Splitting Large Files Into Multiple 500 MBs With Extensions
Aug 1, 2011
I'm working on trying to split a large file from say 3gb to multiple 500mb files with a .1, .2, .3 etc... extension. My output is one 500mb file and one 28kb file. What I'm missing to continue reading the filestream into the 2nd split file.
Sub SplitFiles(ByVal inFile As String, ByVal newFileSizeBytes As Integer)
Dim i As Short = 1
Dim fsInput As New System.IO.FileStream(inFile, FileMode.Open, FileAccess.Read)
Dim fsOutput As System.IO.FileStream
Dim bytBuffer(4096) As Byte 'holds a block of bytes for processing
[Code] .....
Does anyone know what the best way to split up large files in VB.NET? These files can be in excess of 10GB. I have found ways of doing it by googling all day! most of the solutions I have found almost work. But what I really want to know is what is the most efficient way to do this?
I have certain files that need deleted every time I run my program. There are some files that start with f. and then end with .00000668 or .00005396 and so on. Here is my coding that is not working to delete the f files.
[Code] each file is about 30 kilobytes in size, and they contain raw hardware statistical information in a comma-deliminted format. I want to do the following with these files as my end-result.
NEWFILE.CVS contains the contents in this format:
metric_group_001 metric_group_002 metric_group_003 metric_group_004 etc.
I don't want APPEND, I want to concatenate the contents of these files into one large master file. I am able to do this MANUALLY, but I need to have a DYNAMIC method of doing this because of the number of files will change depending on the test we are doing with the hardware. This is the code I am using to do this process manually and it does work, but I need a DYNAMIC method in place. [Code]
I am trying to upload 2 large files to a ftp server by uploading as one file to a location. I have it working if the files are small but it crashes with large files.
For i As Integer = 0 To filelist.Count() - 1 Dim fRequest As FtpWebRequest = WebRequest.Create(ftpPath & "/Reports/" & filelist.Item(i)) fRequest.Credentials = New NetworkCredential(username, psswd)
I'm fairly new to VB.NET, and I'm working on a text editor with a tabbed interface. I deal with large text files. Should I have each tab / text document open up in a new thread or a process? I basically want the entire application to always run fast as the text editor is just one part of it. If I have several large text files open I don't want the rest of the application slowing down a bit.
i am using the getfiles function to have all the files in a specific path but i want to use the getfiles to find .rar and .mp3 getfiles("c:program files",)
Dim dir As New IO.DirectoryInfo(FolderBrowserDialog.SelectedPath) Dim files As IO.FileInfo() Dim filename As IO.FileInfo If (rbNoSubfolders.Checked) Then
[Code]...
I'm getting an "Illegal characters in path" error. How can I fix this?
Path = "C:" For Each FoundFile In My.Computer.FileSystem.GetFiles(Path, FileIO.SearchOption.SearchTopLevelOnly, "FILE*.10") _ And For Each FoundFile In My.Computer.FileSystem.GetFiles(Path, FileIO.SearchOption.SearchTopLevelOnly, "FILE*.09") 'do code
Next My goal is simply to search for multiple file extensions. I cant use FILE* as my search parameter as this returns other files e.g FILE2012.10z which i don't want.
the problem is I'm trying to access a file that has no file extension. I think you can see why this is so difficult. The specific file I'm trying to edit is the hosts file (C:\Windows\System32\drivers\etc\hosts).
How would I loop through a directory recursively, and get a list of ALL file extensions used, not duplicating any of them? It could just output to the debug window. Or perhaps write to the database and have the database filter the duplicates. So it would be great to see...
I'm trying to delete all the files in the same folder that have the same name but different extensions, such as CurrentWallpaper.bmp, CurrentWallpaper.jpg, CurrentWallpaper.png, without putting them in a separate folder. How could I go about doing this? I tried doing
Dim bg As String = dir + "" + Login.UsernameTextBox.Text Kill(bg + "CurrentWallpaper.*")
but it didn't work. PS: I would also like to use the same technique for loading the image as a background image instead of having to do this:
Try If My.Computer.FileSystem.FileExists(Login.UsernameTextBox.Text + "/CurrentWallpaper.jpg") Then Me.BackgroundImage = Image.FromFile(Login.UsernameTextBox.Text + "/CurrentWallpaper.jpg") End If
I want to design an application that can open file of certain extensions. For ex. There is a software called ARJ32 which can open file with extensions .a00 ,.a01...................,.a19. Also there is application called apk emulator which can open .apk files. So eve I want to design an application that an open certain file extensions. Is it possible? How do I start? I am well versed with c, c++, Java, VB.NET
I'm writing a program that allows users to view certain files using a DataGridView as the selection method I can do most of that just fine. Here's the part I'm having trouble with: I want to open the files using whatever program they have associated with the file extension. After researching it (on these forums), I determined that I should use the Process.Start() method. However, Windows throws an Win32Exception if there is no association to the filetype, and I want it to show the "Open With" dialog instead, and I can't figure out or find how to do that.
