Use Of Backgroundworker While Open A Large Text File?
Apr 3, 2010How to Use of Backgroundworker while open a large text file
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Open Large Rich Text File Smoothly?
Jan 8, 2010If there is any way to open large rtf files in rich text text box ?when i try to open a large rtf file in rich text box it halt the system unlike windows word pad . win word pad open file smoothly may be read line by line how it possible in vb.net?
View 3 RepliesOpen A Large Text File / Find And Replace A String
Nov 1, 2009I would like to step through each *.txt file in a given directory, open it, find and replace all, perhaps a thousand, occurances of a given string (e.g. "00/00/00"), then close and save file, and step to next one in the directory to do the same find and replace. I've been looking at filestream classes and regular expressions but don't see a clear way to do this.
View 4 RepliesBackgroundWorker Progress On Large File Copy?
May 23, 2011I have created a simple Backgroundworker process to copy a large file (30GB). Is there any way to report the progress of that file copy?
I'm using System.IO.File.Copy to perform the copy. I've seen a few posts/blogs that suggest comparing the bytes copied with the size of the source file but that seems like a huge overhead in this case.
BackgroundWorker To Update Progressbar And Label While Downloading Large File
Mar 10, 2012I place some code below to simplify the process.
1) I am trying to use background worker to download a large file and update a progress bar to reflect the changes as the large 5GB file is being downloaded, and also update percentage completed to the label.text(lblInfo).
2) As I was goggling I came across some info that a web client is needed to calculate the maximum size of the file and divide by 100 and you can stream it down with the web client. Reading it is one thing, implementing it is another as I spent week trying to get it to work.
UCPocoAPoco
Imports System
Imports System.IO
Imports System.Diagnostics
[code]....
Reading A Very Large Text File?
Jan 30, 2012My problem is I have very large text files (approx 2GBs+).They have records in them based in one per line.Each line is not the same length and the data can be different lengths all the time.I am currently reading the file line by line, then splitting the data by common characters in the records. To process the full file it currently takes 3hours. This is way too slow for its purpose.
View 4 RepliesReading Large Text File?
Jul 6, 2011I've a problem reading text file using StreamReader. The file have between 500 000 and 1 000 000 lines.When I try to read it in a cycle, I get an error. That's why I've tried the StreamReader.ReadToEnd method. It worked fine. I've get the entire contents of the file in one string. So far everything is okay, but I've a small problem searching this huge string. I have to reformat the string to my desired format. I'll try to be more specific: The format of the input file is as follows:
50471100 8 2 6 5 0<LF><CR>
00000016 365442 12231<LF><CR>
00000026 112166 31133<LF><CR>
<end>
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Formatting :: Reformat A Large Text File?
Dec 10, 2011I am faced with a rather large text file (200-400 lines)The file displays a lot of data however the problem is that it is not lined up. The data at the moment resembles this
Column1 Column2 Column3 Column4
Bobby Fisher Virginia Rural
Willis Johnson Oklahoma City
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[2008] Reading A Very Large Text File
Feb 1, 2009The following code suppose to:
1. Read line-by-line a txt file with more than 500,000 lines, (each line 521 characters long)
2. extract an ID No from the line
3. query from a database for LCCIStatus
4. concatenate the value of LCCIStatus to the line
5. write the line to sample.txt
My problem is, this code works perfectly with the test file of 8000 lines but fail with the actual files which have over 500,000 lines. FYI, the test file contains data which I cut and paste from the actual file.
[Code]...
[2008] Parse A Large Text File For Certain Strings
Feb 22, 2009I am trying to parse a very large text file for certain strings. The text file is part of a level-making software for an old game I play. The text file basically contains all the information the level designer software needs, but the only important bit is the 'texture information'. Basically what I'm trying to create is a little program that parses the text files and shows the user a list of every texture in that text file. The problem is, the strings denoting textures are not really easy to find, and I can't think of any sensible and fast way to get them...
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Searching A Large Text File And Returning A Searched Word?
