filestream – Tarik Billa

Read the actual contents of text file using FileStream and these options c#

April 8, 2024 by Tarik

Maybe something like: FileStream fileStream = new FileStream(“[path]”, FileMode.Open, FileAccess.Read, FileShare.Read, 64 * 1024, (FileOptions)0x20000000 | FileOptions.WriteThrough & FileOptions.SequentialScan); string fileContents; using (StreamReader reader = new StreamReader(fileStream)) { fileContents = reader.ReadToEnd(); } bool assignedvariable = Convert.ToBoolean(fileContents); assignedvariable will hold true if the file contains 1 and false if it contains 0. Sorry if this has … Read more

How to create directories automatically using ofstream [duplicate]

January 2, 2024 by Tarik

ofstream never creates directories. In fact, C++ doesn’t provide a standard way to create a directory. Your could use dirname and mkdir on Posix systems, or the Windows equivalents, or Boost.Filesystem. Basically, you should add some code just before the call to ofstream, to ensure that the directory exists by creating it if necessary.

Fastest way to read file length C#

December 31, 2023 by Tarik

The natural way to get the file size in .NET is the FileInfo.Length property you mentioned. I am not sure Stream.Length is slower (it won’t read the whole file anyway), but it’s definitely more natural to use FileInfo instead of a FileStream if you do not plan to read the file. Here’s a small benchmark … Read more

Http MultipartFormDataContent

December 16, 2023 by Tarik

Posting MultipartFormDataContent in C# is simple but may be confusing the first time. Here is the code that works for me when posting a .png .txt etc. // 2. Create the url string url = “https://myurl.com/api/…”; string filename = “myFile.png”; // In my case this is the JSON that will be returned from the post … Read more

Will a using clause close this stream?

December 3, 2023 by Tarik

Yes, StreamReader.Dispose closes the underlying stream (for all public ways of creating one). However, there’s a nicer alternative: using (TextReader reader = File.OpenText(“file.txt”)) { } This has the added benefit that it opens the underlying stream with a hint to Windows that you’ll be accessing it sequentially. Here’s a test app which shows the first … Read more

C equivalent to fstream’s peek

December 1, 2023 by Tarik

fgetc+ungetc. Maybe something like this: int fpeek(FILE *stream) { int c; c = fgetc(stream); ungetc(c, stream); return c; }

stream.CopyTo – file empty. asp.net

November 25, 2023 by Tarik

There is nothing wrong with your code. The fact you say “I’ve checked the stream.Length before copying and its not empty” makes me wonder about the stream position before copying. If you’ve already consumed the source stream once then although the stream isn’t zero length, its position may be at the end of the stream … Read more

Saving openpyxl file via text and filestream

July 28, 2023 by Tarik

In openpyxl 2.6 calling the save_virtual_workbook method issues the following warning: DeprecationWarning: Call to deprecated function save_virtual_workbook (Use a NamedTemporaryFile). At some point save_virtual_workbook will be removed from openpyxl. In Python 3 typical usage to save an openpyxl workbook to a filestream becomes: from io import BytesIO from tempfile import NamedTemporaryFile from openpyxl import Workbook … Read more

FILESTREAM feature is disabled

July 18, 2023 by Tarik

I was unable to script this, (using the link provided by user1977061), as the MSSQLService requires a restart afterwards to apply the change. Even after doing this it didn’t work, and instead I had to manually configure FILESTREAM usage via: SqlServer Configuration Manager Sql SQL Server Services SQL Server(MSSQLSERVER) [Properties] FILESTREAM tab – enable the … Read more

Easiest way to read text file which is locked by another application

May 27, 2023 by Tarik

I think you just want the following: using (var fileStream = new FileStream(“foo.bar”, FileMode.Open, FileAccess.Read, FileShare.ReadWrite)) using (var textReader = new StreamReader(fileStream)) { var content = textReader.ReadToEnd(); } The FileAccess.Read parameter is what is important, to indicate that you only want to read the file. Of course, even to do this, the file must have … Read more