.net - Process Plain Text File
Apr 12, 2012
I'm trying to use VB.NET to process a very large plain text file (2 GB). It is a database and has a field delimiter of SOH and a record delimiter of STX.
I want to separate the fields and records of the file.
I would normally read each line of a text file and then use the split function to separate out the fields. I can't use this approach as there isn't always a delimiter on every line.
Is there any way to read a file until STX is found (rather than one line at a time)?
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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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Mar 30, 2010
I'm sort of new to VB and have to use it for my Software Design & Development Major Project.I'm making a blackJack game, and i the names of all users in a file called "CurrentUserNames.txt".I'm struggling to get VB to read this file (items are line by line not separated by a comma or something) and then save it into an array called CurrentUsers(). This array is then displayed in a listbox called "lstAllUsers".I can get VB to read the file and put the FIRST item in the file into the FIRST line of the list box, or i can get VB to put ALL the items in the file into the listbox, separated by the little [] squares when the program runs e.g listbox, line 1 says - "Current [][] Names".[code]
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Oct 18, 2009
Im trying to use File.ReadAllLines to read a DLL that has plain text. (the DLL is basically a text file) [code] The process cannot access the file '****DebugNewFile.DLL' because it is being used by another process.How do I use readalllines to find text? How do I use readalllines to only search a part of the text file?
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May 20, 2011
I know this script [below] gives the pc motherboard number ,...well I would like to know how to write the result number as plain text somewhere in the windows, in a folder, or registry , or in a harddisk volume,... I know I could use
FileSystemObject CreateTextFile
I dont know how to insert it in the code , I tried but it gives me error
Code:
strServer = "."
Set objWMI = GetObject("winmgmts://" & strServer & "/rootcimv2")
Set objInstances = objWMI.InstancesOf("Win32_BaseBoard",48)[code].....
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Apr 24, 2012
I have a desktop application displaying text in a read only RichTextbox component. Some words in the text needs to be highlighted depending on a text analyze that was previously executed.Now I need to create a web version of this application.I know there's a couple of Rich Text Editors available but I would like to know if there's a library or a simple way to generate an properly tagged HTML string from a plain text and a list of word to highlight?
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Jun 14, 2011
I have a program, that allows writers to save there quotes. The quotes are saved in a xml file. Everything works as it should but when I load a saved quote it still comes up in xml format. I need to load a saved quote in a plain text format and I also want to be able to give the output file print functionality. I was thinking of making the output file a html file which opens up in a web browser, this of course already has print functionality, is this at all possible.
[Code]...
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Sep 9, 2011
I'm writing a replacement for an old library we use at the office to communicate with a rather clumsy and old custom-made C++ framework that takes requests via sockets in order to communicate with a bunch of other systems. The problem is that it will only take plain text messages containing a string which must be formatted in a very specific way.The problem I'm facing is that I haven't found so far a way of sending plain text through the socket. The Send method of the socket will only take byte arrays, and while the listening point receives the data, it gets there completely scrambled, and there's no way I can mess with that in order to convert the byte array back to plain text. I need to be able to send plain text, not byte arrays.[code]
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Feb 7, 2012
I am using Visual Studio 2008 Pro to create a web application in Visual Basic. This app takes the information filled in by a user and then sends it to various people. Some of these people get the email in HTML, the rest in plain text. However, whenever I use the code below to send the plain text email, when the email arrives in my Outlook 2010 Inbox it is completely blank. If I leave the code alone and change only .IsBodyHTML from False to True, it works (it sends the email formatted for HTML).[code]Also, if I create an entirely new web app, using only this code, it sends the email correctly as plain text.
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Jan 1, 2010
i am programming a note and i save the plain text of the richtextbox1 to a notepad then i want to print it i use this code but it print the frist line only and i want to print all lines Private Sub SaveToolStripMenuItem1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SaveToolStripMenuItem1.Click
[Code]...
