Reading And Writing Data To A Text File?
Sep 28, 2009
The program that I am writing has three default variables that I would like it to store and also be able to change. I have them in a text file called "settings.txt" The format of the text file is as follows:
Default Source "I:DCIM101MSDCF"
Default Destination "C:Documents and SettingsChristyMy DocumentsMy Pictures"
Default Backup Destination "D:My DocumentsBackupMy Pictures"
The field descriptions eg "Default Source" take up 30 characters, so the variable data starts with character 30. I know their has to be an easy way just to pull out the data from a particular line starting with character 30 but I can't find it.
View 6 Replies
ADVERTISEMENT
May 3, 2009
Even a primer on just reading/writing to a text file would be golden. The array confuses me further, but understanding the data is primary.
Basically, we're writing a program to manage inventory for a bar. Fields and a few lines are below. The delimiter is "||"
So... How do we read the data into the arrays? NAME would be strName(), etc for all of them.
how to write and update existing data.
UID||BREWERY||NAME||SIZE||FORMAT||SEASONAL||PRICE||CASECOST||CASEQTY||BREWERYLOCATION||BREWSTYLE||ST YLE||ABV||CLASS
A0101.12B||Abita Brewing Company||Abita Amber||12
[Code].....
View 2 Replies
Nov 23, 2011
how to read and write a text file in vb.net
View 7 Replies
Mar 28, 2010
How would a person read a line of a text file by the number of the line. In other words, if I wanted to get the 3rd line of the file, how could I store that third line in a variable. While I'm at it, I might as well also ask how to do the opposite, or write text to a specific line (in this case, writing over the other information on the chosen line).
View 2 Replies
Jan 30, 2011
I am trying to write the TOURN structure and then read the TOURN structure back in.. the file gets created on my desktop and the program does not have any syntax errors, but when I READ the file none of the Data gets retrieved. So I am not sure if the DATA was actually saved or it is just not being retrieved?? This is what I have coded so far...
[Code]...
View 2 Replies
Oct 7, 2009
I'm using visual basic 2008 express to do some simple stuff. For this project, Im reading in one large text file.The top of each page has a header section that is always the same, except sometimes a dept# changes, signifying a new set of data.The first line always has the text "RunDate", so when I read that, I know that I'm at the top of the first page.After reading the first line, I'd like to immediately go to the sixth line and grab that dept# and store it.dept = left(trim(myline,7)(Its always 7 characters long) so I know what dept I'm working on.I'll then loop through and write each line to a new text file, until I hit the top of a new page.At that point I need to look at line 6 again. if the dept # is the same, I'll keep writing to the same file.Reading and re-writing from the text files is easy, I just loop through line by line, but I need to be able to jump down to the 6th line, and I don't know how to do that without reading each line to that point"
View 2 Replies
Mar 25, 2012
I'm writing a program where there are text boxes and the user can enter info and append them to a text file as well as read from the text file and view the various entries in it. The problems I'm running into are that I have a button that opens an open file dialog box allowing you to select the file, and I want to get it to open the first entry of that file in the correct text boxes. the code so far looks like this
code:
I used to have this bit of code in there but there was a conflict with the .txt file being used more than once at the same time while it was in there.
code:
Im also having trouble writing to the file and I'm not sure why. I have an "Append" button that has this code in it
code:
and it comes up with the issue "object reference not set to to an object instance".
View 6 Replies
Aug 18, 2009
I have a 2 text files
Text file 1:
.ERR - Max6 Error file
[2 19.40 44.7] X6.950 Y-4.705 106.522, 222.048
Open -106.522, 222.048
[2 05.52 39.6] X7.720 Y5.010 214.550, 205.048, 101.078
[code]....
But it not writing anything as output..
View 1 Replies
Aug 18, 2009
I have a 3 text files
Text file 1:
.ERR - Max6 Error file
[2 19.40 44.7] X6.950 Y-4.705 106.522, 222.048
Open [code]....
From here i have to read the Node name which is MEM_B_DQ7.Then match node name with third file and get that node name group
Text file 3
NODE MEM_B_DQ7
PINS
View 1 Replies
Aug 17, 2009
I have a 2 text files
Text file 1:ERR - Max6 Error file
[2 19.40 44.7] X6.950 Y-4.705 106.522, 222.048 Open -106.522, 222.048
[2 05.52 39.6] X7.720 Y5.010 214.550, 205.048, 101.078 Open -214.550, 101.078
[2 07.69 39.2] X7.786 Y3.489 215.574, 214.075, 204.067
[Code]...
