File Download - Return The Value Using Bytes?
Jun 21, 2012[Code]...
How can i return the value? using bytes?
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Download Txt File Greater Than 100,000 Bytes
Dec 22, 2010I've been using the following code to download a text file from the web. It only downloads the first 100,000 bytes of the file which is no good if the file is big. The size of the file I'm downloading can vary from day to day, so I need to be able to download a text file of any size.
Dim wr As HttpWebRequest = CType(WebRequest.Create("http://sooty.postalgroup.co.uk/tempmac/nat-import.txt"), HttpWebRequest)
Dim ws As HttpWebResponse = CType(wr.GetResponse(), HttpWebResponse)
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Download File Size - Parsing Bytes?
Mar 29, 2011I'm trying to gather the size of a file to determine whether or not it's too large for my application to download.I currently have:
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Download Any Over 44.898 Bytes?
Dec 15, 2010I am trying to compare two files and I do not know why, the filed downloaded to be compared, is always only 44.898 bytes, despite of being bigger... what am I doing wrong, I post the
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[2008] Download And Move Progressbar By Bytes?
Feb 27, 2009Well i am coding a Application and it is almost done i just need to finish the Download part. Listing Files and so on is all done but now i need to Download the File which i know how to do but i dont know how i can read the Bytes got and how much is left. It is Downloading from a FTP.
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Maximum Return Bytes Of SOCKETS?
Jan 7, 2009I am building an application in which sends an outside server data, it then shoots back data which pertains to what I sent. The problem that I am having is that the maximum amount of bytes tha will come back is 8001. The program works fine as long as the return byte value is less then 8001. Something with the max value sounds familiar but I can not pin point it. What else could I do to receive the rest of the data? This code snippet is where im getting problem:[code].....
View 1 RepliesRead 2 Bytes Out Of 4 Bytes From A Text File?
Sep 22, 2011I created a text file contains 4 bytes of data
AABBCCDD
I just want to read the first 2 bytes (AABB) to execute it with my program.
Then I'll need to read the last 2 bytes (CCDD) for another computer routines
Return Key Event Make WriteFile For Com Port 0 Bytes Written?
Jan 22, 2010I have textbox with vbscript, user could type integers, then hit return key, KeyUp event for return would trigge theWriteFile()being called for com port to write string to the device, if Ihit return key slow, I would get 0bytewritten for WriteFile(), timeout happening basically,if I hit return keyquick,
View 1 RepliesDownload File From Http Server That Requires A Referral Before Allowing Download?
Nov 18, 2011I usually download file using following code:My.Computer.Network.DownloadFile("url of the file","filepath to save the file")But recently I encountered a site that only allow file download if you click it from its site and not via direct downloading from vb.net code.How to download file from http server that requires a referral before allowing the download?
View 1 RepliesAsynchronous File Download And Synchronous File Download?
Apr 13, 2011What is the meaning of asynchronous file download and synchronous file download ?
I came to them while using system.net.webclient class
I know a basic meaning of tcp/ip and http .
Download Multiple File + Progressbar But Cant Download File
Nov 10, 2011i try to download multiple file + progressbar.. but its seems nothing happened and the file is not download.. my program just function like.. when the file was error.. it will download the latest file from webhost..
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Using A WebClient To Download A File, But Being Able To Get The Download Information?
Oct 23, 2009Imports System.Net
Public Class DownloadStuff
Dim downloader As New WebClient()
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RijnDael Encryption/decryption - Select The Key Bytes And The Block Bytes From The Numeric Up/down?
Nov 13, 2010I want it to do is that you input a string, then you select an algorithm (Theres only going to be one RijnDael) then you input a key, then the Initialization Vector comes from "txtIV.text" then you select the key bytes and the block bytes from the numeric up/down, then you either encrypt or decrypt.
View 1 RepliesGeneric Restriction - Dont Select The Key Bytes And The Block Bytes From The Numeric Up/down?
Sep 16, 2011Ok i am having some issues designing a base-class to handle generics.Caveat is i need to restrict the type put in as a Numeric type, specifically Int16, Int32, or Int64 (Short or Long).I know you can do Of T as {Structure} but i dont want to select the key bytes and the block bytes from the numeric up/down.
View 2 RepliesBytes Written Exceed The Content-Length Bytes In XML Post?
Feb 19, 2011I keep getting a ProtocolViolationException "Bytes to be written to the stream exceed the Content-Length bytes size specified." on the following code.I've tried setting Content-Length numerous ways with no success.
Dim url = "https://domain.com"
Dim req As WebRequest = WebRequest.Create(url)
req.Method = "POST"
req.ContentType = "application/xml"
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VS 2008 What Does This Line Exactly Do - I = Stream.Read(bytes, 0, Bytes.Length)
Dec 28, 2010What exactly does this line do?
i = stream.Read(bytes, 0, bytes.Length)
Does it read the entire message string sent by the client? I have a line to write to the stream later in the code and that does not seem to be sending anything back to the client, although the code around is excuting.
i = stream.Read(bytes, 0, bytes.Length)
While (i <> 0)
Try
' Translate data bytes to a ASCII string.
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Download A File With A Download Timeout?
Feb 4, 2010I want to download thousands of files from the web and save them locally. What is the most efficient way? It is important the failures timeout within 10 seconds.
Is there a better way to stream one stream into another? Maybe a smaller buffer, like 1024 bytes at a time, is more efficient for large files?
