Uploading Large Files Using FTP?
Mar 12, 2012
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.
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Feb 24, 2010
I have wrote a routine to upload a database file to a server using webservice which works fine until I try and send a large file. It errors all the time saying the connection was disconnected. how to upload large files?
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Sep 3, 2010
I am trying to import an excel file using asp.net and C#. I found an example in VB, but it is using something called "Server.MapPath" which is not resolving to a namespace. I am on .NET 4.0, C#, and windows XP.I found a "HttpServerUtility.MapPath", but I don't know if this is the equivalent for IIS7?
C#
public OleDbCommand ExcelConnection()
{
string conStr = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + Server.MapPath("~/ExcelImport.xls") + ";" + "Extended Properties=Excel 8.0;";
[code]....
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Jun 27, 2010
I am currently creating a FTPWebrequest to handle my uploading (the webrequest section of my function is below). At the moment my code loops through this webrequest section for each file - giving the file path of each file in the string "CompleteLocalPath". For each file it creates a webrequest and giving the required file path, uploading the file using a file stream, and then closing the stream. This works, but seems to take quite a long time. Can you recommend a more efficient way? Perhaps by using one webrequest but modifying the upload path?
[Code]....
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Dec 23, 2009
I want to upload files from particular location. I got problem with GetRequestStream() function.
Here is the
Dim path() As String = Directory.GetFiles("C:files") 'I tried and with("C:/files/")
For Each files As String In path
Dim ftprequest = DirectCast(WebRequest.Create("ftp://" & FTPHost & "/" & files), FtpWebRequest)
ftprequest.EnableSsl = True
ftprequest.Credentials = New NetworkCredential(user, password)
[Code] .....
Error message is:
The remote server returned an error: (500) Syntax error, command unrecognized.
When I tried with My.Computer.Network.UploadFile(...)
I got this error:
The remote server returned an error: (550) File unavailable (e.g., file not found, no access).
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Aug 19, 2010
[code]I would like someone to kindly ajust it so instead of uploading from the "Downloaded Songs" in the application files, i would like it to upload from the user's "My Music" Folder
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Nov 5, 2009
I am uploading file to mainframe and before uploading when I open it using notepad I am able to view it.
Once uploaded the administrator is complaining that he is not able to read the data in file and it appears as junk.
Is there anything else I need to do before uploading files to mainframes. I am using Chilkat component to upload the files to mainframes.
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Nov 10, 2010
I need to upload a file and rename it. I have found a lot of code that uses the WebRequest for this. I was wondering if there is another method that logs in to the ftp server and will stay connected while I upload files. I am doing this for a webcam application and it seems another method would be quicker than using the credentials each time I need to upload and then rename the file.
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Aug 2, 2010
I have a file uploading and viewing page in ASP.Net 1.1 using VB. Now the page will be visible in intranet as well internet. Here in my case the intranet and internet servers are different. How can i save the uploaded file in the intranet server and view from there subsequently when the activity is done using the internet server?
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Jul 3, 2011
I need to upload a large set of files and directories to my web server, all of the files that I want to upload to my server are located in "C:Files_To_Upload" directory, it contains thousands of files and maybe 100 directories/sub directories so I don't want to have to specify each specific sub folder and file - jmcilhinney's ftp example which I am currently working with shows a way to upload all of the files from a specific directory, but not subfolders and their files. How can I get it to also upload the sub folders and their files?
Code I am using based on jmcilhinney's threaded ftp example:
Private Sub UploadFolder(ByVal source As String, ByVal destination As String)
For Each file As String In IO.Directory.GetFiles(source)
Threading.ThreadPool.QueueUserWorkItem(AddressOf UploadFile, _
[Code]....
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Nov 26, 2009
I need to upload multiple files in a winforms application. So far I've been using a webclient and while this is working fine I'm wondering if there is a better way for doing this. Does the webclient make a new connection for every request or does the connection persists between uploads?
Dim Ftpclient As New System.Net.WebClient()Ftpclient.Credentials = New System.Net.NetworkCredential(username, password)
Dim Files As New Dictionary(Of String, String)Fill dictionary with items for upload here
For Each RemoteFile As String In Files.Keys Ftpclient.UploadFile(RemoteFile, Files(RemoteFile))Next
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Dec 11, 2011
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.
