filestream

问题 I am trying to work with FileStream.Seek to quickly jump to a line and read it. However, I am not getting the right results. I have tried to look at this for a while and can't understand what I am doing wrong. Environment: OS: Windows 7 Framework: .NET 4.0 IDE: Visual C# Express 2010 Sample Data in file location: C:\Temp\Temp.txt 0001|100!2500 0002|100!2500 0003|100!2500 0004|100!2500 0005|100!2500 0006|100!2500 0007|100!2500 0008|100!2500 0009|100!2500 0010|100!2500 The code: class

问题 I'm quite new to C# so please bear with me. I'm reading (using FileStream) data (fixed size) to small array, process the data and then read again and so on to the end of file. I thought about using something like this: byte[] data = new byte[30]; int numBytesToRead = (int)fStream.Length; int offset = 0; //reading while (numBytesToRead > 0) { fStream.Read(data, offset, 30); offset += 30; numBytesToRead -= 30; //do something with the data } But I checked documentation and their examples and

问题 This question already has answers here : empty path name not legal (2 answers) Closed 6 years ago . So I'm trying to compile an Asteroids game. It's almost working, all the files are in place etc etc... The issue comes when it hits this code. FileStream myFileStream = new FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.Read); string myTempFile = @"F:\Documents\Junior School\Computer Programming (Java 1)\AsteroidsWithSound\AsteroidsWithSound\temp\mysound" + i.ToString() + ".wav"

问题 I have, essentially, the same problem as this poster, but in C#: Waiting until a file is available for reading with Win32 More information: we have code that calls File.Open in one of our projects, that occasionally dies when the file is already opened by another process ( EDIT: or thread): FileStream stream = File.Open(m_fileName, m_mode, m_access); /* do stream-type-stuff */ stream.Close(); File.Open will throw an IOException (which is currently quietly swallowed somewhere), whose HResult

问题 I have a filesystemwatcher that will trigger an event when a file is modified. I want to read from that file once the lock has been removed. At the moment I am just trying to open the file once the event is triggered, when A large file is being copied the file lock stays on for a while after the events have been sent, preventing the file from being opened for read access. Any suggestions? 回答1: This one's actually a bit of a doozie, unless the problem space has changed significantly since I

问题 var fs = new FileStream(filePath, FileMode.OpenOrCreate, FileAccess.ReadWrite); using(var writer = new StreamWriter(fs)) writer.Write(....); If the file previously contained text and the newly-written text is shorter than what was already in the file, how do I make sure that the obsolete trailing content in the file is truncated? Note that opening the file in truncate mode isn't an option in this case. The file is already open when I receive the FileStream object. The above code is just to

问题 In my application I use FileStream to read from a file, that is on the fileshare somewhere in the network. So my remoteFilePath variable is something like: \\computername\folder\file.pdf FileStream fileStream = new FileStream(remoteFilePath, FileMode.Open, FileAccess.Read, FileShare.None, 1024 * 1024) Unfortunately, the user that I'm running this application with (that I'm logged into the PC with) does not have access to this fileshare. I have another user (domain, login & password), that has

问题 I've been using File.ReadAllText() to open a CSV file, but every time I forget to close the file in Excel, the application throws an exception because it can't get access to the file. (Seems crazy to me, I mean the READ in ReadAllText seems pretty clear) I know that there is File.Open with all the bells and whistles, but is there an 'intermediate' method which doesn't involve messing around with buffers and char arrays? 回答1: I think you just want the following: using (var fileStream = new

问题 I want to send a binary file to .net c# component in the following xml format <BinaryFileString fileType='pdf'> <!--binary file data string here--> </BinaryFileString> In the called component I will use the above xml string and convert the binary string received within the BinaryFileString tag, into a file as specified by the filetype='' attribute. The file type could be doc/pdf/xls/rtf I have the code in the calling application to get out the bytes from the file to be sent. How do I prepare

问题 How do I launch a PDF Programmatically from a C# application in it's own process? Originally: I want to open PDF file when i click button in C#.Net? 回答1: I assume you just want to open the file. Try the following System.Diagnostics.Process.Start(@"c:\file.pdf"); 回答2: What do you mean for "open PDF file"? If you need to read all byties more simple method is: byte[] byteArray = System.IO.File.ReadAllBytes(@"c:\file.pdf"); If you want display its on WinForm - look that 回答3: to give the third