I 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
I'm making a backup utility, and I need to know how to compress files. Is there a VB built-in utility for this? Also, if possible, can you tell me how to compress things to the maximum?
View 2 RepliesIm trying to create an incremental backup utility on a web form using vb.net for code behind.
So far i can copy files from directories including sub directories and that part works fine, my main problem is copying only the most recent / modified files to the backup folder, currently it is moving all the files each time.
Below is my code so far.
CODE:
Background: I have read a bunch of techniques to handle compression. I don't think SmartZipLib handles 7z. System.OS.compression does not seem to handle rar or 7z. I am trying to find one approach for all.The tools within Windows XP seem to handle them all from inside the file manager (at least on my computer).Question: how can I decompress all these files using the windows utility? I am guessing it is some sort of Shell command. Alternatively, is there another option?
View 2 RepliesUsing fs As New FileStream("C: estsomefilename.ext", FileMode.Open)Using rdr As New BinaryReader(fs) fs.Seek(225, SeekOrigin.Begin)Dim b() As Byte = rdr.ReadBytes(32)Dim s As String = Encoding.UTF8.GetString(b)
End Using
End Using
End Sub
I'm trying to create a zip file though vb.net and move files into it using the built in windows zip utlity. so far I can create the zip, but not able to move any files to it.Here's my code:
Dim emptyZip As Byte() = {80, 75, 5, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}'Dim oApp As Object
File.WriteAllBytes("c:x.zip", emptyZip)
'The following code I found somewhere but doesn't work'oApp = CreateObject("Shell.Application")'oApp.Namespace("c:x.zip").CopyHere("c:Book1.xls")
my knowledge of VB.net is limited and i'm really trying hard to figure this problem out...
what i did was create a list box and populate it with a directory ("C:Documents and Settingsuserfolder1")...
once the listbox displays the files from the directory, i want to select a certain file and that file will be opened up in a rich text box.What i found to display the directory in a listbox is:
Dim directory As New IO.DirectoryInfo("C:Documents and SettingsjtanDesktopRECV")
Dim diar1 As IO.FileInfo() = directory.GetFiles()
Dim dra As IO.FileInfo
Dim files As String
[Code]...
I am trying to delete rows of an .sdf file using the Database Explorer utility of Visual Basic. When doing so, I get the following error message:No rows were deleted.
A problem occurred attempting to delete row 1.
Error Source: Microsoft.VisualStudio.DataTools. Error Message: The row value(s) updated or deleted either do not make the row unique or they alter multiple rows(48 rows). Correct the errors and attempt to delete the row again or press ESC to cancel the change(s). It is correct that the data in the rows are not unique (and not supposed to be; there is no "error" to correct), but why should this prevent deleting them?
My knowledge of VB.net is limited (only have been reading from the book)
so what i need to do for my project is to populate a listbox with files from a certain directory (C:folder)
then once it's populated, i can select an item and it will open up in a rich text box.
This is what i have so far for the active directory > list box:
Dim di As New IO.DirectoryInfo("C:Documents and SettingsuserDesktopfolder")
Dim diar1 As IO.FileInfo() = di.GetFiles()
Dim dra As IO.FileInfo
[Code]....
I am having problems with copying from one listbox to another and keeping the paths of the files in the listbox's. At the moment i have two listbox's, listbox1 shows the list of files without the directory paths showing. Listbox2 is used to add items from listbox1 which work ok but what i need is to be able to preserve the directory paths to each file. how to do this and have searched high and low for a solution without any luck.
I have worked out one way of doing it but i think there is a better way of doing it as the reverse does not seem to work. So basicly i want listbox1 to list the files without the paths and pass it on to listbox2 so that the files can be copied to temp directory as they are being add to listbox2.
Below is my
[CODE]...................
Routine to add items from listbox1 to listbox2: I have created another listbox3 (which is in bold), which is hidded under listbox1 and holds all the paths to the files and is use to copy the files from there original directory to a new directory.
[CODE]...................
Routine to add items back to listbox1 and remove them from listbox2. I have created another listbox4 which is hidden under listbox2 which i was trying add the paths from listbox3.
[CODE]...................
recommend some tutorials that show very simple examples on how one can read / rwite to an SQL db?
View 3 RepliesIm trying to make a favorites listbox. I've never messed with arrays that much and having a bit of trouble figuring this out. I dont want to start making bad habbits as well this early in my learning process. Here is what I have but its not working.
'Add Link Button in different form
Private Sub btn_Bookmark_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_Bookmark.Click
Dim Bookmark As String = tb_Address.Text
Storage.FavoriteLink(Bookmark)
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCompute.Click
Dim dblValue, dblTax As Double
[code]......
I got a listbox (ListBox1), and I want a search function for it, BUT;When someone search for a string in the textbox, the "Items" in the ListBox will only show the result, nothing else.
