File I/O And Registry :: File Read/write From A Collection?
Nov 17, 2010
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?
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Jan 21, 2012
I have several programs that must write to HKLM in XP and Windows 7/64 Pro.The programs work in VB6 but not in VB.Net 2008 on target machines. It does works on our development machine. [code]I just cannot figure out why VB6 works but .net doesn't and fails only on the target machine not the development machine.
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Apr 28, 2012
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...]
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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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May 4, 2009
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?
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Sep 28, 2011
I am using Visual Studio 2008 on Windows XP SP3. User has Windows 7 Pro (32 bit). The IO code below works for me. The read code works for user, but the write code only works for new files. If the user tries to overwrite a current data file, then no data is written to disk. I have done all the usual IO checking (valid file name, etc.) and have excluded it from my same code. In my app, FileSave and FileSaveAs both call WriteDataFile(FullFileName). Any reasons why FIleSave would work on Windows XP, but not on Windows 7 Pro (32 bit)?
Code:
Public Function ReadDataFile(ByVal FullFileName As String) As Integer
' reads a Data file from disk
'
' Format is a text file, with [TAB] seperators and [CR][LF] as line terminators
[code]...
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Jun 14, 2009
I've gone through about 16 hours and two packs of cigarettes trying to figure this out. First a little background. I was using 6.0 up until 2004 when I went to prison. I'm out now, and trying to relearn the trade, using VS 2005. I'm currently porting some 6.0 code from another project, SpyCast Webcam Studio, into VB 8.0. It's disheartening, to say the least. None of the old built-in subs/functions work anymore, so I have to scour the forums to relearn each and every function.The section I'm doing now takes a snapshot from the webcam (Video API --> PictureBox --> Save as Jpeg), then upens the file to upload it to the server via HTTP POST. I've been using this code in SpyCast for years with no trouble, but I spent many hours trying to piece together the right code to open the binary file to read its contents. I pieced together two methods I found around the forums, one using FileStream() though the code I found wasn't for binary files, even though it said it was, so that code doesn't really work. Method two uses Microsoft.VisualBasic.FileOpen() and works better.
Here's the kicker. By the time I run through the rest of the rigamarole of uploading the file, by the time I read it on the webserver, it's *slightly* corrupted. It's a valid Jpeg, no errors, but the picture looks like when I use to watch the Playboy Channel when I was a kid scrambled with weird colors and whatnot. [code] Each "chunk" is basically one "line" of the file. It looks like a single LineInput() return is the text between two carriage returns. Am I correct? I tested this with a flat text file, and it looks true. However, That one input line returns the text or data with the carriage returns *stripped*! ***?!? =( Fine, I have no problem adding my own vbCrLf to each LineInput(), if I were opening text. but this's binary. A character could be Chr(10) or Chr(13), both of which are removed from the original file contents.So I could very well need to use something other than LineInput(), but I haven't found any other examples on the web using this method.
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Mar 21, 2010
I need to implement a routine to read a plain text file, BUT that file has a predefined format.The file format is as follows:
Quote:
<FILE_PROPERTIES> 'The "< >" also appears
Propertie1="String" 'It's possible to have spaces after or before the "="
Propertie2="String"
Propertie3="String"
PropertieN="String"
[code]....
Is there any Windows API Routine to read something like that?Or could you point me an URL where something is implemented?I don't want a procedure to read the file line by line and comparing them with Line Input because blank spaces, empty lines and comments starting with " // " may appear too, and I don't want to take them into account, but also I need to save changes to the file, but only to the modified section, without having to read the whole file, and re-write it completely.
Binary access can't work, because I don't know what's the size of each "section", since the number of elements into it can change.
I need something like the "ReadINI" Windows API Procedure, but allowing me to read the "[XXX]" sections headers, and also the "<XXX>" file title header.
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Aug 12, 2010
Before I begin I would like to mention that I am not a noob in VB, it's just I've never had to do anything this complex before. Basically what I want is to have a program that you can load a txt file in, have it copy key words, and paste it in a textbox so I can use it later on. So in this text file, there is a bunch of info, but I am only needing a certain part. Here is an example of a text file (actually a .dat file, but is easily read):
[Code]...
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Apr 26, 2009
I Am making a Soccer League tabel with player names.With All the Names:The first Digit is either T(for Team) or G(for Goal).
[Code]...
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Jun 6, 2009
I simply want to do this :
1. Creating a textbox1.text
2. Creating a button.
3. Coding the button so whatever is written in textbox1.text will be saved in a .ini file.
Quote: My.Computer.FileSystem.WriteAllText("c: ext.ini", TextBox1.Text, False)
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May 29, 2009
I want to read the meta data from a movie file and place the result in to a textbox.I've googled it and found no good samples for vb.net =( The data I'm interested in are the bitrate and the resolution and the extensions I'm interested in are .wmv, .avi and .flv the extension isn't known when the program loads because the movie is going to be inputted by the user..
