Use Textbox To Edit A Textfile Csv Which Has Been Read Into An Array?
Nov 28, 2010
I've got a csv text file "test.txt" in the following format with one record per line in the following format: Builder,Bob,B,99HappyStreet,Springtime,4
I've read them into an array and in design use the first two to populate a listbox and then use a selected index to fill text boxes and some list boxes.
How do I write the changes made in the text fields back to the position in the file where it was? It has me stumped although I'm sure there is a SelectedIndex option that can work.
I've considered having all the new/changed data saved as a new record and then just deleting the 'old' entry but my delete code gives me a selectedindex-1 index out of range exception error that I'm working on as well. I am sure both problems are related.[cod]e...
I have a textfile I need to open and I need to put each line into the array. What is the simplest way to add the elements/each line's data into the array while increasing the array as it reads each line? This is blowing my mind right now..I thought about using a counter and then redim-ing the array (while preserving of course).
The code below allows me to write a single line to a textfile. Id like to be able to open an entire textfile into a textbox, be able to edit said text and have it automatically write back to the same textfile.
Private myCoolFile As String = "C:UserskevinMy Documentspasswords.txt" '// your file. Private myCoolFileLines() As String = Nothing '// String Array to read File Lines into. Private sTemp As String = Nothing '// temp String to be used as needed.
- Read a CSV file into an array - Get this visible in a list box, so the values can be: - Sorted - Edited - Deleted - Added - Finally save these manipulated values back to the text file
I have a combobox (combobox1) with a list of countries, Canada, USA, UK as an example. For each country I have a textfile of cities. I choose a country, which populates combobox2 .i.e. I select Canada from combobox1. Combobox2 shows cities for Canada. I also have a button 'Edit Cities' What I want to accomplish is the following:Open some type of text editor (like notepad) and allow the user to either delete or add items to the list of cities then re-save the file back to the resources folder of my program. I have been successful in reading the textfile to a messagebox but of course can't do anything with it.
Here is a code snipet I have so far:
Private Sub btnEdit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnEdit.Click If combobox1.SelectedIndex = 0 Then Dim fileReader As String
I have a program that reads a text file tab delimted using OLEDb I need to be able to allow the user to insert a user created record into the file which I can do. The problem is I need to be able to let the user edit that record. From my understanding you can not edit or delete with OLEDB only insert So I thought I would read the file using stream reader, find the line I want to edit and just delete it, rewrite the file, then let the user insert a new record?
Dim strDelimiter As String = vbTab OpenFileDialog1.InitialDirectory = "C:\" OpenFileDialog1.Filter = "Text Files (*.txt)|*.txt"
I need to check the size of textboxes in a webpage. I have already written the function which retrieves the maximum size of textbox and which writes the html codes of the webpage in a textfile. suppose i have these lines in my textfile:
I have a textfile which is in the following format.
[code]...
There are only 5 rows and two columns. each field is seperated by a space (" ") What I'm trying to do is display column 2 value 1 in textbox1, column 2 value 2 in textbox2, column 2 value 3 in textbox3,column 2 value 4 in textbox4 and column 2 value 5 in textbox5.
I want read the content of the text file and write to vb.net application. My text file name is wires.txt. The above code only read and the file appear on the application. I dont want the file to be visible to the end user.
I'm trying to place the contents of a text file (just a list of names) into a list box when the form loads.
My code currently looks like this:
Imports System.IO Public Class Form1 Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[Code].....
I can get the names into the list box, but they're all on one line. I thought about using a For...Next loop to read the contents of the text file, but I got into all sorts of trouble; do I need an array with that method? So I've got back to the code I originally had.
I have a form with 2 listboxes. I've added items in each listbox. I save all the items from each listbox to a text file. What I want to do is open the text file and I want each string inside the text file to go to the appropriate listbox. How can I make my program recognize where each string belongs?
I have my code it is able to read a text file and do checks each line if there are 7W and 5L in that particular line, if no matches it will remove that line... 1 problem i face now is that, there are duplicates in my textfile..Im not sure how am i going to remove the duplicate in the text file. I want to know if there is a way to integrate an additional function inside my code to check if that particular line is a duplicate so i can accomplish 2 tasks at 1 time... Since there are about close to 1million records in my text file.
I have a txt document here that have certain word on it per line. How can I show it in different labels. I have 25 labels and have label name as followsword1,word2,word3,word4,word5 and so on up to word25. I want the word 1 label will show the first line of the text file and the second word2(label name) will show the second line of the textfile and so on up to the 25th line . Can it be done using loop?I tried but I dont know exactly how readline process works to identify certain lines you want to read and also I tried using the "i" variable to auto generate the name of my label but it did not work.
Dim timepath As String = "C:ACCOUNTSAccount" + user1 + " ime.text" Dim times As String Dim timeread As New System.IO.StreamReader(timepath)
What I am trying to do may be better for use with SQL Server but I have seen many applications in the past that simply work on text files and I am wanting to try to imitate the same behaviour that those applications follow. I have a list of URL's in a text file. This is simple enough to open and read line by line, but how can I store additional data from the file and query the data?
E.g. Text File: link1 - 0 link2 - 0 link3 - 1 link4 - 0 link5 - 1
Then I will read the data with: Private Sub ButtonX2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ButtonX2.Click OpenFileDialog1.Filter = "*txt Text Files|*.txt" If OpenFileDialog1.ShowDialog() = DialogResult.OK Then Dim AllText As String = My.Computer.FileSystem.ReadAllText(OpenFileDialog1.FileName) Dim Lines() = Split(AllText, vbCrLf) [Code] ..... Am I going completely the wrong way about storing the data after importing from a text file?
This is my first time using a list vs an array but I'm having a bit of trouble. I am trying to read a textfile into a list of song objects. I am reading the file successfully into the list however after the loop ends the program stops executing the load event and ignores the populateListBox() procedure. Any thoughts.
how do i have my app read a line from a textfile and if that line equals "whatever" proceed with command, this case a msgbox.so much work to do and so many choices to choose from...
I came upon your forum while googling my problem. I respect the fact that you don't do someone else's work as I wouldn't either. But, as a beginner I have a lot of questions so hopefully no one minds.
I want to create a set amount of threads, and have those threads open the same file, and then each thread will go read a different line all the way down to the end of the file. Also I do not want to use thread pool, so I have to create the threads. I have the code to create threads, but I need help on the file part:
Try Dim s As New IO.StreamReader("C: est.txt") For i As Integer = 1 To 4 s.ReadLine()
[code]....
this only reads one line and proceeds with command.. how can i fix this to be able to read multiple lines, like read line 7, do command, read line 9, do command, etc..so much work to do and so many choices to choose from...
