Write Values, Mostly Doubles Into A Text File?
Sep 3, 2009
I need to write values, mostly doubles into a text file in VB.NET. I ported the code from VB6, but the performance of the VB6 write#fileID, vars) in VB.NET, is very bad, it introduces a delay of about one hour. I have tried out the streamwrite, and its performance is good; it's actually faster than VB6 write.
I am using the write(string) method for the streamwriter, and I am concatenating the values using variable names as follows: streamwriter.write(var1 &","& var2 &","&....&","& var n &","). This version of write enables me to have more than one variable written to file per statement. The problem that I have is that the content of the file is incorrect, unlike the one produced by the slow VB6 write in VB.NET.
Is there a better way of achieving this requirement; preferably using the streamwriter? I cannot use the streamwriter.write(double), becuase I'll have to use multiple lines as I am writing about 800 vars in convergence test loops resulting in a total of just over 2 million writes.
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Jun 2, 2010
Been trying to get somewhere with this in another thread, but no such look, just keep getting reffered back to the same documentation... If I understood the documentation, I would have fixed it by now:
vb.net
Private Sub MakeiSuitePwdFile()
Dim text As String =
[code].....
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Dec 27, 2011
I have a trouble making this code work. When executed, it just creates a correct (with the correct name) file with the extension .txt but the the actual text inside .
Imports System.IO
Public Class Form1
Public mytext As String
[code]...
The strange thing is that while debugging, h, t string variables have the correct values, but somehow mystream.write(t) doesnt work (it doesent write anything to my h.txt text file...
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Mar 2, 2009
I'm new to VB.net and have only a few projects under my belt. This one has me stumped!! I need to open a file and search its contents hex byte by byte. (Similar to Hex editor). On finding a particular value I need to replace it with a set hex value then write and close the file. So far I have only managed to read / write the ascii equivilant.
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Dec 3, 2011
I have several textboxes and one combobox in which I would like them to have them placed in a file, but I have run into several problems while doing it. I am taking a beginning course and the book doesn't seem to explain things to well.
1. How can I let the user enter a file name after the data and button has been clicked
2.How do get I get a information from the combobox to grab the text within the selected item to the file
3.How to I write the entered text value to the file like using the notepad file?[code]..
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Mar 28, 2011
I've been asked to re-write an application that was written sometime ago by another programmer. This application reads data from a database table, massages it, and then writes out the results to a text file that is later shipped off to another company. When I run my new application, it generates a file that, according to the byte count, is twice the size of the file output from the old application. However, to look at the two files with note-pad they look identical. I found that by using 'Ultra-edit' that the new records have a low-value byte hex '00' between each real character.
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Feb 15, 2011
I am new to VB.net
I have a simple form with two textboxes, I want Textbox1 to write to a file named C:VALUE1.txt and
Textbox2 to write its value to a file named C:VALUE2.txt
Any text that is already in the text file MUST be over written.
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Dec 3, 2011
I am trying to ping a text file("C:/Domains.txt") which is a list of domains, then have the resulting IP address written to a different text file ("C:/IP_Addresses.txt"). And this action will be done with a Button_Click.
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Sep 2, 2009
I have a very large text file about 4 million lines that I would like to separate into several small text files based on the strings contained in the first column of the text file. I want to open the large text file, choose the lines that apply, create a new text file with a name that has a number at the end of which will match up with the value in the first column of the text file. I want to then copy the applicable lines to the new small text file, save and close it. I'm not sure how to go about doing this after opening the large text file and using the readline method. What if the folder does not exist? Do we have to create it? I want this procedure to be general, as there could be up to 25 million lines in the text file.
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Jun 25, 2010
I'm trying to read a text file that contains info like this:
ACX-101-011 , J2168
BTXR-130A-013, D6733
AJ4-233-614, T8211
I want to split each line at the comma and write the left side to a textbox and the the right side to another textbox. I'm close, with the code below, but I can only post results from the first line in the file. How do I loop this and append the text results in each of the textboxes.
Dim TempFile As String
TempFile = "temp.txt"
Dim sw As StreamWriter
[Code].....
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Mar 10, 2011
Is it Possible for me to read text from textbox control and write it to .txt file at specific location.
for an instance.... say below with quote is my Text in .txt file:
"THE QUICK BROWN FOX JUMP OVER THE LAZY DOG"
and with programming code I want to change some text in the same sentance become....(see below)
"THE QUICK GREY FOX JUMP OVER THE LAZY CAT"
so you can see the word BROWN change to GREY and word DOG change to CAT
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Apr 7, 2012
I've been developing a arcade game, and as every good arcade game, it has an incorporated scoreboard so that players can see who scored better. My problem is that everytime it enters a new scoreline, it deletes all the previous lines in the text file. The code I've been using is the following:
If player1 > 25 Then
objReader.Close()
MsgBox("O " + jogador1 + " ganhou.")[code]............
