2024 Cannot access a closed file filestream c#

Cannot access a closed file filestream c#

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August undefined, 2024

WebMay 31, 2015 · The problem is, that when the code reaches the R.Write (Nrows);, it throws the ObjectDisposedException and says that it cannot access a closed file. What is causing the file to be closed at this point? And how can I prevent the file from closing? The same problem occurs while reading as reading uses the same pattern as writing. c# exception 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;

c# - Cannot access a closed Stream while creating a …

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 WebC# : 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... lithonia lighting photometric

c# - cannot access closed file itextsharp - Stack Overflow

WebHere's an example of the problem of a memory stream getting closed despite your desire to continue using it: /// WebThis is how I am reading the file: public string addDocument (HttpPostedFile file, string typeOfDocument, int UserID, string documentID = "", int uploadedBy = 0) { Stream stream; BinaryReader bReader; byte [] bytes; stream = file.InputStream; bReader = new BinaryReader (stream); bytes = bReader.ReadBytes ( (int)stream.Length); } lithonia lighting power pack

c# - Cannot access a closed Stream of a memoryStream, how to reopen ...

c# - System.ObjectDisposedException: Cannot access a closed …

WebDec 22, 2011 · CodeProject, 20 Bay Street, 11th Floor Toronto, Ontario, Canada M5J 2N8 +1 (416) 849-8900 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 … imyfone_full_backupWebAug 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) { } } imyfone full backup

"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. " - Cannot access a closed file filestream c#

Cannot access a closed file filestream c#

c# - ASP.NET FileUpload Cannot access a closed file - Stack Overflow

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 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.

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/// Method that gets called by ManagedResource.WriteData() in project CodeAnalysis during code /// emitting to get the data for an embedded resource file. WebDec 6, 2016 · With the same exception for other members of FileStream. When I dig further into these exceptions, I see: base {System.InvalidOperationException} = {"Cannot access a closed file."} As the message. What does this mean? I'm assuming this is preventing me from reading from this file. Is there any way around this? Why would it work for XLS but …

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 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 …

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 … 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 = …

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, 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 … imyfone goodWebJul 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 … imyfone gps androidWebC# (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. imyfone full downloadWebClose 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 } imyfone ibypasser iphone 11WebC# , Issue with writing HTTP content into FileStream, Cannot access a closed file 1 .NET Core API saving image upload asynchronously with ImageSharp, MemoryStream and FileStream imyfone ibypasser download for windows 10WebDec 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 imyfone ibypasser email and password registerWebJan 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. imyfone ibypasser reddit