Reading and writing text files is an essential task in any programming language. Follow this step-by-step approach to working with text files in VB .NET.

Years ago, when I first learned to program in BASIC, I came across a sample program for reading a text file. The OPEN command with the file number looked quite confusing, so I never wrote the program. Later, when I learned Visual Basic, I was shocked to see that the same file operations existed in VB. The basic file-handling commands had not changed; just a few more features had been added.

With Visual Basic .NET, Microsoft introduced a new, object-oriented method for working with files. The System.IO namespace in the .NET framework provides several classes for working with text files, binary files, directories, and byte streams. I will look specifically at working with text files using classes from the System.IO namespace.

Basic methods
Before we jump into working with text files, we need to create a new file or open an existing one. That requires the System.IO.File class. This class contains methods for many common file operations, including copying, deleting, file attribute manipulation, and file existence. For our text file work, we will use the CreateText and OpenText methods.

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CreateText
True to its name, the CreateText method creates a text file and returns a System.IO.StreamWriter object. With the StreamWriter object, you can then write to the file. The following code demonstrates how to create a text file:
Dim oFile as System.IO.File
Dim oWrite as System.IO.StreamWriter
oWrite = oFile.CreateText(“C:\sample.txt”)
OpenText

The OpenText method opens an existing text file for reading and returns a System.IO.StreamReader object. With the StreamReader object, you can then read the file. Let’s see how to open a text file for reading:
Dim oFile as System.IO.File
Dim oRead as System.IO.StreamReader
oRead = oFile.OpenText(“C:\sample.txt”)
Writing to a text file

The methods in the System.IO.StreamWriter class for writing to the text file are Write and WriteLine. The difference between these methods is that the WriteLine method appends a newline character at the end of the line while the Write method does not. Both of these methods are overloaded to write various data types and to write formatted text to the file. The following example demonstrates how to use the WriteLine method:
oWrite.WriteLine(“Write a line to the file”)
oWrite.WriteLine()         ‘Write a blank line to the file
Formatting the output

The Write and WriteLine methods both support formatting of text during output. The ability to format the output has been significantly improved over previous versions of Visual Basic. There are several overloaded methods for producing formatted text. Let’s look at one of these methods:
oWrite.WriteLine(“{0,10}{1,10}{2,25}”, “Date”, “Time”, “Price”)
oWrite.WriteLine(“{0,10:dd MMMM}{0,10:hh:mm tt}{1,25:C}”, Now(), 13455.33)
oWrite.Close()

The overloaded method used in these examples accepts a string to be formatted and then a parameter array of values to be used in the formatted string. Let’s look at both lines more carefully.

The first line writes a header for our report. Notice the first string in this line is {0,10}{1,10}{2,25}. Each curly brace set consists of two numbers. The first number is the index of the item to be displayed in the parameter array. (Notice that the parameter array is zero based.) The second number represents the size of the field in which the parameter will be printed. Alignment of the field can also be defined; positive values are left aligned and negative values are right aligned.

The second line demonstrates how to format values of various data types. The first field is defined as {0,10:dd MMMM}. This will output today’s date (retrieved using the Now() function) in the format 02 July. The second field will output the current time formatted as 02:15 PM. The third field will format the value 13455.33 into the currency format as defined on the local machine. So if the local machine were set for U.S. Dollars, the value would be formatted as $13,455.33.

Listing A shows the output of our sample code.

Listing A

   Date         Time                   Price
   22 July     10:58 AM           $13,455.33


Reading from a text file
The System.IO.StreamReader class supports several methods for reading text files and offers a way of determining whether you are at the end of the file that's different from previous versions of Visual Basic.

Line-by-line
Reading a text file line-by-line is straightforward. We can read each line with a ReadLine method. To determine whether we have reached the end of the file, we call the Peek method of the StreamReader object. The Peek method reads the next character in the file without changing the place that we are currently reading. If we have reached the end of the file, Peek returns -1. Listing B provides an example for reading a file line-by-line until the end of the file.

