So I have a code segment where I am expecting a method that is repeatedly called from inside a loop to return null at one point - null is returned bec ...

So I have a Parallel.ForEachAsync loop like so: await Parallel.ForEachAsync(batchSysIds, parallelOptions, async (batchSysId, _) => { await Gen ...

Using the NPOI package, can an API receive an Excel file (xlsx), use that file in memory to process, then return a second Excel file as the response, ...

I use NPOI 2.6.0-rc-3 with .net framework 4.8.1 for updating .xlsx file. Excel file includes charts with it. excel file get crashed and after saving. ...

I am using NPOI to generate excel file from Sql table. Everything works fine but when i tried to open the file it give me following error. Above c ...

I'm trying to create an Endpoint in .NET Core 6 that should return a Excel File. The Problem is, that when i try to open the Excel File, it says the f ...

I am planning to use NPOI package to generate excel file.(get it from nuget package) But I am worrying about if the package call api in the backend? ...

I'm trying to do an excel where to import some data with validations and I've never used npoi before (and my knowledge of excel is as user) so I'm kin ...

I am attempting to upload an Excel document created using the NPOI library to a SharePoint Online site using the Microsoft Graph API. When I write th ...

I have a problem with NPoi. I need to read an xlsm file, locally the code works fine, but on the server have error: Wrong Local header signature: 0xE ...

PROBLEM: I've hit a troubleshooting wall and hoping for suggestions on what to check to get past an issue I'm having with an internet site I'm working ...

How do I set the Print Orientation of an XSSFSheet to Landscape in .NET? I can only find Java related solutions for this, and this doesn't work in .N ...

I know how to set the title, but can't find a way to set the title not to overlay the chart ...

I am trying to convert xlsx file to html using below code but i am getting "Illegal IndexedColor index: 0" exception. please help me how to fix thi ...

I am trying to read date cell from Excel file: But I am getting an error while trying to return the cellValue: Can not implicitly convert type ...

I am trying to create a new column in the middle of an existing .xlsx sheet, but I can't find any way to do it. I am able to easily create a new ro ...

I have a .xls file with plenty of named ranges containing values I would like to extract. The end goal is to automate that data extraction, but there ...

So I've just been introduced to NPOI, with the aim of eliminating the usage of interop - particularly for Excel files. I'm a fairly novice programmer, ...

Got an error in aspnet zero ExcelExporter class. "The type arguments for method cannot be inferred from the usage. Try specifying the type arguments e ...

Below are my code, I'm stuck with can't append the contents in the excel, When first time load the program, the excel can output normal But at Second ...