File Access - Read A Sequential File Into A Listbox
Jul 6, 2009
I am stuck on an easy problem I'm sure, but for the life of me i cannot figure it out. I need to read a sequential file into a listbox. I can read the file into the textbox but i want to format the data in the listbox. for example i want to PadLeft(10), delete the excess commas, and give a heading for each column. here is the code i have and attached is the text file.
Imports System.IO
Public Class Form1
Private Sub exitButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles exitButton.Click
[CODE]...
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Feb 11, 2011
I have this assignment which has to read the names from a sequential file and store them in the names array. Then i have to sort the array in descending order and listbox. Only I'm having a problem when i try to implement the sort method. Theres no syntax error but the sorts not happening.
CODE:
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Apr 14, 2009
i'm trying to load a sequential text file into a listbox, and for some reason it won't move onto the next line? instead i get square characters instead
It appears like:
Where the square characters are, i want it to be an extra line as opposed to just that? here's the
Dim YOUREFILE As String = "C:Documents and SettingsAdministratorMy DocumentsPROJECTFILESYOURSTUDENTSCORES.TXT"
Dim objReader As New System.IO.StreamReader(YOUREFILE)
[CODE]...
Here's what the file looks like:
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Feb 13, 2009
I have a function that is reading a sequential file and storing it into an array by using the delimiters of
The first record appears correctly however, the second element in the array has two null lines at the beginning and at the end of the record. [code]...
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Mar 14, 2012
In my program i have a listbox populated with data from a sequential text file. [code] Mary, Murphy, 16, 893782, Douglas etc.From here the user selects the person they wish to see displayed in the datagrid with all all other relevant details from the text file displaying. Problem is I cannot figure out how to refer to the selected person and then get it displaying on its own in the datagrid. [code]
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Apr 27, 2012
I am working on a program in Visual Basic that incorporates using a sequential access file for a ballot type program. Each type the user clicks the save vote button, the amount of votes gets stored.
What I am trying to do is in my access file is to display the number of votes as an actual number. The way my program is written right now, the name of the candidate appears as many times as the vote was saved.
for example, if perez was voted for 4 times, in the access file perez is displayed on 4 different lines. How do I display the actual number of how many time they were voted for. I'm thinking using a counter variable, but not really sure how to really implement it in. this is what i have so far.
[code...]
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May 1, 2010
I am trying to create a program for a voters poll, where when a caller calls in, I can enter their vote for one of the four choices in the listbox and it will be automatically added
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Feb 10, 2011
Sequential Access File and storing them in an array?
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May 27, 2009
Im working on a program that will display a price when an item number is entered in the search box. I have the information in a text file for the program to find it but am unable. I have successfully made it so the items show up in a list box and will show the price when clicked on, but cant get the other one to work.
Here is my code for searching from a search box:
Option Explicit On
Option Strict On
Public Class TryonServices
[code]....
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Feb 9, 2011
what I have to do is read the 5 names inside the Sequential Access File and store them in an array. I'v encountered a problems in storing it in an array. Here's the code
Dim infile As IO.StreamReader
Dim names(4) As String
Dim filename As String = "names.txt"
[Code]....
Theres an error in the code saying that a string cannot be converted into a one dimensional array.
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Mar 22, 2009
I know that Deleting a specific line in a sequential text file is impossible but instead copy the needed lines and not copying the unneeded ones to an output file .. killing the old one and renaming the new one with the same.. I can't make this step...
That is my record file
Code:
Input #1, CustomerName, CustomerHomeAddress, CustomerBussAddress, CustomerTel1, CustomerMob1, CustomerID, DateRent, CarRegPin
Code:
"Josek Sam","68 West Land Street","149 Union of States","4524563","45635463","JOSKSAM1",#2009-03-02#,"MILANCGLZ2008"
"Josef Malm","142 Unions Street","64 Hamersters Street","452504","42542054","JOSFMALM2",#2009-03-06#,"MILANCGLZ2008"
"Dave Green","131 Oxford Street","96 BlueBane Route","452542452","43254345","DAVGRN3",#2009-03-07#,"MILANCGLZ2008"
I made a form that when you put your CustomerID in Text3 Box.. it access the records and make some calculations. now.. The customer will return the car.. Then his data should be deleted.. I want to know how to make that when I enter the CustomerID and press on the Command button .. It copies the other lines to a new output folder and doesn't copy these ... So it appears to be deleted using this way..
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May 28, 2009
I can't really explain what I'm trying to say but here is an example.
Example:
Created 1 Listbox named Box1
Created 1 Button named Load
[code].....
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Nov 26, 2010
I have a situation where i get a list of directories link for files in a listbox. let say i hav 5 links of diectories of a file in the listbox. how do check each directories for their md5 in the listboxt and have the value of the retrieve md5 in another new list box. i want to create a md5 file checker or scanner. need all the expert help on this cause i have been coding this program a month ago using visual basic 2010 express. i need a list of working code on my failing program...
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Jul 23, 2010
I am making a program, obviously, and I require some assistance. I found an explanation on how to read information from a Text file and have modified it for my needs. Here is my (modded) version:
Public Function GetInfo(ByVal playlistname As String) As String
On Error Resume Next
Dim PlaylistInfo As String
Dim ReadInfo As System.IO.StreamReader = System.IO.File.OpenText(My.Settings.OpenPlaylistName)
PlaylistInfo = ReadInfo.ReadToEnd
[Code] .....
