File I/O And Registry :: Writing Data To File?

Jun 6, 2011

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]....

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File I/O And Registry :: Analyzing Contents And Writing Manipulated Data

Jul 25, 2009

I am basically reading a text file with info like this:
"S1($=""ChW System Pressure"",V=134.00,%=""Pa""),S2($=""UPS_Batt Rm 1to4 Circ A Flow "",V=9.17,%=""DegC""),S3($=""UPS_Battery Rm Sec ChW Rtn"",V=-38.38,%=""DegC""),S4($=""Buffer Vessel BV-02 High Temp"",V=9.08,%=""DegC""),...

And I'm trying to write a program that read the data, filters the sections so that per line it does the bit before the brackets i.e. "S1" then a comma then the sections inside the brackets as comma separated values removing the double quotes and symbols I don't want etc. Basically dividing the separate S*'s onto different lines and separating the values with comma's. There are also other points which are a different letter than "'S" and the same to do with them to.

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File I/O And Registry :: Writing (Default) And Dword(binary) Entries To Registry

Jan 31, 2009

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

[Code]...

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File I/O And Registry :: Reading/Writing Objects To File?

Jul 5, 2009

So 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].....

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File I/O And Registry :: Text File Reading And Writing?

Jul 17, 2010

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?

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File I/O And Registry :: Writing An Array To A File?

Jul 6, 2010

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

[Code]...

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File I/O And Registry :: Writing Array To A File?

May 31, 2011

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)

[Code].....

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File I/O And Registry :: Writing To The Registry?

Oct 27, 2010

I just bet the answer to this question already exists, however I saw no search mechanism under the forum. Anyhow, I would like to change registry data, and this code is asking for an instance to the object.

Dim RegKey As RegistryKey = My.Computer.Registry.LocalMachine.OpenSubKey("HKEY_CURRENT_USERSoftwa reAnyDWGSoftwareDWGtoPDFProSettings", True)
RegKey.SetValue("OutputPDFFileOpt", 1)

Finally, I want to apply this setting to the program on four different computers (local, and three others on the network).

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File I/O And Registry :: Writing In A New Line?

Oct 10, 2008

I am having problems with opening a file and writing in a new line some data.Instead of writing the data in a new line,it replaces the data in the first line of the file with the new data.The function is this:

Code:
Private Sub cmdAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdAdd.Click
ListBox1.Items.Add(txtServerName.Text)

[Code]....

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File I/O And Registry :: Writing Structures To Disk

Oct 21, 2010

My application uses structures that contain strings and arrays that I want to write to disk. I understand that I can create the fixed length data types in the structures by using "ReDim" and "String$", but my question is: Does VB reallocate the storage for the structure which includes these redimensioned members in-line (which would be necessary in order to write the contents to disk), or does it allocate heap and merely store a pointer in the structure?If only a pointer is provided, is there a straightforward workaround to allow me to create fixed length data types in a structure that could be written to a disk file?Or, Is there an I/O method that will handle the situation by recreating a contiguous buffer containing the structure before writing it to disk?

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File I/O And Registry :: Writing Text To A "unknown" File?

Mar 6, 2009

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

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File I/O And Registry :: Writing Generic FileSave Routine For Collections

Mar 12, 2009

I want to write a generic file saving routine where the routine is passed data in the form of a collection and it sets a containsStructure flag. I wanted to be able to save the data from the collection, but if it is a collection of structures I want to be able to extract the data from the structure to write to the file.

The only trouble is, that I cannot do something like:
For Each s As dataStructure In data
Next
Since the compiler complains that dataStructure is not defined. Is there a way to code around this?

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File I/O And Registry :: Move Data From One Data File To The Next, Using A Text File?

Apr 25, 2010

I'm Writing a Problem that will allow users to move data from one Data file to the next, using a Text file. My problem is that i so far i 3 test users.

No matter what test user is logged on it seems to be Reading the first user info no matter which one is on.

How do i get it to Only Read the User Info and show it up on text file that is Currently logged on.

