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SSIS remove carriage returns

I've a flat file which has 48 columns. The columns are tab delimited and the rows CR-LF (return).
Now I've the problem that there is a column which sometimes contains carriage returns and there is no possibility to change the file before the import process.
At the moment I wrote a C# script task which looks in every row, counts the tabs and when there is a return and the counted tabs are not divisible by 48 it deletes the return. This way works but it's to slow because my files are very big and with that way I've to read every character in the file.
Does someone knows a better way to get rid of these carriage returns?
Cheers!

https://community.spiceworks.com/topic/2130093-ssis-package-flat-file-destination-blank-row-at-end-of-file
public void Main()
{
string filename = #"C:\Temp\Gerard.txt";
string fileinfo = "";
string curline = "";
TextReader tr = new StreamReader(filename);
while ((curline = tr.ReadLine()) != null)
{
if (fileinfo != "")
{
fileinfo = fileinfo + Environment.NewLine;
}
fileinfo = fileinfo + curline;
}
tr.Close();
TextWriter tw = new StreamWriter(filename, false);
tw.Write(fileinfo);
tw.Close();
Dts.TaskResult = (int)ScriptResults.Success;
}

StreamWriter replace line with a new text

Is it possible to replace the text in a text file with a new text without erasing the other data, here is my sample code, but its not working, I know there's a problem with it but I can't figure out, thanks,
private void button1_Click_1(object sender, EventArgs e)
{
StreamReader sr = new StreamReader("test10101.txt");
List<string> lines = new List<string>();
while (!sr.EndOfStream)
lines.Add(sr.ReadLine());
output = Convert.ToInt32(textBox1.Text);
newbal = Convert.ToInt32(lines[0]) - output;
MessageBox.Show("Please get your cash....\n\nYour new balance is: $" + newbal);
sr.Close();
{
string linetoreplace = lines[0];
int newlinevalue = newbal;
string contents = sr.ReadToEnd();
StreamWriter sw = new StreamWriter("test10101.txt" + ".tmp");
//contents = Regex.Replace(contents, linetoreplace, newlinevalue.ToString());
contents = contents.Replace(linetoreplace, newlinevalue.ToString());
sw.WriteLine(contents);
sw.Close();
}
I'm wondering if I use the Regex or directly replace the line,

You could do it a lot more easily:
string[] lines = System.IO.File.ReadAllLines("test");
lines[0] = /* replace with whatever you need */
System.IO.File.WriteAllLines("test", lines);
hope this helps
also I'd suggest using int.TryParse if you don't want an exception to be raised in your portion of code in case the first line of the file or the textbox values aren't numeric
if you really want to use the streamwriter you could go with this, also a simpler way:
line[0] = newbal.ToString();
foreach(string s in lines)
sw.WriteLine(s);

how to change a line in a txt-document with C#

I'm having a problem here. I have a .txt-file where one line contains "message", this is the line I wanna change. But I can't get this code to work, anyone that can help me?
I have this code here that is working for only replacing a string, but I don't know how to do it so it changes the whole line.
public void t()
{
string filename = #"F:\test\test.txt";
StringBuilder result = new StringBuilder();
if (System.IO.File.Exists(filename))
{
using (StreamReader streamReader = new StreamReader(filename))
{
String line;
while ((line = streamReader.ReadLine()) != null)
{
string newLine = String.Concat(line, Environment.NewLine);
newLine = newLine.Replace("message", "HEJHEJ ");
result.Append(newLine);
}
}
}
using (FileStream fileStream = new FileStream(filename, FileMode.Open, FileAccess.ReadWrite))
{
StreamWriter streamWriter = new StreamWriter(fileStream);
streamWriter.Write(result);
streamWriter.Close();
fileStream.Close();
}
}
This code is changeing "" to "HEJHEJ", but I want to whole line in the txt-document to change to "HEJHEJ", not just only the "message" part

How about changing this:
string newLine = String.Concat(line, Environment.NewLine);
newLine = newLine.Replace("message", "HEJHEJ ");
result.Append(newLine);
to this:
string newLine;
if (line.Contains("message")) {
newLine = String.Concat("HEJHEJ ", Environment.NewLine);
}
else {
newLine = String.Concat(line, Environment.NewLine);
}
result.Append(newLine);
There's a lot cleaner ways to do this, of course.

