Split A Text File So That Each Line Does Not Exceed 50 Characters?
May 23, 2012
I am reading a text file with mostly alpha characters. the content is not really relevant but the size of each line is very important. The process I will feed this text to will require each line be no more than 50 characters. So I will pre-process the text and add line feeds to make sure that happens.I tried several VB.NET regex like ^.*$ but that doesn't really break up the lines by 50 characters. I would take the result and iterate through each match and then cut it up and write it to an object in memory. Can this be done with a single regex pass?Otherwise I will use a streamreader and on each line check the length and if <=50 write it out with a streamwriter. if >50 cut it up in sections of 50 and then use streamwriter.
A brief example of my text:
119 SMITH KATY AAAA F ZZZ X NB SX ET
MILES,200/LM450
[code]....
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Jul 27, 2009
I have a lines in my text file like this
[Code].....
It not spliting the line and writing but it write everything to text file
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Aug 9, 2009
9.0 28 Black (2 13.00 26.0) (2 01.00 26.0) 97611 2275 97611 -81725
9.0 28 Black (2 01.00 49.0) [2 11.00 18.0] 63111 -81725 109611 -11725
2.0 28 Blue (2 14.00 64.0) [T1 ] 40611 9275 81504 -49757
[code].....
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Aug 10, 2009
i have line like this
9.0 28 Black (2 13.00 26.0) (2 01.00 26.0) 97611 2275 97611 -81725
9.0 28 Black (2 01.00 49.0) [2 11.00 18.0] 63111 -81725 109611 -11725
2.0 28 Blue (2 14.00 64.0) [T1 ] 40611 9275 81504 -49757
[code].....
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Feb 20, 2012
Why can I only see the first line split in the listboxes repeated 4 times? I can not see all the lines of the Dictionary.[code]...
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Aug 4, 2009
I know that the topic is kind of weird, but I will explain that here. I am reading text from a text box and inserting that into a listbox. I am wanting to read what the user inputs into the text box and add a character between each character they type. Here is what im wanting to do written out[code]...
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Jun 19, 2010
I have listbox which is populated from a text file with all the items fromt he 1st split, the text file looks like this:
Quote:
test l1c1 | test l1c2 | test l1c3
test l2c1 | test l2c2 | test l2c3
[code].....
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Nov 26, 2009
I have a problem I was hoping someone might be able to help with please. I am trying to read and interpret a .txt filewhich typically has a data line of the form:I want to be able to split each value, i.e. so I have:
DESCRIPTIONNAME
104.19
6171
[code].....
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Apr 11, 2011
I have a listbox where each line contains a short 3-4 character model number followed by a tab and then the product name the model number corresponds to. I also have a textbox which I am using to search the listbox.
The code I am using so far works somewhat, just not exactly how I would like. If I enter search text it will highlight the results in the listbox but only for the first characters, is there anyway to search the text of an entire line (index) of a listbox?
Right now I am using the following:
Private Sub txtSearch_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles txtSearch.TextChanged
ListBox.SelectedIndex = ListBox.FindString(txtSearch.Text)
End Sub
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Dec 19, 2008
I've been looking through the FCL for a method that will allow me to erase a line of text from a text file and replace it with another line of text. Neither the StreamReader nor StreamWriter have a method for replacing or removing Text from a text file, as does the string object. Are there any available methods for erasing just certain lines of text from a file, and then replacing them with others?
In my code, I'd like to locate a certain line in the text file, and then at that point in the text file, use a For...Next Loop to replace each successive line of the text file with new text:
Dim user_data_file As String = "user_data.txt"
edit_input = New StreamReader(user_data_file)
Dim edit_line As String = edit_input.ReadLine
[CODE]...
However, I can't find any methods that will allow me to do this.
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Sep 21, 2009
Basically what I'm trying to do is read a text file line by line. After each line is read, it will put each line into a separate text box. I've been trying to do this for a while and so far I haven't been able to. I tried using a for loop, but that just put all my lines in to one textbox.
