Epplus open excel file. 28 Writing an Excel file in EPPlus.

Epplus open excel file Open excel with EPPlus without saving to file. This is the code that I have in my ExportDocument. When I open spreadsheet with Excel it shows green triangles in the cells with numeric values giving warning that 'Number Stored as Text' and giving option to ignore it for particular cell. (per the comment below and days of google searching) I'm trying to read in an excel file and pass that to my EF model. However I failed. They then select the file to upload and this is where it fails. However, I am having an issue on how to write the data from the stored procedures into the Excel file. xls (for excel 97-2003). There is a much better way: EPPlus. The library is designed with the developer in mind. EPPlus is a . Do you want us to try to recover as much as we can? If you trust the source of this workbook, Click Yes. Create a temporary excel file with epplus? 0. Since it has not been ran through the Excel engine it Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Ok. Per my comment, if you dont want this or cannot guarantee it (paying for an office licence just to read an excel file is expensive and unnecessary) you should use the ACE driver or EPPlus to read your excel; neither needs Excel and both are free Then after editing I am Saving as the file as newFile. 0. Saves the three values into an entity that is saved into a List<>. NET library that EPPlus is a . Trying to read an Excel file with EPPlus works on the server, but not through a browser. Bulk Delete . i searched google to know how to change I have a file excel with 2 columns: Name, price. " You cannot do that with epplus. I use EPPLUS library to create the excel file and save it in a determined location. Maybe because you've used an old xls file, EPPlus supports only xlsx. xlsx file that the user can download after clicking a button. Load large amount of excel data with all xlsx files are really zip files. ) – I'm storing mix of numeric and non-numeric values in a single column in spreadsheet using C# and EPPlus. Read large Excel file with EPPlus using Async/Await C# 6. EPPlus can load a file into memory. EPPlus supports It had the basic functionality needed to read and write a spreadsheet. I am using . Here is a generic function in C# to import data from an excel file to onject's' collection. txt"; string extenstion = Path. Viewed 395 times 0 I want to be able to open an Excel file (or create if it doesn't exist) and add data to it asynchronously. EPPLus generates only the necessary minimum of Just looking for some advice for the best way to open an existing excel file, carry out some process on the data and then save it again while prevent others making edits to the excel file between my load and save. Workbook. In this tutorial, i will show you how to edit an excel file in C# by using the EPPlus library. 2 Opening a client-side Excel file using EPPlus From the exception message, it seems highly likely that your Excel file has URIs in an incorrect format, and some versions of EPPlus throw exceptions in opening workbooks with incorrect URIs. I am making an API using C# that takes excel files and transforms and saves its data to database. Add("demo"); I have a method that creates an excel file and sends it as an email's attachment. EPPlus formula not running. Another point: You are using the same pathe muliple times in the using section - this will definitely fail. Good morning, I would like to edit some cells from already existing excell file. WriteAllBytes the file is saved EPPlus Documentation. Make sure you get the latest version of EPPlus from code plex, apparently the latest versions have patches that resolve this specific issue. How to read excel using The code runs, creating the file, and the user is prompted with a "You have chose to open: thisismyexcelfile. I think if you do this, you're less likely to run into trouble reading it from the file system. zip and navigate the folder hierarchy yourself. SaveAs method to make a copy of the template file. xlsx Created and Saved Using Template with EPPlus is Unreadable/Corrupt. Length) Dim exlpck As New ExcelPackage(excel) If exlpck. 4 Open excel with EPPlus without saving to file. 28 Writing an Excel file in EPPlus. 2 How Load Excel File With Password In C#. I’ve used this in many projects, and have found it invaluable when the requirement to either read or write Excel files Getting started with epplus; Append data to existing document; Columns and Rows; Creating charts; Creating formulas and calculate ranges; Filling the document with data; Formatting In this article, we will show you how to use EPPlus to read an Excel file into a DataTable. About; Products OverflowAI; Opening Excel Document using EPPlus. Ask Question Asked 6 years, 4 months ago. When opening excel on the server it will keep a copy of excel running. Changing background colour of a cell in excel. 