So if listbox normally says:
"TV"
"RADIO"
[code].....
I want to develop an application which can Write, Save, Read text files(or html files) What I want the application to do is. When I open my application I can write stuffs and then it will save it to my hosting/server. Then, the application will read the text which I already save.. So far, I can only make the application read it by using WebBrowser control and navigating it to a specified URL. Example: [URL](or message.txt) Which I modified from the website not from the application. I want to modify the text or html files from my application.
View 6 RepliesI want to read data (read only) from excel files
I use this connection string
Con_BarCode = New ADODB.Connection
With Con_BarCode
.ConnectionString = "Driver={Microsoft Excel Driver (*.xls, *.xlsx, *.xlsm,
[Code].....
Ok I'm making a media player using a listbox, but when I added an Item to the listbox it would display as a URL, so I decided to make a mediaplayer playlist instead then when I add a new song it would put the title of the song in the listbox but I have an issue, when I goto switch the song in the listbox, it shuts down with an error.
[Code]
Private Sub ListOfCrops_SelectedIndexChanged(sender As System.Object, e As System.EventArgs) Handles ListOfCrops.SelectedIndexChanged
View 9 RepliesI am using visual studio express edition 2008. I am trying to move my class.vb files in my web application to one .dll. I used visual express edition 2005 earlier and I had to add to import the below code to get it to work. Now in 2008 edition I get a whole new error and I need to know what I need to Import. Code is below
2005:
Imports Microsoft.VisualBasic
Imports System.Configuration
Imports System.Web
When I do the above in 2008 I get the following errors:
Shared mainconnection As
New Data.OleDb.OleDbConnection(ConfigurationManager.ConnectionStrings("connectionstring").ConnectionString)
Error: Error 1 Name 'ConfigurationManager' is not declared.
[code]....
I want to know how can you making auto exe (automatic program start up)files
I'm using visual studio 2005 .net I want to do that in basic language.
Whenever I create two files with the same name, it overwrites it. I want the second file to be [Name] (#)
View 2 Repliesim making a program that can play mp3 files but now i only have to figure out how to make them load in a listview i thougt of starting the program then letting it show sort of a folder chooser and then it should open the music chooser form ... (that works fine) now to make al the mp3 inside the folder load should i use sort of a filter or somthing i thougt of [code]
View 8 RepliesFirst 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.
I'm making a rating system for people to rate things in a listbox. I've setup so the stars get saved using my.settings, but how would I make it so it gets stored into a database, and it checks to see if they already rated.
View 3 RepliesI have been tasked with making a program that combines text files.. okay.. easy enough. Problem is now I have been asked to make the same program start from the second line of the text files to get rid of headers. I am currently using StreamReader to do this but not sure how to make the reader "line feed" before it reads the data. Any help would be much appriciated. Current code below..
Private Sub BackgroundWorker2_DoWork(ByVal sender As Object, ByVal e As System.ComponentModel.DoWorkEventArgs) Handles BackgroundWorker2.DoWork
Dim writer As StreamWriter = New StreamWriter(Environ("userprofile") + "\Desktop\CombinedFile.txt")
Dim files As String() = Directory.GetFiles(TextBox1.Text)
Dim filename As String
[Code]...
I am making a program that gets files and folders off the internet.I want to make a window simular to a windows explorer window only these would get the files online.My problem is href tags for each one of the nodes and then get the files into the listview control. [code] I can get one node but after that I can't figure out how to get the other nodes to work.
View 1 Repliesi'm making a VB 6.0 project to copy files to WCE 5.0 Device. i copied a code i found in msdn but when trying to compile it send me an error: Expected: Identifier[URL]..
Private Declare Function WaitForSingleObject Lib "kernel32" ( ByVal _ hHandle As Long ByVal dwMilliseconds As Long) As Long
making an application which send some files to LPT port.My Code is
Dim PortName As String
Dim pr As Process
Dim args As New ProcessStartInfo("cmd.exe")[code]....
look at the bold line.1st line Send a file to PORT and 2nd line deleting that file.I am execute this code in a loop.that means those 2 lines are executed in multiple times.As a reason of that,some times these 2 commands are not working properly. so that the file is not deleted. How can the commands are executed in proper way?
i compile my project in windows form visual studio with flash file or .swf included? My project have many presentations, .txt included in the system. How to compile them to an executable file? I need to be my .swf file still on my .exe file
View 1 Repliesi have 2 list boxes.. Qty and Cost both of these are populated from a sql database. The code is suppose to read through the listboxes and multiple the Cost by the Qty and then replace the Cost with the new result. The Cost listbox is populated with the cost of one item. The reason i am not doing this calculation in the sql query is because the sql query is very complicated filter out a bunch of stuff to show just the qty of the item...
[Code]...