i have a problem reading from a file in vb.net. I want to read from a file bit by bit so the file i write to is exactly the same, well almost because im planning on merging two files together but i can do that if i can figure out how to read and write exactly as the file was. I cant seem to get streamreader to work on non text files.
View 3 RepliesReading 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?
I am working on a program with multiple collections related to one another for a school project. Each collection needs to have its own defined properties and have the objects written (1 per line) to a text file.
I have all of that working.
When reading the comma-separated line from the file, I want to place one of the properties of the object in a listbox (so that all the objects' names will show up in the listbox). I think I have this part figured out...
My problem is that when you click on the name in the listbox, I would like multiple text boxes to be populated with the appropriate, corresponding properties of the particular object in the collection...is there a way for this to be done?
i have a structure of;
name
age
gender
location
then i need to read in a file into an array on the structure above, and pretend this is the file which has 3 people
george
45
m
usa
[code]....
so basically i dont get how to read in a file then put it in the array in that structure then make it into a csv file?and whats the difference between streamreader and streamwriter?
What my program does is load a file (password list), then progressively reads each line of text in the file whilst writing each line to a new file. After X amount of lines have been written, it should start writing the lines of text to a new document until the initial password list has been split into X amount of password lists. The problem I have is that after hours of tweaking, all I can get it to do is write either blank ocuments, or write all of the lines to only one file. I really need it to be able to split into multiple files, preferably at runtime rather than loading a whole text document into the program in a textbox or array then writing it to new files.Below is the source:
Imports System
Imports System.Windows.Forms
Imports System.IO
[code].....
I have dev.xls file with sheet name as "Electricity". In my vb.net winform application, I want to read all this data and write it into another xls file (Test.xls) with sheet name as "Electricity_Processed". Looking for a way to do this without using other dll's or Interop
View 3 RepliesI have a problem and hope someone have idea to rsolve it. I have a file and inside the file the format is like that :
123.567 456.789 12.345 223 223 221 223
123.555 456.788 12.344 223 223 221 222
123.456 345.678 456.234 445 445 445 445
total line is 3456789903. I want use vb console application to read the line and every 130000 line create a new output file.
i'm trying to read from a file and copy the text into a 2d array withought the selected item from a list box then rewrite the file from the array into the text file. however it writes a single part of the array times the variable count when i write back to the csv file. within the array everything is correct its only when i rewrite to the file is when the problems occur.
[Code]....
i am using VB2008 to develop a Settings program for my game Lined World, creating with Game Maker. I've created a settings.ini:
[screen]
fullscreen=(off or on)
resolution=(800x600 or 1024x768)
[code]....
answers are depending on settings
now, i wanna create in the settings app the following:
"fullscreen" (radiobutton-on & radiobutton-off)
[code]....
if radiobutton fullscreen is on, [screen]fullscreen must be on, and if turned to off, the INI value should be "off".
I'm creating a project where I need to store information in two files. As I understand, I can store information in a text file or a binary file?
View 2 RepliesI am struggling with vb.net. I can read from a file but not able to establish a writing object. what I have so far is this.
Imports System
Imports System.IO
Imports System.Text
PublicClass EuroConverter
PrivateSub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[Code] .....
I have a DB stored on our internal site and I want to read/write this file as it's updated. How do I download the file, then upload it after changes.Here is what I know about the link
Protocol: HyperText Transfer Protocol with Privacy
Type: XML Document
Address: [URL]
I'm looking at an old web app I wrote and it is taking about an hour to read 4500 records from a DataTable so it can write them to a CSV file.
The DataTable contains... 376 columns
At least, I think that's what Excel's NL column converts to. I just looked up the column count now and had no idea there were so many. Our software vendor hasn't realized the value of dynamic sql statements for this process, so every software "upgrade" just keeps adding more columns rather than only selecting the ones needed. I cannot alter the SQL statement that generates the data
Depending on the data type, the data needs to be formatted in a specific format Data does contains special characters, such as commas The slow part is reading the data. Getting the data from the SQL server and writing it to a CSV is fast.
Here's the code. Forgive the mess, I wrote it back when I didn't know what I was doing and when I still was working in VB
Function ReadDataTableForCSV(dt as DataTable)
Dim sb = New StringBuilder()
Dim dataTypes As New Dictionary(Of String, Integer)
[code]....
I was unable to find anything in my searches for XML or INI on the forum so i apologize now if this has already been asked and answered before.
I have been searching Google for days now, trying to find information on Reading and Writing XML files. I wish to use them to replace INI files in my programs.
I have been using VB6 for years now, but was able to get a copy of VB.NET 2003 really cheap and so i am trying to learn how to do the things i did in VB6 in VB.NET 2003.
I was able to find code to write to an INI file, but was not able to successfully read from an INI file with any of the code i found.
I have been able to find code to write an XML file, but when i try to update it, it replaces the old file with a new one, and the old settings are missing, instead of the new settings added to it.
i can at least start migrating to VB.NET 2003, or if you read XML and update XML data, i can switch now. Here is the code i have for writing XML.[code...]
I have search on google but i have just find this function SteamWriter. This fonction for writing work, but the script create always a new file... I want write under the last line.And with your fonction, how i can read it line by line for use in select menu.
