ListBox And Text File Manipulation?
Oct 10, 2010
The homework assignment goes like this: write a menu-driven program to manage an employee list. the names should appear in the listBox when the form is loaded. When a name in the listBox is highlighted the name and number txtBoxes are loaded with the correct name and employee number. Use the Update menu items--modify,add,delete to edit the listBox items.When the Exit menu item is clicked the new employee list should be written to the text file and the program should terminate.
Well, the first part was completed successfully, but when I tried to delete a name and number I recieved an error box that said "InvalidOperationException was unhandled", "sequence contains no elements" that pointed to line 35. msdn and help were no help, talked about dataset tables? Did I use the incorrect syntax? Once I resolve this issue, the other two--modify,add should be similar, but then how do I reconstruct the text file so that it will properly load the next time the form is loaded?
Public Class Problem_1_p451
Structure Company
Dim name As String
[code].....
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Dec 9, 2011
So far I have a button that calls scan.bat which simply runs net view and outputs to file.txt. I then want to strip out all the gumpf so it just leaves the names of the PC's in the list (not the remarks and all that).I'm new to all this, so it might not be the most elegant way of doing this!
Imports System.IO
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[code].....
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Feb 19, 2010
I don't actually know where to post this cuz i don't actually need code, i just need help on the logic. But if i could get a code then that's fine either
you see, i'm trying to get specific details on a text file.For example, the contents of the text file is like this:
[Code]...
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Jun 28, 2009
1.In my program I have 2 textboxes.In first textbox user need to put some number.Let's say he put number 10, then in other textbox program need to write numbers from 1 - 10, like this:
1,2,3,4,5,6,7,8,9,10
If he put 20 in first textbox, in second textbox it should be:
1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20
2.I need to do this...Import text file to listbox.Export items in listbox as text file.
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May 31, 2012
[Code]...
Then skips straight to the Else without performing the two lines in between, regardless of whether the item was checked or not checked. It doesn't crash, doesn't throw any errors, so I am assuming I coded this wrong somehow.
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Feb 12, 2012
I am starting to learn reading and writing to textfiles. One quick problem. My code here
'Read is the variable that will read the kp.txt file"
Dim read As IO.StreamReader
read = IO.File.OpenText("C:2/kp.txt"[code].....
however when it is read into the listbox those 3 words appear on one line in listbox
How can i make it so that each line of the textfile is placed in each line on the listbox?
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Jan 5, 2011
I'm expanding upon a tutorial we have in class for a cash register. The basic program is to put the name in, put the price in, then manipulating labels display the item name, price, tax, and price after tax. Three buttons being calculate tax, clear the form, exit the program.
[Code]...
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Apr 16, 2011
I've got a program which displays data in a listbox in five columns. All are separated using one or more ControlChars.Tab. I want to write these columns to a text file, however, when I do, my columns lose their alignment. I can change alignment so that it displays nicely in text file, but then it is off in list box. Is there a way to get what I see in my listbox to display the same way in a text file - maybe a different way of separating my columns (not using ControlChars.Tab)?
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Jan 27, 2012
The below is the content of my file(which is already sorted). Whichever is there between square brackets, relate to one transaction. The transactions can be groupa, groupb,groupc etc.
Jan 2012 02:10:12 [5678](groupa):Part 1:data1
Jan 2012 02:10:12 [5678](groupa):Part 2:data2
Jan 2012 02:10:12 [5678](groupa):Part 3:data3[code]...
I want to output the below data to another file using vb.net. It should contain the transaction group, followed by the time(the time should be taken from the first row of the contents grouped by transaction, then grouped by the number inside the square bracket, in the contents). Next line should concatenate the data(after Part [1-9]:), corresponding to the particular transaction grouped by the number inside the square bracket. For the above contents,
groupa at Jan 2012 02:10:12
data1data2data3data4
groupa at Jan 2012 02:13:14
data1data2
groupb at Jan 2012 02:13:24
data1data2
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Jun 10, 2010
I have a text file that has about 200 programs that were dumped from a cnc machine. I want to be able to take that text file and extract each program and save it as it's own text file. There is a distinct character at the beginning and the end of each individual program. I an new to vb and the projects that I have done to this date involve database front ends so i have no idea on how to work with text files.
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Mar 17, 2010
I'm using the SaveFileDialog to save listbox info into a text file. The files save fine, but when you go to save the file, if you hit the cancel button, it will overwrite the previous file you saved, because it's name was the same and it seems to save the previous file as the new name for your next file. Is there any way to catch if the user clicks cancel, and then exiting the sub if they did?
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Mar 1, 2010
I have a text file and a list box. what Im wondering is how I would get the listbox to list the text from the text file. sure, easy, but wait! in my text file, I listed web addresses and dates with tags in front of them. for example my file would be like: [Code] what would the best way of reading the tags and displaying it right in the list box?
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Dec 15, 2010
I'm a little new to VB, and I'm in a class for it, but I'm trying to do something we aren't going to learn in the class (mostly out of sheer interest) and I need help. I'm trying to read lines from a text file into a listbox, each line representing a new item on the listbox. For example, if the text file reads: [code]I want to be able to take that as is and read it into a listbox, where those words would appear in the exact same fashion; as a list, each as separate items. I've looked at the Help stuff and learned (sorta) about delimiters... but the thing is I don't want to write my entire list in a continuous line separated by commas--I want it to keep reading each line, and moving on to the next, until there are no more lines left. I am thoroughly stumped, and would appreciate it SO much if someone could help. For a frame of reference, this is the point I'm at now with my code: [code]Note that when I run the program, all it will do is read the first line of text available and stop; once I press ENTER in a text file, it decides to stop reading.