Listing B

oRead = oFile.OpenText(-C:\sample.txt")

 While oRead.Peek <> -1
       LineIn = oRead.ReadLine()

 End While

 oRead.Close()


An entire file
You can also read an entire text file from the current position to the end of the file by using the ReadToEnd method, as shown in the following code snippet:
Dim EntireFile as String
oRead = oFile.OpenText(“C:\sample.txt”)
EntireFile = oRead.ReadToEnd()

This example reads the file into the variable EntireFile. Since reading an entire file can mean reading a large amount of data, be sure that the string can handle that much data.

One character at a time
If you need to read the file a character at a time, you can use the Read method. This method returns the integer character value of each character read. Listing C demonstrates how to use the Read method.

Listing C

Dim intSingleChar as Integer

 Dim cSingleChar as String

 oRead = oFile.OpenText(-C:\sample.txt")

 While oRead.Peek <> -1

 intSingleChar = oRead.Read()

 ' Convert the integer value into a character

 cSingleChar = Chr(intSingleChar)

 End While

Tap into the power
We've barely scratched the surface of the new file functionality included in .NET, but at least you have an idea of the power now available in the latest edition of Visual Basic .The abilities of the classes in the System.IO namespace are quite useful, but if you want to continue to use the traditional Visual Basic file operations, those are still supported.

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Comments

1

soma - 13/07/04

also provides some codes for reading the text line by line.

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2

nick - 19/02/05

wow this is great ivebenn looking for this code for ages

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3

Ted Tomany - 07/05/05

Very informative article. Helps me a lot.

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4

Howard Simon - 10/05/05

First of all, thanks for taking the time to place pieces of code on the internet such that people like myself can use other's knowledge to program. However, I am running into a problem. This method, along with the Print #1, allowed within VB in Excel macros is limited to ~32K size. What method can be used in an Excel macro environment that would exceed the 32K limitation?

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5

asdf - 11/05/05

This has been a great help. However how do you "attempt" to read from a file. In other words how do you handle an exception when no file can be found?

Say if i want to open a file called "asdf.txt" but only if it exsists. If I try and do it with your code my program just crashes if it doesn't exist.

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6

Andrew Kong - 15/11/05

I find your articles really helpful but I am trying to find out some more info about this readline() method...

I want to open a text file and search for a specific character in my case a "=". I also want to see if there is a string of characters beyond the =. The text file has many lines some with characters beyond the "=" some without...I want to count the amount of lines with characters beyond the "="

If you can help it would be greatly appreciated

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7

Hany Mousatfa Khodair - 17/11/05

That was really helpfull and mostry Focused
Thank you very much

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8

Gourisankara - 18/11/05

Hi every body,
i am developing VB.det post, how to call .txt file in my application.I tried this way but i didn't get the answer.
This is my code:
Dim EntireFile As String
read = File.OpenText("D:\sample.txt")
EntireFile = Read.ReadToEnd()

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9

Harsha Vardhan - 01/12/05

sir i want full code in a sequential wise how to read n write a text file in vb.net as a beginner of vb.net

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10

Barbara JoAn Varner - 30/01/06

your informatin is very informative as far as it goes. i have many more issues to solve
Attaching sublists to selected nodes of the main list. there are two text files each with data for the same players, 15 of them one is current data the other is history scores for from 3 to 10 years. I need to read both files and combine the data for each player and write it to a file sorted by year.
Building an ordered list (each sublist will be an ordered list)
Sorting a linked list (the main list will be sorted)
Building a doublely-linked list
Functionality to interactively add payer nodes
Functionality to edit and delete player data
Searching a linked list
Opening an external file for output and writing to the file
any ideas?

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11

Rose Anne Coulter - 04/02/06

Excellent web site. Simple and easy to use. A bookmark I will keep.

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12

praneth raj - 18/04/06

If i store data in text files in 3 different columns and i want to retreive data form a particular column. How is it possible to traverse along one particular column until it ends
Please reply i am in nedd of that

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13

Bob man - 12/06/06

I to would like some info on how to get info from 3 columns. please email thanks

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14

Brice - 12/07/06

great tut boys

<input type="text" />

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15

vijay - 14/07/06

Dear Sir,
i want to read a text file line by line and at the same moment
i want each line to be written in new file,i.e i want to copy file line by line and want to give the new file name as older one
please help me

regards
vijay

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16

Chaitra - 18/07/06

Hello,

Thank you very much for this code... It really works great.
However, I want to read only last line of the .txt file.

