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How do I remove corrupted data from .csv file?

So I have lots of data but I'm not sure how I remove the corrupt data.
In the file the list is like this:
EMERIE,ESPARZA,166,57,34,BLUE,BLONDE
ADALINE,PARSONS,158,39,£$**),BROWN,GREY
The £$**) represents corrupted data but I don't know how to remove it, I have over 10,000 names and some of them are like this.

Assuming you want to completely remove the corrupted data rows rather than modify them, you could do something like the following:
public void RemoveCorruptData()
{
string path = #"C:\CSV.txt";
string newPath = #"C:\new-CSV.txt";
List<string> lines = new List<string>();
Regex corrupt = new Regex("£$**");
if (File.Exists(path))
{
using (StreamReader reader = new StreamReader(path))
{
string line;
while ((line = reader.ReadLine()) != null)
{
if (!corrupt.IsMatch(line))
{
lines.Add(line);
}
}
}
using (StreamWriter writer = new StreamWriter(newpath, false))
{
foreach (String line in lines)
writer.WriteLine(line);
}
}
}

Read line by line from Website

I have a website (php) with two lines.
I try to read the content with following code:
var url = "WEBSITE.php";
var client = new WebClient();
using (var stream = client.OpenRead(url))
using (var reader = new StreamReader(stream))
{
string line;
while ((line = reader.ReadLine()) != null)
{
//Do whatever
}
}
Unfortunately the string "line" contains not one line of the two lines. It contains the whole content with tags...is it possible to fetch line by line? or have i to delimit it by myself?
Thanks!

You could do that a little bit easier by using something like this:
string url = "WEBSITE.php";
string content = WebClient.DownloadString(url);
foreach (string line in content.Split(new string[] { "<br>", "</br>" }, StringSplitOptions.None))
{
// Do something with each "line" ;-)
}

I am having trouble with streamreader in c#

I am having a little trouble with the streamreader.
I am opening emails from the file dialog, and those emails are placed inside a listbox.
each letter in the emails, are on one line, as shown in the picture below.
I want the emails to be on one line, can some one help me, this is giving me a headache.
private void button2_Click(object sender, EventArgs e)
{
OpenFileDialog ofg = new OpenFileDialog();
ofg.Filter = "Text Files|*.txt";
if (ofg.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
var fileName = ofg.FileName;
StreamReader sr = new StreamReader(File.OpenRead(fileName));
var line = sr.ReadToEnd();
foreach (var l in line)
listBox1.Items.Add(l.ToString());
sr.Dispose();
}
}

var lines = File.ReadAllLines( fileName );
foreach (var l in lines )
{
listBox1.Items.Add( l );
}
assuming that you have
email1#email1.com
email2#email2.com
in your file (this is what I understood from your description).

use this:
string line;
while((line = reader.ReadLine()) != null)
listBox1.Items.Add(line);

Use it as follow:
using (StreamReader sr = new StreamReader(File.OpenRead(fileName)))
{
string line;
while ((line = sr.ReadLine()) != null)
{
listBox1.Items.Add(line.ToString());
}
}
This reads all the lines in the file and adds it to the listbox line by line.

string containl chars, so foreach (var l ...) iterates through chars in line.
You should replace your foreach with
foreach( var email in line.Split(' '))
In case your emails separated with spaces.
Another approach would be File.ReadAllLines, in case emails in your file is on separate lines...

using (StreamReader sr = new StreamReader(File.OpenRead(fileName)))
{
while (sr.Peek() >= 0)
{
listBox1.Items.Add(sr.ReadLine());
}
}
Reference: http://msdn.microsoft.com/en-us/library/system.io.streamreader.readline

How to add lines of a text file into individual items on a ListBox (C#)

How would it be possible to read a text file with several lines, and then to put each line in the text file on a separate row in a ListBox?
The code I have so far:
richTextBox5.Text = File.ReadAllText("ignore.txt");

String text = File.ReadAllText("ignore.txt");
var result = Regex.Split(text, "\r\n|\r|\n");
foreach(string s in result)
{
lstBox.Items.Add(s);
}

string[] lines = System.IO.File.ReadAllLines(#"ignore.txt");
foreach (string line in lines)
{
listBox.Items.Add(line);
}

Write a helper method that return the collection of lines
static IEnumerable<string> ReadFromFile(string file)
{// check if file exist, null or empty string
string line;
using(var reader = File.OpenText(file))
{
while((line = reader.ReadLine()) != null)
{
yield return line;
}
}
}
use it
var lines = ReadFromFile(myfile);
myListBox.ItemsSource = lines.ToList(); // or change it to ObservableCollection. also you can add to the end line by line with myListBox.Items.Add()

You should use a streamreader to read the file one line at a time.
using (StreamReader sr = new StreamReader("ignore.txt"))
{
string line;
while ((line = sr.ReadLine()) != null)
listBox1.Items.Add(line);
}
StreamReader info -> http://msdn.microsoft.com/en-us/library/system.io.streamreader.aspx
ListBox info -> http://msdn.microsoft.com/en-us/library/system.windows.forms.listbox.aspx

Delete specific line from a text file?