View 7 Replies
Nov 11, 2011
This is what i wanna do and dont really know how:
When i click button "StoreX":
if X.ini does not exist it will be created at the same folder as application
NumericUpDown1 value stored at X.ini line 1
[code]....
View 21 Replies
Dec 3, 2011
Their is a problem whenever I want to write something to a text file. Please see the attatchement to see what happens when I'm debugging. I've put the code for writing to file right at the end of the program.Here is some of the code which shows how the program writes to and reads from the file:
Option Explicit On
'Force all variables to be declared.
Imports System.IO
[code].....
View 2 Replies
Jul 18, 2010
I have just recently been using VB 2010 after using VB5. I have noticed a lot of changes. The problem I have is that I wish to open and save text files to and from arrays in the background. I've attached what I would do in VB5. I have searched around, but all the examples I find use a Textbox instead of an array. Can anyone show me how I can do this with VB 2010?
View 3 Replies
Mar 1, 2011
(First off all hi to everyone my first post!) Ok, i have two programs one program writes to a text file on a consistent basis, while the second program is opening this text file on a consistent basis for reading.. Sometimes the programs are accessing the file at the same time and the user keeps getting this error : this process cannot access the file because its already in use..
Is there any class, in system.io that i can use to modify the settings of this text file so both programs can access it at the same time?
View 2 Replies
Jun 17, 2010
I would like to know how to write to a text file that is added to resources and then have it show the contents in a text box.But I would like to have it on a timer so every second it will refresh as I am trying to make an instant chat program.Also I would like to note that I want it to delete everything after all the users have closed the program. Is there any way to make it so the text file is empty when there is no body using the program any more?
Public Class Form1
Private Sub btnSend_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSend.Click
[code].....
View 10 Replies
Apr 21, 2009
I'm trying to create a program that stores a users stats for their character (for something like an RPG). I know how to write more than one line in a text file, but I want to learn how to read and write text on specific lines of my file. I know that you can just read each new line individually in order using a StreamReader, such as
username.text = readLine.ReadLine()
userage.text = readline.ReadLine()
[Code]....
This is good for just displaying the stats and changing them from a constant interface, but I'm afraid that eventually I'll need to read/write specific lines, like reading the fourth line which might specify magic level, or writing a new money amount.
View 4 Replies
Aug 5, 2011
I have the same problem that Niphoet had in this thread: vb .net overwrite a specific line in a text file
I am trying to implement the code that Axarydax showed in C# that I am trying to translate to use into vb.net. My problem is that the code will make my new text file but will not write any of the lines from the other text file to it and just leaves it blank. I think my problem is with the while loop statement but I am not sure.
[Code]...
View 1 Replies
Sep 29, 2009
I'm reading a file into a buffer using the Space function. Then I'm using blowfish dll's to encrypt it, and want to write the encrypted data to a txt file. (I realize you can use .NET cryptography classes, but I need to use these old blowfish dll's for this project.) Anyway, when when I encrypt the data in the buffer, I can see all encrypted data, but when I write it out to a file, I get a few lines of encrypted data and the rest of plain text.
HTML
' BLOCK_SIZE is a const which = 2048
sBlock = Space(BLOCK_SIZE)
Using sr As StreamReader = New StreamReader(FileToEncrypt)
sBlock = sr.ReadToEnd()
End Using[Code] ....
View 4 Replies
Jul 17, 2010
I have just recently been using VB 2010 after using VB5. I have noticed a lot of changes. The problem I have is that I wish to open and save text files to and from arrays in the background. I've attached what I would do in VB5. I have searched around, but all the examples I find use a Textbox instead of an array. Can anyone show me how I can do this with VB 2010?
View 1 Replies
Feb 7, 2012
Im trying to get some particular content from a site and place it in text file. i have used a listbox for loop of urls i want to process and another to see output of data. now i want all data in text file each item seperated by "~" sysmbol.
Exmaple Link i used in my.txt file: [URL]
Data expected in text file:
Abbeville High School Basketball Stats ~ Team: Varsity 11-12 ~ Colors: Maroon, Gray, White ....
Imports System.IO.StreamReader
Imports System.Text.RegularExpressions
Imports System.IO
[Code].....
View 1 Replies
Jan 30, 2010
We have a directory with a list of PDF files.Each file name has an Employee ID (eg 001213.pdf). What I need to do is loop through each file name, grab the employee id (001213) and pass it to Oracle query. The query wilbasically retrieve employee data (Firstname, lastname etc).