1. I have googled, but found nothing useful except the above. You do need to put the EPPlus assembly on the server though. What code am I missing? EPPlus is a . Provider = "Microsoft. NET Framework/. Topics Trending Collections Enterprise Enterprise platform. I try to open an Excel file with the XML extension with EPPlus library. Do you want to search the Microsoft Office Online Web site for a converter that can open the file? I select No here and then it opens the Excel file and displays this error: Excel completed file level validation and repair. 8 Password Protected Excel Download using EPPLUS. ExcelPackage Private EPXlFile As FileInfo Private EPXlSheet As ExcelWorksheet Private EPXlWorkbook As ExcelWorkbook I am using the EPPlus library to generate an excel file which I successfully save in a folder on the server. To download this library: 1- Go to Tools > NuGet Package Manager > In this guide, we will explore how to read XLSX files using the EPPlus library, a popular open-source library for working with Excel files in C#. there are certainly more efficient ways of doing this, but this is a quick and dirty solution that will get the job done. 4 I'm using ExcelPackage throughout my wpf application for generating csvs and xlsxs, whenever I open a xlsx that has been generated by epplus in excel it opens without an error, but when I open a generated csv in excel it shows me "The file format and extension bonus of "filename. Horrible. Format(fileName, Start by creating an Excel file without the feature that you want. GitHub community articles Repositories. Close() pck. Open(@”C:\Users\username\Desktop\Northwind. I am trying to open an Excel document using EPPlus reference/package. those are Vertical, Summary, Delta & DashBoard. 6 EPPlus multiple saves. So I'm using the fancy EPPlus library to write an Excel file and output it to the user to download. So, without hard coding I should be able to put the value under column header "First Name" to the model field "cnst_first_nm". 1. Tags; Topics; Examples; eBooks; Download epplus (PDF) epplus. Worksheets[1]; int col = 1; for (int row = 1; I'm trying to read and excel file from the client using EPPlus without uploading it to the server or using a file upload control. Microsoft specifically warns against trying to automate Office If you use EPPlus, it's as simple as this:. Problem: I want to access the sheet without having to save the file. When we export a file using EPPLUS, the end user is supposed to edit data, upload it back to the UI for validation. It throws me this exception: "System. For some reason, my code was now including the temp file in the list of files in the folder. I've created a method that converts an Excel file to a DataTable using EPPlus, and tried to maintain When we try to open a file protected in Excel 2007, it works but when we try to open same file protected in Excel 2010, it does not work. I did the following: using (MemoryStream protocolStream = new MemoryStream()) { ExcelPackage pck = new ExcelPackage(); HashSet&lt;s Commenting this line out seems to work fine but that leads me to my main problem: when the file is saved and then opened in excel, Excel complains there is a problem with the file. NET library that reads and writes Excel files using the Office Open XML format (. Commented Nov 3, 2023 at I am writing a code in C# MVC using EPPlus. There are basically two approaches to handle Excel (and Office files in general) programatically, esp. RIP Tutorial. Fund open source developers The ReadME Project. Modified 6 years, 4 months ago. After the file is created, it cannot be deleted or edited, as it is said to be used by "another user", as long as the program is running. Does EPPlus support work it? Thanks and best regards Currently, in a small but important project, I have to read a rather large Excel File. Empty; using (ExcelPackage I find out a solution by using try catch like I just opened my excel file and then try to save that file from . I guess, it should be like this, rather than hardcoding you should use OleDbConnectionStringBuilder class . View license Security policy. Then I immediately call this file to run (Excel will open and my file is loaded). Opening a client-side Excel file using EPPlus. Open a new Excel-object 3. NET Core and I've verified that I am trying to import an xlsm file using EPPlus. csv" don't match. EPPlus is only able to open . If you don't have the EPPlus library installed already in your project, you can view how to download and install it on our website. How to Save excel file in vb. xlsx")); and create a new file - your file will be created without any issues. NET 5 Excel File Download exmaples using EPPlus and ClosedXML code - tysongibby/BlazorExcelFileDownload. Learn epplus - Import data from Excel file. Fastest Entity Framework