Delete Lines From A Csv Using Streamreader Or Streamwriter?

Aug 14, 2010

I am writing a click event to delete an item selected from a list view which will utlimately be deleted from the csv file the information is coming from.Currently I am having streamreader read each line and then replace the selected line with a blank line. This creates blank lines in my csv files. Is there a way to delete a line using sr or sw without creating blank lines?Or is there a way to have them read/write a file skipping any empty lines?

My
If ListView1.SelectedItems.Count = 0 Then
MessageBox.Show("Please select a class from the upcoming schedule list.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Exclamation)
Else

[code]....

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Using StreamWriter And StreamReader?

Jan 18, 2009

using the StreamReader / StreamWriter code. I want to store a new password in a .txt document that will later be printed. Here is the code I have so far. The code runs but I cannot find the .txt document.[code].....

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Communications :: Using Streamreader And Streamwriter?

Jul 16, 2008

I'm trying to use streamreader and streamwriter to get the data sent and received. For some reason the data isn't sending or receiving?

Server

Code:
Imports System.Net.Sockets
Imports System.Text
Imports System.Threading
Imports System.IO

[code]....

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VS 2010 StreamReader And StreamWriter?

Nov 10, 2010

I am using streamreader and streamwriter to read a text file , change the text, then write to the same text file. This all happens in a loop every second or so.Currently I use:

Dim csetpointfileread As New System.IO.StreamReader("C:webcsetpoint.txt")and Dim csetpointfile As New System.IO.StreamWriter("c:webcsetpoint.txt", False)before every file read / write operation, it gets dimensioned every loop. To me this seems like a waste, and should only have to be dimentioned once. If I try to run both statements in the beginning, outside of the loop, the second statement wont work because the "file is allready open". Am I missing something or am I doing it correctly to begin with?

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[2008] StreamReader To StreamWriter?

Jan 19, 2009

I have this code to send all line of a txt file to a listbox (StreamReader).

Dim sr As New IO.StreamReader("Items.txt")
Do Until sr.EndOfStream
lstItens.Items.Add(sr.ReadLine)

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Streamreader/streamwriter Won The Bottum Up - Sorted?

May 19, 2009

I have a text file like this, my streamwriter put the new line a the buttom:

19-05-2009 21:53:30 DESKTOP-XPPer Søgte på Crpnr 3
19-05-2009 21:53:36 DESKTOP-XPPer Søgte på Crpnr 3
19-05-2009 21:53:44 DESKTOP-XPPer Søgte på Crpnr 1
19-05-2009 21:54:36 DESKTOP-XPPer Søgte på Crpnr 1

[Code]...

i am a newbie and started in 2009 trying to learn some coding in Visual Basic.

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VS 2008 StreamWriter And StreamReader With TreeView

Dec 28, 2009

I'm creating a text file and, among other things, I need to write the text of the parent and child nodes of a TreeView to the file. I know how to write the contents and read them just fine, but what I can't seem to figure out is how to write the contents if I don't know how many parent nodes or child nodes there are. When I do, I usually do the following:

[Code]...

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.net - Read And Write Into A File Using Streamwriter And Streamreader?

Jun 2, 2011

I am trying to read the content from a .csv file and storing it in a variable. Later I am writing that content into a newfile. Code is executing successfully but the data is not appearing in new file. Here is my code:

[Code]...

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Cannot Read Special Characters With Streamreader / Streamwriter

Nov 23, 2009

To automate mailmerge function in word, i need to join different elements to complete the mailmergedatasource. In one of these file are words with special characters like ©, §,¨, .... When openng these files for reading, streamreader transfoms the characters to unreadable signs. When i give a type to use to open like ASCII, Unicode,it works for one or tho characters but not for all. I have the same problem when the character is read correctly, with streamwriter output to a textfile. Word cannot read the textfile and ask to define which type of coding should be used. In most of the cases not all the characters can be converted to readable characters.

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Publishing Vb Application With StreamReader/StreamWriter .txt Files

Mar 4, 2012

In my code I've allowed used to create their own mazes and save them, under whatever name they like. I've also included a few pre-created mazes. The mazes themselves are saves in .txt files in the bin/debug folder of the project, along with a .txt file containing the maze names.

I really need to publish this program to send it to my teacher, but when I publish it it doesn't include any of the .txt files in my bin/debug folder.

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Use Filestream And Streamwriter / Streamreader To Have A Simple Text Box?

Oct 21, 2009

I am trying to use filestream and streamwriter / streamreader to have a simple text box where the text entered is written to a text file, and then a button can be clicked to read the file and present the text back to the textbox. It works, but the problem I'm having is that if i change the text to something smaller in length (less text) than what is currently in the file, then press the button to read the file, it still contains some of the old text that was previously in the file.