View 3 Replies
Feb 17, 2010
I have been using this code, see below, to try and write data from the DataGridView to a text file. It works but it puts an extra comma after each line and thinks that there has been another line so puts an extra 4 commas on a new line. So the text file looks like this:
9,Here to There,1,15,
8,Hell to Heaven,16,34,
I'm looking for any help for a way to get rid of the extra commas or an entirely different way of doing this whole process.
[Code]...
View 9 Replies
Mar 11, 2010
Input File to read:
SAMPLE NO: 10S-02013
Moisture 10.1
[Code]....
I am not getting the right output I need, as whenever it reads a line, it looses my sample numeber.
View 8 Replies
Mar 3, 2009
so i have it so that the user input three initials and presses an enter button. Then it goes into a listbox where theusers initials and game score enter. I then have it transfer to a text file. all this works but i need some code toun through the text file and arrange them from highest to lowestheres my current "HighScore" codei know its going to be a for loop but im a beginner in vb and it would be so much easier in java button1 is the enter buttonbutton2 is the save button that saves to a text file
Imports System.IO
Public Class HighScore
Dim objStreamWriter As StreamWriter
[code]......
View 5 Replies
Jul 8, 2009
How do I make it read a text and write down file.
</script><span id="numbers">Random Number: 15</span><script type="text/javascript">
I can't really explain it but is like is reading "numbers" text.
View 8 Replies
Apr 9, 2009
I am doing the project to make a microcontroller communicate with PC. I am facing the problem writing the C++ code for command button to ask uC to display the data in my label. How to write the code for C++ to get the data from the microcontroller?
i'm using a C8051F320-dk which already have a USB connector and a RTC.
my data will be the date, and time provided from the RTC.
View 1 Replies
Mar 10, 2011
I will use this program for meter reader. Anyone can help me reading data from text file.. For example I want to get the data that i export from MySQL Database to Text file..
I have textbox to insert the acct number to search the name, and button1 to execute search, and another Textbox to store the name that have been search.
[Code]...
Data in zone6.txt ---- Acctnum, 06-12-057, LIZAcctnum, 06-12-058, MARK, Acctnum, 06-12-001, MICHAEL
Acctnum is the column 1, 06-12-057 is the column 2, LIZ is the column 3.. how can i get the name LIZ if i type the acctnum
View 4 Replies
Dec 4, 2009
Ive made a program that reads in data from a txt file that has 4 columns, but it doesnt work if there are headings to the columns or any other kind of text at the top of the file. I basically just want to be able to skip any text at the top of the file, either by the user specifying how many lines to skip, or by code that can calculate how many lines to skip.
At the moment, the code opens the file, calculates how many lines there are in the file, redims an array to this size, closes the file and then reopens it so its ready to have the data read.
This is how the data is input into the array at the moment:
ReDim data(lines, 3)
i = 0
While Not (EOF(1))
[Code]....
I was thinking a possibility would be to use a try statement so that if the data is a string, then it skips over that line, but i couldnt figure out how to put it together.
View 9 Replies
Mar 31, 2008
I am currently trying to write a program that will do the following. 1. The user will open a .txt file that needs to be converted into a CSV file. 2. The user will then click on a button to convert the file. 3. The program will parse the .txt file for the necessary data and will then write the data to a new CSV file. So far I am sure that I can write the code which will open the file and which will save the file to the new format. Where I am having problems is with the .txt file format that I have to work with. [Code]
Each field is fixed length with the empty space in front of the starting numbers being a field. I have been unable to find any code that would show me how to parse only certain data from this .txt file. What I need it to end up looking like is this: [Code] The program itself needs to be pretty simple as the .txt file will only have at most 25 to 30 records. I was thinking of using a StreamReader to read the data into an array, but I can't figure out how to get just the data I need out of each record.
View 3 Replies
Jul 30, 2009
I am witting an app that will generate batch files to do an unattended installation of a share point 2007 farm. I already have a batch file I use and it's pretty big. I copied and pasted the content into my application, and I'm using the System.IO.StreamWriter to write to the batch file from the winform. [code]As you can probably guess, I'm doing all of this in my mainform code window. There are maybe 3 or 4 batch files that will be generated based on the selections made on the form. For example, I'm generating a batch file to create the OU, Group and service accounts the farm will use in active directory, I'm creating a batch file for all of the variables that will be used for the additional batch files created, etc. How can I split this up? is there a way to create the batch files without having to actually copy, paste my existing batch file content into the mainform code window? I'm using file.writeline on each line of the pasted content by the way.
View 7 Replies
