Cannot access a closed file filestream c#
WebClose 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 } WebHere's an example of the problem of a memory stream getting closed despite your desire to continue using it: ///
Cannot access a closed file filestream c#
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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) { } } /// 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 … 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
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. 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 …
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 …
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; imaging tools in life scienceWebMay 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 imaging tools for plant nanobiotechnologyWebDec 22, 2011 · CodeProject, 20 Bay Street, 11th Floor Toronto, Ontario, Canada M5J 2N8 +1 (416) 849-8900 imaging to look for infectionWebJul 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 … imaging tools for windowsWebAug 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 … imaging torrington ctWebApr 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 = … imaging toner cartridgeWebMar 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 imaging tools support