Is that possible???

REgards
Chaitra

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17

sangeeta - 19/07/06

How do you search for files and folders mathing the string input by a given user in the textbox in vb .net?

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18

Cory Sharshel - 28/07/06

Does anyone know if it is possible to read a file line by line starting at the end of the file and working towards the start of the file?

Regards

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19

Mohan Kumar - 03/08/06

I Want to print a text file using with VB.Net (for Dot Matrix Printing)
and
How to set a right alignment in a text file?

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20

Baseer - 03/08/06

i would like to Read a text file line by line and at the same moment write to it line by line? is it possible to do it without creating temp text files.. ?

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21

Muktesh Shrivastav - 11/08/06

hi,
I want read a text file and search for a particular pattern appearing in it. using vb.net.
if it is possible please provide some code also for it

regards
muktesh

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22

sanjay - 18/08/06

i want to change the font of text that i passed in writeline method ..
please do help

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23

Balakrishnan - 26/08/06

Hi tis very nice..
i want 2 know if the file is existing means i want to append the file..
how can do tis..

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24

Puneet - 29/08/06

its helpful
plz explain my code also
bw.Write(CStr(j))
what this line represents

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

        Dim fstream As New filestream("c:\mylog.txt", filemode.openorcreate, fileaccess.readwrite)

        Dim bw As BinaryWriter = New BinaryWriter(fstream)

        Dim br As BinaryReader = New BinaryReader(fstream)

        Dim j As Integer

        For j = 1 To 5

            bw.Write(CStr(j))

        Next

        br.BaseStream.Seek(0, SeekOrigin.Begin)

        textbox1.text = br.ReadChars(10

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25

dks - 29/08/06

to run a bat file using vb.net

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26

oms - 14/09/06

how to copy inputs from GUI calculator to exe file of bc commands...means how to copy integer calculations to bc.exe command prompt to calculate with the bc commands...
first things is to open the exe file and then auto copy that integers to the exe file and auto calculate..

I have writed some code to link the exe file..

but don't know how to copy that integers into the exe file...

and also don't know how to auto display characters in the sub directory folder...

I must display like...

eg..c:\bc_code>.\echo 4+3 |bc

7 <- is auto display

then copy that display 7 into the GUI again...

so, could anybody help my problem please...???



  Dim startInfo As New ProcessStartInfo("C:\Windows\system32\cmd.exe")

       startInfo.WorkingDirectory = "c:\bc_code"

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27

aruna - 21/09/06

hello sir
can u plz suggest me how to open a form in a text file

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28

Kamlesh Gujarathi - 27/09/06

Easy way is to read the file is only in VB.NET is -

objFile = objFile.OpenText(“C:\MyFile.txt”)
While objFile.Peek <> -1
objFile.Read()
End While

Thanks

Kamlesh Gujarathi (TL)
ITShastra INDIA Pvt Ltd.
kamleshvgujarathi@yahoo.com

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29

Joe - 27/09/06

this is the best way that I have found to read and write to a file...

Imports System.IO

'NameSpace required to be imported to work with files

Public Class Form1

    Inherits System.Windows.Forms.Form



    Private Sub Read_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Read.Click

        Dim fs As New FileStream("sample.txt", FileMode.Open, FileAccess.Read)

 'declaring a FileStream to open the file named file.doc with access mode of reading



        TextBox1.Text = ""

                       Dim d As New StreamReader(fs)

        'creating a new StreamReader and passing the filestream object fs as argument

        d.BaseStream.Seek(0, SeekOrigin.Begin)

        'Seek method is used to move the cursor to different positions in a file, in this code, to 

        'the beginning

        While d.Peek() > -1

            'peek method of StreamReader object tells how much more data is left in the file

            TextBox1.Text &= d.ReadLine()

            'displaying text from doc file in the RichTextBox

        End While

        d.Close()



    End Sub



    Private Sub write_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles write.Click

        Dim fs As New FileStream("sample.txt", FileMode.Open, FileAccess.Write)

        'declaring a FileStream and open a document file named file with 

        'access mode of writing

        Dim s As New StreamWriter(fs)

        'creating a new StreamWriter and passing the filestream object fs as argument

        s.WriteLine("This is an example of using file handling concepts in VB .NET.")

        s.WriteLine("This concept is interesting.")