I need to delete an exact line from a text file but I cannot for the life of me workout how to go about doing this.
Any suggestions or examples would be greatly appreciated?
Related Questions
Efficient way to delete a line from a text file (C#)

If the line you want to delete is based on the content of the line:
string line = null;
string line_to_delete = "the line i want to delete";
using (StreamReader reader = new StreamReader("C:\\input")) {
using (StreamWriter writer = new StreamWriter("C:\\output")) {
while ((line = reader.ReadLine()) != null) {
if (String.Compare(line, line_to_delete) == 0)
continue;
writer.WriteLine(line);
}
}
}
Or if it is based on line number:
string line = null;
int line_number = 0;
int line_to_delete = 12;
using (StreamReader reader = new StreamReader("C:\\input")) {
using (StreamWriter writer = new StreamWriter("C:\\output")) {
while ((line = reader.ReadLine()) != null) {
line_number++;
if (line_number == line_to_delete)
continue;
writer.WriteLine(line);
}
}
}

The best way to do this is to open the file in text mode, read each line with ReadLine(), and then write it to a new file with WriteLine(), skipping the one line you want to delete.
There is no generic delete-a-line-from-file function, as far as I know.

One way to do it if the file is not very big is to load all the lines into an array:
string[] lines = File.ReadAllLines("filename.txt");
string[] newLines = RemoveUnnecessaryLine(lines);
File.WriteAllLines("filename.txt", newLines);

Hope this simple and short code will help.
List linesList = File.ReadAllLines("myFile.txt").ToList();
linesList.RemoveAt(0);
File.WriteAllLines("myFile.txt"), linesList.ToArray());
OR use this
public void DeleteLinesFromFile(string strLineToDelete)
{
string strFilePath = "Provide the path of the text file";
string strSearchText = strLineToDelete;
string strOldText;
string n = "";
StreamReader sr = File.OpenText(strFilePath);
while ((strOldText = sr.ReadLine()) != null)
{
if (!strOldText.Contains(strSearchText))
{
n += strOldText + Environment.NewLine;
}
}
sr.Close();
File.WriteAllText(strFilePath, n);
}

You can actually use C# generics for this to make it real easy:
var file = new List<string>(System.IO.File.ReadAllLines("C:\\path"));
file.RemoveAt(12);
File.WriteAllLines("C:\\path", file.ToArray());

This can be done in three steps:
// 1. Read the content of the file
string[] readText = File.ReadAllLines(path);
// 2. Empty the file
File.WriteAllText(path, String.Empty);
// 3. Fill up again, but without the deleted line
using (StreamWriter writer = new StreamWriter(path))
{
foreach (string s in readText)
{
if (!s.Equals(lineToBeRemoved))
{
writer.WriteLine(s);
}
}
}

Read and remember each line
Identify the one you want to get rid
of
Forget that one
Write the rest back over the top of
the file

I cared about the file's original end line characters ("\n" or "\r\n") and wanted to maintain them in the output file (not overwrite them with what ever the current environment's char(s) are like the other answers appear to do). So I wrote my own method to read a line without removing the end line chars then used it in my DeleteLines method (I wanted the option to delete multiple lines, hence the use of a collection of line numbers to delete).
DeleteLines was implemented as a FileInfo extension and ReadLineKeepNewLineChars a StreamReader extension (but obviously you don't have to keep it that way).
public static class FileInfoExtensions
{
public static FileInfo DeleteLines(this FileInfo source, ICollection<int> lineNumbers, string targetFilePath)
{
var lineCount = 1;
using (var streamReader = new StreamReader(source.FullName))
{
using (var streamWriter = new StreamWriter(targetFilePath))
{
string line;
while ((line = streamReader.ReadLineKeepNewLineChars()) != null)
{
if (!lineNumbers.Contains(lineCount))
{
streamWriter.Write(line);
}
lineCount++;
}
}
}
return new FileInfo(targetFilePath);
}
}
public static class StreamReaderExtensions
{
private const char EndOfFile = '\uffff';
/// <summary>
/// Reads a line, similar to ReadLine method, but keeps any
/// new line characters (e.g. "\r\n" or "\n").
/// </summary>
public static string ReadLineKeepNewLineChars(this StreamReader source)
{
if (source == null)
throw new ArgumentNullException(nameof(source));
char ch = (char)source.Read();
if (ch == EndOfFile)
return null;
var sb = new StringBuilder();
while (ch != EndOfFile)
{
sb.Append(ch);
if (ch == '\n')
break;
ch = (char)source.Read();
}
return sb.ToString();
}
}

Are you on a Unix operating system?
You can do this with the "sed" stream editor. Read the man page for "sed"

What?
Use file open, seek position then stream erase line using null.
Gotch it? Simple,stream,no array that eat memory,fast.
This work on vb.. Example search line culture=id where culture are namevalue and id are value and we want to change it to culture=en
Fileopen(1, "text.ini")
dim line as string
dim currentpos as long
while true
line = lineinput(1)
dim namevalue() as string = split(line, "=")
if namevalue(0) = "line name value that i want to edit" then
currentpos = seek(1)
fileclose()
dim fs as filestream("test.ini", filemode.open)
dim sw as streamwriter(fs)
fs.seek(currentpos, seekorigin.begin)
sw.write(null)
sw.write(namevalue + "=" + newvalue)
sw.close()
fs.close()
exit while
end if
msgbox("org ternate jua bisa, no line found")
end while
that's all..use #d