A stream is a way of sequentially accessing a file. A byte stream access the file byte by byte. A byte stream is suitable for any kind of file, however not quite appropriate for text files. For example, if the file is using a unicode encoding and a character is represented with two bytes, the … Read more
You need to reset the position of the stream before copying. outStream.Position = 0; outStream.CopyTo(fileStream); You used the outStream when saving the file using the imageFactory. That function populated the outStream. While populating the outStream the position is set to the end of the populated area. That is so that when you keep on writing … Read more
The FileStream’s Name property. See documentation in MSDN
the easiest way is : static void lineChanger(string newText, string fileName, int line_to_edit) { string[] arrLine = File.ReadAllLines(fileName); arrLine[line_to_edit – 1] = newText; File.WriteAllLines(fileName, arrLine); } usage : lineChanger(“new content for this line” , “sample.text” , 34);
An easy one as an extension method public static class Extensions { public static Stream ConvertToBase64(this Stream stream) { byte[] bytes; using (var memoryStream = new MemoryStream()) { stream.CopyTo(memoryStream); bytes = memoryStream.ToArray(); } string base64 = Convert.ToBase64String(bytes); return new MemoryStream(Encoding.UTF8.GetBytes(base64)); } }
You forgot to Seek: str.CopyTo(data); data.Seek(0, SeekOrigin.Begin); // <– missing line byte[] buf = new byte[data.Length]; data.Read(buf, 0, buf.Length);
You are trying to create a FileStream object for a directory (folder). Specify a file name (e.g. @”D:\test.txt”) and the error will go away. By the way, I would suggest that you use the StreamWriter constructor that takes an Encoding as its second parameter, because otherwise you might be in for an unpleasant surprise when … Read more
The term stream is an abstraction of a construct that allows you to send or receive an unknown number of bytes. The metaphor is a stream of water. You take the data as it comes, or send it as needed. Contrast this to an array, for example, which has a fixed, known length. Examples where … Read more
Use Directory.CreateDirectory: Directory.CreateDirectory Method (String) Creates all directories and subdirectories as specified by path. Example: string fileName = @”C:\Users\SomeUser\My Documents\Foo\Bar\Baz\text1.txt”; Directory.CreateDirectory(Path.GetDirectoryName(fileName)); using (FileStream fs = new FileStream(fileName, FileMode.Create)) { // … } (Path.GetDirectoryName returns the directory part of the file name.)
You need a single stream, opened for both reading and writing. FileStream fileStream = new FileStream( @”c:\words.txt”, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.None);