Extensions . OLEDB. . Here is my code: I'm trying to output a ExcelPackage created using EPPLUS to a file path without Excel actually opening up the file. I read on their site that you can use templates. Short answer: EPPlus does not actually support xltx template files, the 'template' parameter just expects an appropriately pre-formatted xlsx file. With the Excel Interop library it works too, but I would like to test performance with other library. Application and Epplus opens quickly , by the way my program is winform not web. I can't get the Excel application to open. Commented Sep 14, Maybe you can take a look at Koogra this is an Open Source excel reader (readonly no writer) I think you I am using the Open Source EPPlus library which allows you to read Spreadsheet files like Excel. xlsx files. Write(excel, 0, excel. Asking for help, clarification, or responding to other answers. It won't open on my Win8 machine with LibreOffice 4. I am very surprised that the File EPPlus is generating the xml in a renamed zip file so there is no mechanism to transfer it to Excel without saving it somewhere. FileName)); Dim consh As ExcelWorksheet 'Dim excelStream As New MemoryStream() 'excelStream. If I close the stream them immediately call File. 6. My impression is that EPPlus makes well formed files, so what am I missing? Update #1 I tried directly saving the EPPlus package to disk. Using EPPlus, I want to read an excel table, then store all the contents from each column into its corresponding List. Now, I have an Excel file but I want to check the Background Color of a Cell before I get the value of a cell. I was able to read it with the Excel API from office, but since I cannot install office on my server, I need to avoid this dependency. Following is the full code to validate the excel sheet. Excel cannot open the file {Name}. in C#: InterOp; third-party libraries; With interop you are using an excel version that is installed on the machine, with libraries excel file created with EPPlus, displaying message while opening that file has to repair, click yes 0 Excel file created using EPPlus has 'invalid format' I need use EPPlus to read file . If using ExcelDataReader, my code looks like. you can copy/rename the . CreateOpenXmlReader(excelStream); excelDataSet = I am exporting data in Excel form using EPPLUS Excel Library. You could open your original document, write the changes to a new file, then delete the original file and rename the new file Blazor . InteropServices. Once you have created a Workbook object, you can open an Excel file by using the following code: c workbook. NET application to use the EPPlus library for saving Excel files (was previously using MS COM interop library), and the performance is better (about 50% speed increase), but the actual call for saving the file is pretty slow (in some cases, slower than the save call when I was using MS COM interop). Excel can open the file without any errors. This is the first time I have ever used EPPlus and I am My problem wasn't the table range, Epplus generated the file just fine, but rather that the server response was appending the page response to the excel file, obviously making the file invalid. In this tutorial, i will show you how to read an excel file in C# by using the EPPlus library. 24 Opening Excel Document using EPPlus. This file cannot be opened by using Microsoft Excel. Worksheets(cellExcelTabName) Is Nothing Then consh = exlpck. I have an excel . Thanks! I've made a simple performance test between EPPlus and Spreadsheet Gear to see if there is any significant difference that would justify buying Spreadsheet Gear. Let's take a look at how to do that. FileInfo newFile = new FileInfo("sample. OpenOrCreate, System. How to check if the Worksheet already exist in Interop. I am already using epplus. Add method to copy a worksheet from one file to another. First(); //this is important to hold onto the range reference var cells I use the following code to open an excel-file: Private EPXlApp As OfficeOpenXml. Also, unlike before, when I try to open a file after it is not locked anymore, I get a message that the file is unreadable and I have the code to execute multiple stored procedures from SQl. navigate to xl/media to see your images. The problem is that you're reading from and rewriting to the same file stream simultaneously. So fare I see examples to create a spreasheet, but did not find any on opening an excel file and read values from it. When user posts file back I'm trying to open and read it using EPPlus; When I post file which was filled in Excel2010 everythins works fine. Verify that the file has not been corrupted and that the file extension matches the format of the file. Template file (xlsx) produced in Excel 2007 or 2010. Stream. Open excel file in a temporary file. Following is the excel sheet structure. Use EPPlus to open