Dim strmReadFile As New FileStream(txtPath.Text, FileMode.Open, FileAccess.Read, FileShare.Read)
Dim readHandle As New StreamReader(strmReadFile)
'read the entire text, and set it to a string
Dim streamFileContents As String = readHandle.ReadToEnd()

[code].....

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Streamreader Or Streamwriter - Ignore Line Depending On Contents

Apr 1, 2009

Not sure what to use or how to use it. But I would like either streamreader or streamwriter to ignore a line depending on it contents.

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VS 2008 Online VB Networking - System.IO.Streamwriter And Streamreader

Jan 14, 2010

I made my own advanced networking system which uses System.IO.Streamwriter and Streamreader but offline. I would like to let this use a directory online, I have a webhost available for that, now how do I say to the program it has to look at a specific map with all the users information?

I now have already this into my login form:

Private Sub btnLogin_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLogin.Click
On Error GoTo A

[CODE]...

Just curious if I can let my network grow out international instead of pc. Also I have a second question. I made a create account page which is supposted to make a text file with the txtUserName and txtPassword inputs, but it does create the file, but doesnt write any lines into it.

Code here:

Private Sub btnCreate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCreate.Click
Dim UserGenerator As System.IO.StreamWriter

[CODE]...

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StreamReader And StreamWriter - Invalid Character Result After Reading Zurich

Feb 13, 2012

I am having a problem writing a string like a word "Zürich" the output became "Z�rich"

I am using StreamReader and StreamWriter.

Code: below

Imports System
Imports System.IO
Imports System.Text
Module Module1

[CODE]...

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Series Of Lines To A Streamwriter In ASP.NET 3.5?

Jan 6, 2012

Trying to write a series of lines to a streamwriter in ASP.NET 3.5 VB.NET but I get an error 'Object reference not set to an instance of an object.' Here is the code

Dim sW As StreamWriter, iX As Integer = 0
For iX = 0 To 5
sW.WriteLine("SomeThing") 'Error occurs here
Next

My goal is to write a write a series of strings in different lines. This seems so simple but I don't see how the reference isn't set; I'm declaring two lines above.

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StreamReader - Reading From Lines?

Oct 13, 2010

I have the following code;

Public Sub writetofile()
' 1: Append playername
Using writer As StreamWriter = New StreamWriter("highscores.txt", True)
writer.WriteLine(PlayerName)

[code]......

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Determine Number Of Lines In StreamReader?

Jun 6, 2007

I am developing a VB.net 2005 console application and before reading each line I need to determine the number of lines in a streamreader.Is there a way to do this easily?


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Streamreader Reading Specific Lines?

May 17, 2010

when using stream reader to read text files how would i go about reading or referencing specific lines.so if i wanted to read from say line 2, 3, 4 or 10,11,12 in the textfile or what ever.

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Using StreamReader To Read Lines From Textbox?

Sep 20, 2010

I am using Visual Basic 2010 with Windows 7. My code is is follows:
Dim file as system.IO.StreamReader
file = My.Computer.FileSystem.OpenTextFileReader(C":financialsprogramcurrency.txt")
TextBox1.text=file.ReadLine()
file.Close
For some reason my program does not execute beyond the Dim statement and instead displays the form without text in TextBox1.

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Listbox And Streamreader - Select More Than One And Have The Whole Of The Lines Loaded?

Sep 24, 2009

Using Visual Studio 2008

I have a Listbox where i use OFD to list selected text filenames, can be multiple and from different drives

[code]...

I would like to be able to select more than one and have the whole of the lines loaded. I have tried many approaches, 'For each line' for example, but cant get my head around it. Another issue is that i would only like to see the textfile name in the listview box instead of path and filename.

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VS 2008 StreamReader Read Lines From Bottom To Top?

May 20, 2009

the default readline method of streamreader reads the text file from top to bottom how i can reverse it?from bottom to top?

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VS 2008 StreamReader Reading Certain Lines From Text File

Aug 15, 2010

I am in the process (slow process) if learning vb.net by trying to create a simple application that will read and write (save) chosen information to a text file. The application has text boxes (name, email address, etc) and I want to read information from certain lines in the text and place in the given text box.[code]When I start debugging mode it does not display the text until I click onto the text box and it's displaying the first line of text in the file. How do I skip the first line of text and have it display the second line (or the 6th, 24, or whatever line I need to be displayed)?Then I can start working on learning to use streamwriter

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.net - Using StreamReader To Read Lines Of User Names And Place In A Shell?

May 19, 2011

The following is what I have that is exporting all usernames to a text file.

[Code]...

