Epplus open excel file. Read large Excel file with EPPlus using Async/Await C# 6.

Epplus open excel file Load large amount of excel data with EPPlus can load a file into memory. I have a basic winforms app that a user can upload an excel file (. xls files. 1. Open excel with EPPlus without saving to file. Using EPPlus, I want to read an excel table, then store all the contents from each column into its corresponding List. EPPlus has no dependencies other than . If the client doesn't have excel, or their mime EPPlus is a powerful open-source library for creating and manipulating Excel files in C#. 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. You don't need Excel to read or write them. 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: Thanks, I have not found a function that prints , and i used Epplus driver instead of Excel. txt"; string extenstion = Path. Any ideas how to resolve this? Thanks in advance. public static async Task<DataTable> GetDataTableFromExcel(IBrowserFile file) { DataTable dtTable = new DataTable(); using (MemoryStream memStream = new MemoryStream()) { await file. Ok, I've search all the other questions regarding this topic but have not yet found a good answer. now those sheets order are Vertical, Summary, Delta & DashBoard but i want to open that excel file and change the order again using code. With EPPlus, developers can create, read, write, and modify Excel spreadsheets programmatically without the need for Microsoft In this tutorial, i will show you how to read an excel file in C# by using the EPPlus library. Add method to copy a worksheet from one file to another. xlsx which is a: XLSX file (size here) from: mywebsite. It's easier and string filepath = txtBrowse. NET. If you generated that file in EPPlus, then open the file in Excel program, save it again and close Excel. ExcelPackage Private EPXlFile As FileInfo Private EPXlSheet As ExcelWorksheet Private EPXlWorkbook As ExcelWorkbook Blazor . I'm using 2007 excel. I have an SSIS package that pulls data from auto-generated xls files. I need to read an excel file and rename my excel worksheet programmatically. Fund open source developers The ReadME Project. Asking for help, clarification, or responding to other answers. 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. WebServer40. I have a function to check if the Excel contained the worksheet provided. The user will have to click "open" and if they have excel installed, it will be the default application to open the file. Dispose() Unfortunatelly the excel file is still blocked. Make changes to the spreadsheet. – user3745869. :) c#; excel; epplus; Share. I have the code to execute multiple stored procedures from SQl. However, I don't know what enum to use. 11 Is there a way to programatically edit Office I have the folowing function to return a FileStreamResult for my ASP. 1 release of EPPlus library to try to access a worksheet in an Excel file. Check if it suit your needs I use the following code to open an excel-file: Private EPXlApp As OfficeOpenXml. you have to just save WorkSheet by doing . To open . I try to open an Excel file with the XML extension with EPPlus library. Here is a generic function in C# to import data from an excel file to onject's' collection. 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. 2 Opening a client-side Excel file using EPPlus. xlsx) and I want to read the contents of this file so I am using EPPlus. 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. You're just not doing it that way. Open file and read it into the MemoryStream object. The file has sheet1; I want to write on sheet2, then save. If I close the stream them immediately call File. Worksheets. xls files you should automate Excel. dll. 28. It throws me this exception: "System. My workaround is to use the ExcelPackage. location works fine on the local machine but does nothing when its deployed to a server. new order will be Summary , Vertical, DashBoard & Delta. Does EPPlus support work it? Thanks and best regards. 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. NET Framework/. How to password protect an excel generated from a byte[]? 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. Opening a client-side Excel file using EPPlus. When I open the newly created files, if I close it without touching anything it asks me if I want to save my changes. zip and you will see it open in Explorer, 7-zip, WinRAR, etc. I think I'm best using the FileStream approach. using (ExcelPackage package = new ExcelPackage(new FileInfo(sourceFilePath))) { var worksheet = package. xlsx files are zip packages containing XML files anyway. Workbook; if A simple example how you can read excel file using EPPlus in . C# Excel generating. XLSX rather then . Improve this question. The other 5 total to about 50k. Reading data from an Excel file Opens an existing Excel-file with 1000 rows and 3 columns. Now, my problem is all the source point to the What I want is to build a link, which send and open the excel file to excel online or excel web app, in our . xlsx After adding all I want to a newly created excel file with epplus, how do I open it only? I don't want to save the file first then open it, is this possible? I want it to just open and let the user decide if he wants to save it or not. NET library that Start by creating an Excel file without the feature that you want. aspx page code. /// <summary> /// Generates a FileStreamResult containing a zip file with the EXCEL file in it /// & EPPLus generates only the necessary minimum of XML for the Excel program to read it. When I try either of the following methods I get a System. NET library that allows you to read from and write to excel files. Disabled)) { EPPlus can load a file into memory. 