2024 Cannot access a closed file filestream c#

Cannot access a closed file filestream c#

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August undefined, 2024

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, 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 …

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

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; WebJan 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. sandport way

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

WebJun 19, 2024 · The issue is, either the client needs to close the stream, or the PushStreamContent needs to close it when all bytes have been written, but with the using block, you're closing it immediately when you send. Share Improve this answer Follow answered Jun 19, 2024 at 10:36 Clay 4,979 1 30 45 Add a comment 0 Removing the … 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 … sand porcelan tile hard

IFormFile.OpenReadStream C# (CSharp) Code Examples

c# - Cannot access closed file System.ObjectDisposedException …

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 … WebAug 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) { } } s and p oscillator indexWebApr 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 … sand porcelain tub

"/// Method that gets called by ManagedResource.WriteData() in project CodeAnalysis during code /// emitting to get the data for an embedded resource file. " - Cannot access a closed file filestream c#

Cannot access a closed file filestream c#

c# - Cannot read XLSX file - Exception with Stream "Cannot access ...

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. 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 …

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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); } 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 …

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 … WebHere's an example of the problem of a memory stream getting closed despite your desire to continue using it: ///

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. 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.

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

WebJan 8, 2024 · // Check if the file is valid. if (!Check (file.FileName, file.ContentType)) return BadRequest ("Fil ikke gyldig"); var medie = new Medie { Name = file.FileName.Trim ('\"'), ParentId = _imageService.TempFolderGuid, ContentLength = file.Length, Content = memoryStream.ToArray () }; try { var imageId = await … s and poor 500WebAug 22, 2011 · the exception happens because AddEntry uses the FileStram and after it is finished with the FileStream it closes it automatically.. so it is closed during Save after the first file... when there is one file it is ok - but your code adds the same FileStream fs for every file... not sure that this is what you really want... I think you would want to open … shoreline area weatherWebDec 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 s and p outfitters 10/22 walnut stockWebDec 22, 2011 · CodeProject, 20 Bay Street, 11th Floor Toronto, Ontario, Canada M5J 2N8 +1 (416) 849-8900 sandport bathroomsWebC# : 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... sand porosity percentageWebClose 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 } shoreline armoring puget soundWebC# (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. sandport edinburgh