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Mar 2, 2011
I am using an ASP.NET FileUpload to upload files to the server.How to upload it to the rootfolder of my project. I want to add the files to a collection or list of files to be shown on the webpage in the form of gridview.Each file should have a link to itself in the list So that it could be downloaded by the click-if desired.The gridview will also have a delete column so that I can delete any of the corresponding file-as desired.
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Apr 12, 2012
I have built working VB.net code that uploads multiple images to the server using Plupload. I am using an HTTPHandler (FileUpload.ashx) to do the uplading and want to add a SQL Statement that will insert each of the images File Names to my SQL Database. I have tried just adding the SQL to the Handler, but when I do I get 4 database entries for each iamge that is uploaded.
Pertainant HANDLER code:
Public Sub ProcessRequest(ByVal context As HttpContext) Implements IHttpHandler.ProcessRequest
[Code].....
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Dec 13, 2005
I'm totally new at web-programming and haven't got a clue where to start looking.I'm writing a .NET exe using VB.NET 2003 and it has to do 3 things online.1) it has to read contents of online textfiles (this works, I'm using WebClient)2) it has to upload local textfiles to a webspace (doesn't work 404 error)3) it has to append lines of text to a existing textfile on the webspace (this is not important right now, fix 2 first)What approach do I need to take? I have been unable to find any good articles on this, everyone uses an ASP.NET app, but that cannot be done in my case.
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Jul 30, 2011
I am trying to add multiple files to FTP server by dragging and dropping and I am able to do that using try catch block and if we give the ftp settings correctly it takes 1 sec to upload them but when we give wrong details it hangs up and dosen't give me any error message though If I give an exceptional message.
Now I am getting error message as well as success message for every file I add.I do not want that to be happen.where should I give messages for success and failure so that it should take few seconds for uploading and if not should give me a message immediately.
Here is my code:
Private Sub uploadFile(ByVal FTPAddress As String, ByVal filePath As String, ByVal username As String, ByVal password As String) 'Create FTP request
Try
[code]....
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May 20, 2009
Well when i am uploading files with FTP then people can always read my information with a Network Sniffer.Thats why i now want to solve it with a PHP-Script now:This is the information when i upload a file:everything that is red i do not understand i tryed it then with the code below but doesent work. [code]
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Jan 29, 2009
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
[code].....
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Jul 24, 2010
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].....
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May 13, 2009
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.
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Dec 20, 2011
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.
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Sep 17, 2010
Which is the most performant way to read a large csv file in .NET? Using FileStream? or another class
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Apr 27, 2012
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?
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Jan 29, 2010
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.
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Jun 24, 2009
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
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Apr 13, 2009
I am using this code to write files
Try
Dim ObjWS As New localhost.Service
'ObjWS.AssigningDataToTemplate(1550, arrValues)
[Code]....
Here i got proble to send a large size of file like 500 mb file etc
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Jun 19, 2010
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 ?
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Sep 21, 2010
I am working on a program for a customer and am working in VB2010 in VB language. I have two rather large files that contain data. File #1 is over 300,000 lines of data. File #2 is over 100,000 lines. The files are CSV text files. On a User Form, there are two values, "StartTime" and "StopTime". This is the process I am doing:
1. Read both files into ArrayLists
2. Get item #1 of ArrayList #1 (we'll call this "A")
3. Get item #1 of ArrayList #2 (we'll call this "B")
[code]....
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Sep 12, 2010
I am writing a small tool that identifies digital scielence in non compressed PCM WAV files. Its purpose will be to scan files approximately 1 hour long, containing mostly scilence and spltting the periods of non scilence into files and discarding any digital silence which is encoded as null bytes.I am wondering what the most efficient way of scanning the files is. I am able to derive the number of bytes for each second from the file header (in my case 16000) so am considering reading into a buffer of this size then scanning byte for byte, if I identify a non-null byte I will start siphoning the data off to another file.My issue is with scanning large expanses of digital silence which could be many megabytes of data which would require examining each byte to determine wether or not its digital silence. Surely there is a more efficient way of skipping them as I am not interested in them.
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Jan 30, 2012
My problem is I have very large text files (approx 2GBs+).They have records in them based in one per line.Each line is not the same length and the data can be different lengths all the time.I am currently reading the file line by line, then splitting the data by common characters in the records. To process the full file it currently takes 3hours. This is way too slow for its purpose.
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