String Supposed To Find And Replace A Portion Of The Text And Write The Changes Back Out To The File Via Streamwriter
Jul 22, 2010
I have thios code that will load a php file (text file) into a sting via streamreader then its supposed to find and replace a portion of the text and write the changes back out to the file via streamwriter. I put my code together and after running it look at the file and it's unchanged. After looking closer it appears the problem is the find & replace operation I am doing on the string. Here is my code:
[Code]...
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Feb 16, 2010
How would I go about replacing a portion of text in a text file with a string?
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Dec 25, 2011
I have to find a string in a huge text file ( ~ 50MB) and then replace it.Since it's quite huge I tend to open the file and then read line by line, and then replace the necessary line(s) (rather than "readall" the file of course).My question is how to replace the whole line?Let's say I found the line that should be replaced . I know I can create a copy file and copy all lines into there ... but I'd prefer to replace the line in the original file rather than creating a copy instance.
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Nov 18, 2010
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.
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Nov 1, 2009
I 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.
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Sep 3, 2010
encountering a problem when trying to write data to a text file. If I put the output into a messagebox I can see it, but when I attempt to write it to a file it is just blank. What am I missing here? EDIT - This is just a simple winform that I specify a path to a local HTML file in Textbox1 and I'm attempting to parse some HREF tag data.
Imports System.IO
Imports System.Text.RegularExpressions
Public Class Form1
[code]....
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May 5, 2009
The file reads in parameters and two of the parameters used to be in Date Format YYYYMMDD but will now permanently be in format YYYY-MM-DD. This change, I believe, is stopping the import of the file from working. I would like to replace the new format YYYY-MM-DD back to YYYYMMDD in the code. If possible I'd also like to see some output so I know that the old format has been replaced with the new format. The code is below. I added the two rows with .replace code in green in expecting that to be enough but it is still not working.
Public
Sub Main()
Dim R1, O1, P1, C1, strDateFrom, strDateTo, strRunDate
As
String
[CODE]...
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Jan 20, 2012
I've got a listbox build up as an array of items like this: First column is product id, 2nd column is name, 3rd column is price, 4th column is amount and I put them in an array: Public Item(3) As String,
7226218; Hemlock; 22.55; 0
7711175; Pine, Radiata; 12.45; 0
2229886; Pine, Arkansas; 15.25; 3[code].....
how to change the line if the Order(0) value is found in the listbox with the new amount value..
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Mar 25, 2011
I'm writing on a texthandler-project for Vista.(Compiler : Visual Studio 2010-vb)My code must write a string back to file after trimming. I've decided to run the application as a full trust app. The code obtains the permission via fileiopermission,but still the result is:Acces is denied/Unauthorizedaccessexception (It's not Readonly).
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Mar 14, 2012
I have this code attached to a button
If htmlText.Contains("<frame src='demo.html'/>") Then
htmlText = htmlText.Text.Replace("<frame src="demo.html/>", "<frame src='" &
OpenStory.FileName)
[code].....
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Jul 2, 2009
I have a text file which look like this:
M48
METRIC,LZ
VER,1
FMAT,2
DETECT,ON
%
G93X0Y29
T250
X22Y0
X0Y0
T169
X016038Y11991
X203998Y11991
X203998Y-134725
T168
X216888Y105277
X216Y-108
X003148Y105277
X004Y-108
T170
X11Y1535
T176
X119035Y-126978
X024039Y-119104
X024039Y-120374
X024801Y-117961
X048118Y-124438
Now I need to do is I need to read the file after the line DETECT, ON then if I find T250, T169, T176.....Txxx which ever line start with T. I must read and write that line back in between the line FMAT, 2 and DETECT,ON in my same text file.
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Jun 3, 2011
I am making a program for work, i have it partly coded, unfortunately i don't have a wifi connection for my laptop right now which makes it hard to add my code here. What i am trying to do is have the user pull in a text file from anywhere on the computer using a open file box that pops up, i got that part, to make sure that is working i have a textbox that reads the data of that text file, it gets pulled in fine using a stream reader. Now what i need to do is search the text file for certain values, and depending on the selected item in the listbox which is on another form, change that value in the text file, im guessing i will need to use a stream writer, and ive seen examples used based on the file location(C:....) but in my case im not sure how to do it.
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Apr 12, 2012
I am using Visual Basic 2008 Express Edition, my goal is to read an entire .txt file that works as a template and replace all ocurances of a word with a new one and save this new modified text in a new .txt when you press a command button.
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May 22, 2011
How to write back into a text file with skipping the first 2 lines
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Jan 1, 2007
I have a project to complete and i have begun the code. What i want to do is go through the text file and find evey | (pipe) symbol and change it to a , (comma). I have the code and worked out how to do it but the code will only work for the first line. I was just wondering whether any of you had any advice on the way through this problem because i am stumped.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As_ System.EventArgs) Handles Button1.Click
Dim strFile As String
[code].....