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Feb 5, 2009
I have a coma seperated text file with loads of records. Usually when we read a text file we start from the first line and go towards the last. I know that there will be x comas per record.
But I want to start reading from the last line and then towards the top. This enables me to stop before I reach the top (depending on the data).
What would be the fastest way to read a text file in VB.NET. I am using VS2008. Basically I want to read from last line and stop when I want. I may not need to read the entire file.
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Aug 28, 2010
how to read bytes from a file... but is it possible to read each individual bit, one at a time?
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Jan 31, 2009
I need to read the following file in vb .net:"C:WindowsSoftwareDistributionDataStoreDataStore.edb". It contains info about installed software updates. I've taken a look at the file by opening it with notepad. This isn't a plain-text file obviously, but I can find and see the text I want easily with Notepad, and I want to extract this text by using VB .NET.
The problem is, i've tried to read the file by using an io.streamreader, but I can't get the same results as in notepad. I've tried to change encoding but that doesn't work. I mean in Notepad, I can read some text easily: "A s e c u r i t y i s s u e h a s b e e n i d e n t i f i e d" [...], but the only thing I get with the streamreader is some bunch of ugly characters, and the text I saw with Notepad isn't there.
Do I have to read the file in binary or what? HOW NOTEPAD DOES IT? HOW DO I READ THIS FILE LIKE NOTEPAD DOES?I absolutely need to extract some updates info that aren't in either the registry or WMI/QFE.
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Mar 23, 2010
how do i write to the windows registry and read from the registry?i'm using windows 7 - 64 bits, and visual studio 2008.
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Dec 22, 2010
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?
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Nov 12, 2009
I can write to a registry key in hkey_current_users using this code:
Code:
Dim MyRegKey As Microsoft.Win32.RegistryKey
Dim MyReg As Microsoft.Win32.RegistryKey = Microsoft.Win32.RegistryKey.OpenRemoteBaseKey(Microsoft.Win32.RegistryHive.CurrentUser, "Remote Computer Name")
[code]....
It changes the vaule for this key. But the problem is, that since several people log onto this machine using different accounts. I need to be able to specify which account under the current user gets this registry change.
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Nov 8, 2011
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].....
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May 4, 2012
I am attempting to write a Dictionary Collection to a file.The Collection is structured like so:
GlobalCollection (Collection of TestCollection)
(0)
[KEY]
[code].....
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Sep 17, 2008
I'm trying to write out a date like this 09-16-2008 so I can put the date in the name of a directory. Here is my code:
Code:
Dim aDate As Date
aDate = Date.Today
aDate.ToString("MM dd yyyy")
[Code].....
I can't seem to get the leading 0 in front of the month if it's a single digit. I can't get rid of the time, and I can't get the dashes.
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Jun 15, 2011
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
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Nov 5, 2010
I 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.
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Jan 24, 2011
i want to read all the keys from resource file into a collection, how can i do this?
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May 12, 2009
i have 5 textboxes in a form. I have a streamwriter that writes all of their text to on text file like this:
Code:
Dim xfile As String = Application.StartupPath & "/Set.txt"
If File.Exists(xfile) = True Then
Dim writex As StreamWriter = New StreamWriter(xfile)
[code]....
I was wondering how to get the text under the each number and place it in the corresponding textbox.
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Feb 15, 2012
I have several programs that must write to HKLM in XP and Windows 7/64 Pro.
The programs work in VB6 but not in VB.Net 2008 on target machines. It does works on our development machine.
Same exact windows. [code]...
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Nov 15, 2009
How do I read, write and delete a registry using VB 2005/2008?
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Jun 10, 2011
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.
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Apr 19, 2011
I have an application which reads and writes to the registry. If the programs starts, it looks if the registry keys exists. If not it create the keys. All this is working fine on a Windows XP machine.
Now we moved to Windows 7 and it is not possible to write to the keys. First I need to go to the registry and add permissions. Then it works !
Is it possible to change the permissions in the .Net code and make it able to write to the registry without changing permissions through regedit ?
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Jan 21, 2012
I have several programs that must write to HKLM in XP and Windows 7/64 Pro.The programs work in VB6 but not in VB.Net 2008 on target machines. It does works on our development machine. Same exact windows. User is an Administrator.NOT using Run as.
Both programs are using the same function
Declare Function RegCreateKey Lib "advapi32.dll" Alias "RegCreateKeyA" _
(ByVal lngRootKey As Long, ByVal lpSubKey As String, phkResult As Long)
[code]....
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