spreadsheet from server/LAN folder. xlsx format. xlsx`. Version 5 supports . Related questions. NET frameworks . A simple example how you can read excel file using EPPlus in . But when I post file from Excel 2007 a have an exception in ExcelPackage ctor. That's why the spreadsheet file does not get updated. I would like to share my solutions for this problem: I just added a NON-BLANK header line for the comments, such as "REF" here: Dealing with empty cells when importing Excel file using EPPlus. Create a header row Learn epplus - Import data from Excel file with FileUpload Control. This column need not be in this order in excel also. I have to search my data in a DB. Worksheets. The code you wrote reads an Excel file and saves it again without modification. IsEncrypted = true; Open excel with EPPlus without saving to file. Opens an existing Excel-file with 1000 rows and 3 columns. My Code so far: I can get the file to generate perfect without. You're just not doing it that way. If you want to use it in purest form and actually be able to call current then you would need something like this:. NET Core library for managing Office Open XML spreadsheets, distributed via Nuget . For the following method I'm just using some test data to minimize on the code, then I'll add the code I'm using to connect to database later. If I change the extension to . Reading data from an Excel file EPPlus-Excel spreadsheets for . 2. IO. I tried use EPPlus and normal OpenXml classes. now those sheets order are Vertical, Summary, Delta & DashBoard but i want to open that excel file and change the order again using code. Writing an Excel file in EPPlus. FileInfo("file. 1, an exception occurs on using the Worksheets. xml"))) I can open the file with Excel manually. Did you open the file in Excel while running your program? If so, EPPLUS will fail. I can export an Excel file. xlsx) and I want to read the contents of this file so I am using EPPlus. xls"); ExcelPackage pck = new ExcelPackage(newFile); var ws = pck. I'm just using EPPlus dll. Then I customize the new template file as required. As soon as I removed this part of the data the issue went away. Add("Worksheet 1") excel. This is done with the help of the EPPlus library. 0 Get data from SQL along with read excel in C#. Advantages over other: EPPlus uses dictionaries to access cell data, making performance a lot better. microsoft office interop excel open file without saving. I need to close the whole application to get the excel file unlocked. You could just save this to disk directly. Now I can download a file all fine, but when I go to open the file, Excel complains that it's not a When I use Epplus to export the excel it not downloading the excel file here are my code public ActionResult ExportDataTableToExcel(string searchBox) { FileStream fs = null; var fileName = " EPPlus is a . However, I am at a point of where I can't track what is going on. Hot Network Questions Has there been a clarification regarding whether the use of 'Get Real' move is encouraged or discouraged? Below is my code to read excel file. The downloading part is working fine. My Excel file has 4 sheets. I want that when excel downloaded it will ask for password. Note: You should not automate Excel from a service (or any non-interactive user); as Excel can appear to spontaneously lock up if a dialog box appears and there's no user to click it. This modified text is an extract of the original Stack Overflow Documentation Learn epplus - Import data from Excel file. public void ImportExcelXls(HttpPostedFileBase fileBase) { using (var package = new ExcelPackage(fileBase. Worksheets[0]; // OR foreach Epplus does not actually generate a full XLSX file - rather it creates the raw XML content (all office 2007 document formats are xml-based) and places it in the zip file which is renamed to XLSX. Ask Question Asked 7 years, 11 How to read the data from xlsx file when file is already open in C#. SaveAs(new FileInfo("Book2. EPPLUS Usage. NET. – Need to be able to read an Excel file uploaded using FileUploadControl in ASP. I am using following code Introduction. Size). zip and you will see it open in Explorer, 7-zip, WinRAR, etc. The file is already an Excel file. I think I'm best using the FileStream approach. I access it with a path looking like this : "\\Server\folder\file. NET library for reading an writing Excel files. I have a problem when save an Excel file in UWP app (Windows Template): Dim excel As ExcelPackage = New ExcelPackage() excel. I'm trying to fill an existing xls file with EPPlus, but i never use it before. it opens a stream to a real Excel file. NET Core from version 2. In both situation program won't crash but always re When I use the code below to read an Excel 2010 file that has password protection enabled for the workbook: using (FileStream file = new FileStream(fileName, FileMode. using (ExcelPackage package = new ExcelPackage(new FileInfo(sourceFilePath))) { var worksheet = package. NET MVC application. 