        'writing text to the newly created file

        s.Close()

        'closing the file

    End Sub

End Class

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30

Joe - 27/09/06

this is the best way that I have found to read and write to a file...

Imports System.IO

'NameSpace required to be imported to work with files

Public Class Form1

    Inherits System.Windows.Forms.Form



    Private Sub Read_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Read.Click

        Dim fs As New FileStream("sample.txt", FileMode.Open, FileAccess.Read)

 'declaring a FileStream to open the file named file.doc with access mode of reading



        TextBox1.Text = ""

                       Dim d As New StreamReader(fs)

        'creating a new StreamReader and passing the filestream object fs as argument

        d.BaseStream.Seek(0, SeekOrigin.Begin)

        'Seek method is used to move the cursor to different positions in a file, in this code, to 

        'the beginning

        While d.Peek() > -1

            'peek method of StreamReader object tells how much more data is left in the file

            TextBox1.Text &= d.ReadLine()

            'displaying text from doc file in the RichTextBox

        End While

        d.Close()



    End Sub



    Private Sub write_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles write.Click

        Dim fs As New FileStream("sample.txt", FileMode.Open, FileAccess.Write)

        'declaring a FileStream and open a document file named file with 

        'access mode of writing

        Dim s As New StreamWriter(fs)

        'creating a new StreamWriter and passing the filestream object fs as argument

        s.WriteLine("This is an example of using file handling concepts in VB .NET.")

        s.WriteLine("This concept is interesting.")

        'writing text to the newly created file

        s.Close()

        'closing the file

    End Sub

End Class

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31

priyantha - 17/10/06

does anyone know about designing the link list to store text masages which from text file of through users (using vb.net)

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32

Kaleem - 30/10/06

Friends,

I am developing software for Smart Device using VB.NET, I have a text file of 45 MB. When I search record it takes long time as I am using loop. I want to know how to create index to a text file and seek using Index which will give fast search.

Thanks in Advance.

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33

Kaleem - 30/10/06

Friends,

I am developing software for Smart Device using VB.NET, I have a text file of 45 MB. When I search record it takes long time as I am using loop. I want to know how to create index to a text file and seek using Index which will give fast search.

Thanks in Advance.

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34

Pankaj Sisodiya - 31/10/06

Thanks

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35

JNorte - 05/11/06

To read last line i use this, and it work's for me.



  Public Shared Function ReadLastLine(ByVal path As String) As String

    Dim retval As String = ""

    Dim fs As FileStream = New FileStream(path, FileMode.Open)



    Dim pos As Long = fs.Length - 2

    While pos > 0



      fs.Seek(pos, SeekOrigin.Begin)

      Dim ts As StreamReader = New StreamReader(fs)



      retval = ts.ReadToEnd

      Dim eol As Integer = retval.IndexOf("" & Microsoft.VisualBasic.Chr(10) & "")

      If eol >= 0 Then

        fs.Close()

        Return retval.Substring(eol + 1)

      End If

      System.Threading.Interlocked.Decrement(pos)

    End While

    fs.Close()

    Return retval

  End Function

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36

zoma - 07/11/06

pls sir,

can anyone give me a sample login code using usrename and password that willl be able to access files instead of database,add new users to the text file and for new users to be able to sign in, generally reading and writing to a text file but using forms instead of a console application.

regards

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37

krishna - 09/11/06

how to read a .upd file and display it in textbox using vb.net.if file is random access mode

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38

Sandeep - 12/11/06

Thanks a lot

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39

priyantha - 13/11/06

i want to know about create link list and how it will defrag and graphically represent the defragment process using grid.

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40

Manoj Kumar - 15/11/06

any one help me to store every line of the text file into an array and to display it on RichTetBox control and any ideas on arranging the contents in alphabetical order.

Thanks in Advance.

