Making A .net App To Read / Write SQL Db?
Jul 30, 2009recommend some tutorials that show very simple examples on how one can read / rwite to an SQL db?
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Making A Utility That Will Read Through The Files In A Listbox?
Apr 12, 2009I am making a utility that will read through the files in a listbox.I already have it where it can read the files but you have to have the file selected in the listbox. Im wanting it to do it to all listbox items instead of just the selected one. This is what I was using:
Dim files = ListBox1.SelectedItem.ToString
Making My Own Events - Read In Information From A Magnetic Stripe Card
Jan 13, 2009First off, what I'm doing here is trying to read in information from a magnetic stripe card, parse it, validate certain parts and go from there. I'm working on two classes... the first is CardClass and that represents the card itself (well, the data obtained from the card). The class is CardParsingClass. This holds all the card parsing rules.
At one point in the process, I will create an instance of the CardClass. That instance gets passed into the CardParsingClass.ValidateData function:
CODE:
This function steps through each of the card parsing rules and applies the rule to cardCurrent to see if it passes (i.e., is valid).
And here we come to the meat of it.... what I'd like to do is define an event called FailedCardReadEvent. Whenever I raise the FailedCardRead event I could write to the log that it failed, modify variables in the CardClass (particularly the state of the card read variable), etc. So, the way I'm looking to use this would be something like this:
CODE:
So as shown above I'm thinking I should code a FailedCardReadEvent in the CardClass. But I don't know how to do that.
I also don't see how this is different than just calling a subroutine. If I have to manually raise the FailedCardReadEvent isn't that the same as calling a subroutine?
I know I'm missing something but I'm just not getting it. I've spent some time googling this morning and read a few things but I'm just not understanding how it all works.
How To Read And Write Xml
May 7, 2012I have a folder called movies. In this folder is a collection of different movies each in their own folder with their own xml file called movie.xml.I would like to extract lets say the localtitle and aspectratio from each movie xml and send to Excel. What code would I need to achieve this?So far I have the attached code which reads only one file and it is directly from the xml outside of a folder.
View 36 RepliesRead MP3 - Write Wav?
Jun 13, 2009Is there anybody out here in the VB, C# 2008 world that can direct me in the right direction? I do not want anything that has todo with c/C++or Direct Draw. When converting, there is no equal for SizeOf, and a few other things. I am using Lame 3.98.2.exe in my app along with LameShell that works fine for resampling, but , not for decoding an mp3 to wav or encoding a wav to mp3. You can find the LameShell project at [URL] . LameShell is a wrapper for the Lame.exe file. Here is the complete LameShell class file along with my app button clicks for the following,
[Code]...
VS 02/03 Xml Read & Write?
Dec 21, 2010I am trying to extend an application to to write the details from textboxes on a invoice form to an xml file.I have created 3 methods for my invoice class which will open the invoice xml document, write to it, and close it.The open Invoice method creates and invoice.xml file and writes a start tag named invoices.
The WriteInvoice method writes an invoice element for the invoice with attribute named customerName and three child elements named ordertotal, discounTotal and Invoice total. These values are taken from the textboxes form the form.
The CloseInvoice writes the end tag for the root element(invoices) and closes the file.
I have wriiten code for these methods but can only get the open invoice method to work.
My code for the 3 methods is shown below:
Public Sub OpenInvoices()
Dim sInvPath As String = "C:MurachBeginning VB.NETExercise startsVB.NETChapter 14InvoiceInvoices.xml"
Dim InvoiceWriter As New XmlTextWriter(sInvPath, Nothing)
InvoiceWriter.Formatting = Formatting.Indented 'Set formatting of XML file
[Code]...
Can't Read / Write To Registry
Feb 15, 2012I 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]...
How To Communicate With USB (Read / Write)
Mar 15, 2010How to communicate with a USB port using VB.NET?
View 1 RepliesHow To Read & Write CSV Files Using WPF
Sep 21, 2009i'm using sharpdevelop to program WPF application(I'm newbie to WPF i've knowledge of VB only and no C#, is it necessary to learn C# to know WPF ?).
and i want to read CSV file first. after that i want to modify and save file. any suggestions and pointers for this ?
How To Read And Write To Registry Using .NET?
Nov 15, 2009How do I read, write and delete a registry using VB 2005/2008?
View 1 RepliesRead / Write To File
Feb 27, 2010i'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]....
Read / Write XML Files?
Nov 9, 2010I have the following code for reading XML files.[code]...
View 8 RepliesRead And Write Files?
Jan 27, 2010reading and writing files. Let's say I have a text file with multiple lines that I want to be read into my visual basic program. The first line is displayed in textboxA while the rest of the lines are displayed in textboxB. How do I accomplish this? Am I able to use the peek method for textboxB but somehow tell it to skip the first line? Now textboxB is obviously a multiline textbox and I want the user to be able to type something into another textbox (textboxC), press a button, and it will be displayed in textboxA. How do I make the text in textboxC get displayed on the first line of textboxA and move all the other lines down the list?
