Reading, Then Using, Then Reading Text File?

Jan 2, 2010

I am working on a project in VB 2008 and need it to do this:Read first line from text file (using Openfile)Enter line into textbox on formDo some other codeThen Read second linefrom text fileEnter line into same text boxand loop until we have gone through text fileI am not sure how to read line by line from text file then enter it in textbox. I can open the Openfile and get the filename and everything, but I just am not sure how to read from it or enter that line into the textbox.Here is what I have, its not much but its a start:

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim FileReader As StreamReader



Reading A Text File

Jan 25, 2010

I have a fixed width delimited text file, the data spans over several line. I do not know how to approach in reading this file and displaying its results to a gridview.


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Reading A Text File?

Nov 29, 2009

How could i echo individual lines?, Like for example if i want to echo the hostname line, How could i just echo 'Christopher's Testing server', and not the hostname part too?

echo Executing Server Config...
lanmode 1
rcon_password changethis
password password321
maxplayers 20


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Reading From A Text File?

Jun 10, 2011

why this doesn't work?

Public Sub LoadFile()
Dim file As StreamReader
Dim temp As String


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Apr 30, 2010

got this code where users created txt file with email address and password [code]

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Reading From Text File?

May 29, 2012

I want to know how you would read in from a text file line BY LINE with timer and put it in a Listbox. Lets say I want to read this text from text file


Now i set the timer interval 300 and debug, i expect this to put each number in the listbox. I tried doing this but i failed

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Reading Text-file From CD?

Jun 26, 2010

I want to check if a textfile is in a CD, read the file, and if it contains the text "blahblah", do something. If it doesn't, MsgBox("Error!"). :P I only know how to open and close the CD drive. >_<;


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Reading A Specific Line From A Text File And Displaying It In Individual Text Boxes?

Feb 16, 2010

I've been writing a weight program for flooded pressure vessels and I'm having trouble retrieving the data from the text files I've been saving. I know how to write the data to the text file, but retrieving it with OpenFileDialog is not so easy for me.The user has individual text boxes that they input strings or numbers into and when they save the file, each text box input is written to one line in the text file. For example, the first text box is for the username, therefore the first line of text that is saved is the person's name, the second text box is the customer, thus the second line in the text file is the customer name, and so on.

(Actually, the first line of text in the saved file designates whether English units were used or Metric units because when the user retrieves the saved file, English units will open one form and Metric units will open a separate form, so some If...Then statement will need to occur).I need to be able to read the first line, have either my "EnglishForm"form open or my "MetricForm" form open, and then have each subsequent line of text be displayed in their corresponding text boxes. I know I need to use ReadLine or LineInput, but I don't have a clue what to do.Assuming the syntax I've displayed below would just magically work (if only life were that easy), it would look something like this

If FirstLineOfTextInFile = "English" Then
ElseIf FirstLineOfTextInFile = "Metric" Then[code]....

And so on...I read a lot of articles from the MSDN library and exhausted each link that I've looked through from Google and Bing, but most only retrieve data from the file to a single text box through some loop or streamreader and don't take into account multiple forms.

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Forms :: Reading File, Split Text And Write To Text Boxes

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


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Error In Reading A Text File?

Feb 26, 2012

In my project i read text file line by line by checking with a specific word and store that line into textboxes.

My code id

Dim fName As String = " Z:\rdf1.txt" 'path to text file
Dim testTxt As New StreamReader(fName)
Dim allRead As String = testTxt.ReadToEnd() 'Reads the whole text file to the end


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Looping In Reading Text File?

Oct 14, 2011

Here is my code for splitting "," from the text file. But the problem is I don't know how to include looping in the code to make the code read the whole text file. when I run this code, it's only read the first line of the text file.

Dim sr As StreamReader = New StreamReader("C:\drill.txt")
Dim data As String()
data = sr.ReadLine().Split(",")


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Performance Reading Text File?