I pretty much understood how to write text to a file, but I cannot grasp how to READ the information. After I read the information, I would like to add each seperate line to a ListBox. Each line in the text file is a file path for a music file, as the file I wish to read information from is a "custom extension" playlist file. I know what to do after I get the file path, but I do not know how to get the file path from the playlist.
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Oct 15, 2009
OK, straight to the point.I write folder names to a file like this :
Code:
Private Sub WriteExcludeFolders()
Dim SelFolders(clbExclude.CheckedItems.Count - 1) As String
Dim i As Integer
[Code]...
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Oct 15, 2009
[code]My program launches, I call the LoadExcludeFolds sub. This should read the contents of the textfile, and if it finds a folder listed in it, in the listbox, it should remove that item.[code]
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Nov 29, 2011
I'm trying to get a random line of text to appear in a messagebox upon button click, I want the listbox to be closed while the action is to be performed.
I can do it when the listbox is open but not when closed, here is what happens if I try to do it when it's closed
and the message "InvalidArgument=Value of '0' is not valid for 'SelectedIndex'."
I tried reading it straight from the .xml file the data is stored on, but that didn't go so well either.
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Mar 15, 2012
in resources there is a text file with items like number 1
[Code]...
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Apr 28, 2010
I found somethings and modified a bit the code so its can fit with what i needed.
I got it to work. Its read the text file but not i would like it to read.
In the ListBox, the text show up in 1 line as it should show in multi-line... (Yes, in the .txt file the text is in separated line.)[code]...
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Sep 12, 2009
I am trying to read a line from a file and add it into a listbox. The SelectedIndexChanged event of the listbox places the selected item (hence, the item I added from the file) into a variable that is declared as a Store (my own personal class.) I can easily add the line from the file into the listbox, but I run into a problem with the SelectedIndexChanged event. When I click on the item in the listbox, I get an error that says "Unable to cast object of type 'System.String' to type 'WindowsApplication1.Store'." (I guess this is because I added an item to the listbox that is from a file.) I tried a variety of methods of casting, but nothing seems to work. What can I do to fix this?
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Feb 27, 2012
Reading a .txt file in VB.net. My file path is C:UsersMyLilMulePepeDocumentsVisual Studio 2008Projectscurtain_calls.txt.
This is my line of Dim LoanOptionsFile As String = "C:UsersMyLilMulePepeDocumentsVisual Studio 2008Projectscurtain_calls.txt"
I can read the file when I run the program, but how do I write the file path so that someone else can download my program and file and read the file on their system?
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Oct 13, 2009
My teacher as asked me to allow a user to input three pieces of information about a DVD (the ID, the title and the running time) and for the program to add that data to a sequential file. My textbook fails to explain it and I am at a loss as to where my book from last semester is located at the moment.
1. What is a sequential file?
2. How do I display information from it into a messge box?
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Aug 25, 2009
When the user clicks the Process Files button, do the following:
Read and process the contents of each of the 6 files.
Each file contains data in a different format.
and display them in arrylist. In the list it should contain name of the file and number of person in the text file example below.[code]...
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Mar 15, 2012
Here's my code, all it does is display the numbers 1 - 10. I want it to display the numbers from the column Sales, from the table Songs.
Imports System.Data.OleDb
Public Class Form1
Dim con As New OleDb.OleDbConnection
Dim dbCommand As OleDbCommand
Dim strInsert As String
[Code] .....
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Jul 1, 2010
create sequential file with path?
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Apr 15, 2009
I am making c++ write a file to a folder of my choice in which it prints out my scores from a math test that c++ gives me. The problem is vb is kicking an error out
"Value of type 'String' cannot be converted to 'System.Text.Encoding'.
All the file is, is a simple .txt file named math_scores.txt that cpp outputs[code]...
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Apr 2, 2012
Is there an easy way to read in a comma deliminated file in VB 2010. In VB 6.0 you could read the file in directly to variables. It appears this has been removed in 2010.
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Mar 14, 2012
had a sequential text file loading into a list box this afternoon, opened the programme a few minutes ago and its not working! The text file was loading first name and surname onto the same line, but now it will only put the first name into it.
Private Sub frmSelection_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim Datafile() As String = IO.File.ReadAllLines("Datafile.txt")
Dim query = From line In Datafile
[code].....
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Apr 27, 2009
So i'm writing this program that puts the number 0-3 in a new line in a text file. The number thats stored is dependant on the index of the users current selection in a listbox. I have no problems coding the button that stores the votes but I'm having some problems with the button that displays the votes in each choice's individual label. This is what I have so far. I add 3 to the index each time because of the CR and LF that's caused by the ControlChars.NewLine that's used when modifying the sequential file.The problem I'm having is "Explicit initialization is not permitted for arrays declared with explicit bounds." on the line where I try to make the contents of votes equal to the contents of the sequential file. The error makes sense to me, but I don't know any way to get around this.
[Code]...
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May 2, 2010
I'm trying to get a program running that loads a sequential file such as "records.txt" into a two dimmensional array and searches the "records.txt" for the data that the user enters into a text box. Not quite sure how to go about doing this.
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