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41

kumar nitya nand - 22/11/06

This code may helps you all to read and write the file

Imports System.IO





Public Function GetFileContents(ByVal FullPath As String, _

       Optional ByRef ErrInfo As String = "") As String



        Dim strContents As String

        Dim objReader As StreamReader

        Try



            objReader = New StreamReader(FullPath)

            strContents = objReader.ReadToEnd()

            objReader.Close()

            Return strContents

        Catch Ex As Exception

            ErrInfo = Ex.Message

        End Try

    End Function



    Public Function SaveTextToFile(ByVal strData As String, _

     ByVal FullPath As String, _

       Optional ByVal ErrInfo As String = "") As Boolean



        Dim Contents As String

        Dim bAns As Boolean = False

        Dim objReader As StreamWriter

        Try



       

            objReader = New StreamWriter(FullPath)

            objReader.Write(strData)

            objReader.Close()

            bAns = True

        Catch Ex As Exception

            ErrInfo = Ex.Message



        End Try

        Return bAns

    End Function

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42

Balakrishnan - 11/12/06

I want to search the particulare string in text file and change the string to another string.

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43

Somasundaram - 10/01/07

How to get the .Doc file's contents Using VB.net...

I want to get the .txt and .Doc files. but here i wrote the code only for displaying the txt file's contents.But it wont display the .Doc files.

I select the Doc and txt fileNames in Listbox.but File's Contents has to display in Richtextbox.

so I've written the code for(.txt) files only.But i need (.Doc) file's contents also.So How to get the (.Doc files Contents).So pls some one Help me......

Private Sub ListBox3_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ListBox3.SelectedIndexChanged



Dim myFile As System.IO.FileInfo

Dim fileInfo As String

Dim myFileName As String

Dim stream As StreamReader

Dim input As String



myFileName = ListBox3.SelectedItem.ToString

myFile = New System.IO.FileInfo(fileName:=myFileName) 

fileInfo = myFileName.Length.ToString 

stream = File.OpenText(myFileName)

input = stream.ReadLine()

Console.WriteLine(input)

RichTextBox1.Text = input

stream.Close()

End Sub

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44

somasundaram - 10/01/07

How to get the .Doc file's contents Using VB.net...

I want to get the .txt and .Doc files. but here i wrote the code only for displaying the txt file's contents.But it wont display the .Doc files.

I select the Doc and txt fileNames in Listbox.but File's Contents has to display in Richtextbox.

so I've written the code for(.txt) files only.But i need (.Doc) file's contents also.So How to get the (.Doc files Contents).So pls some one Help me......

Dim myFile As System.IO.FileInfo

Dim fileInfo As String

Dim myFileName As String

Dim stream As StreamReader

Dim input As String



myFileName = ListBox3.SelectedItem.ToString

myFile = New System.IO.FileInfo(fileName:=myFileName) 

fileInfo = myFileName.Length.ToString 

stream = File.OpenText(myFileName)

input = stream.ReadLine()

Console.WriteLine(input)

RichTextBox1.Text = input

stream.Close()

End Sub

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45

Teddy - 26/01/07

Can some one help how to access recent documents in vb.net
I have menu- with open, save , I want to see recent saved documents

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46

manisha - 01/03/07

sir,

i wanted to store selected items of listbox in the file.
how to write(store) it in file i am not geting? Please guide me.


Thanks,
Manisha

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47

Manisha - 02/03/07

please guide me for how to write data in a file.



Thanks,
Manisha

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48

Sanjay - 05/03/07

Please Can anyone help regarding file handling querry is
how can i change font size while writing into word document with writeline method ....
Please help

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49

Kishor A. Jagtap - 06/03/07

I want to Genrate a text File From the form

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50

Jan Laureys - 14/03/07

Thanks for the info :)

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51

dk - 30/03/07

Hello Sir

I am new in vb.net and i am working on reading and writing files project i have done how to write text in file and now i also want to display file text in message box or in different form like i stored name and age in one line and second line is name2 and age2 and so on ..and i put one combo box so it's displays all the name which already saved in test.txt file
now what i want to do here if user choose one name from combo box so i want to display only that name and age not anyother name and age in that test.txt file i mean if user choose name5 from combo box so i want to display name5 and age5 in message box or in text box

any help

wating for your kind rep.