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Nov 24, 2011
Just like the notepad, it will not allow you to paste any picture in it, and it will convert all formatted text to plain text. It will not change the content of the clipboard, it just like a filter... Is there any way to do it in VB.NET?My program screenshot:
I had a solution in my brain but I think it is not the best... The solution is reformat the text with
richtextbox1.font=myfont after any time I pasted, but it still can paste the other thing like object and picture..
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May 12, 2009
for example I have this plain text:
Quote:
ID=100000CUSTOMER=JohnAMOUNT=2300020INVOICES=123CALLS=12ID=100001CUSTOMER=MaryAMOUNT=589INVOICES=2CA LLS=0ID=1002122CUSTOMER=DanielAMOUNT=8900000INVOICES=5CALLS=1
[code].....
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Oct 14, 2009
I am using a thread to call a process which is spliting a text file into various text file and folder using the system.io , now when calling the Textsplit() with thread on click of a button i am getting the error below , how to use thread and why this error occurs.
Cross-thread operation not valid: Control 'txtbox_destn' accessed from a thread other than the thread it was created on.
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Apr 23, 2010
I have a DataGridView in a Winforms application containing a collection of items. Each item has an image and various other details. I know it is possible in WPF, but can you get a tooltip to display an image and a more structured set of details then just plain text?
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Feb 14, 2012
I have a program written in VB.NET and I have a textbox for the RFID tag (which is in ASCII format) and then convert it to a simple text format to be saved to my database. How can I convert ASCII to plain text to save to my database?
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Jan 31, 2011
I am trying to mimic an encryption application. The application I am mimicking does a simple calculation where it takes the key and the plain text characters 7 bit ascii code and xor's them together. If the two spots in the code are = then it returns a 0 if it is ~ then it returns a 1. I have tried several code snippets for xor and none of them produce the results I want. I have only taken a couple programming classes so I get lost easy. This is what I have so far. My goal is to decrypt something encrypted by the program I am replicating using a password generator to come up with the key.I already have the binary for the encrypted text from the program I am copying. So I need to convert the key into the matching binary format. I used this snippet for that. [code] When I run this as is I get a much longer result than I should. If I use an "a" as my key and "00000000" as my cipher bi the result is "0011000000110000001100000011000000110000001100000011000000110000" when it should be "01100001".
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Apr 26, 2009
Does Visual Basic have a function to switch between HTML character entities and plain text natively?
EG. > < to > <
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Dec 10, 2010
I have a log file that is open and in use by another program, and I read it's contents with the following:[code]This works for reading the text from the file while it is still in use by the other program, however, immediately after this I need to truncate the text file (without deleting it) so that it is blank again. But the file will still be in use by the other program.[code]But I get the "in use by another application" exception. I've tried looking in StackOverflow and googling but I can't seem to find an answer, and I can't find a way to do this with filestreams either, or I would try to use Dim fs As New FileStream(FullPath, FileMode.Open, FileAccess.Write, FileShare.ReadWrite)
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Jun 30, 2012
I am trying to create a program that will refresh a *.log file within the program itself (in a RichTextBox), but while the actual application that is writing to that *.log file is open and is utilizing that file as well.
I have tried multiple things with StreamReader, but I can't seem to get anywhere...
Simply, I want to be able to read a *.log file in my Visual Basic 2010 program, but while the actual application that is writing to it is running itself.
How can I do this, as I keep getting the error that another process is utilizing the *.log/text document?
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Jul 25, 2009
I have an App that saves one line of data to a textfile like this[code]...
'
If I try to overwrite that file or delete it I get the error "The process cannot access the file 'c:windowsDScatalog.ini' because it is being used by another process."
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Jun 22, 2010
I need to logging the process list and saving it as a text file. I need it so that it will log any new program that opens up. Basically monitoring the process list.
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Jun 10, 2011
i'm having trouble opening a text file to process and order the data in it. When i try to read the first line of characters an error message occurs saying: 'Variable words1 is used before it has been assigned a value.' I dont understand what i am doing wrong when opening the file. Also, I am sorry if this is a rather basic question.