Jun 14, 2012

i have this simple code from a project:

Using sr As New StreamReader(NewSwitch.ActFolder & NewSwitch.ActSShowName)
worker.ReportProgress(LoadSwitchProgressType.Normal, "Loading Active SupportShow, size " & NewSwitch.ActSShowSize & "...")
NewSwitch.ActSShowData = sr.ReadToEnd
End Using

Obviously it reads a file - a 20M text file to be exact. Now if this 20M file is on my PC, it reads in about a second. If i open this same file in a text editor, such as Conext, its about the same.However, if this 20m File is on a network location, the Context text editor loads the file in about 1 min 40 seconds. I would have expected similar times with my code, but it took 7 minutes 45 seconds.I have no idea what the text editor uses to read a file, but i figure i must be able to get similar time in somehow.

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Randomizing The Reading Of A Text File

May 21, 2009

I am creating a hangman game for a class prject. I have done everything apart from randomising the word that is loaded in. I have tried a few different types of code but just can't seem to get it. I have tried this:


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Reading A Text File And Using A For Loop

Sep 16, 2010

I'm trying to create a program to read a file and create a table. Public Class Form1


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Reading A Text File Into An Array?

Mar 1, 2012

Im doing some work right now for a class and this is my first time ever using arrays and im having some trouble. I need to make a program that places the names in an array using a text file and displays all presidents for a requested range of numbers. every time i try and run the program it says "Object reference not set to an instance of an object." but im not really sure what that means, Heres the code

Public Class frmPresidents
Dim numLow As Integer, numHigh As Integer, Pres() As String
Private Sub btnPresidents_Click(ByVal sender As System.Object, ByVal e As


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Reading A Text File While A Process Is Using It

Jun 30, 2012

I am trying to create a program that will refresh a *.log file within the program itself (in a RichTextBox), but while the actual application that is writing to that *.log file is open and is utilizing that file as well.

I have tried multiple things with StreamReader, but I can't seem to get anywhere...

Simply, I want to be able to read a *.log file in my Visual Basic 2010 program, but while the actual application that is writing to it is running itself.

How can I do this, as I keep getting the error that another process is utilizing the *.log/text document?

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Reading A Very Large Text File?

Jan 30, 2012

My problem is I have very large text files (approx 2GBs+).They have records in them based in one per line.Each line is not the same length and the data can be different lengths all the time.I am currently reading the file line by line, then splitting the data by common characters in the records. To process the full file it currently takes 3hours. This is way too slow for its purpose.

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Reading A Word From Text File

Nov 11, 2010

Here's some information on how you'd read it. First, you'd read in the file, where inFilename is the path to your text file, using FileStream to access the file, and StreamReader to read the data from the text file:


Next, you'd read the data from the text file into a string array, splitting the array on each new line character. (Each line in the text file is a new member of the array)


Now that you're done reading in the text file, you can close the streamreader and filestream so that the text file isn't still using resources or holding any type of lock(s) on the file


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Reading And Writing A Text File?

Nov 23, 2011

how to read and write a text file in

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Reading Data From Text File?

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.


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

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Reading From A Text File To A ListBox?

Mar 20, 2009

I need to read the contents of a text file to a list box. The coding I am using at present is:

Imports System.IO
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load


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Reading From Text File In Code?

Aug 31, 2010

Using Microsoft Visual Studio 2008: ' Create an instance of the open file dialog box.

Dim openFileDialog1 As OpenFileDialog = New OpenFileDialog
' Set filter options and filter index.
openFileDialog1.Filter = "Text Files (*.txt)|*.txt|All Files (*.*)|*.*"
openFileDialog1.FilterIndex = 1


On the line marked, how can I pass the path of the selected file into the StreamReader constructor?

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Reading In Data From A Text File?

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))


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.

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Reading Large Text File?

Jul 6, 2011

I've a problem reading text file using StreamReader. The file have between 500 000 and 1 000 000 lines.When I try to read it in a cycle, I get an error. That's why I've tried the StreamReader.ReadToEnd method. It worked fine. I've get the entire contents of the file in one string. So far everything is okay, but I've a small problem searching this huge string. I have to reformat the string to my desired format. I'll try to be more specific: The format of  the input file is as follows:

50471100 8 2 6 5 0<LF><CR> 
00000016 365442 12231<LF><CR>
00000026 112166 31133<LF><CR>


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Reading Lines In A Text File?