Dim w_req As System.Net.HttpWebRequest = CType(System.Net.HttpWebRequest.Create("http://blah.blah.blah/blah.html"), System.Net.HttpWebRequest)
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File I/O And Registry - Modifying Bytes In File Without Rewrite
May 12, 2012I've been trying for a long time to create a sorted table of values in a particularly specific way, and I seem to be running into a wall in .NET's file operations. The premise is this - I'm creating a table of values which are being stored as [1 Byte][2 Bytes][3 Bytes]. The location within the file is a value that relates to these three stored values, and so I'm attempting to seek to a specific position in the file, write the 6 bytes into that position, and repeat. There are literally billions of these values, and the total file size is over 100 GB.
Now, I've tried multiple methods to do this, but every single time, it decides it needs to rewrite the ENTIRE FILE every time any change is made. This results in every one of these billions of iterations taking a good 15 minutes, making the task literally impossible. I'm using .NET 4, and I've attempted to use Text, Binary, and Random Access to get it not to rewrite the entire file every edit, but it simply will not obey.
So my question boils down to this: How do I edit specific bytes in a file without writing more than just those bytes? The entire file has been pre-created to the precise size required, and no bytes will be added or deleted in the process. I simply need to overwrite the bytes that already exist.
IDE :: "File Download" Dialog / Way To Perform Download Operation At Back-end
Jun 15, 2010I have created a application in vb.net. I am using Web Browser control in it.With this Web Browser control I open an URL and tries to Download something, it will populates an dialog for "File Download" to Open/Save/Cancel for the file..I am downloading the .ZIP file, and it will not show the checkbox for Automatically Do.Is there any way to perform the Download operation at the backend, means it will not ask me for such options.
View 2 RepliesFile I/O And Registry :: Read Bytes From A File?
Aug 28, 2010how to read bytes from a file... but is it possible to read each individual bit, one at a time?
View 1 RepliesChange Few Bytes In A File?
Oct 20, 2009Is it possible to change few bytes in a file to make unreadable or is it necessary to change each single byte?
View 1 RepliesEditing Bytes In A File?
Mar 26, 2010I'm trying to edit the bytes in a file. Using this code:
Dim stream As Stream = File.Open("file.exe", FileMode.Open)
stream.Write(File.ReadAllBytes("srcfl.exe"), "0446335", "srcfl.exe".Length)
Reading The First Bytes Of A File?
Mar 17, 2010I've got a web app where I'm trying to validate that an uploaded file is .PDF. I can't use ContentType because if the user renames the file to have a ".PDF" extension, the browser reports the MIME type to be ".PDF" even if it isn't.
I understand that one way to "validate" that a file is a PDF file is to look at the first four bytes, which should always be "%PDF". How do I open and read the first four bytes of a file in VB.NET to see whether or not they are equal to "%PDF"?
VS 2008 - .txt File - Write The File Path So That Someone Else Can Download My Program And File And Read The File
Feb 27, 2012Reading a .txt file in VB.net. My file path is C:UsersMyLilMulePepeDocumentsVisual Studio 2008Projectscurtain_calls.txt.
This is my line of Dim LoanOptionsFile As String = "C:UsersMyLilMulePepeDocumentsVisual Studio 2008Projectscurtain_calls.txt"
I can read the file when I run the program, but how do I write the file path so that someone else can download my program and file and read the file on their system?
Display KB Not Bytes 391 KB (401303 Bytes)
Aug 2, 2009Probably missing something silly here, Her eis what my display looks like Sending image...(401303) I would prefer it displays as Sending image...(391 kb)
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Add And Remove Bytes On From Start Of A File?
Jan 31, 2010I'm trying to open an existent file save a bytes in the start of it to later read them.
How can I do that? Because the "&" operand isn't working fo this type of data.
I'm using Encoding.UTF8.GetBytes("text") to convert info to bytes and then add them.
Read 6 Bytes Floating From A File
Mar 5, 2011I have an old fashion Database with several random access files and I need to import the data to a new Sql Server dababase the data. There are tables with 6 Bytes floating numbers fields and we have no Number data type with that length in VB. I tried and tried and... and can't find. I found this code in the ERP folder, is AlphaBasic. It use an envoirement namend A-shell from Microsabio .
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Replace Some Bytes In Binary File?
Mar 13, 2011I want to replace some bytes from a binary file .[code]...
If the value of the textbox is too short I want to replace the remaining bytes for a new value "0"
Streamwriter Creates File, But Is 0 Bytes?
Feb 25, 2009I am using the following code to write and empty (dummy) file to take up the remaining space on a device.RemSpace is a Public Variable declared as Long I have a function that gets the remaining space on the device and stores in the RemSpace variable (in bytes). I have tested with a msgbox to display the result of RemSpace, and it comes back correct (not 0). However, when the following code attempts to create the dummy file, the file is properly created but is only 0 bytes. What am I missing here?
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Variables - Reading Bytes In A File?
Jan 2, 2010After getting the file name I create a new filestream and load all the bytes from the FileStream into a byte array, now I need to get certain bytes and store them in fields like the second 4 bytes are the time the file was created. When storing these in the variables should I store them as bytes or as string/integers/etc.
Or have I done it completely wrong?
EDIT:Should I be doing this way instead of a filestream?
Dim data() as Byte = File.ReadAllBytes(path1)