Streaming Files - No Dialog - Streams Relatively Large Documents From A Webservice To A Proxy (Web Site)
Aug 2, 2011
I have a system which needs to be secure which streams relatively large documents from a webservice to a proxy (Web site) whch then grabs the stream and pushes this to the client. This works but there are some issues where it seems the response is not being pushed until the entire stream is complete? whether this is the case Im not sure have run charles and until it completes it is "Waiting for response".
The documents are currently PDF but it needs to handle many other types for the future. The octet stream etc is mostly testing related, how to get the Dialog to show - saying save as? for the large files the little ones don't matter to much but the big ones leave a big waiting period with no response.
Dim IncomingResponse As HttpWebResponse = DirectCast(Request.GetResponse(), HttpWebResponse)
Dim IncomingStream = IncomingResponse.GetResponseStream()
Dim BufferSize As Integer = 65536
Dim Buffer(BufferSize) As Byte
[code].....................
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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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Jan 26, 2010
I built a web service, it worked fine. however, got a problem recently. if I run my connection by a proxy, then it reports errors.
The request failed with HTTP status 407: Proxy authentication required
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Feb 2, 2010
I've been asked to get the page counts for documents stored as tif files. What I have now is looping through our third party software to open them and then get the page count. I can't stop the image from flashing and it is very slow. Does anyone know of a way to loop through them quickly and can the page counts (one image can have many documents)?
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Apr 18, 2010
I build an application that has two forms; one gets an employee info and stores in on a txt file (I accomplished that) and the other for viewing the records and searching for a record. I'm having troubles with viewing the records one by one when I click on the "Next Record" button.
The code below is only for view form
vb.net
Imports System.IO
Public Class frmView
'Dim strFilename As String
[Code] .....
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Mar 26, 2010
I am not sure if this is possiable but I am looking to build an application that will login to a web site, navigate the site and download files. I would like to do this all in code and able to run multiple instances of the program to get information from many different web sites. Is something like this possiable in VB.net?
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Apr 15, 2009
I am adding code to use a proxy server to access the Internet.The code works fine when requesting a file from a normal (HTTP) location, but does not work when accessing a secure location (HTTPS).[code]...
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Dec 18, 2010
I've a situation where I am trying to extract a large number of URLs from a site, but the site which provides the URLs has an obstacle. Rather than the link directly to the site, they provide a link to an internal page, which automatically redirects me to the URL I need.
i.e.
<a href="www.StartingSite.com/outgoing/1234" ...> Example.com</a>
which passes me to an internal page, then automatically routes me to Example.com
I've suspected if I can do this, it would be through cookies.
Perhaps a little more work, I could create a page which calls each page, then I could acquire the URLs from my history, but my browser would crash for the # of URLs I'm extracting.
any means I could gather the end URL of this link?
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Sep 20, 2010
i am working on my search button that searches for the items in my listbox1. however, i have several problems.. one, is that i do not know how am i supposed to search in folder browsing dialog and two, i cannot search for the items inside my listbox1.
For Each foundFile As String In My.Computer.FileSystem.GetFiles(My.Computer.FileSystem.SpecialDirectories
_MyDocuments, FileIO.SearchOption.SearchAllSubDirectories) --> Note 1
[code]...
note 1: i want to change the directory to a folder browse dialog not in my documents only
note 2: this are the items in the listbox that i am searching for
note 3: if found, the paths of the items will be displayed in this listbox
note 4: if it is not found, it will be displayed here
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Jun 7, 2011
I have been trying to find the best way create an Ole Object container of my own with the use of open-file-dialog, a button and a listbox. I just want to attach a file together with current dataset.I get an error that says 'Items' is not a member of 'Systems.Collections.ArrayList
Public Class MainForm
Inherits System.Windows.Forms.Form
Dim alrAttachments As ArrayList
[code].....
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Feb 20, 2009
I am developing a server-client voice streaming chat application with vb.net, i am recording wav files by a microphone and using .net.Sockets to transfer the files from a client to the server.
The runtime from the client follows as :
Public Sub sendFile(ByVal file As IO.FileInfo)
Dim BufferSize As Integer = 1024
Dim fs As FileStream = New FileStream(file.FullName, FileMode.Open, FileAccess.Read)
Dim NoOfPackets As Integer = Convert.ToInt32(Math.Ceiling(Convert.ToDouble(fs.Length) / Convert.ToDouble(BufferSize)))
[Code] ......