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Apr 16, 2011
I've got a program which displays data in a listbox in five columns. All are separated using one or more ControlChars.Tab. I want to write these columns to a text file, however, when I do, my columns lose their alignment. I can change alignment so that it displays nicely in text file, but then it is off in list box. Is there a way to get what I see in my listbox to display the same way in a text file - maybe a different way of separating my columns (not using ControlChars.Tab)?
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Jan 16, 2012
its noobish question but i didnt find any solution for it here is my problem : i want to write bites from 2 seprated file (1.txt + 2.txt) into 1 single file(3.txt) but i cant
[Code]...
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Jun 23, 2010
I can not fiend any write functions to a text file or to a other file in Windows Direction
I want a simple write function for a button when click button it will write some lines to a file
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Dec 3, 2011
reading a text file and then taking the values from the text file and inputting them in an Access database. I don't know how to do most of it, but I decided to start by reading the text file. However, whenever I click the button to read the file, I keep running into my catch error exception. Help!
Here is the Private Sub ImportButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ImportButton.Click
Dim CustomerStreamReader As StreamReader = New StreamReader(InputOpenFileDialog.FileName)
Dim vCustomerString As String
[Code]...
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Sep 28, 2011
I am using Visual Studio 2008 on Windows XP SP3. User has Windows 7 Pro (32 bit). The IO code below works for me. The read code works for user, but the write code only works for new files. If the user tries to overwrite a current data file, then no data is written to disk. I have done all the usual IO checking (valid file name, etc.) and have excluded it from my same code. In my app, FileSave and FileSaveAs both call WriteDataFile(FullFileName). Any reasons why FIleSave would work on Windows XP, but not on Windows 7 Pro (32 bit)?
Code:
Public Function ReadDataFile(ByVal FullFileName As String) As Integer
' reads a Data file from disk
'
' Format is a text file, with [TAB] seperators and [CR][LF] as line terminators
[code]...
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Oct 7, 2009
I have a text file and I want to take the data from the text file and write each line into the excel file (into the same column). How do I accomplish this? I know how to read data from a text file, but I don't know how to insert the data to a excel file..
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Nov 6, 2011
[code]I just want it to change item format in listbox (IP: 0.0000.0000.000 PORT: 8080 to 0.0000.0000.000:8080) and write that line to a text file located on desktop!
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Jul 26, 2009
I have to save the text boxe values of a form to a text file almost like a data record. I will be saving an Employee First Name, Last Name, Dept Number, and Phone Number. This I know how to do using streamwriter.
next form which we have to use stream reader to load one record at a time. The form has a next button to load the next record. How do I seperate each record (I am sorry for calling it a record if this is inappropriate) when use streamreader and how do I load a record at a time.
I know how to open a file and use streamreader, I just don't know how to read one record at a time and move to the next one.
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Aug 27, 2010
I am trying to write to a text file....which is fine but thers a but!I want to output date so it is all aligned for example
Name Age
John Smith 35
Danielle Johnston 37
As you can see the above data is not aligned!! VBTab doesn't work as depending on the length of the name the file looks like above I want the text file to look like
Name Age
John Smith 35
Danielle Johnston 37
so everything is aligned!
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Jan 24, 2011
How can I write a string to a file without having to call on stream reader?Well, If it is not worth it, it is not fun - you say programmers are boring but i say they are worth it.
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Oct 21, 2009
I added a Text File into my project using Project>Add new Item. How would I write text to that file?
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Nov 14, 2011
How can i write text to the end of a text file?
I mean instead of creating a new file each time my app run ,i want to add text to the end of that text file.
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Jul 19, 2010
I would like to write a string to a text file I have created on the C: drive. I want to get the string from the .text value of a control and save it to the text file. I have 8 different strings I want to save using a click event. I then want to be able to read the text file and write the values back to the control. I am doing this to make information the operator has entered retentive, in case of a PC shut down.
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Jun 4, 2009
I want to write the user input data to the text file. I want it to be in same line like this
G1 Z1. F80.
If i use my coding like this is not working[code]...
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Apr 26, 2009
I Am making a Soccer League tabel with player names.With All the Names:The first Digit is either T(for Team) or G(for Goal).
[Code]...
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May 5, 2012
I want to create a text file and write some text into this file, but my code cannot create the text file.
Error message:
UnauthorizedAccessExcepion was unhandled by user code Access to the path 'c:save.txt' is denied.
My code:
Dim fileLoc As String = "c:save.txt"
Dim fs As FileStream = Nothing
If (Not File.Exists(fileLoc)) Then
[code]....
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Mar 16, 2010
I'm creating a small vb.net application, and I'm trying trying to write a list of results from a listview to a text file. I've looked online and found the code to open the save file dialog and write the text file. When I click save on the save file dialog, I receive an IOException with the message "The process cannot access the file 'C: hethe.txt' because it is being used by another process." The text file is created in the correct location, but is empty. The application quits at this line "Dim fs As New FileStream(saveFileDialog1.FileName, FileMode.OpenOrCreate, FileAccess.Write)"
Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click
Dim myStream As Stream
[Code]....
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Mar 25, 2012
[code].....
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