Cannot access a closed file filestream c#

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August undefined, 2024

WebJan 22, 2024 · Or you could just reopen the filestream again, or maybe return a File Instance from your method that you could reopen the stream with Now that you shared your full code, it seems to me that your Write call is disposing the FileStream or closing it, you can try reopen the filestream just after you do the Write () call. Share Improve this answer WebOct 16, 2024 · You are trying to read/write to a stream that is already closed / disposed. private FileResult createZipFromXmlImport (ImportBase import, string fileName) { var …

IFormFile.OpenReadStream C# (CSharp) Code Examples

WebThe same applies to all File functions that don't return a handle to the file you're working with: File.ReadAllText(), File.WriteAllText(), File.ReadAllLines(), File.WriteAllLines() and … WebMar 22, 2024 · That been said, if the file was not closed, you would merely have a different exception. During. PdfReader pdfReader = new PdfReader (pdfStream); the stream is read to the end, so here. var image = iTextSharp.text.Image.GetInstance (pdfStream); there would be nothing to read from the stream. And even if you did reset the stream to the … small start up biotech companies

c# - HttpContent.CopyToAsync for large files - Stack Overflow

WebApr 26, 2024 · Code that I tried to end the Stream after returning FileStreamResult, I am aware that it can not work, because after return File (stream, contentType, fileName) it immediately jumps to the block finally and the stream closes, so the download does not start because the stream is closed c# asp.net-core orchardcore Share Improve this question … WebJun 22, 2015 · The issue boils down to the fact that you're trying to use an MVC component with a stream that won't exist outside the lifetime of your action. The controller infrastructure will ensure the stream is closed automatically for you so you shouldn't dispose of the stream. Michael Taylor http://blogs.msmvps.com/p3net /// Method that gets called by ManagedResource.WriteData() in project CodeAnalysis during code /// emitting to get the data for an embedded resource file. highway auto sales portville ny

Cannot access closed file during Reading/Writing operation - C#

c# - IFormFile copy to memorystream ObjectDisposedException

WebAug 20, 2024 · FileStreamResult will dispose memoryStream for you. The reason that your code doesn't work is that the actual work that reads from memoryStream is not in your code - it is in MVC code that calls fileStream.WriteFile. But that code is executed somewhere higher up the call stack. WebTwo thoughts: Regarding FileShare statement that additional permissions might still be needed - that's likely in reference tha while your program says it can handle someone … small start up business grants for women highway auto wreckers bundaberg

"WebApr 22, 2024 · In my C# api I am returning a pdf file in a FileStreamResult, works great. Generally I wrap streams in using, however this code fails with Cannot access a closed Stream. using (MemoryStream stream = new MemoryStream (byteArray)) { fileStreamResult = new FileStreamResult (stream, "application/pdf"); } return (ActionResult)fileStreamResult; " - Cannot access a closed file filestream c#

Cannot access a closed file filestream c#

c# - File-Stream is being used by another process - Stack Overflow

WebNov 1, 2011 · Im using Taglib to change some tags in memory, what Im trying to do is read a file using a stream, copy the stream to a memoryStream make some changes i.e. (file.Tag.Comment = "my New comments"), and then use the lastest stream for download. WebMar 22, 2012 · both of the followiong lines of code are separate objects trying to access the same file: FileStream f1=new FileStream("c:\\file.xml",FileMode.Open); StreamReader sr=new StreamReader("c:\\file.xml"); so each is attempting to access teh file indivodually, whereas changing your code to my connection cases sr to access the file Through f1

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WebC# (CSharp) IFormFile.OpenReadStream - 60 examples found. These are the top rated real world C# (CSharp) examples of IFormFile.OpenReadStream extracted from open source projects. You can rate examples to help us improve the quality of examples. WebDec 1, 2016 · int fileLength = attFile.ContentLength; byte [] byteContent = new byte [fileLength]; attFile.InputStream.Read (byteContent, 0, iLength); using (var memStream = new MemoryStream (byteContent)) { System.IO.File.WriteAllBytes (server.MapPath (location + fileName), memStream .ToArray ()); } Share Follow edited Nov 24, 2016 at 9:09

WebJul 6, 2013 · private FileStreamResult Export () { string name = "filename.txt"; MemoryStream stream = new MemoryStream (); using (StreamWriter writer = new StreamWriter (stream)) { StringBuilder sb = new StringBuilder (); sb.Append ("A text..."); writer.WriteLine (sb.ToString ()); } return File (stream, "text/plain", name); } UPDATE … WebJun 26, 2012 · The stream could have been closed outside of this code and this exception would still occur? Yes. For example - This can happen if you wrap a stream within another stream, and dispose of the "wrapper" stream. Many implementations dispose of the stream they are wrapping.

WebThis happens because the StreamReader takes over 'ownership' of the stream. In other words, it makes itself responsible for closing the source stream. As soon as your program calls Dispose or Close (leaving the using statement scope in your case) then it will dispose the source stream as well. Calling fs.Dispose() in your case. So the file stream is dead … WebHere's an example of the problem of a memory stream getting closed despite your desire to continue using it: ///

WebApr 13, 2015 · You might be closing the stream before doing anything with it. What happens when you run this: using (fileStream = new FileStream (path, FileMode.Append, FileAccess.Write)) { fileWriter = new StreamWriter (fileStream); fileWriter.AutoFlush = …

WebJul 6, 2024 · The ending curly brace of your using statement closes the file stream: using (fileStream) { Attachment attachment = new Attachment (fileStream, filePath); mailMessage.Attachments.Add (attachment); } // <-- file stream is closed here However, the stream is read at the time of the stmpClient.Send (mailMessage), where it is not open … small start up business in the philippinesWebJun 14, 2024 · 2 Answers Sorted by: 4 Your running into a race condition due to your usage of async void. Due to the void return type, the server code running your app can not know when your method finishes and disposes the request immediately. Use Task as the return type of your UploadFile method. small start up business from homeWebC# : Cannot access a closed Stream while creating a downloadable text file in ASP MVC 3To Access My Live Chat Page, On Google, Search for "hows tech develope... highway auto supply rosevilleWebMar 5, 2024 · Apparently ASP.Net buffers the first chunk of the input stream, then treats the stream as closed. This can happen if you set MaxRequestLength (say, 1536) but let RequestLengthDiskThreshold default. This apparently trips over some internal code, which makes it a Microsoft bug. small start up business loans for womenWebClose the file: If you are the one who opened the file, you can close it to release the lock. Make sure that you call the Close method on the file object after you finish reading or writing it. using (var file = new FileStream("filename", FileMode.Open)) { // read or write the file here file.Close(); // release the lock } highway auto wrecking prosserWebAug 17, 2024 · I looked to see where the stream is being closed and its at the closing tag for the using, so i tried moving the return above the tag but this did not work either C#: private MemoryStream BuildRootZip() { MemoryStream ReturnMemoryStream = new MemoryStream(); using (ReturnMemoryStream) { } } small start up companiesWebJan 7, 2024 · I'm getting Cannot Access a closed file on some files when I try to upload them. I'm creating a small web app, when a user creates an account on the website, they are required to upload a file. Once they have uploaded the file, I should see it in MongoDB. The issue is some files are uploaded successfully while others create errors. small start up business loan bad credit