I have just recently been using VB 2010 after using VB5. I have noticed a lot of changes. The problem I have is that I wish to open and save text files to and from arrays in the background. I've attached what I would do in VB5. I have searched around, but all the examples I find use a Textbox instead of an array. Can anyone show me how I can do this with VB 2010?
View 1 RepliesSo I need to write out an object to a text file as well as read in objects from text files.How do I accomplish this? This is the code i've used to read and write just simple lines of text. Is there a small modification to this or just a different function i use to read in an entire object?
Code:
Dim path As String
path = "Security.txt"
[code].....
I am trying to import a TAB (NOt comma) delimited text file into a DataGridView. The following code works fine if I have a comma separated file. All I have to do is change the FMT to "Delimited".It just does not work with FMT=TabDelimited. All columns are read into single datatable column. The text file is ANSI text and I have double checked to make sure Tabs are tabs and not spaces, even exported a sample Tab Delimited file from Excel.Can this even be done using Text Driver? [code]
View 2 Repliesi created a text file with some employee data in vb 2005, on my form i i have a bunch of textboxes and a combobox. i can load the employee numbers manually into the combobox but want the employee details to show in the textboxes when selecting the different employee numbers. i declared a structure with the various fields and a reader to read the text file. here is where i am stuck. my code thus far:
Public ABCStreamReader As StreamReader
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how to read and write a text file in vb.net
View 7 RepliesHow would a person read a line of a text file by the number of the line. In other words, if I wanted to get the 3rd line of the file, how could I store that third line in a variable. While I'm at it, I might as well also ask how to do the opposite, or write text to a specific line (in this case, writing over the other information on the chosen line).
View 2 RepliesI'm using visual basic 2008 express to do some simple stuff. For this project, Im reading in one large text file.The top of each page has a header section that is always the same, except sometimes a dept# changes, signifying a new set of data.The first line always has the text "RunDate", so when I read that, I know that I'm at the top of the first page.After reading the first line, I'd like to immediately go to the sixth line and grab that dept# and store it.dept = left(trim(myline,7)(Its always 7 characters long) so I know what dept I'm working on.I'll then loop through and write each line to a new text file, until I hit the top of a new page.At that point I need to look at line 6 again. if the dept # is the same, I'll keep writing to the same file.Reading and re-writing from the text files is easy, I just loop through line by line, but I need to be able to jump down to the 6th line, and I don't know how to do that without reading each line to that point"
View 2 RepliesThe program that I am writing has three default variables that I would like it to store and also be able to change. I have them in a text file called "settings.txt" The format of the text file is as follows:
Default Source "I:DCIM101MSDCF"
Default Destination "C:Documents and SettingsChristyMy DocumentsMy Pictures"
Default Backup Destination "D:My DocumentsBackupMy Pictures"
The field descriptions eg "Default Source" take up 30 characters, so the variable data starts with character 30. I know their has to be an easy way just to pull out the data from a particular line starting with character 30 but I can't find it.
I'm writing a program where there are text boxes and the user can enter info and append them to a text file as well as read from the text file and view the various entries in it. The problems I'm running into are that I have a button that opens an open file dialog box allowing you to select the file, and I want to get it to open the first entry of that file in the correct text boxes. the code so far looks like this
code:
I used to have this bit of code in there but there was a conflict with the .txt file being used more than once at the same time while it was in there.
code:
Im also having trouble writing to the file and I'm not sure why. I have an "Append" button that has this code in it
code:
and it comes up with the issue "object reference not set to to an object instance".
I have a 2 text files
Text file 1:
.ERR - Max6 Error file
[2 19.40 44.7] X6.950 Y-4.705 106.522, 222.048
Open -106.522, 222.048
[2 05.52 39.6] X7.720 Y5.010 214.550, 205.048, 101.078
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But it not writing anything as output..
I have a 3 text files
Text file 1:
.ERR - Max6 Error file
[2 19.40 44.7] X6.950 Y-4.705 106.522, 222.048
Open [code]....
From here i have to read the Node name which is MEM_B_DQ7.Then match node name with third file and get that node name group
Text file 3
NODE MEM_B_DQ7
PINS
I have a 2 text files
Text file 1:ERR - Max6 Error file
[2 19.40 44.7] X6.950 Y-4.705 106.522, 222.048 Open -106.522, 222.048
[2 05.52 39.6] X7.720 Y5.010 214.550, 205.048, 101.078 Open -214.550, 101.078
[2 07.69 39.2] X7.786 Y3.489 215.574, 214.075, 204.067
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This is what i wanna do and dont really know how:
When i click button "StoreX":
if X.ini does not exist it will be created at the same folder as application
NumericUpDown1 value stored at X.ini line 1
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Their is a problem whenever I want to write something to a text file. Please see the attatchement to see what happens when I'm debugging. I've put the code for writing to file right at the end of the program.Here is some of the code which shows how the program writes to and reads from the file:
Option Explicit On
'Force all variables to be declared.
Imports System.IO
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I have just recently been using VB 2010 after using VB5. I have noticed a lot of changes. The problem I have is that I wish to open and save text files to and from arrays in the background. I've attached what I would do in VB5. I have searched around, but all the examples I find use a Textbox instead of an array. Can anyone show me how I can do this with VB 2010?