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Aug 6, 2011
I have a small app for find and replace text in a richtextbox:
1-One button: Replace
2-Textbox1 : Find
3-Textbox2 : Replace for
But I want to know if is possible find and replace the text in the richtextbox with a xml file example:
Text in the richtextbox: "I will buy a car"
XML:
<pre lang="vb">
[Code]...
If is possible please can you give me a example code?
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Jun 2, 2010
Been trying to get somewhere with this in another thread, but no such look, just keep getting reffered back to the same documentation... If I understood the documentation, I would have fixed it by now:
vb.net
Private Sub MakeiSuitePwdFile()
Dim text As String =
[code].....
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Feb 11, 2010
lswScriptreader =
New System.IO.StreamReader("test.txt", System.Text.Encoding.Default)
lswScriptwriter = File.AppendText("test1.txt")[code]....
Hex(D1) is my column Terminator and need to replace it with ",".
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Aug 4, 2011
I have a program that will read a text file and put information from the text file into multiple text boxes. What I am trying to do now is be able to change the values in the textboxes and be able to write the specifc changes back to the text file. One way I though of doing that was using a while loop and copy the lines of the text file to another text file, then when it finds the line that has the specific change from the text box, make the change and continue writing the line until it reaches the end of the file. Then I was going to copy the file and overwrite the original, escientally making the change to the new file. Right now it will make the new file but will just make a blank text file. I think the problem is in the while loop statement but I am not sure. Here is the code below:
Code:
Private Sub submitButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles submitButton.Click
Dim trackname As String
[Code].....
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Nov 13, 2011
1) a text document which has content like :
uber|uber|ultra
taxi|taxi|taxi cab|cab|minicab|airport taxi|airport transfer
genitalia|genitalia|genitals
[code].....
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Dec 9, 2011
I have a bunch of object variables which are all initialised in their declarations such that:
Private _myObject As New ThisObject("SomeString")
where ThisObject is one of a number of object types, but all are initialised using a string.
I would like to use the Visual Studio Find/Replace dialog box to search for "As New" then replace everything from "As New" to the first set of speech marks with some text such that:
EDIT
My original example could be solved using other methods. This example is more representative of the actual problem:
Private _myObjectA As New ThisObjectA("SomeString")
Private _myObjectLongName As New ThisObjectLongName("SomeString")
[Code]....
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Mar 15, 2008
I have a code which reads a text file through streamreader,selects what is important and writes the same to another fileusing streamwriter. The problem is that the streamwriter stops writing beyond a certain line and just doesnt write ahead.What can be the problem? Do I have to make two seperate files?
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Apr 13, 2012
why if I use StreamWriter .WriteLine, 001(zero,zero,one) is converted to 1? how Can I write in a file 001(zero,zero,one)? [Code]
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Jan 29, 2011
How can I open a text file, find a certain word in the text file, and then, just before that word, write a line of text to the file - then save the file?
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Jun 2, 2011
I am trying to read the content from a .csv file and storing it in a variable. Later I am writing that content into a newfile. Code is executing successfully but the data is not appearing in new file. Here is my code:
[Code]...
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Aug 15, 2010
What would be the most quickest way to edit a text file on a remote host?
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Apr 10, 2011
i need help with stream writer, i can get it read lines and stuff like that but now i need Streamwriter to write to a colour.txt file (already populated with data) and insert a line that isn't already in the file, into alph order eg combobox reads and displays list from txt file.
their is a colour thats isn't in the text file, so i would like it to take the colour from the combobox that was typed in by the user and place it into the colour.txt file in alphabetical order (these are car colours so their are 100's and 1000's per manufacturer, its not as basic as i want red blue black lol) i was able to find loads of data about streamreader but not so much about stream writer
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Apr 26, 2012
I have an issue with finding specific text within a string and then replacing it with " ", which is just a blank entry.[code]So now my issue is to search the ABCTEST text and delete text such as "Tier Market" from it. Then pass it to a new string perhaps ABCTEST_NEW..I know i might have to use a for loop to search out the keywords, but all the examples i have had a look at, are very broad.
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Aug 14, 2010
Dim r As String
If r.Contains("src") Then
r.Replace("src=""", "")
'r.Replace("src='{0}'", "src='http://google.co.in'")
End If
Response.Write(r.ToString())
Response.End()
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Jun 7, 2011
I've got an application that passes commands to a terminal window and saves all the output to a text file Here is one of the commands my application passes to the terminal
MyProcess.StandardInput.WriteLine("host " + device)
The output of which is
"HostA has address Y.Y.Y.Y"
this along with a whole bunch of other text is saved to a text file...my question is how do I find the sting "HostA has address Y.Y.Y.Y" in that text file and then extract the IP address and assign it as a string variable?
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