Code:
Imports System.IO
Public Class TestForm6
Inherits System.Windows.Forms.Form

[Code].....

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File I/O And Registry :: Code A Delete Button For A Browsing Program Based On Data From A Txt File?

Dec 3, 2010

I am trying to code a delete button for a browsing program based on data from a txt file. I have coded the buttons to sort(ascending and descending), append to the text file, search the text file, but I can not seem to get the delete function working. I am using VB 2010, this is what I have so far:

Code:
Dim deleline As String
Dim line As String
Dim isFound As Boolean = False
sr4 = IO.File.OpenText("Students.txt")

[code]....

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File I/O And Registry :: Create Some Data Inside An App And Send It To Another App As A File?

Feb 20, 2010

This is what I am trying to do. I need to create some data inside my app and send it to another app as a file. But this 'file' should never be written to the hard drive. It will only ever exist in RAM.

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File I/O And Registry :: Retrieving Data From Text File Using Streamreader?

Feb 15, 2012

I am making a simple application that will be able to store competition data into a text file that I have given a custom extension to on saving. Here is an example of the format that i have saved the data in.

Code:
[Comp_Name]Test Competition[Comp_Name]
[Location]Silverwood Lurgan[Location]
[Type]Teams[Type]

[Code]....

When i open the file, i want to redisplay the data in separate text boxes. Later on in the project i want to be able to search within the file for headings for example;

if "[Heat1]" is present then get all text between [Heat1] and [Heat1]

i am currently able to use the streamreader and open file dialog to retrieve the entire string of text fromthe however i am not sure how to go about getting the text between the headings I have used.

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File I/O And Registry :: VB 2010 Formatting Data In Text File?

May 4, 2012

1 List all of the data from Teams.txt in a Listbox. Include suitable headings.

2 List all of the data from Results.txt in the Listbox (use the same Listbox as in 1 above).Include suitable headings. Note that you cannot assume that the file contains onlyresults for the first 3 weeks of the season. Your program should be able to process a results file with more or fewer results.

3 List all of the data from Results.txt in the Listbox. However, in this case the actual team names should be output (your program will need to get this data from Teams.txt. The data should be formatted so that it is aligned correctly. Include suitable headings.

The output might look as follows:

Home Team Away Team Home Team Goals Away Team Goals
Bunbury Braves Nedlands Nodders 5 2

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File I/O And Registry :: Export Data To Text File?

Mar 17, 2009

I have a variable (double) that is constantly update in real time with data from an analog input. I would like to write this data as it comes in to a txt file. When I stop my acquisition of data from my analog input, I should have a txt file with all that data stored on my computer wherever I want it. The way I'd like that txt file to be laid out is like so:

Test Title: "This info comes from a string variable"
Operator Name: "This info comes from another string variable"
Test Date: "This info comes from yet another string variable"

[code].....

And so forth. As you can see I would also like to write the time for each data. This depends on my Timer interval which the user can set. The default is 50ms. So by default, y1 y2 y3 would be 0, 50, 100. How would I generate such a text file?

PS: I have five variables (X, Y, strTitle, strName, strDate)

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File I/O And Registry :: Importing Specific Data From An XML File

Oct 19, 2009

I wish to import data (into a text box) from specified tags within an XML file.[code]Instead of loading the whole file into a text box I would like it to load data within <ABC></ABC> tags.The amount of <ABC></ABC> tags varies for each XML file. As does their placement (which line they are on).

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File I/O And Registry :: Save Data Of Objects To File?

Oct 4, 2008

I have about 4000 objects of a class, each object with 20 members/variables, integers and strings, total about 80000.

I would like to save these to a file, and read them back into objects when the program starts up.

How would I do this in order to keep track of each variable? I was planning to have each line in the file representing the variables of 1 object. Hence 4000 lines. But basically I'm just looking for the easiest way to save and retrieve this data. Should I first convert the objects to an array of strings?

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File I/O And Registry :: Type Of Data File?