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52

Himanshu Anand - 02/04/07

i want to access a file(web.config) but i want to access some perticular values from that file, not the whole file.
So how can i serach for a keyword in whole file.
Apart from this i have to show these key word in a data grid.
Can anyone help me in doing this.

Any type of help will be highly appriciated.

Thanks in advance.
Himanshu.

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53

Neeraj Kumar - 05/04/07

Hi
I wants to change the font size in text report.
But not able to do so.
Plz help me.

Thanks

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54

aisya - 12/04/07

Could you please to tell me how to save data sql server to the text files....if you dont mind ...give samples code to import data from sql server and saves it at text files.... please...these my code
Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click
phoneStreamWriter.WriteLine(txtName.Text)
phoneStreamWriter.WriteLine(txtPhone.Text)
With txtName
.Clear()
.Focus()
End With
txtPhone.Clear()
End Sub

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55

Sunitha - 17/04/07

Thnak a lot for this infomation.

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56

Sunitha - 20/04/07

Some code to hep you for writing into a file.

Imports System.IO

'NameSpace required to be imported to work with files

Public Class Form1 Inherits System.Windows.Forms.Form

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e_

As System.EventArgs) Handles MyBase.Load

Dim fs as New FileStream("file.doc", FileMode.Create, FileAccess.Write)

'declaring a FileStream and creating a word document file named file with 

'access mode of writing

Dim s as new StreamWriter(fs)

'creating a new StreamWriter and passing the filestream object fs as argument

s.BaseStream.Seek(0,SeekOrigin.End)

'the seek method is used to move the cursor to next position to avoid text to be

'overwritten

s.WriteLine("This is an example of using file handling concepts in VB .NET.")

s.WriteLine("This concept is interesting.")

'writing text to the newly created file

s.Close()

'closing the file

End Sub

End Class

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57

Mark Jones - 23/04/07

Excellent, just what I was looking for

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58

Ravfee - 23/04/07

thank for infomation

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59

Raheem MA - 01/06/07

Great explanation about files concept for beginers of VB.Net. It helps me alot.

thanks for ur help.

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60

Raheem MA - 01/06/07

Great Explanation, It helps alot for Beginers of VB.Net like me.


thanks ...

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61

Vijay - 08/06/07

Thanks for the good stuff.!!

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62

Satish - 08/06/07

good information

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63

Ravikiran - 18/06/07

hi,

i wanted to know how to write in a text.txt file in a particular position i want fix the containt in a particular position as i want

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64

Surbhi - 20/06/07

I need a code in VB which will read the .txt file and replace no. of spaces with one comma and then this file will be opened in excelsheet where at encounter of each comma the column will change.

Pls help me....!!!!

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65

Ayaz Khan - 25/06/07

I need to read data from a text file and insert them into a table with the column provided in the text file. Please help me with this. Ayaz

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66

Raj - 17/07/07

Thanks for the info :)..Its very use full

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67

prabhat - 21/08/07

How to convert the readonly mode of a file to append mode??


is it possible??
plz help me.

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68

prabhat - 21/08/07

How to convert the readonly mode of a file to append mode??


is it possible??
plz help me.

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69

Shehan - 24/08/07

Thank you! This helped me a lot!

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70

Shehan - 24/08/07

Thank you! This helped me a lot!

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71

sikhan - 30/08/07

I am new in VB.Net codding, i have a project to read the particular folder in that folder have files to search n which will open in txt file in list box or txt box and search some data i.e. filename etc which will show in grid
( which is came through novel server)

so please help me regarding this and if you have infromation about please forward to my email address sikhan555@yahoo.com.

thanks in advance

regards

sikhan

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72

sikhan - 30/08/07

I am new in VB.Net codding, i have a project to read the particular folder in that folder have files to search n which will open in txt file in list box or txt box and search some data i.e. filename etc which will show in grid
( which is came through novel server)

so please help me regarding this and if you have infromation about please forward to my email address sikhan555@yahoo.com.

thanks in advance

regards

sikhan

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73

sonal - 08/10/07

Really very Useful

hi

how to store all (text files,images,document,mdb,xml)in sql server 2005 database in vb.net?