Dec 1, 2008

I am trying to read a specific line from a text file and for some reason when I set my variable loopCounter = 1 To 5 it jumps all the way down to the word "Marty" in my text file but if I just change loopCounter = 0 To 5 it jumps to where it should be which is the letter "M" right after "25". I'm trying to get it to read "25". as this is an assignment for a VB class I'm taking. My text file is at the bottom.

Do While readFile.Peek > -1
For loopCounter = 1 To 5


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Reading Next Line Of Text File?

Sep 28, 2008

How do I make my program read the next line of a txt file instead the first line.

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Reading Only Certain Data In A Text File

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.

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Reading Parts Of A Text File?

Oct 4, 2010

I want select portions of the file and then display them on my site,I thought maybe a combination of objReader and a do loop of some description with a delimiter in the text file to indicated when the program should start or stop reading the file.

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Reading Pieces Of Text From Txt File?

Mar 11, 2010

I am currently working on a program that edits txt files but it's for a game. There is a file that contains information that the client uses. This is what the file looks like:

|piece of code here|another piece|and another piece|
|piece of code here|another piece|and another piece|
|piece of code here|another piece|and another piece|
|piece of code here|another piece|and another piece|
|piece of code here|another piece|and another piece|

I want to make a program that reads this file and reads each piece of code separately and places them in different places like this:


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Reading Text File From Directory?

Jan 30, 2012

I have 4 directories, each directory contain 1000 text files. what i want to do is read all text files in the 4 directories then save them to 4 array of sting. i.e each directory of text files in on array of string.

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Reading Text File Into Array?

Jun 26, 2011

So I am trying to learn and am a beginner. I find alot of online tutorials, but have yet to find one where I can follow what I'm attemping to do, just bits and pieces. I want to keep the code basic until I learn more, and in this case use two - one dimenstion arrays. I built a program to write Employee Names and Wages to a txt

Jack Black vbtab 60000
Nick Mole vbtab 45000
and so on

I want to bring back that data and place the name and the and wage each into an array so I can calculate different criteria when I hit a search button. I will not know how many names and wages will be written to txt file. I am having trouble understanding exactly how to do this as all the examples I've found list only one array or the txt file is line by line like.

Jack Black
Nick Mole

Everything else I've found is over myhead so far.Here is my code so far if anyone can let me know where I'm going wrong. I have one error that tells me "property chars is read only". I have no idea what that means, even after reading up on it really...and I'm not sure if the rest of the code I've wrote is 100% anyway I assure you that I've spent more than a few hours trying to solve this myself.


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Reading Text File Into List Box?

Jun 10, 2011

I have been having some problems with my Visual Basic. In trying to figure that out, un-installing, and reinstalling, running virus scans, etc, I have lost a lot of my time to get this assignment done. I would just keep messing around with it and try to be further along, but I must move on.

We have a form application with 3 tab pages. The first tab page takes input for first name, last name, phone, birth month, and birth year in textboxes. This info is to be written to a file. The next tab page has a read button that then displays the data into a list box. The next tab page has a text box to take input for a birth month and then searches through the file and lists any file that matches that birth month.

The whole thing then needs to be serialized and deserialized.I will post what I have so far. My first question is what do I need to do to get it to read into the listbox? I have tried multiple things. None work. After the issues I had with my visual basic, I don't know if for sure it is me, (most likely), or the software.For the display, we are supposed to use an overloaded ToString method in another class. Do I have to use an array?

private void EnterFriendBtn_Click(object sender, EventArgs e)
friend.FName = Console.ReadLine();
friend.LName = Console.ReadLine();


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Reading Text File Into ListView

Feb 17, 2009

I currently have this:
Private Sub Button1_Click_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnImportProxy.Click
If (CheckBox3.Checked = True) Then
' Displays a OpenFileDialog so the user can load the proxy .txt file
' This one shows the user which types of files ar eallowed to open .txt
[Code] .....
But what I was after was to put the contents of the .txt file into the list view I can't seem to get it.