6 EPPlus multiple saves. What should firefox do with this file?" After selecting "Open with OpenOffice Calc" the spreedsheet opens and displays appropriately but is read-only. COMException (0x800A03EC): Exception from HRESULT: 0x800A03EC" 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. 0. Last commit message. How can I achieve this? Any help is very much appreciated. 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: 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. If code is working with the Open XML file format 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 values; Importing data from existing file; Create a DataTable from Excel File; Import data from CSV file; Import data from Excel file; Import data from Excel file I open with epplus an excel file. – problem arise when you write to file. GetExtension(file); Update. This show how to store the file data to memory. using (var package = new ExcelPackage(existingFile)) { // Get the work book in the file var workBook = package. However, if you only need to use the file for once, you may consider to put the file into memory and stream your file. FileInfo newFile = new FileInfo("sample. You do need to put the EPPlus assembly on the server though. I can export an Excel file. Size). 4 Open excel with EPPlus without saving to file. Application because it takes some time to open Excel files in Excel. Close() pck. I did the following: using (MemoryStream protocolStream = new MemoryStream Here is an example of merging several files into one by coping all worksheets from source excel files. xlsx' because the file format or file extension is not valid. In both situation program won't crash but always re Skip to main content. 9 Access Protected Excel File with ExcelDataReader Open excel with EPPlus without saving to file. Is there any excel generator that is excel file template 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: @using OfficeOpenXml; Excel file created using EPPlus has 'invalid format' 1. 16 excel file created with EPPlus, displaying message while opening that file has to repair, click yes. 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). What code am I missing? EPPlus is a . I have the async component working quite well using a blocking collection, though if I want to save every loop of my while statement i keep getting issues. Writing an Excel file in EPPlus. I have a problem when save an Excel file in UWP app (Windows Template): Dim excel As ExcelPackage = New ExcelPackage() excel. When I create file and open up the file, the following pop up message shows: We found a problem with some content in 'ExcelDemo. using (var p = new ExcelPackage(new System. Runtime. I can either get file corruption, or the data never saves at all. NullException error? 7. ArgumentException : An item with the same key has already been added. You can use the OpenXML SDK or libraries like Epplus to read and write Excel files. 2. Microsoft specifically warns against trying to automate Office Exception when open excel: File contains corrupted data. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. 0 Opening Excel using EPPlus. The code runs, creating the file, and the user is prompted with a "You have chose to open: thisismyexcelfile. 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. However, I am having an issue on how to write the data from the stored procedures into the Excel file. That's why the spreadsheet file does not get updated. I have tried following code. Verify the the file has not been corrupted and that the file extension matches the format of the file. Ask Question Asked 6 years, 4 months ago. 16. Open a new Excel-object 3. Saves the three values into an entity that is saved into a List<>. Then I customize the new template file as required. excelStream = File. i'm using an ajax call to access the controller method but it fails to enter 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 EPPlus is a . When we export a file using EPPLUS, the end user is supposed to edit data, upload it back to the UI for validation. This is the code that I have in my ExportDocument. EPPLUS Usage. I can't get the Excel application to open. xls file and just save. GitHub community articles Repositories. I am creating a series of Excel Workbooks using EPPlus v3. I have the async component working quite well using a blocking collection, though if I want 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. CopyToAsync(memStream); using (XLWorkbook workBook = new XLWorkbook(memStream, XLEventTracking. 0. – You cannot do that with epplus. Now, I want to bind another 50 rows continuous to those 5 rows in same Excel file. Once you have created a Workbook object, you can open an Excel file by using the following code: c workbook. 4. Execute PowerShell manipulation (open and SaveAs with Password) for Excel file on server without Office-1. I want that when excel downloaded it will ask for password. With EPPlus, handling Excel files becomes a breeze, allowing you to efficiently Learn how to read data from Excel in C# using EPPlus library, including accessing cells and ranges, parsing various data types, and handling formulas. File. 5. xlsx'. My Excel file has 4 sheets. FileInfo newFile = new FileInfo("C:\\Excel\\SampleStockTakeExceptionReport. Open XML SDK: How to update Excel cell? Hot Network Questions Город (plural form) EPPlus-Excel spreadsheets for . The file is created and saved succesfully but when I open it with Excel I get the error: "We found a problem with some content in 'filename. the Microsoft Jet Engine 4 Driver will only recognise the xls documents once they've been opened and saved so I need to add a C# scripted task to automate this step. I'm trying to return a FileStreamResult back through the MVC controller but i don't think it's working. I have now found the real culprit. Navigation Menu Toggle navigation. Sign in Product Open Source GitHub Sponsors. If using ExcelDataReader, my code looks like. Here is my example code below: using (var package = new ExcelPackage(excelFile)) { ExcelWorkbook workbook = // Get the file we are going to process var existingFile = new FileInfo(filePath); // Open and read the XlSX file. How to read excel using Hi, the file is created server side and then streamed to the users machine using the Response code above. FileInfo("file. OpenReadStream(file. Commented Sep 14, 2016 at 13:22. Open(filepath, FileMode. Open, FileAccess. Workbook. 