filestream

问题 In my experiments with the following code snippet, I did not find any particular difference whether i created the streams with/without the ios:binary mode: int main() { ifstream ostr("Main.cpp", ios::in | ios::binary | ios::ate); if (ostr.is_open()) { int size = ostr.tellg(); char * memBlock = new char[size + 1]; ostr.seekg(0, ios::beg); ostr.read(memBlock, size); memBlock[size] = '\0'; ofstream file("trip.cpp", ios::out | ios::binary); file.write(memBlock, size); ostr.close(); } } Here I am

问题 I understand that .NET FileStream's Flush method only writes the current buffer to disk, but dependent on Windows' disk driver and the hard disk firmware this is no guarantee that the data is actually physically written to disk. Is there a .NET or Win32 method that can give me this guarantee? So if there is power loss one nanosecond after the call to this method comes back, I can still be sure that everything is OK? 回答1: Under Windows, look at FlushFileBuffers (Win32 API). 回答2: Stefan S. said

问题 Can anybody have any idea how to read a binary file which resides in sdcard using Streams, like Inputstream , CountingInputStream or SwappedDataInputStream ? I am using these three streams to read a file which is currently in the Resources folder , but now I want to move that file in sdcard but I cannot change these stream because I have done so much work on it and I cannot roll back my work. I am doing it this way but its giving me FileNotFoundException . I need your help please.

问题 Right now by code looks like the following: private void DatabaseIntegrityCheck() { try { string m_checksum; using (FileStream stream = File.OpenRead(@"C:\~\db.mdf")) { SHA256Managed sha = new SHA256Managed(); byte[] checksum = sha.ComputeHash(stream); m_checksum = BitConverter.ToString(checksum).Replace("-", String.Empty); } Console.WriteLine(m_checksum); } catch (Exception ex) { Console.WriteLine("unable to retrieve checksum"); } } When I set a breakpoint in my code to see what the

问题 So for a project I am creating Résumé's and i need to save them into a docx file. It is a ASP.NET MVC application and for the docx generating I'm using the libray docx to create the document. I can create the file but the filestream doesn't add the content i put into it. Here is a the code i use public ActionResult CVToWord(int id) { var CV = CVDAO.CV.Single(cv => cv.id == id); var filename = "CV - " + CV.firstname + " " + CV.name + " - " + CV.creationdate.ToString("dd MM yyyy") + ".docx";

问题 This question already has answers here : Understanding garbage collection in .NET (3 answers) Closed 4 years ago . I have the following class. public class Foo { private string _DirName; private FileStream _MyfileStream; public FileStream MyfileStream { get { return _MyfileStream; } } public string DirName { get { return _DirName; } set { _DirName = value; _MyfileStream = new FileStream(value, FileMode.Create); } } } I have Created a List Of Foo as like the following: List<Foo> FooList = new

问题 I am working with TFileStream in Delphi 2006. When I invoke TFileStream.Seek with an offset that is out of bounds I am getting different return values. When I seek to a position below the beginning of the stream, the function returns -1 and if I seek to a beyond the stream size, the function returns what would have been the position in the stream if the stream was that large. Is there a way to check whether a seek operation on the stream was successful? Why does TFileStream.Seek not fail when

问题 This is basically a yes/no question, but it is appreciated if the answer includes supporting references and a how-to if the answer is "yes". Strangely, I couldn't find a definitive answer in MSDN or TechNet, and my instincts and experiments lead me to a "no" conclusion. Is it possible to use Windows EFS with SQL Server 2012's FILESTREAMS and FileTables and have Full Text Search work on those FILESTREAMS? TIA Additional Detail I have a Visual Studio SQL Project created that stamps out DBs with

问题 In an Visual Studio environment, Project A (ASP.NET) references Project B (C#) in my solution like this: Solution ├─Project B │ ├─data.txt │ └─process.cs (a class BB with static initialization new FileStream("data.txt")) └ Project A (referencces Project B) ├─bin │ └─data.txt (copied from project B each time project B changes) └─Controllers └─mycontroller.cs (references the class BB) The problem is that when I run the application, the working directory is C:\Program Files (x86)\IIS Express\ ,

问题 I have a list of Xml messages specifically DataContract messages that i record to a file. And i am trying to deserialize them from file one by one. I do not want to read the whole file into memory at once because i expect it to be very big. I have an implementation of this serialization and that works. I did this by serializing using a FileStream and reading the bytes and using regular expression to determine the end of element. Then taking the element and using DataContractSerializer to get