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Reading Text File With Given Coordinates

Apr 28, 2011

I have a problem related to a project work of field observations of points. So I have a text file (file.txt) of coordinates X and Y of vertexes (separated by a comma like below):
X, Y
12.2 , 13.1
15.4 , 19.3
13.6 , 12.5
(and so on to 15 lines of x's and y's)

I need a program which can read this text.txt file with the given coordinates and store them as 2 generic lists using Loop and Split function and also the program should display the data read from text.txt file into a multiline text box. Next the program has to use the 2 lists to be passed to a function that first calculates the average values for the coordinates X and Y, and then work out the areas of triangles by = 1/2 SUM [ (xb-xR)(ya-yR)-(yb-yR)(xa-xR) ] where x/y ''a'' is the current vertex and x/y ''b'' is the next vertex in the polygon. I presume the program has to loop around the whole polygon to vertices to summing up the areas of the triangles and at the end multiply by 1/2 and give the positive modulus or ABS() of the area.

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Reading Text From File Into Array?

May 29, 2011

specifically reading from a text file, and placing that into an array.

But the problem is, that in each line of the text file, I have at least three different separators.



So, what I want to do, is read each line of the text file into a separate item into an array, and each item in that array is a record of another array(of terms) and a single(constant).

I've already got SOME code, but I'm pretty sure it's not going to work, and I don't know much about reading from text files and string manipulation in the first place.

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Reading Text From File With Delimiters?

Dec 21, 2010

I've been using VisualBasic 2008 Express Edition for a little while now, and I've gotten the hang of a few things like nesting and basics like that. I love learning everything I can about it, and so I'm working on a program that's got some things I'm not so familiar with involved. I'm not sure exactly what it is I'm looking for help with; as I'm sure some of you may know, there are many different ways to accomplish the same task--it's just that we don't always know the simplest solution, unfortunately. So anyhow, I'd like this program to do a couple of things... Firstly, to read in data from a text source and display it accordingly, and also to use that data in a list box and compile a new list from the original one.I've got a rather vague idea on how to do the first objective to put it nicely.I've read a little about delimiters and such, but the problem is that everywhere I look for tutorials or examples, I'm not really seeing exactly what it is I'm trying to do.Here's an example of the text I'm trying to parse/read/whatever it is:|Name of thing|some data|blah|blah blah|

In this example, I use the vertical bar character (I don't know what it's called; it's Shift + for me) to separate data in a pre-defined order. Let's say I wanted to use this for car information, I guess.[code]Like that, only many more times. What I can't figure out though, is A.) how to make VB read every line within the text file and B.) how to differentiate each of those sets of data so that I can read them into labels on the form. At this point, all I do know is that that vertical bar (this thing) is what's called the delimiter. Other than that, I'm left to pulling my hair out.

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Reading The Last Line Of A Text File?

May 16, 2012

I've been trying to read the last line of a text file but the code i have done seem to be giving me errors, i'm not sure what i've done wrong.

Public Shared Function ReadLastLine(path As String, encoding As Encoding, newline As String) As [String]
Dim charsize As Integer = encoding.GetByteCount(vbLf)


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Sorting After Reading Text File?

Jul 1, 2009

I would like to sort out the repeating lines after reading the text file.

For example i would like to sort:

LIBRARY [2009/6/15 15:02:14, 2009/6/15 15:02:14] temp.gds
UNITS 0.001 1e-009


How do i continue from here to sort the textfile to get what i want?

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StreamReader Not Reading To End Of Text File?

Jan 6, 2011

I'm trying to read through a large text file using StreamReader using the following code

Dim Fs As FileStream = New FileStream(Filename, FileMode.OpenOrCreate, FileAccess.Read, FileShare.Read)
Dim sr As New StreamReader(Fs)
Dim Line As String = ""


The process reads through the file and then exits the loop while only a third of the way through the file.What can I do to ensure it reads the whole file?

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Text File Reading Top Part First

May 29, 2009

I have a text file to read.It contain two part: Bottom and top i must read the top part first and match that line with bottom part. and write all the matching lines in another file. The thing that i must matc is from the value in () and from bottom value []. For example the value must Be like this (1234)[1234]. After i find out the values i must copy the whole line from both part than write to another file. For know i can read the value in() from top part copy the whole line but from bottom part i only can get value in[] and can not get whole line from bottom part.


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