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Mar 7, 2011
I am trying to load a text file into a list box in order to be able to play the files see code below I have an error on this line Which states Error 1 Value of type 'String' cannot be converted to '1-dimensional array of String'.
Dim Open As New OpenFileDialog
Dim myStreamReader As System.IO.StreamReader
Open.Filter = "Text [*.txt*]|*.txt|All Files [*.*]|*.*"
[code]....
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Apr 20, 2010
My current project is to process several files. The files come from a Unix server and have been SFTP'd to the Windows XP machine. (That's fixed protocol, I don't have control over it.) My problem now is that the Unix new line characters and Windows characters don't match. The solution is to read the file line by line and replace 0x0A with 0x0D + 0x0A, or Asc 10 with Asc 13 + Asc 10, or vbLf with vbCrLf, however you like to say it.Well I have a working function to do this, but any extra speed I could squeeze out of it would be fantastic. The text files I'm working with can reach sizes of about 100MB. So to the question:
Q: What is the fastest way to read a file in, change characters as necessary and then write the file out?Here is my current working code.
Private Sub FormatCharacters(ByVal files As String())
Try
For Each fileName As String In files
FileSystem.Rename(fileName, fileName & ".old")
[code]....
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Jul 17, 2009
I thought you could use a structure as a container. I have line_1 with a line of data read in from a file. I only want to Look in position 1 of the line and position 8 for 9 and position 31 for 11. If I create a line_2 with the parts broken out for pieces that I want to look at then I could use a with statement right?
[Code]...
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Feb 2, 2010
a text document containing information as:In/memory of/wendy/smith 6th of march 1545/ foreever in our thought/love liz and pony/i`ve got to develop a software in vb that will read the text file above and extract names, date.for each inscription it is required to display on a computer screen, IN TABULAR FORM, the details mention above.
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Oct 3, 2009
I am looking for tools that will enable me to search and manipulate pdf files and pdf vector graphics. I want to search a pdf image/file for specific content and then manipulate the image. Are there any known resources out there? I have looked at the documentation on the Adobe web site, but I don't know where to begin. I'm looking for books or a forum where I can get specific information and examples.
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Jun 10, 2009
This my code
Dim lngLines As String[code]...
at the moment i want to read all lines in text file to add in listbox
but i don't add strings x, and string y add in listbox, and back read line
but string y not add in listbox
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Feb 26, 2012
I have a list of .txt, .doc, .pdf on my listview. How do i code this problem;
1. When i double-click the item (sample.txt) on my listview it will open in a notepad.
2. When i double click the item (sample.docx or sample.doc) it will open the MS word and shows me the things written on the particular item.
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Sep 6, 2009
I am trying to load a listbox from a text file, I have debugged the routine and have used the "step into", I have the routine in the Form Load section, it shows the names being loaded but will not show in the listbox itself, please please give me some ideas I have been racking my brain for days on this,
[Code]...
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Feb 5, 2009
So i have a text file that is created in the program which can be loaded back into the program(game save)
Whatever is in the text file "stats" should be listed in listbox1 in the same order it is in the text file. The same with "items" in listbox2. And then "quests" will be in listbox3.
The problem is when i load it instead of what is in the text file it says...
note that box3 is correct that it has nothing in it.
[Code]...
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Feb 18, 2009
How can i open a text file in listbox? File have for example some names, one/ row:
row1 Johny
row2 Jimmy
..
when i press on johnny label1.text = johnny I know how to do it in vb 6 but in vb 2008 i don`t know?
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Jan 4, 2012
[code]...
When I click Cancel program crashes,how to solve it.
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Mar 5, 2009
im tring to get vb to print all the items in a textbox to a text file Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click For Each liststring As String In ListBox1.text liststring = liststring & vbCrLf My.Computer.FileSystem.WriteAllText("C:\sample.txt", liststring, False, System.Text.Encoding.ASCII) Next End Sub
am i going around the wrong way doing this? because this prints a selected item and also prints each letter on a new line
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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
[Code].....
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Nov 11, 2010
I have been working on this for quite some time now. I have a listbox that loads the names from a .txt file. When the user selects names I need it to delete the items from the list. I have the code to remove it from the listbox, but when I reload the form it puts them back in because it's reading the file.
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Feb 26, 2009
Been trying to search the internett and this forum for this commands, but I might have been searcing for the wrong word. Here is the thing.I wanna make a file at the same time as I add it to Listbox.I prefere that the file has the same name as my first label, as there will be 3 more text feelds in that text file.
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Feb 11, 2009
OK here is what i have so far Public Class Form1 Private Sub RichTextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs)End Sub
[Code]...
now when i do that it dose read the test that i have in the text file but all in one line in the actual text file thay are on diffrent lines. Also dose any one know how i would read of a web server e.g [URL]...
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Aug 4, 2011
i am currently writing a program, that takes an order in one form, asks for the location on another form writes this data to textfile, named accordingly to the location. at the moment i am still finding a way to write the listbox to a textfile. when i google "Writing listbox to a textfile" most of the code below comes up.when i check the new text file, the text is not written, and instead i have "System.Windows.Forms.ListBox+SelectedObjectCollection"?
Private Sub Location_btn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Location_btn.Click
Dim neworderlocation As String = "I:\test.text"
Dim datasave As IO.StreamWriter
[code]....
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