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VS 2010 StreamReader Freezes Project After Reading A Few Lines Of STDout Of FMLEcmd.exe?

Oct 10, 2010

Im having trouble with streamreader.. It keeps locking up the debugger after the first 3 lines.. The last line being blank.. There is basically a status readout screen that updates every second or so with statistics about the Video Stream in the FMLEcmd.exe program

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ListBox & StreamWriter & StreamReader - Reads All Line Of The File And It Add An Item In ListBox For Line?

Aug 25, 2006

I have a "Form" with:

1- List Box

1- TextBox

3- Button

1- OpenFileDialog

1- SaveFileDialog

I want that clicking the btn1 it shows the OpenFileDialog and read file that it has got this structure: SKI10 1 71 0 0 18 101 19 0 29 101 30 0 40 101 41 0 50 101 51 0 62 101 63 0 81 101 82 0 95 101 2 0 0 95 165 3 0 1072 01 4 2 1 93 15

I want that it reads all Line of the File and it add an Item in ListBox for line.For example the first Item of the ListBox in this case is

SKI1

And the 2th Item is in this case.

0 1 7

I want using the StreamReader classes.And i want that when i click an Item of the ListBox it shows the Text in the TextBox and I can edit the Line and that clicking antoher button the Item will come updated with new Text of the TextBox.I have also another button for saving the Mod.I can use the AppendText and it create a new file writing ListBox1.Items line for line.

If SaveFileDialog1.ShowDialog = Windows.Forms.DialogResult.OK Then Dim file_esistenteD As StreamWriter[code].....

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Streamwriter And Strange Charactors - Opening The Streamwriter With Different Character Sets As The Third Parm?

Apr 21, 2010

I am taking in two html files and creating one out of them. To do this I am opening the first html file and not writing out the closing </body> and </html> tag and opening the second file and not writing out the corresponding opening tags, as well as the <style></style>section. I start a streamwriter, and write the lines out to it, and then close the streamwriter. My problem is that the output file is filled with strange characters. I've tried opening the streamwriter with different character sets as the third parm, but all this does is change the characters to different strange characters.It says charset=windows-1252 at the tops of the input files (and the output files for that matter - since I'm just reading stuff in and writing it out - with the exceptions mentioned above).Questions;First, do you think I am properly approaching appending two .htm files together?Second, how can I eliminate these strange characters.

[code]...

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Streamreader Limits - The Streamreader Works Fine Until The File Is More Than 100,000 Bytes Long?

Apr 19, 2011

I have a problem with a streamreader in visual basic 2008.I am updating a database from text files on an ftp server. The streamreader works fine until the file is more than 100,000 bytes long.It reads until it reaches this point and then just ends. No error message, it just reads to this point which happens to be 2 fields out of 6 in the database stream. My question is - does the streamreader have a limit? And if so what is a workaround?

Dim connString As String = "Data Source=" & pDataBase
conn = New SqlCeConnection(connString)
Dim strQuery As String = ""[code]......

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StreamReader/Writer - Loads An Entire Text File Into A Streamreader Variable

Jul 9, 2009

I'm writing a program that basically loads an entire text file into a streamreader variable, then reads this variable line by line and parses and writes a line into a new text file. I'm VERY new and my knowledge is mostly self-taught, but I can't seem to get out of this one. It works for smaller files, but it appears to reach a limit in characters at some point because in a file of 900 lines, it stops writing about halfway through 800 and there are no errors, the program actually completes and the message box pops up.

There are a few things with this code I already know I should fix, such as creating the new text file name, it's messy, I just don't know how.

Private Sub btnProcess_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnProcess.Click
Dim IndexValues As String()

[CODE]...

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Delete The Duplicate Lines?

Jul 30, 2009

i have lines like this in my text files.

2.0 28 Blue (2 14.00 63.0) [2 12.43 54.3] 42111 9275 55111 -1725
2.0 28 Blue (2 14.00 64.0) [2 13.50 55.3] 40611 9275 53611 5775
2.0 28 Blue (2 14.00 58.0) [2 12.21 54.3] 49611 9275 55111 -3225
5.5 28 Blue (2 20.00 17.0) [2 13.50 26.3] 111111 51275 97111 5775

[code]....

This are some of lines in my text file.they are duplicate lines in the tex file. I want to delete the duplicate lines because i only want the lines which have [T1],[T2....]... i higlight all the matching lines.

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Delete Lines That Don't Meet A Criteria?

Jan 19, 2011

I'm looking for a way to delete lines that don't meet a criteria in VB.net. I'll just give a example of what I want done below.

Basically, I want the program to go through a text document (Each line) and if the line doesn't contain a certain string it would get erased.

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