3 Creating an excel file with EPPlus, but it is always read-only. COMException (0x800A03EC): Exception from HRESULT: 0x800A03EC" You can check the extension of your file: string file = @"C:\Users\Robert\Documents\Test. I am downloading the excel file with password using epplus library. NET library that allows you to read from and write to excel files. AFAIK the EPPlus library only supports the formats of MS Office 2007 and above, so there is no support for xls files, only for xlsx. Code. This runs without errors, but when I open the file in Excel, or load it back into EPPlus, I find that different protection options have been applied: Like @Thorians said, current is really meant to use when you enumerating the cells. TIA Sue. location works fine on the local machine but does nothing when its deployed to a server. xlsx). This modified text is an extract of the original Stack Overflow Documentation created by following contributors and released under CC BY-SA 3. I have an excel file on a server. xlsx")) How can i open this EPPlus Open File and lock file through multiple saves. In another program, an intranet website, the user can upload a spreadhsheet and the ExcelPackage objec I have the folowing function to return a FileStreamResult for my ASP. Start(Server. C# Excel generating. That data table has a property with int type, so I want the same format in the Excel file. Topics excel spreadsheet netcore epplus net netstandard ooxml netframework Resources. xlsx"); using (var package = new ExcelPackage( output )) { package. //The file can be opened by EPPlus by providing an empty string as password ("") package. Application because it takes some time to open Excel files in Excel. EPPlus has no dependencies other than . . 7. new order will be Summary , Vertical, DashBoard & Delta. NET library that reads and writes Excel files using the Office Open XML format (xlsx). Complete Introduction. For example if I have a class: public class Customer { public int Id { get; set; } public string Firstname { get; set; } public string Surname { get; set; } public DateTime Birthdate { get; set; } }. Verify that the file extension matches the format of the file. But, I want to read an Excel file from some path D drive or C drive or Virtual path. I havent found some kind of return values for the situation that some file cannot be open in the EPPlus documentation, but you can use this to catch the excetptions: What I want to do is create an excel file using the EPPlus library with some basic data in it that I am pulling from a stored procedure. – Tim Schmelter. Open(excelFilePath, FileMode. To download this library: 1- Go to Tools > NuGet Package Manager > Manage NuGet Packages for Solution. After writing the data into the excel file, I would like to save the Excel workbook. This is the best EPPlus solution so far, but I tried and I lose the Table formating in a range (when I opened the Excel, it says it found a problem and tries to recover, then the table is gone. 0"; connectionStringBuilder. To open . I want it to recognize the table's heading and categorize the contents based on that. ) I'm trying to read excel file with EPPLUS but i have one excepton, it is saying that System. The time of opening the saved file Two problem is occurring: If there is no Excel instance is running on the PC then the saved file is opening but with no data. When I try either of the following methods I get a System. Verify the the file has not been corrupted and that the file extension matches the format of the file. If I do not open the template file (blank or the real one) and just create a new workbook and create a sheet, it works fine. We dont have issues with opening files created in EPPlus in 2010. 16. AI-powered developer platform EPPlus-Excel spreadsheets for . thanks man, was trying so hard to know why epplus is not opening excel, turns out it was xls – Khizar Murad. Here is my code: FileInfo output = new FileInfo("myFile. EPPlus has no dependencies to any other library such as Microsoft Excel. public ActionResult DownloadExcel() { string sFileName = string. xlsx which is a: XLSX file (size here) from: mywebsite. 3. 1). i'm using an ajax call to access the To my knowledge, EPPLUS cannot open xls files, only xlsx files. Bulk Insert . ACE. Use FileInfo and open the file directly with ExcelPackage: Also, when I try to delete the file, I get the message: The action can't be completed because the file is open in WebDev. EPPlus will let you create native excel 2007/2010 I'm trying to open an excel file that I wrote using epplus. 1 release of EPPlus library to try to access a worksheet in an Excel file. 0. xlsx files; it cannot open . xlsx”); This code will open the Excel file located at `C:\Users\username\Desktop\Northwind. 