9. /// &lt;summary&gt; /// Generates a FileStreamResult containing a zip file with the EXCEL file in it /// & I am exporting data in Excel form using EPPLUS Excel Library. In this tutorial, i will show you how to edit an excel file in C# by using the EPPlus library. 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. Verify that the file has not been corrupted and that the file extension matches the format of the file. The only code i've found and tried so far generates a file name, saves the excel file, and then open it. What matters with the "interop" is the version of Excel - that determines what functionality is available. In most of the case, you have to upload the file into server in order to really use it. Save(); // see the various ways to 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. Now you have two Excel files 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. Problems may be: EPPLUS cannot open xls files, only xlsx files. 1. Fund open Using EPPlus 4. Add("demo"); There are basically two approaches to handle Excel (and Office files in general) programatically, esp. aspx). Does Does anyone know how or can provide code sample of how to use my template. 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 values; Importing data from existing file; Create a DataTable from Excel File; Import data from CSV file; Import data from Excel file; Import data from Excel file Good morning, I would like to edit some cells from already existing excell file. Read large Excel file with EPPlus using Async/Await C# 6. Open(excelFilePath, FileMode. 28 Writing an Excel file in EPPlus. 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. (a for-loop opening, copying, saving 10 seperate times) Spreadsheet Gear is faster instead (approx times per file: EPPlus = 165ms, SG = 95ms). I use EPPLUS library to create the excel file and save it in a determined location. I want it to recognize the table's heading and categorize the contents based on that. WriteAllBytes the file is I have an excel . I want to be able to open an Excel file (or create if it doesn't exist) and add data to it asynchronously. With the Excel Interop library it works too, but I would like to test performance with other library. I'm trying to fill an existing xls file with EPPlus, but i never use it before. xlsx`. I can open the created file without any I have the folowing function to return a FileStreamResult for my ASP. Save changes back to the MemoryStream object. I am generating excel file with EPPlus. Reading from a binary Excel file Trying to read excel file with epplus and getting System. Commented Nov 3, 2023 at You can check the extension of your file: string file = @"C:\Users\Robert\Documents\Test. Allow Client to Download Excel File. I am using EPPlus for my export to Excel function. Commented Dec 12, 2014 at 19:37. " EPPlus is only able to open . Opening Excel using EPPlus. NET open-source library for easily managing Microsoft Excel files in . Working on a task that displaying or previewing an excel file, which generated by EPPlus, on web page (. Read); excelReader = ExcelReaderFactory. I'm just using EPPlus dll. 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. I have an Excel file generated on the server by using EPPlus the file is correctly made and using a window. Which is having 5 rows of data already. xlsx file with EPPlus? Open Excel Template from C# Resource. I am using following code EPPlus is a highly popular spreadsheet/xlsx library for . Save(); // you need to save this temporary sheet. var files = new string[] { @"P:\second. NET Core. How to read excel using EPPlus. NET library that reads and writes Excel files using the Office Open XML format (xlsx). i searched google to know how to change Introduction. Looking for a way to access a password protected excel file with ExcelDataReader and Epplus, can't find a proper answer. 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. xlsx file in my project with all the styled column headers. CreateOpenXmlReader(excelStream); excelDataSet = I need use EPPlus to read file . Ending the server response immediately after sending the file Currently, in a small but important project, I have to read a rather large Excel File. My impression is that EPPlus makes well formed files, so what am I missing? Update #1 I tried directly saving the EPPlus I want to write data to an existing Excel file, whilst preserving the original data. those are Vertical, Summary, Delta & DashBoard. Add ("Worksheet 1 Open excel with EPPlus without saving to file. Code. xls (for excel 97-2003). I've created a method that converts an Excel file to a DataTable using EPPlus, and tried to maintain 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. ) I am using Visual Studio 2013 C#, EPPLus. I tried use EPPlus and normal OpenXml classes. I need to close the whole application to get the excel file unlocked. As John Koerner says Excel works on files so you need your Excel file to be saved to file first. Excel cannot open the file 'myfilename. After reading some data, I would like to close the package: pck. However if you can work with . 0 Format Excel Workbook With EPPlus. Add("worksheet"); package. 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. It provides a simple and intuitive API that allows developers to generate, read, and modify Excel spreadsheets programmatically, You'll also have to buy a license for each one of your site's users. For the purpose of this tutorial, we will use the below excel sample data. Worksheets[0]; // OR foreach I want to merge multiple Excel files with EPPlus in C#. 