New Post: Version 2.2
According to NPOI roadmap, in version 2.2 it will be able to handle ppt. And i need to transform slides of an ppt to jpg.
View ArticleNew Post: Version 2.2
I'm afraid this will be postpone to some other version like 2.5. In 2.2, we have to solve something urgent
View ArticleNew Post: NPOI generated Excel file with multiple columns -- showing only 1
What's ExcelDataReader?
View ArticleNew Post: System.NotImplementedException: DATEDIF
I have a spreadsheet containing a DATEDIF formula within a cell. When I attempt to evaluate the formula, I get the above error. I've tried this with both HSSF and XSSF, with both the...
View ArticleNew Post: HSSFWorkbook.WriteProtectWorkbook makes the file Read-Only
Hello, I am using the below function to protect the excel sheet with the password. The function works fine but it makes the Read-Only recommended property of the .xls document to True which allows the...
View ArticleNew Post: How can i change Table Cells Font ???
How can i change Table Cells Font in NPOI word ??? thanks.
View ArticleNew Post: Hyperlinks worked, then quit working...
Using current version of NPOI under Win7 64-bit, VS2013. My program worked great (under 4.5.1), I was able to add a hyperlink to a directory that brought up Windows Explorer in a newly-created...
View ArticleNew Post: Hyperlinks worked, then quit working...
showens wrote: Here's a code snippet; does anything look incorrect?ICell cmdLineCell = row.GetCell(4); cmdLineCell.SetCellValue(fullPath); string uriDir = Path.GetDirectoryName(fullPath); Uri linkAddr...
View ArticleNew Post: Conversion from XSLX to XLS and vice versa
Is it possible to open a XLSX file and save it as XLS file? In other words, is it possible to convert XLSX to XLS and vice versa?
View ArticleNew Post: How to add empty row in Excel combobox using NPOI
Hello all First i'm sorry about my bad english, but i hope you will help me Second, i have a trouble... use NPOI latest version for C# net 2.0HSSFWorkbook xssfwb; //open file using (FileStream file =...
View ArticleNew Post: Stress test of XSSF proves exponential time (performance concerns)
Hi All, I have similar issue but with cells not rows. I am adding lot of cells (> 10 000) in a single row. According to performance analysis, I have problem with GetLastKey on XSSFRow. I am looking...
View ArticleNew Post: Stress test of XSSF proves exponential time (performance concerns)
Update: I've tried to update the source code and it helped. Data export in my application duration reduced from 7 minutes to several seconds. XSSFRow.cs:private SortedList<int, ICell> _cells;int...
View ArticleNew Post: Slow iteration in XSSFSheet
Hello, I have a performance issue with XSSFSheet. I have a sheet with 65536 rows (yes, that is a maximum for HSSFSheet). If I use exactly the same processing of the same data being stored as XLS and...
View ArticleNew Post: Slow iteration in XSSFSheet
The reason is simple. HSSF is for binary based Excel format called BIFF format. XSSF is for XML based Excel format called OpenXML. XML is very slow in .NET (maybe XmlReader can be faster but it's...
View ArticleNew Post: Protect Sheet with AutoFilters
I am alo facing same issue, filter not responding after sheet protection.
View ArticleNew Post: Slow iteration in XSSFSheet
I understand this is a reason for slow serialization/deserialization. But does it have the same impact on the speed when traversing data already read in the memory? I have managed to speed my...
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