View 3 RepliesAn application that my company uses stores report files with a .dat extension for use with their software. These files can be opened in notepad and the basic report information can be seen as text. I am attempting to write an app that opens and reads data from these .dat files and displays it in a checked listbox. My hangup thus far is that I can't figure out how to read the data from the .dat files since they are not .txt files. Can anyone point me in the right direction?
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(First off all hi to everyone my first post!) Ok, i have two programs one program writes to a text file on a consistent basis, while the second program is opening this text file on a consistent basis for reading.. Sometimes the programs are accessing the file at the same time and the user keeps getting this error : this process cannot access the file because its already in use..
Is there any class, in system.io that i can use to modify the settings of this text file so both programs can access it at the same time?
I would like to know how to write to a text file that is added to resources and then have it show the contents in a text box.But I would like to have it on a timer so every second it will refresh as I am trying to make an instant chat program.Also I would like to note that I want it to delete everything after all the users have closed the program. Is there any way to make it so the text file is empty when there is no body using the program any more?
Public Class Form1
Private Sub btnSend_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSend.Click
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Even a primer on just reading/writing to a text file would be golden. The array confuses me further, but understanding the data is primary.
Basically, we're writing a program to manage inventory for a bar. Fields and a few lines are below. The delimiter is "||"
So... How do we read the data into the arrays? NAME would be strName(), etc for all of them.
how to write and update existing data.
UID||BREWERY||NAME||SIZE||FORMAT||SEASONAL||PRICE||CASECOST||CASEQTY||BREWERYLOCATION||BREWSTYLE||ST YLE||ABV||CLASS
A0101.12B||Abita Brewing Company||Abita Amber||12
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I'm trying to create a program that stores a users stats for their character (for something like an RPG). I know how to write more than one line in a text file, but I want to learn how to read and write text on specific lines of my file. I know that you can just read each new line individually in order using a StreamReader, such as
username.text = readLine.ReadLine()
userage.text = readline.ReadLine()
[Code]....
This is good for just displaying the stats and changing them from a constant interface, but I'm afraid that eventually I'll need to read/write specific lines, like reading the fourth line which might specify magic level, or writing a new money amount.
My problem is i want to be able to write a url to a file. But there are a few problems.First one is the file is "unknown" to windows. Its the windows host file. which has no extension.second one is i need to write a line 21 lines down (making sure it does not over write any previously stored text. The line should look something like this
View 3 RepliesI require some help in saving and reading files in Line by Line format, How would I save to a specific line in the text file, or read a specific line?
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I have the same problem that Niphoet had in this thread: vb .net overwrite a specific line in a text file
I am trying to implement the code that Axarydax showed in C# that I am trying to translate to use into vb.net. My problem is that the code will make my new text file but will not write any of the lines from the other text file to it and just leaves it blank. I think my problem is with the while loop statement but I am not sure.
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I'm currently making a program that will be used to practice German. It reads from textfiles that have English words (noted by # prefix) and German words (noted by $ prefix). An example of this:
#hello $hallo
#good $gut
#evening $abends
The way it currently works is it loads a text file, finds all # and splits to an array called "English" and finds all $ and splits it to an array called "German" What I want it to now do is feed the "English" entries into textboxes on the left, and "German" onto textboxes on the right so I can then match them out and make a sort of memory game out of it. Unfortunately, I don't know how I would loop an array through multiple textboxes. Conveniently, the textboxes on the left have even numbers, and the ones on the right have odd. Is there a way to possibly find all evenly numbered textboxes and loop "English" array entries into them, and the same for "German"? I've realised this has now gotten a little convoluted, but hopefully somebody understands. I can screenshot the form for better explanation, and copy my existing source code if anybody wants it.
I need to write data to a file, preferably in binary format, but I am unaccustomed with the concept. Where's the easiest place to get the basics? I could come here with a specific need, but I'm at the point right now where I am more willing to work within the confines of keeping it simple.
Here's what I know:
1. how to open a new file
2. how to specify the record length
3. how to close the file
Some specific questions:
Does the record length have to be constant throughout the file?
Can I read the nth record without reading the whole file?
I've had a bit of a look around the net and on the forums but I've yet to find an answer to my question. I've got Visual Basic 2008 Express and I'm trying to write some registry entries, I can write strings fine just using
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I want to be able to able to read the dimensions of a TIF image without loading the entire file.
PS Using Visual Basic 2008 on Vista64.
I have a structure in memory which is working fine - now I need to write this entire structure to a file.The below code almost compiles, the problem is that "mstaRecordInfo" cannot be changed to a string, probably because of the Date field. I've just spent over an hour experimenting and searching the web but have gotten no closer to a solution
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I am trying to print the contents of my array to a text file, but instead of just printing whats in the array it prints all indexes even if they are empty.
this is the code i am using..
Code:
FileOpen(3, "garbage.txt", OpenMode.Append)
Dim intCounter As Int16
For intCounter = strFirstName.GetLowerBound(0) To strFirstName.GetUpperBound(0)
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for a school project I have to write data from a listbox to a new file that a user can create. I can create and save a file no problem, but for some reason I can't write anything. I followed the textbook provided but when the file saves, I open it up and it is blank. I'm using fileWriter.WriteLine and I'm just test something basic to write to a file first and I can't do it:
Code:
Private Sub storeFileButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles storeFileButton.Click
'creates a new file
Dim result As DialogResult ' stores the file
Dim fileName As String ' name the file to save the data
[code]....