I have my txt-document with the line:
message helloworld
with your code this line changes into:
HEJHEJ
elloworld
//I would like it to be:
HEJHEJ
So in the end, i want it to change/replace to whole line of text that contains "message"

File cannot be accessed because it is being used by another program

I am trying to remove the space at the end of line and then that line will be written in another file.
But when the program reaches to FileWriter then it gives me the following error
Process can't be accessed because it is being used by another process.
The Code is as below.
private void FrmCounter_Load(object sender, EventArgs e)
{
string[] filePaths = Directory.GetFiles(#"D:\abc", "*.txt", SearchOption.AllDirectories);
string activeDir = #"D:\dest";
System.IO.StreamWriter fw;
string result;
foreach (string file in filePaths)
{
result = Path.GetFileName(file);
System.IO.StreamReader f = new StreamReader(file);
string newFileName = result;
// Combine the new file name with the path
string newPath = System.IO.Path.Combine(activeDir, newFileName);
File.Create(newPath);
fw = new StreamWriter(newPath);
int counter = 0;
int spaceAtEnd = 0;
string line;
// Read the file and display it line by line.
while ((line = f.ReadLine()) != null)
{
if (line.EndsWith(" "))
{
spaceAtEnd++;
line = line.Substring(0, line.Length - 1);
}
fw.WriteLine(line);
fw.Flush();
counter++;
}
MessageBox.Show("File Name : " + result);
MessageBox.Show("Total Space at end : " + spaceAtEnd.ToString());
f.Close();
fw.Close();
}
}

File.Create itself returns a stream.
Use that stream to write file. Reason you are receiving this error is because Stream returned by File.Create is open and you are trying to open that file again for write.
Either close the stream returned by File.Create or better use that stream for file write or use
Stream newFile = File.Create(newPath);
fw = new StreamWriter(newFile);

Even though you solved your initial problem, if you want to write everything into a new file in the original location, you can try to read all of the data into an array and close the original StreamReader. Performance note: If your file is sufficiently large though, this option is not going to be the best for performance.
And you don't need File.Create as the StreamWriter will create a file if it doesn't exist, or overwrite it by default or if you specify the append parameter as false.
result = Path.GetFileName(file);
String[] f = File.ReadAllLines(file); // major change here...
// now f is an array containing all lines
// instead of a stream reader
using(var fw = new StreamWriter(result, false))
{
int counter = f.Length; // you aren't using counter anywhere, so I don't know if
// it is needed, but now you can just access the `Length`
// property of the array and get the length without a
// counter
int spaceAtEnd = 0;
// Read the file and display it line by line.
foreach (var item in f)
{
var line = item;
if (line.EndsWith(" "))
{
spaceAtEnd++;
line = line.Substring(0, line.Length - 1);
}
fw.WriteLine(line);
fw.Flush();
}
}
MessageBox.Show("File Name : " + result);
MessageBox.Show("Total Space at end : " + spaceAtEnd.ToString());
Also, you will not remove multiple spaces from the end of the line using this method. If you need to do that, consider replacing line = line.Substring(0, line.Length - 1); with line = line.TrimEnd(' ');

You have to close any files you are reading before you attempt to write to them in your case.

Write stream in using statement like:
using (System.IO.StreamReader f = new StreamReader(file))
{
//your code goes here
}

EDIT:
Zafar is correct, however, maybe this will clear things up.
Because File.Create returns a stream.. that stream has opened your destination file. This will make things clearer:
File.Create(newPath).Close();
Using the above line, makes it work, however, I would suggest re-writing that properly. This is just for illustrative purposes.

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