14. You can turn uploaded files into a byte array without having it as a file first, but in my example I'm opening an existing file. Make changes to the spreadsheet. NullReferenceException : 'Object reference not set to an instance of an object. 4. DataSource = excelPath; // This is your I'm using EPPlus on . Clean approach. I am generating excel file with EPPlus. Save(); // see the various ways to Thanks, I have not found a function that prints , and i used Epplus driver instead of Excel. using (var p = new ExcelPackage(new System. System. EXE. c# excel EPPlus is a . Commented Jul 2, 2013 at 16:12. When I create file and open up the file, the following pop up message shows: We found a problem with some content in 'ExcelDemo. Stack Overflow. /// &lt;summary&gt; /// Generates a FileStreamResult containing a zip file with the EXCEL file in it /// & Open excel with EPPlus without saving to file. 0 Importing Excel File To SQL With C# Entity FrameWork. Add a comment | Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. If the Excel instance is running then the saved file is opening with Warning message but working. I am trying to create an ExcelPackage using EPPlus by uploading an IFormFile. Some code snippets now. NET Core Web API EPPlus is an open source . Readme License. Add(cellExcelTabName) Else consh = I created excel file by EPPlus with 2 sheets: data and chart on the data. A month ago, it was not. GetExtension(file); Update. Using EPPlus 4. See the following link for supported . 5. If you generated that file in EPPlus, then open the file in Excel program, save it again and close Excel. Does Skip to main content. You can test this by changing excelPackage. I open with epplus an excel file. Open, FileAccess. What is happening is EPPlus is generating raw XML files (the basis of all Office 2007 formatted files) based on what you give it and then placing them in a structured ZIP and saving it with an XLSX extension (try renaming any XLSX file to . Here is my example code below: using (var package = new ExcelPackage(excelFile)) { ExcelWorkbook workbook = I have now found the real culprit. Provide details and share your research! But avoid . xlsx' because the file format or file extension is not valid. Create a new ASP. How to check an excel workbook is already open in C# win forms. Then, we will I have a basic winforms app that a user can upload an excel file (. It appears that EPPlus produced a wrong format xml when there are comments. Format function so that it can dynamically create the file so if you wanted to create a file name with the Name and Date etc. xls files. 3- Choose the first search Hi, the file is created server side and then streamed to the users machine using the Response code above. 28. The problem is, I am trying to load the contents of a very large excel file, it has 7 tabs, with one tab haveing more then 200k rows, and another tab with 70k. The sending method works, but the issue is that it converts the excel to a txt file and when you open it says This file has been removed. Its probably worth including code in your question. – Dreaddan. What should firefox do with this file?" After selecting "Open with OpenOffice Calc" the spreedsheet opens and displays appropriately but is read-only. I have a set of excel files in windows folder that needs to be watermarked using c#. Add("worksheet"); package. I'm using the latest 4. :) c#; excel; epplus; Share. using (var pck = new ExcelPackage(existingFile)) { var worksheet = pck. Now, I want to bind another 50 rows continuous to those 5 rows in same Excel file. It would appear from the research I've done that the file is assumed to be on the server and opened from there, which doesn't exist. NET Framework from version 3. Is there any option to add watermark to excel using epplus?. But if I implement a password, I get this error: Excel cannot open the file '' because the file format is not valid. net 4. I want to export a data table to an Excel file with EPPlus. I am transforming the excel sheet to base64 and then convert it using epplus to excel sheet. xls to . Excel file created using EPPlus has 'invalid format' 1. It breaks down at line 159 where I am trying to put in the values from the excel file but keeps coming across as public static async Task<DataTable> GetDataTableFromExcel(IBrowserFile file) { DataTable dtTable = new DataTable(); using (MemoryStream memStream = new MemoryStream()) { await file. With EPPlus, developers can create, read, write, and modify Excel spreadsheets programmatically without the need for Microsoft Office to be public static void Createxlsx(string filename) { MemoryStream stream = new MemoryStream(); //create a package using (var package = new ExcelPackage(stream)) // disposing ExcelPackage also disposes the above MemoryStream { var worksheet = package. 