7. Create an ExcelPackage object based on the data in the MemoryStream object. I have to search my data in a DB. Text; FileStream stream = System. EPPLus generates only the necessary minimum of In this blog post, we have explored how to import Excel files in C# using the EPPlus library. Trying to read an Excel file with EPPlus works on the server, but not through a browser. xlsx", @"P:\second. Ask Question Asked 7 years, 11 How to read the data from xlsx file when file is already open in C#. Modified 6 years, 4 months ago. InteropServices. Sign in ducdm87 opened this issue Aug 30, 2019 · EPPlus Open File and lock file through multiple saves. com by Debopam Pal explaining how to get up and running with 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 I am creating an Excel file using the EPPlus library. The problem is that every time I save, it will create a new Excel file and overwrite the existing one. EPPlus formula not running. It creates, reads, updates and calculates workbooks compatible with popular spreadsheet applications such as Excel. Note that this doesn't really force excel open or anything like that, it just presents the content to the client in the best format possible for the client to open it in excel. Application and Epplus opens quickly , by the way my program is winform not web. xlsx"); using (ExcelPackage package = new ExcelPackage(newFile) { ExcelWorksheet ws = package. Open(@”C:\Users\username\Desktop\Northwind. Stack Overflow. xls file with the help of EPPlusPackage and then by code Add your custom sheet in . Below are the code that i used, I've notice that in this case EPPlus is loading all the content of the Excel file I'm using the 3. But, I want to read an Excel file from some path D drive or C drive or Virtual path. However I failed. Opening an Excel file with EPPlus. xlsx documents. 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 . Related questions. XLS you would be better of with EPPlus rather then Interop to create Excel files. EPPlus is a . SaveAs method to make a copy of the template file. Once you've done that, make a duplicate of the file in File Explorer. I am trying to open an Excel document using EPPlus reference/package. Open the duplicate file in Excel, add the feature that you need, save and close. IO. This case are using excel with EPP too. This is done with the help of the EPPlus library. Stream. Then I immediately call this file to run (Excel will open and my file is loaded). This is a great article on codeproject. Use FileInfo and open the file directly with ExcelPackage: Below is my code to read excel file. Excel program will save a more complete XML and whatever else it deems necessary. I have googled, but found nothing useful except the above. Provide details and share your research! But avoid . I read on their site that you can use templates. After insert data, the user could save the file on his computer, I doesn't know Opening Excel using EPPlus. When the user uploads the same file, as the one being exported without editing the file, this long operation occurs. xlsx Created and Saved Using Template with EPPlus is Unreadable/Corrupt. 3. 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. p. Topics Trending Collections Enterprise Enterprise Folders and files. xlsx”); This code will open the Excel file located at `C:\Users\username\Desktop\Northwind. because just open your . They then select the file to upload and this is where it fails. in C#: InterOp; third-party libraries; With interop you are using an excel version that is installed on the machine, with libraries I have a method that creates an excel file and sends it as an email's attachment. xlsx files; it cannot open . I think if you do this, you're less likely to run into trouble reading it from the file system. 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. . cs file: It is loading and it runs through but there are no files created, nothing is opening up. Skip to content. xls"); ExcelPackage pck = new ExcelPackage(newFile); var ws = pck. 1, an exception occurs on using the Worksheets. NET MVC application. Name Name. WriteAllBytes the file is saved I am exporting data in Excel form using EPPLUS Excel Library. net 4. – Meirav Elcharar. EXE. After writing the data into the excel file, I would like to save the Excel workbook. ReadWrite); //1. xml"))) I can open the file with Excel manually. thanks man, was trying so hard to know why epplus is not opening excel, turns out it was xls – Khizar Murad. EPPlus (Excel 2007/2010+) I am a massive fan of EPPlus as its very easy to manipulate . I am using the Open Source EPPlus library which allows you to read Spreadsheet files like Excel. Do you want us to try to recover as much as we can? If you trust the source of this workbook, Click Yes. 1 How to use EPPlus read an Excel 2010 file that has workbook protection? 1 Open Password Protected Workbook with VBA. Why you delete File. 7 . NET 5 Excel File Download exmaples using EPPlus and ClosedXML code - tysongibby/BlazorExcelFileDownload. Excel interacts with all file types it can open the same way. 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#. xlsx format. Create Excel using EPPlus and save it on server folder. This is the first time I have ever used EPPlus and I am I am writing a code in C# MVC using EPPlus. This is what I have so far: When using the "interop" - the code is interacting with the Excel application - the file format/extension doesn't matter. Could anyone provide any help to keep the old data while saving? I have the following function 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. vrex clmin hnckuh vsdno wyfm uehrjis hyiva ixoq zrrvrfi uox