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74

Chloe - 09/11/07

Hi all,

i am working on a project that read the database file from Access in VB.NET. Then I have to chop a original data from the column and fill the splitted data into new column.
For example, the data in the particular column is
ABC 1 2 1

So i have to split the numbers by ignoring the characters and assign it into new column. It's huge data.
Anyone could help?
Thanks in advance.

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75

Jaya - 26/11/07

As I am a fresher in vb.net, i want to know how text reports can be created in this. And how values can be taken from the database?

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76

Johnny - 05/12/07

Hey All I'm a begginer at vb.net all i wan't to know is how would I store some information from a simple combo box in a textfile or put the contents of the combobox into a .txt file if anybody can help
thanks

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77

asrol - 17/01/08

How to delete specific data in text file ? Any body help me.

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78

Nilesh(TigerN*) - 19/02/08

first i have Thanking you.
for help me in spliting.

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79

tushar - 05/03/08

can we do this file creatino and writing in C# .NET

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80

sharath - 12/03/08

can we use loops in writting a Line

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81

jubertroldan - 26/03/08

i need help in replacing a specified line (with index) in a text file. please help. jubertroldan@yahoo.com thankyou

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82

jerrychu - 30/03/08

Say, i got a txt file, the value inside is copy from excel. like
1 2
1 3
1 5
I got 100k lines record, I want to do some calculations, so I want to define a(i) for first colonum and b(i) for second column. so how should I do it? Thanks

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83

John Madison - 02/04/08

Imports System
Imports System.IO

Dim oFile as System.IO.File
Dim oWrite as System.IO.StreamWriter
oWrite = oFile.CreateText(“C:\sample.txtâ€)
OpenText

The "oWrite = oFile.CreateText..." line gives me the error:
"Access of shared member, constant member, enum member or nested type through an instance; qualifying expression will not be evaluated."

What am I doing wrong? I can never get VB.NET examples to work. Even the simple ones. It always seems that some vital peice of information gets left out.

Though at least this example mentioned the IMPORTS statement. Sometimes examples leave out what to import. Which makes it very confusing for someone who only programs in their spare time.

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84

chandru - 02/04/08

how to read a particular line in the text file.
if anybody knows help me.

thanks,
chandru

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85

pcpchandru - 02/04/08

how to read a particular line in the text file using vb.net 2005
if anybody knows help me.

thanks,
chandru

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86

pcpchandru - 02/04/08

you have to create a file using filestream then onlt u will write a string on the particular file name. 

Dim FStream1 As IO.FileStream = New IO.FileStream("C:\testfile.txt", IO.FileMode.Append, IO.FileAccess.Write)

        Dim SWriter1 As IO.StreamWriter = New IO.StreamWriter(FStream1)

SWriter1.Write("**********")

  SWriter1.Close()

   FStream1.Close()





use the above code .

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87

James - 10/04/08

How do I read a text file and have it display line by line in VB.Net or show only certain lines like only show line 3 or 4

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88

syam - 11/05/08

can you specify
best way to operate on files
both binary and text file
which are the main class to use

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89

aseem - 12/05/08

i am trying to do doing programs in pocket pc device windows ce os how i can make tab controls and data reading possible in this device

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90

sruthi.c - 14/05/08

how to read and dispaly any type of file say .doc,pdf,excelspreadsheet in a textbox in c# windowsforms

i am able to read and dispaly only text files not not the other file.
Please help.

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91

stephen - 05/06/08

How can i read from text file one line at a time? I'm implementing a next and previous button which will only retrieve a single line everytime a button is pressed.. thank you..

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92

stephen - 05/06/08

How can i read from text file one line at a time? I'm implementing a next and previous button which will only retrieve a single line everytime a button is pressed.. thank you..

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93

Rajendra prasad - 09/07/08

How to search a file or folder when i give a input in textbox control that should be search Entire Drive and display the Actual path where it is located I am doing this Application in C#.net windows applicaion plz help me

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94

wahid ali - 10/09/08

your code is not help me.


i want there is .txt file in my system.open the .txt it having white spaces.i want some text in a column till last row and comes into database.