Apr 9, 2010

I'm trying to read in a file. I'm not even sure what kind of data the file contains. Is it binary, unicode, etc? Or maybe it is encryted? I doubt it is encrypted, but I really have no clue. I am pretty sure it contains geometric/drawing data. It shows most characters as boxes.I've attached a picture of the contents when I open it in wordpad. Does anyone have a clue what type this is? and how to get it into a readable format using vb.net?

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File I/O And Registry :: Get Data From A Text File To Plot A Polar Graph Of Wind Direction Vs Wind Speed

Mar 22, 2010

I am new to vb and I am required to plot a graph in vb. I need to get data from a text file to plot a polar graph of Wind Direction vs Wind Speed. But opening the file from a text file is in a string format, and when i tried to convert to a double, it gives the error:

[Code]...

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Writing Data To A New XML File?

Jun 13, 2011

I am working on a program for work and I am stuck on trying to make a new XML file from VB.NET 2010. I have the old code which was done in C# and it works but even using a C# to VB converter didn't help. I will paste in both the C# and what I have in VB

private void webBrowser1_Navigating(object sender,
WebBrowserNavigatingEventArgs e)
{

[Code]....

It is supposed to not only create the file but launch a program called PowerScribe and find the case in the Field 6 section.

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Writing & Reading A Data File

Jan 30, 2011

I am trying to write the TOURN structure and then read the TOURN structure back in.. the file gets created on my desktop and the program does not have any syntax errors, but when I READ the file none of the Data gets retrieved. So I am not sure if the DATA was actually saved or it is just not being retrieved?? This is what I have coded so far...

[Code]...

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File I/O And Registry :: Binary File Primer - Read The Nth Record Without Reading The Whole File?

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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Reading And Writing Data To A Text File?

Sep 28, 2009

The 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.

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Writing Data To A Text File In A Format?

Feb 7, 2012

Im trying to get some particular content from a site and place it in text file. i have used a listbox for loop of urls i want to process and another to see output of data. now i want all data in text file each item seperated by "~" sysmbol.

Exmaple Link i used in my.txt file: [URL]

Data expected in text file:

Abbeville High School Basketball Stats ~ Team: Varsity 11-12 ~ Colors: Maroon, Gray, White ....

Imports System.IO.StreamReader
Imports System.Text.RegularExpressions
Imports System.IO

[Code].....

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Writing Data To Access Database File?

Jul 19, 2010

I use Visual Basic in Access, and I have no problem writing data directly to a cell in a database table. But I can not figure out how to write the code for Visual Basic 2008. For example I would
use Me![cust_Cost] = 20 to input 20 in the database table.
I have purchased two different Books on Visual Basic 2008 and not one of them show how to input data manually.

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Writing Data To An Existing Excel File

Mar 16, 2010

I'm fairly new to coding in Visual Basic, and I'm working on a project where I have to allow users to write data to an existing Excel worksheet (by entering the data into a form created in Visual Basic.NET). I've created a form that allows users to enter data such as the following:

[Code]...

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Writing Data To An Existing Excel File?

Mar 15, 2010

I'm working on a project where I have to allow users to write data to an existing Excel worksheet (by entering the data into a form created in Visual Basic.NET). I've created a form that allows users to enter data such as the following:

Name (First, Last)
Mailing Address
Email Address
Gender
Age

...and so on. I've programmed the data to be sent to the Excel file upon clicking on the Submit button in the form itself. I've also created the Excel file and placed it on my C: drive, but the problem I'm having is trying to send the data from the VB form to the Excel file itself. Can someone please show me some sample code or point me in the right direction as to how to get the submitted information from the form to save into the Excel file, please?

I'm trying to get the information to show up in rows and columns in Excel like the following below (the dashes are just to show that the information should be in rows and columns):

Name--------------------------Mailing Address-------Email Address-------Gender-------Age
John Doe---------------------2300 Jackson Street-------- xxx@xxxx.com-------Male---------17

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