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How would I access a txt file and split the links

Alright, I have a program that grabs links off of a website and puts it into a txt BUT the links aren't separated onto their own lines and I need to somehow do that without having to manually do it myself, here is the code used to grab the links off of the website, write the links to a text file then grab the txt file and read it.
private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
{
var client = new WebClient();
string text = client.DownloadString("https://currentlinks.com");
File.WriteAllText("C:/ProgramData/oof.txt", text);
string searchKeyword = "https://foobar.to/showthread.php";
string fileName = "C:/ProgramData/oof.txt";
string[] textLines = File.ReadAllLines(fileName);
List<string> results = new List<string>();
foreach (string line in textLines)
{
if (line.Contains(searchKeyword))
{
results.Add(line);
}
var sb = new StringBuilder();
foreach (var item in results)
{
sb.Append(item);
}
textBox1.Text = sb.ToString();
var parsed = textBox1;
TextWriter tw = new StreamWriter("C:/ProgramData/parsed.txt");
// write lines of text to the file
tw.WriteLine(parsed);
// close the stream
tw.Close();
}
}

You are getting all the Links (URLs) in one single string. There is not straight forward way to get all the URLs individually without some assumptions.
With the sample data you shared, I assume that the URLs in the string follow simple URLs format and do not have any fancy stuff in it. They start with http and one url does not have any other http.
With above assumptions, I suggest following code.
// Sample data as shared by the OP
string data = "https://forum.to/showthread.php?tid=22305https://forum.to/showthread.php?tid=22405https://forum.to/showthread.php?tid=22318";
//Splitting the string by string `http`
var items = data.Split(new [] {"http"},StringSplitOptions.RemoveEmptyEntries).ToList();
//At this point all the strings in items collection will be without "http" at the start.
//So they will look like as following.
// s://forum.to/showthread.php?tid=22305
// s://forum.to/showthread.php?tid=22405
// s://forum.to/showthread.php?tid=22318
//So we need to add "http" at the start of each of the item as following.
items = items.Select(i => "http" + i).ToList();
// After this they will become like following.
// https://forum.to/showthread.php?tid=22305
// https://forum.to/showthread.php?tid=22405
// https://forum.to/showthread.php?tid=22318
//Now we need to create a single string with newline character between two items so
//that they represent a single line individually.
var text = String.Join("\r\n", items);
// Then write the text to the file.
File.WriteAllText("C:/ProgramData/oof.txt", text);
This should help you resolve your issue.

.Split way
Could you use yourString.Split("https://");?
Example:
//This simple example assumes that all links are https (not http)
string contents = "https://www.example.com/dogs/poodles/poodle1.htmlhttps://www.example.com/dogs/poodles/poodle2.html";
const string Prefix = "https://";
var linksWithoutPrefix = contents.Split(Prefix, StringSplitOptions.RemoveEmptyEntries);
//using System.Linq
var linksWithPrefix = linksWithoutPrefix.Select(l => Prefix + l);
foreach (var match in linksWithPrefix)
{
Console.WriteLine(match);
}
Regex way
Another option is to use reg exp.
Failed - cannot find/write the right regex ... got to go now
string contents = "http://www.example.com/dogs/poodles/poodle1.htmlhttp://www.example.com/dogs/poodles/poodle2.html";
//From https://regexr.com/
var rgx = new Regex(#"(?<Protocol>\w+):\/\/(?<Domain>[\w#][\w.:#]+)\/?[\w\.?=%&=\-#/$,]*");
var matches = rgx.Matches(contents);
foreach(var match in matches )
{
Console.WriteLine(match);
}
//This finds 'http://www.example.com/dogs/poodles/poodle1.htmlhttp' (note the htmlhttp at the end

Get only first column values from CSV rows using CSVHelper

I am trying to parse a CSV file and extract the first string in each line, or the first column as it is laid out in MS Excel.
I am using CsvParser with the Read() method returning a string[] to the row variable.
The problem is, it is returning every single value, so my out looks like this for each line:
20070330 00:00 // This is the value I want to reference
0.9312
0.9352
0.9298
0.9343
How can I reference only the values at these positions in the file without putting in a counter to skip the interim values?
using (TextReader reader = File.OpenText(folder))
{
var datesInCsv = new List<string>();
var parsedCsv = new CsvParser(reader);
while (true)
{
var row = parsedCsv.Read();
if (row.IsNullOrEmpty())
{
break;
}
foreach (var date in row)
{
Console.WriteLine(date);
}
Console.ReadLine();
}
}

The CsvHelper library you are using requires you pass a CsvConfiguration instance when you build the instance of a CsvParse class. This is important to let the library understand and correctly parse your line
The most important thing to give is the value for the Delimiter property. In other words the character used to separate one field from the next one.
You should look at your CSV file and put the appropriate value below.
(For this example I have used the semicolon but change it according to your file)
Looking at you code I think also that the configuration SkipEmptyRecords could be used to simplify the code.
using (TextReader reader = File.OpenText(folder))
{
var datesInCsv = new List<string>();
CsvConfiguration config = new CsvConfiguration();
config.Delimiter = ";";
config.SkipEmptyRecords = true;
var parsedCsv = new CsvParser(reader, config);
string[] row = null;
while ((row = parsedCsv.Read()) != null)
{
// This IsNullOrEmpty doesn't exist according
// to Intellisense and the compiler.
// if(row.IsNullOrEmpty)
// At this point the row is an array of strings where the first
// element is the value you are searching for. No need of loops
Console.WriteLine(row[0]);
Console.ReadLine();
}
}
The Read method of the CsvParser instance returns an array of strings after splitting the input line accordingly to your delimiter. At this point you just need to reference the first element of the array without any loop.

