FtpWebRequest.GetRequestStream Hang Up And Fails?
Jul 30, 2011
I have wrote a web service, in a nutshell it uses openpop to get email messages does stuff with the content to insert into databases and saves attachments which are images. That works fine when i save images locally, it does exactley what it is suppose to. Now an added requirment was to save images to an FTP directory, so i can create my folders dynamically (they are created based upon timestamp) and that works well. My problem comes from when i try to save them to the ftp. Yes my user name and password are correct,otherwise i wouldn't be creating the directory.
Private Sub UploadFile(ByVal fileToSave As FileInfo, ByVal path As String)
Dim UploadRequest As FtpWebRequest = DirectCast(WebRequest.Create("ftp://UserName:Passowrd@999.99.999.9" & path),
[code].....
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Jun 10, 2010
This Is regarding the post "FED07" posted which as a couple of months ago.He gives this
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
Dim arr() As String
[code].....
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Aug 20, 2009
I am putting together a simple app and I have it working for uploading, downloading, deleting files using FtpWebRequest. But I cannot find how to move a file using FtpWebRequest. What is the simplest way to move a file from one dir to another without using another external dependancy?
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May 12, 2011
I would like to be able to either change the current directory (FTP) OR set it up when it first loads. My attempt to set it when the app first loads fails with a 550 error, when i try to change it using the method found here[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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Apr 29, 2010
is there a way in ftpwebrequest to get the status of the connection? In VB6 using inet component you can use Statechanged, is there a similar way to do the same with ftpwebrequest?
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Aug 29, 2011
How can I get the files size when using ftpwebrequest
I'm downloading files fine, just cant figure this part out
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Jun 20, 2011
I would like to use FtpWebRequest on a remote machine but I am getting remote server returned an error: (504) Gateway Timeout How can I fix this?
Here is my sample code:
Dim localFile As String = Nothing
Const remoteFile As String = "INBOX/"
Const host As String = "ftp://111.11.11.111/"
[code].....
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Jun 28, 2011
I am trying to convert a VB6 app to vb.net. It used msInet.ocx and I am using FtpWebRequest to replace it.I have a problem when the password is blank and then remote server throws a 500 error.WebException was handled The remote server returned an error: (500) Syntax error, command unrecognized.
Const localFile As String = "C: eststat.txt"
Const remoteFile As String = "/stat"
Const host As String = "ftp://myprinter"
[code]....
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Sep 2, 2009
How do you set Site values in FTPWebRequest in VB.net.[code]...
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May 13, 2010
I'm working in this piece of code to transfer a text file from the C: drive to a ftp location. Below is the
Dim clsRequest As System.Net.FtpWebRequest = _
DirectCast(System.Net.WebRequest.Create("ftp://10.0.0.221/sample.txt"), System.Net.FtpWebRequest)
clsRequest.Credentials = New System.Net.NetworkCredential("anonymous", "edge")
clsRequest.Method = System.Net.WebRequestMethods.Ftp.UploadFile
' read in file.
[Code]...
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Oct 14, 2009
I am working on an application in vb.net to move files back and forth between a client and a ftp server. We will be creating, deleting, and renaming temporary files during our update process.I want to check for the existence of a temp file before I begin an upload process to keep different users from trying to update the same file at the same time. I have a method (below) to check if the FTP file exists (using ContentLength), but I want to be able to pass in a string with a wildcard such as:
FileServer.FtpFileExists("MyTestFile.*.txt") Can I use a wild card with a FtpWebRequest object? What about a regular expression? Or should I pull down the directory(between 200-500 files) and iterate through that list on the client side trying to match with a regex/widcard? 'Find if File exists from FTP Server for File specified Private Function FtpFileExists(ByVal RemotePath
[code]....
