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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I just need to know what is the slight difference between them so I know which one to use everytime.
View 5 RepliesI used WriteAllText to set the encoding for a text file. When I wrote it, everything worked out fine. However, strange characters or symbols appeared in some ofm y fields without my having typed it. why is this so? The encoding I'm using is UTF8. I used the WriteAllText to write the fields to file but did not use the ReadAllText to bring the data back into the fields or program.
View 2 RepliesBasically I am saving text to 2 seperate ini files, also saving the checkbox.checked value so my form can skip the login and auto start. My only problem is when a user saves the information to the INI files after writing them they automatically open up the INI files for display. When the form loads it automatically fills in the fields and if the checkbox is active it checks all the correct details then starts, only problem is it loads the checkbox1.checked ini file then starts the main menu. How can I skip this? and make it not show the ini files everytime they are called upon?
Dim aINIpath As String
aINIpath = "User.ini"
If File.Exists(aINIpath) = False Then
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Basically when I open test123.txt it should countain "Hello World" but not really, only " World" is there.
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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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"???
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.
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:
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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]....
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.
View 14 RepliesI 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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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?
View 9 RepliesIn 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]...
View 2 RepliesIn 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]....
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
View 2 Replieswhy 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]
View 7 RepliesI 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
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
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, "=")
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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.
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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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.
Here's my code to add new lines to my text file:
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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?
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.
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.
So, im using streamwriter and i want to create a folder and then save the text file in that folder.Here is the code im using right now.Imports System Imports System.IO Public Class Form1 Dim nr As Integer = 0
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Using sw As StreamWriter = New StreamWriter(DateAndTime.Now.ToShortDateString & ".txt")Add some text to the file.
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i have a windows form created using vb.net 2005 that allows users to attach files. When the user clicks the AttachFile button, they browse to select a file they want to attach and then the code places the file they selected into a predetermined location. The primary file type they will be attaching is a windows meta file (.wmf).
The attached file is saved and appears as a hyperlink for the user to open at a later time. When the user clicks to open the file, it is suppose to insert it into Autocad; however, it wasn't doing this.
The problem comes from attaching the file using the StreamWriter for some reason its not working correctly. I verified that this is the issue: When i hardcoded the file path to the original file's location, it opens up just fine when clicking the hyperlink. When I compare file size from the original to the one attached, I see that the original is 12Kb and the one I attached is 19Kb.
Here's my code to attach the file: I'm thinking perhaps it has something to do with this line? sReadFile = sr.ReadToEnd() but I'm just not sure. I tried changing this line to sr.Read but that doesn't work either.
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I'm looping through a csv file. For each line, I'm reading certain values, generating a filename, and writing the record to that file. Here is some logic
If <something that doesn't matter happens> Thendo somethingElseIf File.Exists(strOutFile & (strOutputFileName & "__" & strPrefixFileName & ".txt")) Then
strFullFileName = strOutputFileName & "__" & strPrefixFileName & ".txt" '** Double Underscores after app name
tsOutfile = New StreamWriter(strOutFile & strFullFileName)
[Code] .....
Now, obviously with the above code, there's no reason for the elseif, since they both do the same thing. The problem, however, is if I need to create a new file and write to it, everything works fine. In fact, everything will work perfectly until I need to write to a file that I already created. If I go ahead and just try "tsOutfile = New StreamWriter(strOutFile & strFullFileName)" and point it to the already existing file, I get a permission error (says the file is already open). Is streamwriter keeping an open connection to all of these files that I create? Nothing else in the program is touching these files, only streamwriter.
Here's a quick example to illustrate what is happening
Record 1 goes to file A
Record 2 goes to file A
Record 3 goes to file A
Record 4 goes to file B
Record 5 goes to file B
Record 6 goes to file B
Record 7 goes to file C
Record 8 goes to file A (Error will occur here)
I need to process a text file created by a Streamwriter. I have the Streamwriter object but the file location is determined by the user. The problem is, I need to process *the file* not the contents-so I need the location.
Steamwriter doesn't seem to have a Location or File property. Or am I just missing it? How can I tell what file a Streamwriter object is writing to?
I have a subroutine that needs to accomplish the following things:
1. Open wordpad (wordpad.exe) - so the user can see the file being written to for printing purposes.
2. Create wordpad file (Sample.wri)
3. Write various text to Sample.wri (in the wordpad window that opened) using Streamwriter. Again, this is for printing purposes.
The code below is the start of the subroutine. As it is written, Wordpad does start, and Sample.wri is created. But the streamwriter DOES NOT write the "does this work?" text to the file created, nor does it display in the window that opened when wordpad process started. I'm new to using streamwriter so I'm sure I've overlooked something simple. The start of my subroutine is below:
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