View 3 RepliesI am new with VB 2008. I want to use txt file to store some parameters which is used entire of the application. I want following tasks;
1. creat the text file and give particular path where file must be saved.
2. Write values like TEXT{Tab} Value.
close the file
3.save the file.
4. open the file and read the only values and set into particular textbox on the form.
5. close the file.
Some times i need to search the particular value or TEXT. How i fullfill this task.
How Can I load data into my datagrideview from xml file
View 8 RepliesMy text file look like this;
M48
METRIC,LZ
VER,1
FMAT,2
DETECT,ON
[CODE]..............
I must read the file scan for value T250,T169,T168,T170,T176............which ever value start with T after the line"DETECT,ON". then i must sort these values so that it will be in acending order. Then i must write back that values in same text file after the line FMAT,2.. Now i can read the lines which contain T. Then i store that lines in array. My code shows error when i used sort methode to sort the array which i store in array.
This is my code
Dim filename As String = strFileName
Dim i As Long = 0
[CODE]...........
The sort methode give me this error "Overload resoulation failed because no accessible 'sort' can be called with these argument". Why it shows this error and how i write back the value after sort. Can i use append Text methde.
I'm new to VB.net and have only a few projects under my belt. This one has me stumped!! I need to open a file and search its contents hex byte by byte. (Similar to Hex editor). On finding a particular value I need to replace it with a set hex value then write and close the file. So far I have only managed to read / write the ascii equivilant.
View 4 Repliessay i have this:
[Code]...
I'm very new to VB.net, have not a clue what i'm doing. I've googled around for over 2 hours now, and can't find anything, not even something that reads the info, and displays it.
how do i read / write to a remote xml file with vb.net?
View 2 RepliesI've got another simple problem. I want a 'survey' form to show up whenever the user opens the program for the third time. I, of course, have the survey form built.[code]...
View 6 RepliesHow do I read a raw byte array from any file...
Dim bytes() as Byte
..and then write that byte array back into a new file?
I need it as a byte array to do some processing in between.
I'm currently using:
To read
Dim fInfo As New FileInfo(dataPath)
Dim numBytes As Long = fInfo.Length
Dim fsAs New FileStream(dataPath, FileMode.Open, FileAccess.Read)
[Code]....
I have a text file which look like this:
M48
METRIC,LZ
VER,1
[code].....
After two days of looking I give up. The basic problem is that at the end of my program I need to be able to write out a text file and then read that same text file back in when the program restarts or reopens. The best and easiest way I have found to read in the file is to place the text file with in the Resources and use this code.
Dim ReadingIN As String = My.Resources.Mytext
So then I want to be able to change that string and then write it back out. Part of the problem is I want to be able to use this from a flash drive or a changing directory.
I have tried but it doesn't work
Dim WritingOut As String = ReadingIN + "Edited text"
Dim DirString As String = My.Resources.Mytext
If System.IO.File.Exists(TemperString) = True Then
[Code].....
My text file look like this
M48
METRIC,LZ
VER,1
[Code]....
The sort methode give me this error "Overload resoulation failed because no accessible 'sort' can be called with these argument"
Why it shows this error and how i write back the value after sort. Can ui use append Text methde.
I need to write the xml files into datagrid view but what i need also is to write to the datagridview and next to every row , the file name from where im reading the values from xml , example if have an xml file named : AIO , i want to read the values of the xml and add a column to the datagrid view that displays the name : AIO and so on the code that reads all the xml files and display there values in the datagrid view is below :
Dim FilePath As String = FileName.Substring(0, FileName.LastIndexOf(""))
Dim meter As New Stopwatch
Try
[code]....
I'm writing an application for my Smartphone (OS is WM6 pro .NET Compact framework 3.5). Up till now i used VB6 so i'm pretty new to VB2008.
The application needs to store a set of items in a text file located on the device and retrieve them back. Since WM 6.0 doesn't support MS Access databases i have to work with the old fashion text files to store and retrieve my data. However since i'm new to VB2008 (and given the limitations of writing a smartphone application) I would llike to know how to write and read data to and from a text file.
Im trying to read and write to a file in binary.to give an example of what im trying to do i have posted a picture below.the string is 12 bytes long and each four bytes has a float.the one in red is set at 1 and green and blue are 0 giving the read as the overall color. i have been trying to get this well i tried once and gave up but its been awhile.i have this so far but it doesnt work. this is kinda what i got to read the bytes out but its messed for i have been trying everything i could think of
Code:
Dim s1 As FileStream Dim br As BinaryReader s1 = New FileStream(Application.StartupPath & "/files/test1.bin", FileMode.Open, FileAccess.Read) br = New BinaryReader(s1) Dim bytes(12)
[CODE]...
I have this to write the color back from a color dialog
Code:If dlgColor.ShowDialog() = DialogResult.OK Then
PictureBox1.BackColor = dlgColor.Color()
[CODE]...
Just starting up on VB 2008 Express (.NET). Trying to write to and read from a file. It runs without errors, but the messagebox only shows the 'OK' button, not the contents of the file as I want. I thought that maybe I have to rewind the file before reading, but AFAICS there is no 'StreamRead.Rewind' or Reset or something.
[Code]...