i want to get the line number of a text file that contains a particular string data.
1. using the string data like str="book"
2. find if the string is part of the file
3. get the line numbers of where it occurs.
eg
filename=sample.txt
sample.txt contains
dance
book
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i want to delete few lines from a big text file , normally this lines are at the starting of the text file , so it is possible that i can enter the line no from input box and the vb.net can delete that particular line number from the text file ,
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I am trying to figure out how to replace text in a text file on a specific line number. (for testing, line number 4).
View 6 RepliesI'm new here, but have been in and out for a while. Past threads have been helping me along thus far.
I'm currently developing an app which essentially needs a way for me to search in a text box or file for a specific string, and extract the line on which that string appears on. It will be unique, and the syntax is the same on each line. It has basically 2 ID numbers, and is laid out like this:
123456|123456
So, I'd need to search for the first part before the |, and then get the line so I can get the bit after the |, which is the important bit for me.
When the user clicks the Process Files button, do the following:
Read and process the contents of each of the 6 files.
Each file contains data in a different format.
and display them in arrylist. In the list it should contain name of the file and number of person in the text file example below.[code]...
If i have a line in a txt document "text.txt".Now what i want to do is open the file and read the contents.
When it find this "search.selectedEngine" term then it should delete that particular line and replace it with another string ("REPLACED STRING").
How to create an error log system, which will log all errors(caused in my app) to a text file with line number, sub/function in which the error occurred, error details, etc. ?
View 11 RepliesI 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)
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I've been trying to fix this problem for days, but I haven't been able to successfully apply any of the code that I've found to my project the way it is right now. Maybe I'll need to change the way it reads the file altogether.
Anyway, I'm trying to read through a text file line by line, reading each line into its own string.
Deleting a line from a text file. This is for an ASP.net Webpage. I will have a file called Sources.txt. Example data of this file looks like this[cde]...
View 8 RepliesI would like to know how to read from text file that have a line with string A and ignore lines with string B.
View 7 RepliesI have used Mid,InStr and other methods to get a substring of a string from one text file and copied the required string to another text file. While I get the correct string, vbscript however generates a BLANK SPACE after evry character in the output string.
I tried to use the Replace function inorder to replace the " " with ""... but the function does not detect any blank spaces at all to replace.
Instead of copying to another file, I even tried to replace the undesired part of the string with a " " and get only the required part ... but then again it gives the same problem[ a BLANK SPACE after evry character]
ine from a text file. This is for an ASP.net Webpage. I will have a file called ources.txt. Example data of this file looks like this:
View 3 RepliesI 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.
How do i load a specific or a couple of line(not full file) to a RichTextBox by its line no...
For Example if i want load line 14...
Or sometime line 14-18...
I've been looking through the FCL for a method that will allow me to erase a line of text from a text file and replace it with another line of text. Neither the StreamReader nor StreamWriter have a method for replacing or removing Text from a text file, as does the string object. Are there any available methods for erasing just certain lines of text from a file, and then replacing them with others?
In my code, I'd like to locate a certain line in the text file, and then at that point in the text file, use a For...Next Loop to replace each successive line of the text file with new text:
Dim user_data_file As String = "user_data.txt"
edit_input = New StreamReader(user_data_file)
Dim edit_line As String = edit_input.ReadLine
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However, I can't find any methods that will allow me to do this.
How to get a line number that contains a specified string in a text file?
Example text file contains:
Red
White
Yellow
Green
How to get "Yellow" line number? and can i write a string in a specified line, lets say i want to write a string in line 2?
How to get a line number that contains a specified string in a text file?Example text file contains:d White Yellow Green
View 3 RepliesHow can I get a line number that contains a specified string in a text file and write a word one line below it?
View 6 RepliesI have not had much time to go threw my code properly as this is some urgency. I need to remove line 1 from a textfile if it contains a string but its not working.I have 500 files and not going to do this manually.
Code:
Private Sub btnRemove_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnRemove.Click
If String.IsNullOrEmpty(txtDirectory.Text) Then
OpenFolderDialogDirectory()
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I also feel the function is very pointless sime i am opening the file twice.
Is there a way to find ALL of a specified string from a multiple-line text and express their line number as integers?
View 10 RepliesBasically what I'm trying to do is read a text file line by line. After each line is read, it will put each line into a separate text box. I've been trying to do this for a while and so far I haven't been able to. I tried using a for loop, but that just put all my lines in to one textbox.
View 8 RepliesI'm reading a text file with StreamReader, line by line. If a condition is met, then I do an operation and then start reading the file again from the first line. I realize I could close and then re-open the file, but surely this would be very slow.
I could do this easily in VB6, but pulling my hair out trying to do this in vB.net. It seems that 'Seek' is the function to use, but it doesn't work.
I've seen other examples, where it works, but you must open it a different way -- with a file number.
Imports System.IO
Dim I as Integer
Dim LineText as String
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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
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How to count number of text line until certain condition using vb 2008? Here is the code to count the number of line until the end of the text file. But I want to count until certain line of the text file.
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I like search a file TXT with this contains:
Name "Paul"
Age "11"
City "Chicago"
my question is: Its possible get a string "Name" and give me the value "Paul"? I have this function for get strings:
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I need to read a xls/xlsx/ods/txt file line by line,to get a column name of file .how to read a file line by line in vb.net?
View 1 RepliesI am populating a textbox with a single line of numbers that I would like to seperate out into strings.[code]...
View 3 RepliesI have a text box and I don't know how many lines there are and I don't know how many digits there are in the number at the beginning of the line.
View 2 Repliesi am a beginner in vb8 i have a text file named alarm.txt,sample alarm.txt file is shown below
can someone help me to read the alarm.txt file and extract data.for eg
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