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Jun 27, 2011
I have a vb.net window application to upload text file by using ftpwebrequest to a server. my question is: should I add a server response to the client application to make sure the server actually got the file. what I got now is only client side (to upload file to a folder in the server PC), but I havnt got a server side application to send response. If yes, how to create the server side application
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Jan 17, 2012
I have a VB.NET GUI (VS2005) that calls into a VB6 DLL to query MSAccess 2003 databases using DAO 3.6. Yes, I know this is not an ideal scenario, but that's the way the current application is set up. Component Checker shows MDAC 2.8 SP1 is installed. This application usually runs for a long time on our customer's Windows XP SP3 system with no issues. Occasionally (read: after 11 minutes or 11 hours or days), we experience a hang in the application, such that it needs to be ended with task manager and restarted. According to crash dumps and one lucky capture within the debugger, all threads are waiting on objects/critical sections within ntdll.dll. My specific thread gets stuck there and comes from MSJet40.dll. In the crash dumps, most threads are stuck in NTWaitForSingleObject, RtlEnterCriticalSection, etc.
I've been troubleshooting this intermittent issue for months and am convinced this is a bug in MSJet40.dll. The version of the DLL is 4.0.9511 and I see there is a hotfix for 4.0.9514 on XP SP3 outlined in: =[URL] I would like to get this hotfix to see if it fixes the issue and speak with MS if it doesn't. I have crash dumps and procmon traces of these events. This sounds very similar to the dreaded "Jet Bug" that shows up on a Google, supposedly fixed for Windows 2003 Server SP1, but I see no mention of it on Windows XP SP3.
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Jun 23, 2010
I am trying to send and receive data using the SerialPort component. I am sending data to an Texas Instruments MSP430 which simply echos the sent character. I wanted my VB solution to read characters from a file, send a single character, and wait until the echoed character is received before sending another.
I have been fairly successful thus far but I have run into a little catch. When I attempt to send large files (323505+ characters) my MSP430 just hangs there and will not receive any more characters. My VB app return to VS '08 with timeout errors (timeout set to 1 minute).
I wanted to post my VB code here to see if the problem is from my VB app. I will be posting this problem on the IT usergroup to sort out anything on the MCU end. Here is the pastbin of the data write and the data receive subs:[URl]..
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Feb 5, 2009
I am using Background Worker control to cancel internal operation.I am populating data in to datagridview and written this entire code in Do_Work event of Background Worker .But when my number of rows are greater thansize of datagridview that time my application is hang.Number of row always greater than 50.
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Mar 15, 2011
This will be my first post on this site, so I thought I would make it a doozy. I have an web application on our site at work that allows users to login to the system, and submit filings for dockets that our state agency governs. Without getting to involve with what that means, they basically upload mostly .pdf files, but there are others that are acceptable to upload as well. The current system that is being used, uses a simple FileUpload and saving it to a folder on the d: drive of the webserver. I ran into a problem that with anyone outside the building/network, the upload is extremely slow and seems to be limited files no larger than about 1.4MB. There have been a few cases where larger file have made it through, but those ar few and far between. I've tried a couple different 3rd party components, but seem to run into the same limits. So, I install the FTP server on the box with the IIS and am trying to go the FTP route using ftpwebrequest.
Below is what I have put together so far:
Imports System.Net
Imports System.IO
Partial Class _Default
[CODE]...
This seems to work as it is at the moment, but I know it has a long way to go for catch exeptions, speeding it up...
1.) The first problem I have run into is if you try to upload to large a file, you get Out of memory error. I'm needing to change the buffer so that it is buffering chunks instead of the entire file. I've googled over and over again and seem to find several good options in C#, but can't seem to convert them to VB. So, could some one give me some idea how to take what I have and change the buffering to use smaller chunks.
2.) I need to catch an empty UploadFile field.
3.) I will eventually be changing this so that it handle multiple file uploads like my current system uses. (Did I mention that I'm new to the ASP.NET and have been programming in .ASP)
4.) As you will notice from my list of acceptable file types, I might have a problem with some needing to be upload as Binary and some not. So I'm going to have to come up with a way to test and change the Requested.UseBinary = False as needed.
I'm sure that I'll find other items as I progress or the big bosses will find other things that they want to add, but for now.... I know that given enough time, I will get all of these items worked out.
By the way, we have a network adminstrator that leave a lot to be desired and most IIS and now FTP I'm having to learn, implement and configure. I'm wondering if there is anything else that could be causing these limits in file size. Since I've tried 4 completely different forms of uploads and they all seem to run into the same limits, I thought there might be something in a router, firewall, server configuration.... that I might need to look into as well.