Private Sub SaveAsToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SaveAsToolStripMenuItem.Click timedate.Stop()[code]......
The problem is that if I save a file I get "myfile.GDL" if I overwrite that I get a new file "myfile.GDL.GDL" ect.the other problem being that the filtering in the windows save/open dialog wont show .GDL files unless I select "all files".
Is it possible for the monitor's screen to be split into multiple panels using vb.net? What I'm thinking about is I have two or three panels in the screen, the first panel is running a powerpoint presentaion, the other has an excel worksheet open and the other has a windows and fax viewer open something like that. Is it possible to do this on a windows form application project?
I'm using windows xp sp3 pentium 4 3.00ghz 2.99 ghz 1.99g ram Intel ® 82915G/GV/910GL Express Chipset Family (this is the video card right?) a plug and play 17 inch 1708 Dell monitor
I wrote a program to download and play AVI files the files are large in size and long time wise. I have the files playing as they are being downloaded but i can't see how long the file is or seek reliably. i was reading that the AVI headers are in the last 512kb of the AVI file *why would't they put it at the start* lol so my question is is there a way to download the last 512Kb of the file i'm downloading. i have the Bytes Read and Length of the file while its downlaoding i'm just not sure where to go from there, or how to do it atleast. If i had the length in time of the Avi file i could set the trackbar to be able to seek properly. or if someone has an idea how i could get the time of the video by using fps and some math i could prob do it that way too but idk how i would tell how i can find how many kb are in the fps i'm sure it changes so think that way is't going to be reliable. how to get the last 512kb would be the best option not sure if it can be done even.
How do you recommend I copy large files over the LAN (>20GB)Currently I am using File.Copy.Another question I have is how can I implement this class to be self contained, meaning that it would report progress to the object that called it? or do I have to define a delegate in the calling object?
Code: Public Class cCopier Private Delegate Function CopyProgressRoutine(ByVal totalFileSize As Int64, ByVal totalBytesTransferred As Int64, ByVal streamSize As Int64, ByVal streamBytesTransferred As Int64, ByVal dwStreamNumber As Int32, ByVal dwCallbackReason As Int32, ByVal hSourceFile As Int32, ByVal hDestinationFile As Int32, ByVal lpData As Int32) As Int32
The underlying connection was closed: An unexpected error occurred on a receive.If I look on te FTP server I can see that the file has been uploaded entirely which led me to believe that the control channel was timing out. I have tried modifying the timeout on the FTP server as well as the ReadWriteTimeout in my code to no avail.Here is my code...
Dim ftprequest As System.Net.FtpWebRequest = DirectCast(System.Net.WebRequest.Create(destination), System.Net.FtpWebRequest) ftprequest.Credentials = New System.Net.NetworkCredential(username, password) [code].....
I am opening a large PDF file using the following Process.Start(Application.StartupPath & "PREVI.pdf")
I have two questions: 1) Is there a way to go directly to a page number? 2) Can I write a code to have the table of contents show up on the left side of the document so users can click on to go to different sections of the document, not sure if this needs to be done while creating the PDF or if we can do it by code.
If you were to upload a project to any site but are concerned about the large file size, what are the only files you need to zip up for your project to work for either VB 2008 or VB 2010? So far I know you don't need the exe's, the pdbs, and xml files.
I have trying to upload some large files using FTP. Here is the code I am using below.
Private Sub UploadFTP() ' Open file.txt with the Using statement. Using r As StreamReader = New StreamReader("list.txt")[code]....
I basically loop the above to upload all the files in a specific directory. This works fine with small text files,but when I try uploading a large 30+- mb file it gives me an error.
Quote: The underlying connection was closed: An unexpected error occurred on a receive.
On
cls_stream.Close()
I understand this is caused by .Net not communicating with the server properly? I tried searching all morning to only get confused by all the different methods.
I have created an vb.net windows application. In the application i have 2 xml files (e.g., Pre.xml & Post.xml) & the 2 files are same structure.
My requirement is compare the pre & post xml files and get the differences between xml files. Like what are all the newly added nodes, removed nodes and modified nodes as well.
I tried with XmlDiffPatch.Dll, it is working for small size xml files, but in my case xml file size should be upto 100+ mb.
I am working on a application that stores videos, images and files. I would like to give the user the possibility to encrypt them. I am tying to use AES to encrypt them but the problem is that the decryption takes to long.I was hoping that the loading time from the hard disk of the encrypted file was far longer than the process of decryption of an image for example but i was wrong
So if i try to 1) load the image 2)decrypt it and 3)load it in a image control it takes 15 times more time that loading the original file not encrypted
Just a doubt: if I have large amount of image files for my app, is it ok to store them in the resource file ?
Will those files be saved in a single resource file ? Will that cause any problem to the performance of my app ? When I try to access a image file from the resource using code, will it load that file only into the memory or the entire image contents from the resource file ?