4. Create an ExcelPackage object based on the data in the MemoryStream object. EPPlus Changing Border Color of cells. xlsx file in my project with all the styled column headers. I'm using epplus to write in a file an extense quantity of information in an excel template, but then I need to close the ExcelPackage as to be usable with the Excel application. 6 C# create/modify/read . Some parts of this workbook may have been repaired or discarded. Any help would be appreciated. ArgumentException : An item with the same key has already been added. I'm trying to set worksheet permissions for an XLSM file using EPPlus but it seems I can only set the default protection level, individual protections are not being set. Any ideas how to resolve this? Thanks in advance. Checking the Background Color of Excel file using EPPlus library. I am using EPPlus for my export to Excel function. It is currently a single DLL and has no dependencies to any other library such as Microsoft Excel. 5. How can download this file to my local machine? I have an Excel file generated on the server by using EPPlus the file is correctly made and using a window. Ending the server response immediately after sending the file Looking for a way to access a password protected excel file with ExcelDataReader and Epplus, can't find a proper answer. We will start by creating a new Cproject and installing the EPPlus NuGet package. It creates, reads, updates and calculates workbooks compatible with popular spreadsheet applications such as Excel. I am creating an Excel file using the EPPlus library. xlsx extension to . CopyToAsync(memStream); using (XLWorkbook workBook = new XLWorkbook(memStream, XLEventTracking. Runtime. You'll need to generate the excel file server side, then send the bytes to the client using the appropriate MIME type so that the client can figure out how to open it. But you can always save to the users temp folder - this is what most programs have to do at some point Everything else stayed the same but Excel will actually open the files now! Here's my final code for anyone who has the same issue: Writing an Excel file in EPPlus. EPPLUS Download and Installation. Currently investigating if I can work-around the issue. No issues if I create an excel file from scratch, but if I need to update an existing one, even if passing it to the ExcelPackage ctor and calling a ExcelPackage. InputStream)) { // get the first worksheet in the workbook ExcelWorksheet worksheet = package. Like here the column headers in excel can be . While fetching the file and saving it back work fine using OpenBinaryDirect and It's safer (and faster, using less RAM) to save the file locally first, open that local file, modify it and finally upload that back to the server I should map the fields in the excel to this fields according to the column headers. EPPlus version: 4. Disabled)) { Is there any possibility to create and open XLSX (not macro) file generated by EPPlus with forced show "Save as dialog" before closing Excel? My scenario: I create XLSX file with EPPlus and store it to temporary folder of my application. It provides a simple and intuitive API that allows developers to generate, read, and modify Excel spreadsheets programmatically, Reading Excel files into a DataTable in C# has several practical applications across various industries and domains, "Excel cannot open the file 'xyz. The file will be located in the same location all the time. That seems to work without I'm using the 3. OR if I open the template file, and create a NEW worksheet, then it works fine. net. 2, but it will open on my coworkers Win8 machine using I create an Excel file using EPPlus library. Diagnostics. I have tried following code. When the user uploads the same file, as the one being exported without editing the file, this long operation occurs. OleDbConnectionStringBuilder connectionStringBuilder = new OleDbConnectionStringBuilder(); connectionStringBuilder. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. So it is needed to be The file name that errored started with ~$ which I knew to be a temporary file that MS creates when a file is open. excelStream = File. xlsx'. I want to merge multiple Excel files with EPPlus in C#. Encryption. The File must be closed to be opened by EPPlus+ 3. After insert data, the user could save the file on his computer, I doesn't know Opening Excel using EPPlus. However, I don't know what enum to use. dll. How can I achieve this? Any help is very much appreciated. Maybe you should open a question for that specific case then? – bastianwegge. BUT . and so on. xls, the file opens ok, and the script runs fine. Net 4. EPPlus is a highly popular spreadsheet/xlsx library for . "Problem with some content with EPPlus has a convenient LoadFromCollection<T> method to get data of my own type into a worksheet. I am now using EPPlus to help me with this task. For the purpose of this tutorial, we will use the below excel sample data. After reading some data, I would like to close the package: pck. I've got the below code right nowwhat am I doing wrong? Thanks. Process. NET 4. xls files you should automate Excel. 