The problem that I am having is that the wav file that arrives to the server sounds really bad like interrupting each half-second. Another strange thing is that if the originally file es 46KB big the one that receives the server is 47KB. How I will manage to build a voice chat with good quality using this technology. How I can start sending streaming audio meanwhile une user is speaking.
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Apr 2, 2006
I want to know how I can take a regular avi, mpg, wmv, etc... with out a streaming server or a streaming file, and not downloading the entire movie Play it with windows media player or a different media player, oreven a custom one.
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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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Jan 5, 2011
I have trouble trying to create versioning of files like words documents. I would like to edit a word document and save it with the same name but I' like to choose between the modified last one with the original unmodified.
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May 3, 2009
I am developing a software and i need to make it save a text document, I can make it save it by writing the path of my document on my machine but it wont work on other machines when installed, how can I make it do this?
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Aug 4, 2010
I have a quick question. One of the functions in the program I am writing is to take all of the data entered, compile it into an HTML document, then place that document into a folder.For the past few days, I have just been using a random folder on one of my hard drives to dump the file in, but the problem is that, in my code, I have supplied the folder location as a string ("E:Practice FilesDocuments"), and therein lies the problem. Trying to test my program on a separate system brought the bug to my attention; obviously, this program can only write this file to a location of E:Practice FilesDocuments, and if any other computer that runs this program doesn't have E:Practice FilesDocuments then there is going to be a problem in the program working the way I have intended
So what I would like to do is instead of having it write the file to "E:Practice FilesDocuments," have it write to the default My Documents folder so that the program is no longer specific to my machine only. The problem is, though, I have no clue what the right code is to use. I first tried using
System.Reflection.Assembly.GetExecutingAssembly().Location to write the file to the default installation directory. This would have worked, but since this is a VB.NET program, the default installation directory isn't in Program Files and doesn't seem to be meant for users to browse through for their documents, plus it seems that trying to write back to this directory causes some unhanded exceptions and whatnot. I figured it would just be easier to create a folder in My Documents rather than use the install directory (and probably smarter).
[Code]...
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Jan 22, 2012
I need to down load/copy files as in TXT file from an FTP site.I need to code in VB.Net.Currently I manually save it into a folder on my C drive, which I then update my DB.I would like to do it thu my code.
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Sep 7, 2011
I would like to transfer files from an FTP site to my folder on C drive. For instance, I have an FTP site 169.69.20.100. If I go thru my IE I can see the lsit of files in here. I can simply click on it and IE will ask me if I want to open it or Save it. I want to automatically download them into my folder on my HDD. can this be done thru VB.Net?
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Feb 6, 2010
How do I incorporate my custom ASP.NET/VB.NET stuff into a DNN site? Long Version: I'm learning about DotNetNuke. I haven't done much yet, but I'm spending a while analyzing the software, hoping to be able to use it for a very large upcoming project.
[Code]...
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May 12, 2012
I currently have a part of my program that uploads an image file MainChart.png from a set location (locally) to a set remote location(on the ftp server). What I would now like to do is be able to upload more than one file at the same time.
What I am currently doing is repeating the same block of code, but changing the image file name from MainChart.png to another one of the image file names, so have about 8 instances of this block of code, Where the file name is just changed.
Does anyone know how I can do this in just one block of code, rather than the program having to keep calling another Sub and logging onto the FTP site each time for each image file that I want to upload?
Private Sub FtpMainChart()
' FTP_URL, FTP_UserName & FTP_Password, are variables that hold the FTP credentials, declared earlier in the code.
[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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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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Jan 26, 2011
I am trying to manipulate files as part of a Document Management application that stores documents in a location on a Network Drives. But the My.Computer.FileSystem.Drives collection does not contain the Network Drives mapped on my machine. I have about half-a-dozen of these, but none of them seem to show up in the Drives collection and thus are not visible to the other FileSystem functionality I need to use for file management.
how to make sure the Drives collection contains all my drives? I am running VS2010 Premium edition on Windows 7 64-bit on a 64-bit Dell machine.
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Mar 26, 2010
I am trying to use the filesystem watcher to monitor a folder on a ftp site for files added. Does anyone know how to do this? I have even read that the filesystem watcher was not meant for ftp's but rather local monitoring, which doesn't make sense to me.
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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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