get Physical Column Number
In NPOI, the hierarchy is row based. You have to go though the IRows to see the lastcellnum of each row.
View ArticleNew Post: XSSF Performance: degrade when creating huge number of rows
The next version is NPOI 2.0 beta 2. It's planned to be released next month (Dec, 2013)
View ArticleNew Post: Stress test of XSSF proves exponential time (performance concerns)
Hi All, I'm glad to say that the performance is greatly improved after changing the way of implementing GetLastKey() Start time: 2013/11/24 21:47:55 [00:00:00.0439453] 0 rows written [00:00:00.1054687]...
View ArticleNew Post: XSSF Performance: degrade when creating huge number of rows
Btw, I ran your program based on the latest code in github just now. Here is the latest result. Start at 2013/11/24 21:51:59 End at 2013/11/24 21:52:01 I switched to Stopwatch to get more precious...
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