Use ReadAllLines Method To Read A File And Print A Line Containing A Particular String?
Jun 29, 2010
I have a text file (CSV) approx 100k lines (8Mb). I want to search the entire file for a particular string eg, "apple" and for all lines containing the string to be printed in a text box. have successfully done this using streamReader to parse the CSV and check each element against the search word eg. apple. This has proven to be very very slow and I have read that the "ReadAllLines" method is much faster.
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?
I use the following command to save my textbox strings to the file:
Sub SaveToolStripMenuItemClick(sender As Object, e As EventArgs)
FileOpen(1,"test.TXT", OpenMode.Output) ' Open file for output. WriteLine(1, textBox_name.Text) ' Print text to file. WriteLine(1, textBox_middlename.Text)
I would like to read an HTML file, search each line to see if it starts with </head>. Then add the centering code after it. That line at destination file should read: </head><table border="0" cellpadding="0" cellspacing="2" width="760"align="center"><tr><td> After this I don't care to search for anything. Just read from source and write to destination. I know there are programs out there to find/replace text in series of files but I am not allowed to use external programs.
what i need to do is open a txt file, read line by line, decode each line into an array and display. Now all works ok apart from one line.
sTextLine = objReader.ReadLine() <-- Value of string cannot be converted.
full code here ------------- Dim objReader As New System.IO.StreamReader(sOpenFile.Text) Dim sTextLine As New ArrayList() Dim sText As String = "" Dim i As Integer = 0
I have a string that contains many lines.It is someething like:
I want to be a millionaire.
I need to read this string line by line, that is to assign line 1 of the string to a certain variable, line 2 to another, and so on.Do you know how that can be done?
I have a txt file that I need to read into a listview, but I need to read from a specific line in that file. Below is a sample of the txt file to read,
I'm trying to read a file line by line into an array but It skips the item at index:3 I have it msgboxing just to make sure and it wont even touch it.
Dim Btn As Button = DirectCast(sender, Button) Dim path As String = Application.StartupPath & "Libraries" & Btn.Text.Replace(" ", "_") & ".ipt" Dim i As Integer = 0 Dim lines As String() = IO.File.ReadAllLines(path)
the best method to read a huge file? I'm guessing its with "stream"?It's like a 200mb file.I need to read each line and do something if the line contains a search string.
Code:Imports System.IO Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim strFile As String = "c:
Dim sFileName As String Dim srFileReader As System.IO.StreamReader Dim sInputLine As String sFileName = "D:UsersArbenDesktopSerieA.txt" srFileReader = System.IO.File.OpenText(sFileName)
[Code]...
under the code I pasted at the top, but I get the text on line1 in all labels, like all labels become 1, while the text should be 1, 2, 3 and so on. So anyone can help me do that, each label gets the value of the next line in the txt file
I have googled this but all it comes up with is some C# and how to read a file line by line which is not what I want, what do you have to use to do this I tried this loop:
Is it possible to read a string and call the method of the same name?For example: I have many buttons and if the user presses the button named A1, I want the Sub AI() to be called. I don't want to do an explicit If-Then for each button. Rather a common ONCLICK method that is called by all buttons and another method (the same name as the name of the button) is called.
Example:
Sub Click(byVal buttonName as string) call ButtonName ' <<<< Error. ButtonName is string and not a Method. End Sub
I have nine pictures that I need to animate -I need to use the ToString method and a counter to concatenate a file name into a string variable from the Image.FromFile method. Once the counter reaches its maximum value, and the last picture is displayed, the counter should be reset to zero or one depending on how the first image file has been name. Also a static counter variable should be incremented in the time routine. what I have so far -- I know what I have to do; however, I just do not know how to code this properly.. Right now I have this going thru a button procedure but it needs to go through a timer.
I am trying to read a PDF file line by line using PDFBox.This is the first time I have ever attempted to do this with a PDF so I am not sure what I was expecting but I thought I would end up with some "mark up", which I could use to parse the lines I was looking for out of the file.
Anyway it didn't work out the way I had planned and I am not sure if that is because I am using the wrong tool or not using the right tool correctly.I managed to extract the text but I didn't really see any mark up that would be usefull to parse the file. Does anybody have any experiece with extracting test from PDFs. What tool(s) do you recomend?
I am quite new in VB NET, after VB. and unfortuantely I had to copy paste and merge the code fragments from some tutorials.
I have a folder including 200 eng files which can be opened by notepad. And each file has around 4000 row; with 60 field seperated by coma. I need to read specific row-field value at each files.
Now what I can is:
a) reading individual txt files and find specific value
b) listing all of the files in the folder
c) I can merge (a) and (b) and read all the files automatically, but since ram is continuously increasing, and at one point (sometimes 163, sometimes 169, or 170. files or something) it gives an error as "System.OutOfMemoryException". My ram is 4 GB and when I get this error the ram is increasing to more than 3 GB.
1- Could it be happen because of being eng files instead of regular txt files?[code]...
how can I read data in a file line by line..for eg in my project I have to store movie information in a file and every movie's info has to be in one line..this is my code for file
Private Sub btn_Read(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click sw.Close() fs.Close() fs = New FileStream(filetxt.Text, FileMode.Open, FileAccess.Read)
How do I read a certain line of a string? Here is my current code: TextBox2.Text = SuperVB.ReadFile(OpenFileDialog1.FileName) Dim lineFirst As String = TextBox1.Text.Line(1) MsgBox(lineFirst) I don't want to read a file's line.
Im trying to use File.ReadAllLines to read a DLL that has plain text. (the DLL is basically a text file)
Dim NewFile As New StreamWriter(Application.StartupPath & "NewFile.DLL") File.ReadAllLines(Application.StartupPath & "NewFile.DLL") I get 1 error, and I have a few questions
I'm having trouble with reading a .txt file line by line, converting it into a string, then putting it into a listbox. When I execute I get an error saying "IndexOutOfRangeException was unhandled" Here is my