View 2 RepliesRead And Write From The Textfile To .net?
May 5, 2009Imports System.ComponentModel
Imports System.Drawing
Imports System.Windows.Forms
Imports System.IO
[code]....
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.
Read And Write In INI File?
Dec 29, 2010i 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".
Read And Write JPG Tags Using VB6?
Mar 22, 2009How can I read and write JPG tags using VB6. The ones that I want to read& write are
Title
Subject
Keywords &
Comments.
Read And Write Record?
Mar 11, 2010I'm using begintransaction to update multi-tables. I need to update one of the table while retrieving some records from that same table before commit. But it seem the table become locked after I inserted a record, and timeout at last.
View 3 RepliesRead And Write To A File?
Nov 7, 2009I'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 RepliesRead And Write To Database Using Vb?
Mar 31, 2009i need to read and write to a database (access 07) using visual studio coding in vb.
View 3 RepliesRead And Write To File?
May 25, 2011I 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] .....
Read/write Some Data ?
Feb 13, 2012My first question has to do with the opening lines needed in a VB program in order to connect to Excel 2007 and read/write some data from/to it. I know the process only slightly and reading and writing to the cells is not my real concern for the moment. What I need to become familliar with are the lines like this:
CODE:
This is just one of the examples I have read through and to be honest I only follow this slightly. The trouble was that with each new article I read, people did this differently, not the variables on the left mind you, just that some left out lines, which I can see could be done based on circumstances. Still others said the Imports line was not needed....etc...and other loaded up at least 3 or four more Imports lines insisting all were needed.
I'm looking for some straight-forward advice on what is the minimum needed to access an existing Excel spreadhseet and to just read some of it's cells to variables in the code and then writed some data back to certain cells within the spreadsheet and then save and close it.
Also, please note that I am using VB 2010 Express. Why, because I'm a broke developer who spent most of last year out of work. I have a new contract assignment which is so far going well but will go even better if I can master this technique with VB.NET, not VBA. And all the docs I've read said that even though VB 2010 Express is a watered down version of VS, I should be able to do medium level tasks such as this with it.
Read/Write To Other Applications Using WPF-VB
Dec 9, 2009Trying to emulate a typing application that when typing data in a WPF form, the info gets transferred to another application, such as notepad, word, etc. My first attempt involved using the .Sendkeys method but it doesn't seem to be repeatable 100% of the time. I initially had a button that when pressed would transfer data from a WPF app field to an open notepad app. Again, if I pressed it several times in a row, it would be hit or miss. It's like it hangs up and then after enough time, I try again and it works. I really need it to be 100%. Is there a fix for this method or should I take on a different approach? It would be ideal if I could go from notepad, word, etc. back to the WPF form as well, but I thought I would get one way working first.
View 1 RepliesRead/Write Web File?
May 19, 2010I 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]
SyncLock On Write - Read - Or Both?
Jan 7, 2011Suppose I have a byte array, Private Data as Byte(). This array is private within a class. The class provides public functions for reading and writing to Data. This class can be accessed by multiple threads, so I want to avoid a situation where reading from it and writing from it don't happen at the same time.
For now, I am using SyncLock to avoid issues. Can I put SyncLock Data in just the write functions, or does it need to be in the read functions? Or, both? I don't have a specific code example in mind. I am just curious if there is any benefit to locking for both read and write functions if the writing functions' SyncLock will make writing have exclusive access to it in the first place.
VS 2008 : Can Read From The Db But Can't Write
Apr 11, 2009i had an old oledb connector from a .net 2003 application i tried to follow the same steps i used for that but it wont allow me to edit the access database.i was trying to avoid using sql strings because my database is rather large and the primary use of this db is for data entrys.
View 3 RepliesWrite / Read 2 Or More Files?
Oct 15, 2009in the following thread, [URL]..my first reply, writes and reads two files..
my question is, is that code used properly for writing/reading those 2 files?
for some odd reason, i feel like i am over using the writers/readers.is there a way to only use one writer/reader, not 2, as my code in that thread does, to write/read 2 or more files?
.net - Isolating Read And Write In Multithreaded
Mar 8, 2010In a multithreaded application. I have a bunch of function that loop through a collection to read the information. I also have a bunch of function that modifies that same collection.
I'm looking for a way to isolate all the read and the write together. I don't want a write to be done while a read is in progress. I was thinking of using SyncLock on the collection object but this will block multiple read trying to work in parallel.
.net - Read This DataTable So Can Write It To A CSV File?
Jan 3, 2012I'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]....
Backup Tape Read And Write/
Oct 26, 2009I'm here to ask about read and write to backup tape drives how i can send data or receive it from backup drives
View 4 RepliesCan Not Open / Read / Write Any Files
Aug 4, 2009I have an application that works in both 32 and 64 bit, except that on the 64 bit system it can not open/ read/write any files.I know the 64bit file system is different, from what I heard. How can I make up for the changes? I have no access to a 64bit system, but I want to make my program able to find and open the files.
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