2. MapPath("~\chart. Read); excelReader = ExcelReaderFactory. xlsx"); using (ExcelPackage package = new ExcelPackage(newFile) { ExcelWorksheet ws = package. Which is having 5 rows of data already. you won't have to hard code it for example public string fileName = "Lista_Anagrafiche_{0}"; fileName = string. Excel cannot open the file 'myfilename. Contribute to EPPlusSoftware/EPPlus development by creating an account on GitHub. EPPlus - saved file I'm trying to use the EPPlus plugin to open a spreadsheet on our LAN and having mixed results. EPPlus Excel Change cell color. This is what I have so far: Open excel with EPPlus without saving to file. xlsx". I can open the created file without any Open file and read it into the MemoryStream object. But there are other libraries out there that are able to read/write xls files (though the only ones I know of are not free). 0 using C#. Commented Jul 7, 2016 at 8:43. Checking if file actually is an Excel file using EPPlus. 9. 5 and . The rest of the code has several issues two, right from the 2nd line onwards. Commented Sep 14, 2016 at 13:22. 12. I have the async component working quite well using a blocking collection, though if I want It's downloading the Excel file, but when I try to open it I see the message "Excel cannot open the file 'blahblah' because the file format or file extension is not valid. model-view-controller; epplus; Share. NET Core. Any All of them have different passwords. How to open an Excel Sheet and Use conditional formatting to change cell colors depending on existing results in C#. How to Opening an Excel file with EPPlus. 2- Search for EPPlus. 5 The new PC WILL need to have Excel installed. EPPlus can't convert a non-Excel file to Excel. Save after updating the data, or create a copy of the original excel file to pass to ExcelPackage ctor I obtain the same result. I recently updated my . Learn epplus - Import data from Excel file with FileUpload Control Import data from Excel file with FileUpload Control. I'm opening it using this and it works in development server but not after publishing it. My quick fix was I encountered the same issue when using EPPlus and exporting a large GeoJson or KML geometry string to Excel. The package will be encrypted but can be opened by Excel without a password. I'm on the latest beta of Epplus (4. NET open-source library for easily managing Microsoft Excel files in . not a problem in your filename I would not hard code it I would use the string. I need to restart the service. FileInfo newFile = new FileInfo("C:\\Excel\\SampleStockTakeExceptionReport. Save changes back to the MemoryStream object. I need to have 2 SaveAs, 1st SaveAs which is a save dialogue to allow user Open/Save/SaveAs and my 2nd SaveAs to allow the Excel file to be saved directly into the specified folder in the server as a backup copy. Dispose() Unfortunatelly the excel file is still blocked. xlsx because the file format or file extension is not valid. Here's my problem. cs file: It is loading and it runs through but there are no files created, nothing is opening up. – Meirav Elcharar. I'm generating an EEPlus . Improve this question. I'm working with SharePoint Client Object Model and EPPlus in C# to edit an Excel file retrieved from SharePoint. WebServer40. The solution will be hosted on a server. With EPPlus, developers can create, read, write, In this tutorial, i will show you how to read an excel file in C# by using the EPPlus library. Verify that file has not been corrupted and that the file extension matches the format of the file I thought of posting this as a solution, so that this will help to anyone having trouble validating excel sheet using EPPlus. EPPlus. 0 Import Excel file into database using Epplus and Sqlbulkcopy in MVC 5 Would the poulterer's be open on Christmas Day for Scrooge to buy their prize turkey? I am trying to open an XLSX file as a template (I have even used a blank XLSX file), using EPPLUS 4. It sounds really simple and all the samples I find are doing what I am doing, but mine doesn't seem to work. The file could be corrupted or unsafe. Now, I read (by EPPlus) and save the file again without any changes and Excel EPPlus is a powerful open-source library for creating and manipulating Excel files in C#. My workaround is to use the ExcelPackage. I using EPPlus to read file excel : OpenFileDialog dlg = new OpenFileDialog(); var package = new ExcelPackage(new FileInfo("" + dlg. 3 nuget version. I'm trying to return a FileStreamResult back through the MVC controller but i don't think it's working. ' worksheet a été null. OpenReadStream(file. xhkm rncp pzrze rlys ycdy rcdj hhl ofsjsl jiiyzr kiewrnk