Streamwriter Creates File, But Is 0 Bytes?
Feb 25, 2009
I 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?
[Code]...
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Feb 10, 2009
I have a testing platform that allows data to be posted to a real time collection system. It uses the StreamWriter object to send both HTTP and XML formats, It works fine, but there is a new request to submit uploaded files. This again works fine, unless the files are over 70k (we need to test upto 3MB). If it is over 70k, the response is the content-length too big. I have changed it so that the content-length is now set dynamically, dependant on the size of the file uploaded. However, when the StreamWriter.Close() runs, the execption The request was aborted: The request was canceled. is generated, with the InnerException Cannot close stream until all bytes are written.
From what I have found on the web, the solution is use StreamWriter.Flush(), but this code is already in place.
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Sep 22, 2011
I 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
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Apr 21, 2010
I am taking in two html files and creating one out of them. To do this I am opening the first html file and not writing out the closing </body> and </html> tag and opening the second file and not writing out the corresponding opening tags, as well as the <style></style>section. I start a streamwriter, and write the lines out to it, and then close the streamwriter. My problem is that the output file is filled with strange characters. I've tried opening the streamwriter with different character sets as the third parm, but all this does is change the characters to different strange characters.It says charset=windows-1252 at the tops of the input files (and the output files for that matter - since I'm just reading stuff in and writing it out - with the exceptions mentioned above).Questions;First, do you think I am properly approaching appending two .htm files together?Second, how can I eliminate these strange characters.
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Aug 6, 2009
I was thinking about creating a program that creates an .exe file. (I know that that is very difficult but I have 3 days that I'm not sleeping because i'm thinkin about it)The program should create the .exe file on button clickThe created exe should be in Normal Windows State, it should have only a button that doesn't do anything and it's path should be C:UsersAdministratorDesktop
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Jul 8, 2009
I am trying to convert VB6 to VB.Net, in VB6 my predecessor has used an open command which i presum creates a file or opens a file from the directory that it is told to look in, what is the .Net equivelent of this?
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Sep 28, 2010
I have been thinking about creating an event calendar. I thought through the idea of how i would attempt it, but only came up with one idea; Text files, a folder for each year, and a folder for each month.. when the user creates a new event a text file gets created in: e.g. \2010\Jan\12.txt and if another event is on that same day, the text is added into the same text file. But this leaves lost hopes for my other ideas, since it will get very complicated. Like yearly events, monthly events etc.
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Nov 13, 2010
I 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.
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Sep 16, 2011
Ok 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.
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Feb 19, 2011
I 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"
[Code]...
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Dec 28, 2010
What 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.
[code].....
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Mar 29, 2009
Dim fs As New FileStream("C:est.txt", FileMode.OpenOrCreate, FileAccess.ReadWrite)Dim b As New StreamWriter(fs)
b.WriteLine("hellothere") : b.Close()
b.close is necessary to save changes to the file, but then, fs will be closed, too. is there any method that does the same thing but doesn't close fs, like "b.save"???
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Oct 26, 2006
VB 2005 now offers different methods to write/read a file, such as the File.WriteAllText, the My.Computer.FileSystem.WriteAllText and the StreamWriter.Can anybody explain when is it better to use which method, which one is more efficient in term of memory/processor use and performance time?
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Jun 15, 2011
I'm trying to write a file and I have this code so far.
Dim File As System.IO.File
Dim Write As System.IO.StreamWriter
Write = File.CreateText("C:UsersJoshuaDesktopCreation.txt")[code].....
When I run the code, the file is created but is blank. I can't find where the error is.
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May 13, 2010
I have code which needs to be run 3 times with results written to different files each time. I have the following excerpt from the code:
[Code]...
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Sep 3, 2010
encountering a problem when trying to write data to a text file. If I put the output into a messagebox I can see it, but when I attempt to write it to a file it is just blank. What am I missing here? EDIT - This is just a simple winform that I specify a path to a local HTML file in Textbox1 and I'm attempting to parse some HREF tag data.
Imports System.IO
Imports System.Text.RegularExpressions
Public Class Form1
[code]....
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Sep 26, 2011
I need to add a row of data to an exisitng TextFile that is in Tba delimited format. My program currently used ADO to read and update the table but that was creating to many problems with varying 3rd party providers of the Text File.