[Code]...
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Apr 21, 2009
Suppose I have this Dim proc As Process proc = Process.Start("Notepad.exe", "C: est.txt") Now, if I want to use Notepad.exe to open another text file (ie. C:2ndTextFile.txt) without closing it, how am I going to do it?
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Sep 21, 2007
When I load my solution and compile it after first starting the IDE, everything works as expected. After changing source and recompiling, I get the following compile error:
Error 11 Unable to copy file "objDebugCAMDRS.Library.dll" to "binCAMDRS.Library.dll". The process cannot access the file 'binCAMDRS.Library.dll' because it is being used by another process. CAMDRS.Library.
After closing Visual Studio 2005 and reopening the solution I can compile again successfully. This is an old solution that has been fine for a long time. I just recently changed computers and reinstalled everything.I am running win XP Pro sp2, Visual Studio 2005 sp1.
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Feb 1, 2012
My program writes to a .txt file (and this is the ONLY program that writes to it) in a thread (with lowest priority), but every now and then it gets an error "The process cannot access the file because another process has locked a portion of the file" when it executes this code: swLog.WriteLine(sPacket).Other program reads from the file, not write to it, why do I get this error, and how can I get around it, or what shall I do when I get this error since I can't write to the file ?
Class
clsFile
Private swLogOrig As StreamWriter
[code].....
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Feb 2, 2009
I am trying to automate a process I do with a bank with vb.net. Basically I need to open a website and navigate through it (Automatically through the program obviously), enter a batch ID and enter a file path and name. For some reason when I get to the part where I need to enter the file name and path, it simply will not populate the text. I have attached a word document with screenshots and code. The only difference I can see, is that in the bank website's code the the input type for the file text is "FILE" rather than "TEXT" as it is for the batch id...
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Sep 1, 2009
I am getting an error with this code.
The process cannot access the file 'C:UsersdavidDesktopTest Folderdavid 2.xml' because it is being used by another process.
how do i end the prosess after I create the file? Or am I creating it in the wrong manner.The underlined line is where the error ocures.
Public Sub AddDTData(ByVal value1 As String, ByVal value2 As String, ByVal filename As String)
dtUser.Rows.Add(value1, value2, Now.Date)
If My.Computer.FileSystem.FileExists(filename) Then
[code]....
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Sep 13, 2011
I try to open a text file and write in some text, when i run the program it says the following error:The process cannot access the file 'D:VB projectsCategory_Characteristics.txt' because it is being used by another process.
THe code is as follows and the error hits in line :
Dim objWriter As New System.IO.StreamWriter(FILE_NAME)
-----------------------------------------
Dim FILE_NAME As String = "D:VB projectsCategory_Characteristics.txt"
[code]....
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Aug 31, 2009
How can i access a file through FileStream which is being used by a window service. Actually i am trying to access a file which is also being used by our window service. I need to read data from this file. I am using below code but also getting following error:
Code:
Dim fs1 As IO.FileStream = New IO.FileStream(psPath, IO.FileMode.Open, IO.FileAccess.Read, IO.FileShare.Read)
Dim sr As IO.StreamReader = New IO.StreamReader(fs1)
sData = sr.ReadToEnd
Error: The process cannot access the file 'FILENAME' because it is being used by another process.
I tried changing FileShare.Read parameter to FileShare.None but it didn't work out. I also read below post which says that it is not possible but i think there is a way to read it like if you open a file through Firefox but still window service is accessing it.
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Oct 27, 2011
I am working with saving and deleting images. What i really want to do is check and see if an image exists in the destination folder and if it does automatically overwrite it. i couldnt figure that out so i figured i would look to see if the file was there if it is Delete it then write the new file..The issue is i keep getting this error.The process cannot access the file "FileName" because it is being used by another process. [code]
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