Jul 12, 2011My app is a Bible Reader. At load up I can choose Genesis Ch1 and its entirety pops into a rtb. I enter a word to search for like 'God' and hit the SEARCH button. The results I get are initially what I want. I get the verse 1:1 In the beginning God created the heaven and the earth. But then the app replaces the script with other words containing God, but all jumbled up. Here is the code I am using: Private Sub ToolStripButton2Search_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ToolStripButton2Search.Click Dim stSearch As String stSearch = Me.ToolStripButton2Search.Text For Each Line As String In File.ReadAllLines(Path.Combine(Application.StartupPath, "Bible VersionsKJV 1611King James Version of the Holy Bible.txt")) If Line.Contains(Me.ToolStripTextBox1.Text) Then Me.RichTextBoxViewer.Text = (Line) End If Next LineBryn Ryver
View 2 RepliesStreamwriter - Replacing Specific Values In A Large Text File
Jun 4, 2011I have some large csv files (1.5gb each) where I need to replace specific values. The method I'm currently using is terribly slow and I'm fairly certain that there should be a way to speed this up but I'm just not experienced enough to know what I should be doing. This is my first post and I tried searching through to find something relevant but didn't come across anything.
My other thought would be to break the file into chunks so that I can read the entire thing into memory, do all of the replacements there and then output to a consolidated file. I tried this but the way I did it actually ended up seeming slower than my current method.
Sub Main()
Dim fName As String = "2009.csv"
Dim wrtFile As String = "2009.1.csv"
[Code]....
TIP 1: Index Lines In Large Text File For Fast Random Access?
Jul 14, 2011When you need to do random access to the lines of a text file, the regular solution is to put those lines in a list and access them in that list.But doing this if the text file is large creates a large memory overhead and may cause some memory stress on the application.This class maps the file and provide the ability to read any particular line in the file at a random position, without the need to read or put in memory any other line but the desired line. The only memory overhead involve is the 1024 bytes buffer of the base stream.Even if the file mapping can be a process that consume a noticable amount of time if the file is very large ( ~ 5 seconds for each 100,000,000 caracteres) , once the mapping is done the access to a particular line becomes instantaneous regardless of the size of the file. (The file mapping can always be done at a convenient time (ex when the process load) and can be done on a worker thread The class is base on a StreamReader to support the differents Text Encodings Example uf usage ( As I say, if the file is very large, dont do it like that, but declare the class at a convenient time)
Imports Reader = System.IO.MyStreams
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
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VS 2008 Pre-Load A Large Text File List Items In Dropdown
Oct 28, 2010I need to load a large txt file that is in a fixed width format. There are over 45K lines, so speed is important.I need to load one of the fields into a dropdown box and have another field (label) display the text of another field in the related line.I could import the file to an access db if needed, but would rather not as i also want the txt file to update from a link on a regular bases. So having it in a DB would be more work to process that part.[code]
View 1 RepliesOpen And Re-open A .doc File In The Rich Text Box Control?
Apr 28, 2011I saved a file with the extension .doc. I use the RichText to write and save the text. I did not set any encoding type when I saved it. When I tried to open the file in the Richtextbox again, I got all the formatting characters in the RTF file. How do I correct this? How do I open and re-open a .doc file in the Rich Text box control without the formatting showing up in the box with the document contents?
View 4 RepliesUse Open File Dialogs To Open A File To A Text Box?
Nov 18, 2009how to use open file dialogs to open a file to a text box?
View 6 RepliesHow To Open Large PDF Files
May 13, 2009I am opening a large PDF file using the following
Process.Start(Application.StartupPath & "PREVI.pdf")
I have two questions:
1) Is there a way to go directly to a page number?
2) Can I write a code to have the table of contents show up on the left side of the document so users can click on to go to different sections of the document, not sure if this needs to be done while creating the PDF or if we can do it by code.
ADO Open And AddNew Method For Large Database?
Feb 8, 2010[code].....