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Mar 15, 2008
I have a code which reads a text file through streamreader,selects what is important and writes the same to another fileusing streamwriter. The problem is that the streamwriter stops writing beyond a certain line and just doesnt write ahead.What can be the problem? Do I have to make two seperate files?
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Oct 19, 2009
In the following, Response.Write poduces the expected result of displaying user name and password - but nthing is written to the text file (colocated in the root directory).[code]...
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Jun 12, 2011
In the following, Response.Write poduces the expected result of displaying user name and password - but nthing is written to the text file (colocated in the root directory).
Imports System
Imports System.IO
Partial Class getCustomer
[code]....
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Feb 19, 2009
How would I go about using the Streamwriter in VB.Net to create a dummy file of 64 kb? Did a search of the boards, but didn't run across anything
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Apr 13, 2012
why if I use StreamWriter .WriteLine, 001(zero,zero,one) is converted to 1? how Can I write in a file 001(zero,zero,one)? [Code]
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Mar 13, 2010
I have searched the web for an answer to this but can not find one anywhere. I have a program that will be sending text to different text files based on a selection in some combo boxes, I was wondering if it is possible to select the file path based on the combo box variables eg
if the user selects hello and then 4 in the combo boxes then the text will be saved to
w = New IO.StreamWriter("c:projecthello4.txt")
or if they select hi and 5
w = New IO.StreamWriter("c:projecthi5.txt")
i have tried setting 2 variables called a and b and trying to run the following
w = New IO.StreamWriter("c:project{a}{b}.txt") but this does not work
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Apr 18, 2010
When there's no file path in the streamwriter constructor does anyone know the location the file gets output to?
Dim sw as StreamWriter = new Streamwriter("test.txt")sw.close
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Nov 4, 2011
building another command-line app and I need to generate a log file and write to it throughout the app's run, but the log needs to be named <work_order>_<device>.log - both of those are held in a text file and will change frequently.
I can extract them no problem, and use them in the log file, but can't get the log file to use them in the name.
so I have:
Using strDATA As New StreamReader(DATA_FILE)
Do While Not strDATA.EndOfStream
Dim eng As String() = Split(strDATA.ReadLine, "=")
[Code]....
PATH and WORK_ORDER are declared as Public earlier on as are PATH, LOG, TMP and CSV, this sub is also Public. I also need to use the log writer in other subs as well as WORK_ORDER and DEVICE.
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Jun 2, 2011
I am trying to read the content from a .csv file and storing it in a variable. Later I am writing that content into a newfile. Code is executing successfully but the data is not appearing in new file. Here is my code:
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Mar 5, 2012
I have 2 programs.
Prog1.exe is in folder1
Prog2.exe is in folder1/subfolder
When I execute this in Prog1,
Process.Start("subfolder/Prog2.exe")
Prog2 runs.
But...When I execute this in Prog2,
Dim sw as new streamwriter("1.txt")
sw.write("something")
sw.close
1.txt is created in folder1, and not subfolder.
I can do a easy workaround by passing the full file path when creating the streamwriter, but I just want to know if it's a bug or what.
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Mar 25, 2011
Here's my code to add new lines to my text file:
[Code]...
When the button is pressed the line is written to the file just fine, but if I restart my application, which calls Refresh_OtherLog() onLoad, it displays the lines of the text file as one line with the traditional square character depicting a character return. Why is it not putting that new lone as a new line in the listbox?
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May 15, 2012
I am writing each line to a text file:
Dim objWriter As New System.IO.StreamWriter(filename)
For Each x In tofile
objWriter.WriteLine(x)
Next
objWriter.Close()
Which works perfectly the only problem is is that when its finished it writes a blank line on the end of the text file which I don't want.
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Oct 26, 2010
I have an issue with StreamWriter class. Basically, in an application running as a web service, I need to write info into a log file. When I send 2 web service calls simultaneously, the entries created in the log file are not correctly written. For example,
in call #1, ID 1 - xyz is to be written to the log file. In call #2, ID 2 - abc is to be written. When I viewed the log, it shows ID 1 - xyz & ID 1- abc. Looks like there's some memory data being shared and mixed together, even though it's totally 2 separate web service calls. From my understanding, each call (i.e. each will be process under a different application instance) should have its own set of memory allocation for data processing... If I am to make this application as a Console Application, it looks like everything is processed correctly.
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