ASP.NET Minimal API How to Return/Download Files
Jan 4, 2023 · Program.cs var fileName = @"C:\Users\Jano\Documents\words.txt"; using FileStream fs = File.Create (fileName); using var sr = new StreamWriter (fs); sr.WriteLine ("coin\nfalcon\nhawk\nforest"); Console.WriteLine ("done"); ...read more
csv - C# download file from filestream - Stack Overflow
Jun 21, 2022 · 1 Answer Sorted by: 1 var i = 1; foreach (var chunk in result.Chunk (1000)) using var fileStream = new FileStream ($"/static/export i++.csv", FileMode.Create, FileAccess.Write); using var streamWriter = new StreamWriter (fileStream); var writer = new CsvWriter (streamWriter , config); // logic for writing records with CsvHelper Share ...read more
c# - .NET Asynchronous stream read/write - Stack Overflow
dt.WriteXml(stream); stream.Seek(0, SeekOrigin.Begin); File.WriteAllBytes("c:\test.xml", stream.GetBuffer()); See if you have a valid XML file out. If you do then move on do the same with your ZipFile. Save it to a local file. See if it's there, has your xml file and your xml file has content in it. ...read more
FileStream Class (System.IO) | Microsoft Learn
Jun 28, 2015 · This has a minor inefficiency in creating a buffer on each invocation - you might want to create the buffer once and pass that into the method as well: public static void CopySection (Stream input, string targetFile, int length, byte [] buffer) { using (Stream output = File.OpenWrite (targetFile)) { int bytesRead = 1; // This will finish ...read more
How to Master the Filestream in C# | Okta Developer
Sep 15, 2021 · In this article. File and stream I/O (input/output) refers to the transfer of data either to or from a storage medium. In .NET, the System.IO namespaces contain types that enable reading and writing, both synchronously and asynchronously, on data streams and files. These namespaces also contain types that perform compression and ...read more
c# - What is the best memory buffer size to allocate to download a file
Aug 12, 2022 · In this article. Example 1: Create and extract a .zip file. Example 2: Extract specific file extensions. Example 3: Add a file to an existing .zip file. Example 4: Compress and decompress .gz files. See also. The System.IO.Compression namespace contains the following classes for compressing and decompressing files and streams. ...read more
How to: Compress and extract files | Microsoft Learn
c# .net c#-4.0 ftp ftpwebrequest Share Improve this question Follow edited Jan 19, 2022 at 18:31 Martin Prikryl 187k 54 480 968 asked Sep 20, 2012 at 19:09 Rick Eyre 2,335 4 20 26 Add a comment 2 Answers Sorted by: 26 Just figured it out: ...read more
Improve Stream Reading Performance in C# - CodeProject
Approach consists of few simple basic steps: acquire the file size by making http request with HEAD method calculate the size of chunks based on desired number of parallel downloads initiate download of each chunk in parallel and save to a separate file merge all chunk files in a single final file delete all temporary files ...read more
How to write super-fast file-streaming code in C#?
Oct 29, 2019 · You can call the Write method multiple times, which makes this a good choice when needing to iterate over something like database records and write each record to the same file. Using FileStream is typically faster than the methods from the last two examples. When storing the data generated for this post, using the FileStream is around 20% ...read more
c# - Using Web API to download a file - Stack Overflow
May 23, 2023 · You can use either of the following methods: OpenRead OpenReadAsync Download to a file path ...read more
C# Download big file from Server with less memory consumption
Apr 29, 2020 · Let’s take a moment to break down what is going on. var file = "Hello\n.NET\nStreams"; var fileBytes = Encoding.UTF8.GetBytes(file); var requestStream = new MemoryStream(fileBytes); First, we need some bytes to work with. When working with files, those bytes are stored in your storage media. ...read more
Visual Studio 2022 17.7 Preview 2 is here! - Visual Studio Blog
Jun 18, 2023 · Using Web API to download a file. I took the Web API template and made slight change to working endpoint for the download. [HttpGet (Name = "GetWeatherForecast")] public FileStream Get () { var path = @"C:\Users\user1\download.msi"; return new FileStream (path, FileMode.Open, ...read more
c# - Creating Zip file from stream and downloading it - Stack Overflow
Jan 22, 2016 · private static void Test2 ( string file) { var s = new Stopwatch (); // Open the file for reading. using ( var stream = File.OpenRead (file)) { long hash = 0 ; long position = 0 ; byte [] buffer = new byte [N]; int count; s.Start (); // Read a couple of bytes from the stream. while ( (count = stream.Read (buffer, 0, N)) > 0 ) { hash += C ...read more
c# - Downloading files using FtpWebRequest - Stack Overflow
Jul 11, 2010 · System.IO.FileStream is super slow on huge files Ask Question Asked 12 years, 11 months ago Modified 9 years, 6 months ago Viewed 12k times 13 I have a piece of code that needs to be able to modify a few bytes towards the end of a file. The problem is that the files are huge. Up to 100+ Gb. ...read more
ASP.NET Core Blazor file downloads | Microsoft Learn
If a process terminates with part of a file locked or closes a file that has outstanding locks, the behavior is undefined. For directory operations and other file operations, see the File, Directory, and Path classes. The File class is a utility class that has static methods primarily for the creation of FileStream objects based on file paths. The MemoryStream class ...read more
How to write to a file with C# (without Stack Overflow) - elmah.io
Jan 19, 2022 · Is there a faster way to read bytes with a FileStream? Ask Question Asked 1 year, 5 months ago Modified 1 year, 5 months ago Viewed 771 times 0 So I'm trying to read data and store it in an array as fast as possible and the fastest method I ...read more
How to download files using C# - Jonathan Crozier
I have been trying to solve this "Concurrent Programming" exam exercise (in C#): Knowing that Stream class contains int Read(byte[] buffer, int offset, int size) and void Write(byte[] buffer, int offset, int size) methods, implement in C# the NetToFile method that copies all data received from NetworkStream net instance to the FileStream file instance. To do ...read more
C# FileStream - read & write files in C# with FileStream - ZetCode
May 5, 2017 · Using this method means you don't have to load the file/bytes in memory before serving. public FileResult Download () var filePath = "file path in server"; return new FilePathResult (Server.MapPath (filePath), "application/zip"); Edit: For larger files FilePathResult will also fail. Your best bet is probably Response.TransmitFile () then. ...read more
c# - System.IO.FileStream is super slow on huge files - Stack Overflow
Dec 12, 2014 · Stream remoteStream; Stream localStream; WebResponse response; try { response = request.EndGetResponse (result); if (response == null) return; remoteStream = response.GetResponseStream (); var localFile = Path.Combine (FileManager.GetFolderContent (), TaskResult.ContentItem.FileName); localStream = ...read more
c# - Download file from filestream - Stack Overflow
Apr 3, 2023 · Download a file via a URL without streaming: Usually, this approach is used for relatively large files (> 250 MB). When downloading files from a different origin than the app, Cross-Origin Resource Sharing (CORS) considerations apply. For more information, see the Cross-Origin Resource Sharing (CORS) section. Security considerations ...read more
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