View 1 RepliesInterface And Graphics :: Open Very Large Image
Aug 13, 2008I have a map image and i want to open it look like ACDSEE (very fast)my image is 12756 x 8504 pixel and i try backbuffer but not work for me.
View 3 RepliesOptimise Text File Ascii Writing From Large Array (3000 X 3000)?
Jul 28, 2010I am writing a 2D array to a text file.Is it digital map data, so I write each row at a time, and the format is readable by my map application.I have pasted the code below. The array is called edgegridArray. Everything else is pretty obvious. I don't know if streamwriter is the best way to do things,
Dim swr As StreamWriter = New StreamWriter("D:edgeoutput.txt")
swr.WriteLine("ncols " & cols - 2)
swr.WriteLine("nrows " & rows - 1)
[code].....
Reading A Text File Into A Checked List Box Through The Open File Dialog?
Apr 4, 2011I have a checked list box that is populated with the text from a text file. I started off with this code:
Dim FileToLoad As String
FileToLoad = TextBox3.Text
Dim fs As FileStream = New FileStream(FileToLoad, FileMode.Open)
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Open A Text File And Add A Line Of Text At The End Of A File?
Dec 7, 2009What kind of code would I need to open a text file and add a line of text at the end of a file. IE "C:UsersAdministratorDesktopfile.txt"...??? Then save it of course.
View 4 RepliesOpen File Using Text Box Text Input
Sep 22, 2011I am trying to write code that will open a file with the input from a combobox from the user. My code is below:
[Code]...
Open A Text File In VB?
Jan 15, 2012I have this program that validates error and then logs it in a text file,but here is the problem, I want to know how show the text file that has been made after the logs have been written,
for example, I have validated all the errors, and then creates a text file that has appended all the strings, then after my pop message, I want the text file to pop also, showing all the logs that have been created..
How To Open And Read An XML File To Text File
Feb 25, 2010I have created 2 format types(ELEMENT, ATTRIBUTE) of XML File.To open and read the ELEMENT Format type and write the row into TEXT string for display is fine but the ATTRIBUTE is not working.The problem is how to identify the format type at runtime in order to develop the script.The scripts below works on ELEMENT format and not on ATTRIBUTE type..How to identify the Format type? [code]
View 5 RepliesMake Open A File With The Name Of .mxp And Any Text File?
Jun 26, 2010how do i make this open a file with the name of .mxp and any text file how do i add that in. and how do i open the file mxp to Private Sub SaveToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SaveToolStripMenuItem.Click
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Text Editor - Loading Multiple Large Text Files
Jul 10, 2010I'm fairly new to VB.NET, and I'm working on a text editor with a tabbed interface. I deal with large text files. Should I have each tab / text document open up in a new thread or a process? I basically want the entire application to always run fast as the text editor is just one part of it. If I have several large text files open I don't want the rest of the application slowing down a bit.
View 2 RepliesClose Open Text File?
Mar 20, 2012In 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]....
Detect If A Text File Is Open?
Jan 16, 2009Is there any way to determine if a text file is currently open in a text editor? Or better yet, is there a way to trigger an event when a text file is opened (from any program)?
View 3 RepliesImport Certain Text From Txt File To Open URL?
Apr 12, 2010I am once again working on a project and have hit an absolute wall! Here is what I'm trying to do:
1. Create a Userform that has one textbox and one button.
2. Have the user enter text in the textbox and press enter.
3. Once enter is pressed have the form take the data they typed into the textbox and search a specific .txt file (beginning the search from bottom to top to find the most recent entry) until it finds a match.
4. Take the latitude and longitude to the right of the match and convert them to proper form. Right now my SQL provides live updates to the .txt file only the lat/lon come accross as |-112053440|33427640|, so I need to insert decimals in the correct places.
5. Either way, they type "c123" it will search until it matches that then take the latitude and longitude that is to the right of the match.
6. Convert the latitude/longitude into proper format because if it pulls the data as is it will appear as[urls]...