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Jun 23, 2011
I'm reading a text file with StreamReader, line by line. If a condition is met, then I do an operation and then start reading the file again from the first line. I realize I could close and then re-open the file, but surely this would be very slow.
I could do this easily in VB6, but pulling my hair out trying to do this in vB.net. It seems that 'Seek' is the function to use, but it doesn't work.
I've seen other examples, where it works, but you must open it a different way -- with a file number.
Imports System.IO
Dim I as Integer
Dim LineText as String
[Code].....
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Jun 25, 2010
I'm trying to read a text file that contains info like this:
ACX-101-011 , J2168
BTXR-130A-013, D6733
AJ4-233-614, T8211
I want to split each line at the comma and write the left side to a textbox and the the right side to another textbox. I'm close, with the code below, but I can only post results from the first line in the file. How do I loop this and append the text results in each of the textboxes.
Dim TempFile As String
TempFile = "temp.txt"
Dim sw As StreamWriter
[Code].....
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Jan 27, 2012
what would be the optimum code in VB2010 that check a file to determine:
1) is it a text file, and
2) if it is a text file, does it contain any non-ASCII characters
Note that LF, CR, and EOF would be expected, and should not be flagged. I can think of 3 - 4 ways to do it, but there may be a 'best' way in terms of simplicity and speed.
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Apr 7, 2009
I have read the contents of a text file that looks like the following lines into vb;
this_date = "1-2-09"
// user input
//user input
this_date = "2-22-2009"
[code]....
(there is no limit to how many "this_date" lines or "//user input lines" there are in the file and additions are made often ) When I read the file in vb I wish to only capture the last "this_date" only as the rest are irrelevant.
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Jun 29, 2009
i would like to store contents from a text file line by line to arrays before copying them to another text file. what i have is currently like this:
[Code]...
Currently I'm only able to store the whole content into one variable, would like to store the content line by line in arrays.
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Oct 16, 2010
Example:
MY NAME IS STACKOVERFLOW
Results in:
MY(new line)
NAME(new line)
IS(new line)
STACKOVERFLOW(new line)
[Code]....
I want to split the line into multiple lines using either a space or dash or whatever it is.
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May 18, 2010
Is it possible to replace string characters using the delimiter and limit of a split function?
For example you have this string "1,1,1,1,1"
I wish to replace sentence number 2 into the string "2" between the "," character so that will be limit number 1.
So the result would be "1,2,1,1,1".
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Jan 8, 2012
I have a program where a user enters a list of numbers in the form of a string. This list of numbers is always a multiple of 8.So the list can contain 8, 16, 32, 40, 48, etc. numbers.
I need to split that string into every 8 characters.For example, say the user entered "1234123445674567"
How can I split it into a string array where (0) is "12341234" and (1) is "45674567"
Note: The size of the array has to be equal to the length of the string divided by 8.
Like this:
Dim stringArray(txtInput.Text.Length/8) as String Edit: I know I could do this by making a loop that counts 8 numbers and splits it into an array but that would be lengthy and take a few variables and I know there's a more efficient way to do it. I just don't know the syntax.
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May 14, 2009
I have to create a new program that reads to Text files. These text files are in the form of a report (with column headings). The purpose is to compare each record line by line to see if their have been any changes made. The record is based on an Account#. Over time these files will be considerably large. What is the best way to do compare records from each file. I'm thinking loading each file into an array and processing them that way.
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Sep 11, 2011
Basically, I'm creating an application which takes a list of words in .txt format, such like this:
Abc
Def
Ghi
Jkl
mno
What I want to be able to do is modify the words, one by one, so that I end with
Abc1
Def1
Ghi1
Jkl1
mno1
or whatever the user wants.
I created this app in C++ to get the logic, since I am more confident with that
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Mar 19, 2012
I must use streamreader to read text file line by line into array.
Here's what I've got.
Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
Dim numbers() As Double = New StreamReader(txtfile.Text)
Dim numbersarray() As Double
[Code].....
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Apr 8, 2010
I just joined this forum as I've been looking for a nice and serious VB forum for a long time
I'm having troubles making a program to search a text file line by line for a specific string.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim objReader As New System.IO.StreamReader("C: est.txt")
[Code]...
as you can see in the code its supposed to read a text file and if the line contains the same string as in the textbox then its gonna make a messagebox.
now the problem, if the line does not contain the specific string but the next or any line other line does, then it should automatically read the next line on "Else" and that's where I'm lost
for a "Readnextline" command or something like that?
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Sep 26, 2009
I have a list of random numbers in my text file.I read it like this.
Dim FILE_NAME As String = "C: est.txt"
Dim TextLine As String
If System.IO.File.Exists(FILE_NAME) = True Then
[code]....
How can I separate that in to 2 listbox?In my ListBox1 I want add lines with starting number like this ( 0905, 0906, 0915, 0916, 0917, 0926, 0927 ) And in my ListBox2 is with numbers start with this ( 0909, 0910, 0912, 0918, 0919, 0920, 0921, 0928, 0929 )How can I compare lines by multiple choices like that?
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Sep 19, 2010
Ok, I saw this code on the net
Dim sFileName As String
Dim srFileReader As System.IO.StreamReader
Dim sInputLine As String
sFileName = "D:UsersArbenDesktopSerieA.txt"
srFileReader = System.IO.File.OpenText(sFileName)
[Code]...
under the code I pasted at the top, but I get the text on line1 in all labels, like all labels become 1, while the text should be 1, 2, 3 and so on. So anyone can help me do that, each label gets the value of the next line in the txt file
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Feb 13, 2012
the following code was to be entered to read each line of the file "line by line" It did not work for me as instructed and I am trying to understand why?
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim FILE_NAME As String = "C:UsersOwnerDocuments est.txt"
Dim objReader As New System.IO.StreamReader(FILE_NAME)
Dim TextLine As String
[code]....
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Aug 4, 2010
I have a text file which has the format
A;UK;WN0XKKF;XX377SL;POSS TRADE MONITOR
A;UK;N6HXS;XX361NG;POSS TRADE MONITOR
A;UK;DU58XPK;XX37 6UR;EXCESSIVE WASTE MONITOR
A;UK;R251YXF;XX36 ZHA;POSS TRADE MONITOR
I am trying to read the code, and pull out the 3rd, 4th and 5th set of each line in to a datagrid.
Dim list = New List(Of datagrid)
Dim FILE_NAME As String = "C: est.txt"
If System.IO.File.Exists(FILE_NAME) = True Then
Dim objReader As New System.IO.StreamReader(FILE_NAME)
Do While objReader.Peek() <> -1
[Code] .....
I get the reg come up ok, but then it errors out with Index was outside the bounds of the array.
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Aug 11, 2009
my text file will look like this
7.0 28 Black [2 11.94 37.7] (2 13.00 14.0) 115611 2275 79996 -5121
7.0 28 Black (2 13.00 50.0) (2 04.00 39.0) 78111 -60725 61611 2275
7.0 28 Black (2 11.00 18.0) (2 02.00 19.0) 108111 -74725 109611 -11725
[Code].....
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Aug 10, 2009
my text file will look like this
7.0 28 Black [2 11.94 37.7] (2 13.00 14.0) 115611 2275 79996 -5121
7.0 28 Black (2 13.00 50.0) (2 04.00 39.0) 78111 -60725 61611 2275
7.0 28 Black (2 11.00 18.0) (2 02.00 19.0) 108111 -74725 109611 -11725
[code].....
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Apr 21, 2010
I have a text file which is about 700MB it is very difficult to open this file but there are 5800 Chapters in the file every chapter is starting from "$$NEW$$" For example [code]I want to split the text file after every chapter ends any idea ?
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