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Sep 3, 2008
It's working kinda, but at the end when transfer is finished the file on the ftp is corrupted. I found about 3 ecamples online with this class and they all give me the same corruption
Code:
Imports System.Net
Imports System.IO
[code].....
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Apr 29, 2012
i have written a small app that:-Periodically captures a portion of a screen to jpeg file-Uploads this file to ftp serverAt first i used My.Computer.Network.UploadFileand it worked like a charm. Then i wanted to move to FtpWebRequest async. The reason was because i implemented a global keyboard hook and locking the main thread for upload, disabled my keyboard.I copied the example in MSDN regarding FtpWebRequest. the problem i have is that it seems that the file that is being uploaded is locke
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Jan 22, 2012
Can FtpWebRequest work with sites like Box.com or MediaFire (I suppose it isn't FTP)?
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Oct 26, 2010
I'm having trouble finding a reliable method to check if a directory (folder) exists on an FTP server. I want to create new directories and then upload files into them but thought it best to check if the directory already exists. Although attmepting to create a directory that already exists does not seem to cause any errors, it does waste a bit of time.
This code reliably checks if a FILE exists:
[code...]
I have attempted to modify this with ListDirectory in place of GetDateTimestamp (to check if a directory exists) but it seems no exception is thrown whether the directory exists or not. I've done lots of Googling but haven't found a satisfactory answer.
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Jun 29, 2010
I need to upload a file to an ftp site. Can I use a simple webclient or do I need to use ftpwebrequest? What are the differences?
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Sep 4, 2009
I am made program to get Picture Pixel and check Pixel colors.
between looping my Application Form HANG (STOP) and also how can stop loop between working (on Run time)?
in listbox1 picture List with path
For P = 0 To ListBox1.Items.Count - 1
DisplayPic.Image = System.Drawing.Image.FromFile(ListBox1.Items.Item(P))
Call GetPicPixel()
[Code].....
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Feb 17, 2010
My application get hang after i download log from hardware unit.Basically hardware protocol is custom design(no modbus).there are huge number of records(minimum 1000) which i have to show in grid at the time of download process takes place i add new rows into grid to show record function works on but after function execution over application gets hang. No process is pending after that function.
Private Sub manikPro_DownloadDataReceive(ByVal packet As String) Handles manikPro.DownloadDataReceive
Dim str As String = ""
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Aug 29, 2010
I have a background worker that's checking the status of four services on a remote server.This is setup on a timer (5 Seconds) as below. For some reason it's hanging the UI thread causing the application to 'lock' for a second each tick, I cannot work out why?!
Private Sub ServiceTimer_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ServiceTimer.Tick
_ServiceBGWorker = New System.ComponentModel.BackgroundWorker()
[code]......
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Apr 9, 2012
I have some coding which basically edits my text file and removes the duplicates. For some reason when I run it, it hangs my application for like 10 seconds - the coding does work just hangs my application..[code]
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Sep 11, 2009
I m make search file project. In This Project I Search All File From Drive. ( *.* )When i Press Button For Search, Its Still Hand For Few Seconds Or Minutes When Search Completed its Normal. 1. How to Resolve its Hanging. 2. Can I Add Progress-bar For This Action. [Code]
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Mar 22, 2012
I need to write a monitoring/watchdog program to check a series of application..The monitoring program should be able to Determine whether the applications it is monitoring has hang or no response If it hangs, restart the specific application.What sort of API in VB.NET can help me achieve this?
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Sep 4, 2011
Try
OleDbConn = New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=D:\list.mdb")
OleDbConn.Open()
[code]......
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May 23, 2009
I have a vb.net project which sometimes, when running in the IDE, suddenly hangs. Normally this wouldn't be a problem. Just hit 'pause', look at the currently running threads, and find the deadlock (or whatever else). But now I'm running into a situation where not only does the program hang, but trying to pause it causes visual studio itself to hang. In order to get control back, I have to kill the program-being-debugged's process, at which point visual studio comes back to life and says it was unable to pause execution. This is frustrating, because killing the process means the program state is lost (of course), so I don't know where the hang is.
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