I am using Visual Basic 2010 Express and attempting to get information on how to Open, Close, Read and Write a disk file in Windows using VB. I have attempted to use help on the home page of Visual Basic 2010 Express with no results. It does not give me any instruction or sample.
View 3 RepliesThis question only applies to files of line-terminated/text strings.[code]I suspect that ultimately, I will generate the myfiles version of the HD file as I write it to disk,but at this point in my VB.net 'skills', until I can prove what I've written by reading it back and having control of it in my program, I can't assume anything about the data/format/file that I have written.
View 12 RepliesI am using BinaryWriter class to write a binary file to disk. When I invoke the Write method, passing an unsigned short value, it writes it in little-endian format. For example:
bw.Write(0xA000);
writes the value in the binary file as 0x00 0xA0. Is there a way to make BInaryWriter use Big Endian? If not, is it possible to create a new class, inheriting BinaryWriter and overload the Write function to make it write big endian?
The following gives me an error when I try to open an Excel file if the value of lblFileName is different than the file on disk by differences of upper or lowercase letters.
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I 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.
View 1 RepliesHow to open/Read/Write in USB Port
View 3 RepliesI am trying to use the following stmt in VB and I am getting an error: Open (objFiles(lngLoop)) For Binary Lock Read Write As #hndZip_File On the "Open" word I am getting "Open is not declared. File I/O functionality is available in the Microsoft Visual Basic namespace." On the "For Binary Lock Read Write As #hndZip_File" I am getting "End of statement expected" I originally thought I had to add "Imports Microsoft.VisualBasic.FileIO" but this did not do anything.
View 2 RepliesI am trying to write text to a file in this path "C:\Test\test.txt" and when I want to save image filenames to this path I need to check if the file is opened and if it is opened I need to close the ".txt" file and write the text to the text file.[code]...
View 5 RepliesAny code I could get that would Open + Close a .bat or .cmd file? Not ALL .bat / .cmd files that are open, but just ONE (runserver.bat / runserver.cmd).
View 1 RepliesI have a number of word documents I am converting. Everything is going great until I get a file that is read only. In this case I get a Save As prompt.
Is there any way to open the file in read/write format? I should have admin privileges so access isn't an issue.
I'm using VB.net to open the files. More specifically
doc = word.Documents.Open(path, Type.Missing, False, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing)
In this project I want to read text from the text file.. after that want to update the text file.. if i just run the code manually, the code run well.. but if I want use timer to keep the code run automatically there show problem.
here my code
Imports System.IO
Public Class Form1
Dim skrng As Date = Date.Now()
[code]....
I am having issues with people not closing an important file in excel.I have a new vb.net based application that i want to close the excel file when i prompt it to. The application checks for specific named files in a hidden folder on a timer event, (that all works fine) how do i tell it to close a file that is already open.All threads i have read say things like this:
Dim XLApp As New Application
Dim WkBook As Workbook = XLApp.Workbooks.Open("C:Book1.xls")
Dim Sheet As Worksheet = CType(WkBook.Sheets(1), Worksheet)
[code]....
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?
I am trying to save the text file in this path:"C:Test est.txt" and when the file is already opened I need to check whether the file is opened and I need to close it before writing it to the file.[code]...
View 3 Repliesi have this code
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I want If A.Text = (detline(0)) the program show a msgbox (OK this) and after the msgbox to cl;ose the file and exit from soubroutine When the pointer reach the FileClose(ReadFile) i receive in Catch When an Err.Number 13 WHY??
How do I open a bmp file in VB.NET add a line then close the file?
View 12 RepliesWhat i am trying to do is open a save file dialog and write to a .txt firl the contents of my listview. so far:
[Code]...
i have this, but i'm not to sure how to write to the .txt file i know i need to use a for each to loop the contents of the list view
In a program I'm working on, I want a "Loading..." dialog to close when it can't log in to a site using the username and password provided by the user. Basically, I have the code set up right because the function it is supposed to carry out when that occurs does work, but for some reason it ends up in some really weird stuff happening. In the Loading form, I have it set to do "Form1.Show()" and then "Me.Close()", assuming it would simply show the login form and then close the Loading form. However, when this happens, the Loading form closes, and then for only an instant Form1 shows, and then the Loading form shows and Form1 closes. This happens forever until I stop the debugging, and I can't seem to figure out why. Am I using the wrong method? What exactly does Me.Close() do anyways? All I want to do is close the form and open another
View 5 RepliesI am using about 5 different filesystemwatcher routines total. I am using the following
filewatch.NotifyFilter = NotifyFilters.CreationTime Or NotifyFilters.LastWrite
AddHandler filewatch.Created, AddressOf addfile
AddHandler filewatch.Changed, AddressOf addfile
filewatch.EnableRaisingEvents = True
However, there is one problem with it... whenever I open a file and change stuff, then close it without saving the changes, the events still fire. I am opening excel workbooks in code, then use xlsWB.Close(SaveChanges:=False) to close them, and the event still fires, where the file isn't really changed so it should not fire.
I'm currently creating an SSIS job that will pull picture data from a SQL database and write each picture to a file. We have an ID system that stores all images taken of staff directly to database fields, but we're going to be moving to a new system that stores all of the images as files in paths by User ID.
I have already created my main data flow that gets all of the users and the proper path, but I'm having trouble writing the script component that will create the images. I have the image data as a string, but how do I get it to go out to a file at the proper path?
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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.
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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 am trying to write disk errors to the system event logs.I have a list of errors reported to the event logs if disk issues occur.So i just want to write dummie errors to the logs so I can do testing.I am able to write to the logs but the description comes up as follows:
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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?
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...]