Write To Sequential Access File?
May 1, 2010I 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
View 1 Replies
ADVERTISEMENT
Write String In Sequential File Without Quotation-mark?
Dec 4, 2009How can i write string in sequential file without quotation-mark?
View 3 RepliesSequential Access File In VB
Apr 27, 2012I 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...]
Sequential Access File And Storing Them In An Array?
Feb 10, 2011Sequential Access File and storing them in an array?
View 16 RepliesFile Access - Read A Sequential File Into A Listbox
Jul 6, 2009I 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]...
Searching And Displaying Data From A Sequential Access File?
May 27, 2009Im 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]....
VS 2010 Reading From A Sequential Access File And Storing It In An Array?
Feb 9, 2011what 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.
Passing Array Values (sequential) To A Range (non-sequential)?
Jun 12, 2009I am trying to copy the values to another sheet but not in any sequence eg.A1,B2,C4,D7 ........and so on. I am trying this slick way of doing it by the code below ( found on the web) without success so far but I got a feeling I am close to the solution. I am new to any kind of Programming. This is my first attempt. (so a chuckle or two is ok after seeing my "difficult" problem)
(This is an excel VBA Prblem)
Sub justdoit()
Dim s As Variant
[code].....
VS 2010 Multi Threading Access To Module Level SEQUENTIAL Counter?
Feb 22, 2012I've got this code
Public Class Form1
Dim m_listener As HttpListener = Nothing
Dim m_asyncCount As Integer = 0
[code].....
File I/O And Registry :: Deleting Lines In A Sequential Text File?
Mar 22, 2009I 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..
Create And Write To File - Error: Access To The Path
Feb 19, 2011Im trying to write to a file I created and place "Unregistered" in it. Thought it would be a simple task but keep getting an error. Its happening when I try and open the file to write. This is the error: Access to the path 'G:\Projects\Project\pbss\bin\Debug\5\pbssv\Data.DB' is denied.
Ive tried adding the file attributes to read-write and still get the same. Most of the code ive looked at via a google search points to the same as ive got for the Added default value area. Im not sure if there is a conflict between the 2 different ways im accessing the file when creating and writing too? [Code]
Create Txt File And Write To It Without Access Denied Lock?
Jan 24, 20121. I have to create a file. 2. Then I want to write a string into the text file.
I can do part 1 no problem with: File.Create(strFilePath) But when I try part 2 to write to the file it won't allow this as it's still being used:
sw = File.AppendText(strFileName)
sw.WriteLine(strCode)
sw.Flush()
sw.Close()
My code in part 2 works fine on a file that hasn't just been created.
How do I release the file from the File object?
There doesn't seem to be a .close or .flush option.
Read / Write File - Unauthorized Access Exception?
Aug 4, 2010I am creating a file and then trying to read and write to it. I'm coming up with an UnauthorizedAccessException wa unhandled. My question is, How do I get around this properly or otherwise improperly to read and write to my text file?
Imports Scripting
Imports System.IO
Imports System.Security
Imports System.Security.Permissions
Public Class Form1
[Code] .....
What Is A Sequential File
Oct 13, 2009My 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?
Create Sequential File With Path?
Jul 1, 2010create sequential file with path?
View 1 RepliesGetting Error Reading A Sequential File
Apr 15, 2009I 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]...
Sequential File Processing In VB 2010?
Apr 2, 2012Is 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.
View 1 RepliesSequential Text File To List Box?
Mar 14, 2012had 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].....
Using A Sequential File To Display Votes?
Apr 27, 2009So 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]...
VS 2008 Searching A Sequential File
May 2, 2010I'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.
View 1 RepliesWriting To Sequential Text File?
May 1, 2010I 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 to the vote count. I got that much to work, I need to save the vote to a sequential text file, when a vote is saved. I know I am close but it is just not quite working. I only need help getting the info to save to the sequential text file. I have also included a jpeg of what the form looks like.
[Code]...
Filling A Listbox With Data From Sequential File ?
Feb 11, 2011I 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:
Load A Sequential Text File Into A Listbox
Apr 14, 2009i'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:
VS 2010 Create Sequential File Arrays?
Nov 25, 2010reading words from a text file and displaying them at random.The format of the text file is....
verb
noun
answer1
[code]......
Connecting Up A Sequential Text File To A List View
Mar 13, 2012What I am trying to do is connect a sequential text file up to a list view. It displays alright but i have a button which is to add certain details to the sequential text file, but instead of adding it in comma separated variable format, i.e. John,Murphy, etc... horizontally it adds the information vertically downwards, i.e. John
View 5 RepliesDatagrid Displaying Details From A Sequential Text File?
Mar 13, 2012I have a datagrid displaying details from a sequential text file. I need to have a button to search through this textfile and display only that line of data in my datagrid. I am using an input box to enter the persons name they wish to search for. The datafile contains several lines of info like : John, Murphy, 35, etc.
[Code]...
Listbox Populated With Data From A Sequential Text File
Mar 14, 2012In 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]
View 4 RepliesRead Sequential File Generates Blank Lines?
Feb 13, 2009I 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]...
Sequential File Input - Overload Resolution Failed
Jun 26, 2011I am trying to read from a text file called: "NameList1.txt". It has four lines and two variables seperated by a ",".
The following is my code:
FileOpen(fn, NameFile, OpenMode.Input)
Do While
Not EOF(fn)
Input(fn, a, b)
txbFirstData.Text = a
txbScndData.Text = b
Loop
"End of code"
fn is the freefile number and "NameFile" the the path and filename.
I get the following error:
Overload resolutionfailed because no accesible 'Input' accepts this number of arguments.
VS 2010 - Populating ComboBox With Lines From Sequential File
Aug 20, 2011I'm working on a new version of something I had created years ago in VB6. What I was doing then is populating a combobox with lines from a sequential file ("title","URL") like this:
Open "data.dat" For Input As #1
Do While Not (EOF(1))
Input #1, NameInput, URLInput
cmbEntry.AddItem NameInput
Loop
And then checking against it on a button click to load the URL associated with the selected name:
Open "data.dat" For Input As #2
Do While (cmbEntry.Text <> NameInput) And (Not (EOF(2)))
Input #2, NameInput, URLInput
Loop
[Code] .....
What I'm trying to do in Visual Basic 2010 is the same process, though I'll be including a third field ("category","title","URL") to determine which one of four different comboboxes I add the entry to. I know I need to use streamreader, but I'm not finding much in the way of documentation or examples on how to do what I'm trying to do, which is:
- Populate one of four comboboxes with the second value in each line of an external text file, based on the first value in that line
- Set a string to the third value in a line of an external text file, based on the second value of that line
How to read these values from the file.