Sample C# //when using this method, put StringToStream in a using construct public static Stream StringToStream(string input, Encoding enc) { var memoryStream = new MemoryStream(); var streamWriter = new StreamWriter(memoryStream,enc); streamWriter.Write(input); Download ExcelDLL.zip - 6 KB; Download Excel.zip - 12.3 KB; Introduction. The resultant JSON files can be bound to any control in any platform. To Convert String to Stream in C# and VB.NET you can use the following snippet. I just write a simple example to show you how you can name the file, the worksheet and select cells: var workbook = new XLWorkbook(); workbook.AddWorksheet("sheetName"); var ws = workbook.Worksheet("sheetName"); int row = 1; foreach (object item in itemList) { ws.Cell("A" + The following function give shows how this can be done. If you dont need control over formatting, styles, or workbook structure, only need data in excel, this approach is good for you. I am writing a program to attach a file to email. Java use -and _ in base64 string, and C# use + and /. Since 1.22.0, when value type is byte[] then system will save file path at cell by default, and when import system can be converted to byte[].And if you don't want to use it, you can set OpenXmlConfiguration.EnableConvertByteArray to false, it can improve the system efficiency.. Input webpage with HTML table. I want to export a data table to an Excel file with EPPlus. Microsoft PDF add-in for word seems to be the best solution for now but you should take into consideration that it does not convert all word documents correctly to pdf and in some cases you will see huge difference between the word and the output pdf. Using your code, I tried to save my data in an excel file. 2.2.2 License.lic, Copy to Ouput Directory Copy always 2.3 Execl To add a new worksheet to the workbook use this code: var xlSheets = xlWorkBook.Sheets as Excel.Sheets; var xlNewSheet = (Excel.Worksheet)xlSheets.Add(xlSheets[1], Type.Missing, Type.Missing, Type.Missing); xlNewSheet.Name = "newsheet"; // Uncomment a line below if you want the inserted sheet to be Fill Data To Excel Template . I wanted to generate PDF files from HTML strings. The start row and column must string path = @"C:\test.txt"; File.WriteAllLines(path, GetLines()); byte[] bytes = System.IO.File.ReadAllBytes(path); I have created an HttpGet in my Server-API which creates a CSV-File and returns it with FileStreamResult: [HttpGet] public IActionResult Get() { // do logic to create csv in memoryStream return new FileStreamResult(memoryStream, "text/csv;charset=utf-8") { FileDownloadName = "products.csv", }; } The declaration is similar to Vue Let's begin with our first file, AbstractDataExport.cs. This article demonstrates how to export functionality with different types of file formats like excel, pdf, word, csv, json, xml and text files using a .net MVC application. public static byte[] GetBytesFromStream(Stream input) { using (MemoryStream ms = new MemoryStream()) { input.CopyTo(ms); return ms.ToArray(); } } Professional provider of PDF & Microsoft Word and Excel document editing and modifying solutions, available for ASP.NET AJAX, Silverlight, Windows Forms as well as WPF. And I have Used This To Convert The Pdf File Into Byte Array: FileUpload1.SaveAs(filePathName); byte[] picArray= System.IO.File.ReadAllBytes(filePathName); MemoryStream ms = new MemoryStream(pdfBytearray); How o convert byte array any to its original file when downloading the ant type of file like pdf, excel, png, jpg like that. For example, when we send the file type as PDF, service will return PDF file if we send Doc, service will return Word document. var body = yourReadOnlyMemoryBytes.Body.Span; var text = Encoding.UTF8.GetString(body); Professional provider of PDF & Microsoft Word and Excel document editing and modifying solutions, available for ASP.NET AJAX, Silverlight, Windows Forms as well as WPF. // export DataTable to excel // save excel file without ever making it visible if filepath is given // don't save excel file, just make it visible if no filepath is given dt.ExportToExcel(ExcelFilePath); Extension method for DataTable class: System.Net.Mail.MailMessage.Attachments.Add( new System.Net.Mail.Attachment("file name")); I do not want to store file in disk, I want to store file in memory and from memory stream pass this to Attachment. The elapsed time is written out to the console with tab formatting so you can pipe it to a file for easier viewing in an Excel spreadsheet. Convert Required file into Bytes How to Convert File to base64 string in C#. Convert List to string in C# (Comma-separated, New-Line) Understanding ASP.NET Gridview control with an example. Step 3: Create an Excel document in the controller class ExportHtmlTableController.cs. To send the file to REST service, we have to follow the below steps. I then came