filestream

I am facing an issue on client system. On trying to reproduce it in a sample code I have reproduced it. Here's the sample code Imports System.IO Public Class Form1 Private _lock As New Object Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim t As New Threading.Thread(AddressOf createFile) With t .IsBackground = True .Name = Guid.NewGuid.ToString .Start() End With End Sub Private Sub createFile() Dim path As String = "D:\SomeFile.txt" For i As Integer = 0 To 1000 SyncLock _lock If File.Exists(path) Then File.Delete(path) Using fs As

I have this resource file which I need to process, wich packs a set of files. First, the resource file lists all the files contained within, plus some other data, such as in this struct: struct FileEntry{ byte Value1; char Filename[12]; byte Value2; byte FileOffset[3]; float whatever; } So I would need to read blocks exactly this size. I am using the Read function from FileStream, but how can I specify the size of the struct? I used: int sizeToRead = Marshal.SizeOf(typeof(Header)); and then pass this value to Read, but then I can only read a set of byte[] which I do not know how to convert

So me and my groupmates suddenly have some clutchwork at hand. I was assigned of making an import function that reads through a textfile that looks like this, and store it to a 2D array: The columns are Tab-separated. As this suddenly came up, dont have the entire project file with me and I am nowhere near my old reliables, I tried conjuring this up in the most generic way possible: void signal::import_data(string filename){ ifstream file; file.open(filename.c_str()); if(file.fail()){ cerr << "file open fail" << endl; }else{ while(!file.eof) { for(int j = 0; j < NumCols; j++){ for(int i = 0; i

Well my problem is that I'm using send_data on my Rails 3 application to send to the user a file from AWS S3 service with something like Base.establish_connection!( :access_key_id => 'my_key', :secret_access_key => 'my_super_secret_key') s3File = S3Object.find dir+filename, "my_unique_bucket" send_data(open(s3File.url).read,:filename=>filename, :disposition => 'attachment') but seems like the browser is buffering the file and before buffering it sends the file to download taking no time on the download but at the buffering time it's taking as long as the file size .... but what i need is the

I have a project where I get the url to a file (e.g. www.documents.com/docName.txt) and I want to create a hash for that file. How can I do this. FileStream filestream; SHA256 mySHA256 = SHA256Managed.Create(); filestream = new FileStream(docUrl, FileMode.Open); filestream.Position = 0; byte[] hashValue = mySHA256.ComputeHash(filestream); Label2.Text = BitConverter.ToString(hashValue).Replace("-", String.Empty); filestream.Close(); This is the code i have to create a hash. But seeing how it uses filestream it uses files stored on the hard drive (e.g. c:/documents/docName.txt) But i need it to

My web application returns a file from the filesystem. These files are dynamic, so I have no way to know the names o how many of them will there be. When this file doesn't exist, the application creates it from the database. I want to avoid that two different threads recreate the same file at the same time, or that a thread try to return the file while other thread is creating it. Also, I don't want to get a lock over a element that is common for all the files. Therefore I should lock the file just when I'm creating it. So I want to lock a file till its recreation is complete, if other thread