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95

aneroph - 15/09/08

None of these methods are working for me. i have been looking all over to figure out how to read and write in VB 2008 but i cant find a single tutorial that works. I am making a game and i want to be able to save high scores and names to a file and then when someone plays through i need to open up that file and compare their score with the other numbers saved and possibly insert it. i can do the "if" statements and what not but i cant find anything that works even to just save some text let alone ten different texts with names. someone please help

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96

Rosh - 24/09/08

Hey,
None of the Codes are working for me.
Im new to VB.Net working on Win App.s.(VS-2005) Im tryuing to read a text file and display the contents in the text items of the App. form.

Can any one plz help.

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97

Nader Hussain - 03/10/08

How do I define oFile? The object must be assigned a value. This is for a *.txt file.

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98

Rozie - 08/10/08

How can i convert from vnet to text file..
please help...

thans..

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99

vishals - 02/11/08

Hi I need help. I am having difficulty in reading and writing data from datagrid in vb.net from text files.
I have to first write the data entered to the text files.
and secondly to call same on the datagrid.

Thanks to advise the code.

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100

Mironi - 14/11/08

Thanks for taking your time to help me and others.
These comments and codes helped me.

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101

1 - 15/11/08

3

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102

kunal - 12/01/09

how can i clear the contents of a file before writing to it...i see that i open the file using file.Open , but the text is appended at the beginning rather than overwriting it...

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103

Jason Giandalia - 20/01/09

I am new to VB. Currently using VB 2008 Edition. Trying to read from a text file. That is not a problem but I am trying group by a certain name. Here is the text file I am trying to play with:

George
Gold
Sally
Silver
Bob
Bronze
Bruce
Bronze
Steve
Silver
Gwen
Gold
Superman
Silver
Joe
Silver
Bill
Bronze
Geraldine
Gold
Mike
Bronze

Basically I need to show in the following order: "Bronze" then "Silver" then "Gold"

I know this is probably a basic function but I have not been able to find anything.

If you have any advice, please let me know.

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104

mehul akoliya (patel) - 28/01/09

please more example send my e-mail id ...............


i thank full for you bay

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105

trijoed - 30/01/09

thanks a lot. Its helpfull for me. But, would u make your article shortly?

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106

anusha - 11/02/09

your explanation is very clear. Thank u so much. It is very helpful to me to learn file operations in vb.net

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107

mitra - 06/03/09

pls write the hint of code.

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108

Alex_W - 10/03/09

I need to read a text file, find a line that contains "ComputerName=" then write this line to a string variable I can set to a label on my form. Does anyone have code for this?? Closest thing I have (which doesnt work) is coded: 

' Open file.txt with the Using statement.

        Using r As System.IO.StreamReader = New System.IO.StreamReader("file.ini")

            ' Store contents in this String.

            Dim line As String

            ' Read first line.

            line = r.ReadLine

            ' Loop over each line in file, While list is Not Nothing.

            Do While (line.Contains("ComputerName="))

                ' Add this line to list.

                line.ToString(ComputerName)

                ' Read in the next line.

                line = r.ReadLine

            Loop

        End Using

        lblComputerName.Text = ComputerName

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109

kag-man - 13/05/09

please help how to read and write to a rext file using vb2005 " Windows Application "

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110

Jack Bhanded - 19/05/09

Thank you Nityananda for great piece of code!

Regards,
Jack

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111

Hussein - 26/05/09

Very helpful. Thank you so much!

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112

susan - 03/06/09

can u send me the code how to read n write from textfiles using VB.net....
n from vb.net to access databases

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113

dddd - 15/06/09

sfsdasdsd 

sdasfaddf

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114

Paresh - 18/06/09

Very useful. Thanks for sharing this information.

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Latest comments

114

Paresh - 18/06/09

Very useful. Thanks for sharing this information. ... more

113

dddd - 15/06/09

sfsdasdsd sdasfaddf ... more

112

susan - 06/03/09

can u send me the code how to read n write from textfiles using VB.net.... n from vb.net to access databases ... more

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