across PhantomJs which is a command line utility for converting html files to pdf. Then, convert the HTML string into a stream and load it using the ImportHtmlTable method, then export it to an Excel worksheet. You can convert all foramt of files to a base64 string, here we use PDF image file for example. Convert String to List in C# and string array to list. Read Excel file and import data into GridView using Datatable in ASP.NET. After adding Microsoft.EntityFrameworkCore.SqlServer to project next, we are going to Configuring Connection string in appsettings.json.. Configuring Connection string in appsettings.json. I have implemented the most frequently used file format to export data in real time projects. We cannot send the file from its original state. I wrote a cross-platform wrapper over it in C# for .NET CORE and its working great on Linux! Given some data in the database or any other data storage, you will be asked to create an Excel file with the data and present the Excel file to the users; Given an Excel file, you will be asked to read the data and process it in your program. Here are a few of the popular ones that I like: Using ClosedXML edit library( there is no need to install MS Excel. Below is the method where I convert the data from memory stream. Syncfusion Excel (XlsIO) Library is a .NET Excel library that allows users to convert Excel documents to various file formats such as PDF, image, HTML, ODS, and JSON.Among them, the Excel-to-JSON conversion is supported from the 18.3 version onward. The following seems to render the gridview into my View, instead of prompting the user to open with Excel, which I The first step in this example is to query the data out of the database and put it into a MemoryStream. To convert Generic data to TSV (Tab Separated Values) Format, use following method: When I click the save button of the dialog, I can save the excel file on the client machine in the "Microsoft Office Excel worksheet" format. These encodings are registered by default in the full .NET Framework, but not on .NET Core. Assuming you mean that you want to take an image file (JPEG, BMP, TIFF, etc) and crop it then save it out as a smaller image file, I suggest using a third party tool that has a .NET API. This is required to parse strings in binary BIFF2-5 Excel documents encoded with DOS-era code pages. private MemoryStream GetData() {//Create the return memorystream object that will hold //the buffered data. The upside is that you can convert to and from JSON easily. Many times, there can be a need of exporting your HTML table into excel (.xlsx) file while creating ASP.NET MVC application, and there are multiple ways for exporting to excel in C# MVC, one of the most common methods is to use Excel PIA (primary interop assemblies) but it is not recommended method as you would have to install Microsoft Office suite on your web Creating a New Excel object - _workbook = new XSSFWorkbook(); Creating a New Excel Sheet object - _sheet = _workbook.CreateSheet(_sheetName); Invokes WriteData() - explained later; Finally, creating and returning MemoryStream object Use Span property to convert message to string without additional memory allocation. byte[] bytes = File.ReadAllBytes(@"c:\sample.pdf"); string base64Str = Convert.ToBase64String(bytes); How to decode Java encoded Base64 string in C#. (I have taken this sample to cover all types of files). Using CSV/TSV content and save it to a file with a .xls extension. I was having the same issue! (1000 times). Here in ASP.NET core, we dont have web.config file which was there in the older version of ASP.NET and ASP.NET MVC here we have appsettings.json file where we are I tried replacing the StringBuiler with a MemoryStream but it was too slow (100% slower). 11. Step 4: The HTML string parsed into the hidden field is now passed to the click event. The idea is to Export the application data to an Excel file (On clients machine) and then Import the same Excel file data in my Application. That data table has a property with int type, so I want the same format in the Excel file. Byte Array File Export. How can I create a .csv file implicitly/automatically by using the correct method, add text to that file existing in memory and then convert to in memory data to a byte array? I am having trouble exporting data to Excel. Unfortunately I couldn't find any api that would convert all word documents correctly. Our customers often have to import data from very simple Excel *.xslx-files into our software product: with some relevant rows and cells in rather primitive worksheets of an Excel workbook, and that's it. Currently I am saving file using FileStream into disk, and then I use . Connect to Oracle Database in C# (ASP.NET Web-Forms Example) Understanding session state in asp.net
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