You are explicitly printing every value to the console here:
foreach (var date in row)
{
Console.WriteLine(date);
}
This foreach loop iterates over all elemtens of the current row and print them.
Replace the loop with this, which will only print the first element (index 0):
Console.WriteLine(row[0]);
Of course, this can fail if the line was empty, so you need to check for that, too.

You need to "read" the records and pass the argument of the "mapping" you want. Either by index or name.
See here at each section detailed above:
https://joshclose.github.io/CsvHelper/

Retrieving a Single File and the Behavior of Directory.GetFiles C#

public int RunStageData(string rootDirectory, stringdataFolder)
{
string[] files = new string[] { };
files = Directory.GetFiles(rootDirectory + dataFolder);
string[] tableOrder = new string[] { };
tableOrder = Directory.GetFiles(#"C:\_projects\ExampleProject\src", "TableOrder.txt");
System.IO.StreamReader tableOrderReader = new System.IO.StreamReader(tableOrder[0]);
for (int count = 0; count < files.Length; count++)
{
string currentTableName =tableOrderReader.ReadLine();
//files[count] = Directory.GetFiles(#"C:\_projects\ExampleProject\src", currentTableName);
}
}
Hi everyone, sorry if my code is a bit sloppy. I'm having an issue primarily with the line I have commented out. So basically what I'm trying to do here is to populate a string array of file names based on the ordering of these names in a txt file. So I read the first line from the txt file, then retrieve the name of that file in the directory(assuming it exists) and put it in the first spot of the array, then move on.
For Example if the txt file had these words in the following order:
Dog
Sheep
Cat
I would want the array to have Dog first, then Sheep, then Cat. My issue is that the line that I have commented gives me an error that says "Error 41 Cannot implicitly convert type 'string[]' to 'string'"
I'm guessing the reason for this is that Directory.GetFiles has the possibility of returning multiple files. So, is there another method I could use to achieve the results I'm looking for? Thank you.

I am assuming you want the contents of the file (if you just want the file name and need to check for existance a different solution will be required).
files[count] = File.ReadAllText(Path.Combine(#"C:\_projects\ExampleProject\src", currentTableName));
And a couple other suggestions:
Don't initialize your variables with bogus data, = new string[] {} can be removed
Don't use count as an indexer, it is confusing (count is a property of the array after all)
Use Path.Combine when joining paths. It is much easier as it handles the \ for you.

From your question:
So basically what I'm trying to do here is to populate a string array
of file names based on the ordering of these names in a txt file. So I
read the first line from the txt file, then retrieve the name of that
file in the directory(assuming it exists) and put it in the first spot
of the array, then move on.
So, your TableOrder.txt already contains the files in the correct order, thus you can do:
string[] files = File.ReadAllLines(#"C:\_projects\ExampleProject\src\TableOrder.txt")

If your array files contains only paths, you can do it as:
path = #"C:\_projects\ExampleProject\src\" + currentTableName;
If(File.Exists(path))
{
files[count] = path;
}

read only given last x lines in txt file [duplicate]

This question already has answers here:
Get last 10 lines of very large text file > 10GB
(21 answers)
Closed 9 years ago.
Currently I'm reading file content using File.ReadAllText(), but now I need to read last x lines in my txt file. How can I do that?
content of myfile.txt
line1content
line2content
line3content
line4content
string contentOfLastTwoLines = ...

What about this
List <string> text = File.ReadLines("file.txt").Reverse().Take(2).ToList()

Use Queue<string> to store last X lines and replace the first one with currently read:
int x = 4; // number of lines you want to get
var buffor = new Queue<string>(x);
var file = new StreamReader("Input.txt");
while (!file.EndOfStream)
{
string line = file.ReadLine();
if (buffor.Count >= x)
buffor.Dequeue();
buffor.Enqueue(line);
}
string[] lastLines = buffor.ToArray();
string contentOfLastLines = String.Join(Environment.NewLine, lastLines);

You can use ReadLines to avoid reading the entire file into memory, like this:
const int neededLines = 5;
var lines = new List<String>();
foreach (var s in File.ReadLines("c:\\myfile.txt")) {
lines.Add(s);
if (lines.Count > neededLines) {
lines.RemoveAt(0);
}
}
Once the for loop is finished, the lines list contains up to the last neededLines of text from the file. Of course if the file does not contain as many lines as required, fewer lines will be placed in the lines list.

Read the lines into an array, then extract the last two:
string[] lines = File.ReadAllLines();
string last2 = lines[lines.Count-2] + Environment.NewLine + lines[lines.Count-1];
Assuming your file is reasonably small, it's easier to just read the whole thing and throw away what you don't need.

Since reading a file is done linearly, usually line-by-line. Simply read line-by-line and remember last two lines (you can use queue or something if you want... or just two string variables). When you get to EOF, you'll have your last two lines.

You want to read the file backwards using ReverseLineReader:
How to read a text file reversely with iterator in C#
Then run .Take(2) on it.
var lines = new ReverseLineReader(filename);
var last = lines.Take(2);
OR
Use a System.IO.StreamReader.
string line1, line2;
using(StreamReader reader = new StreamReader("myFile.txt")) {
line1 = reader.ReadLine();
line2 = reader.ReadLine();
}

Streamreader isn't returning the correct values from my text file, can't figure out how to properly read my text files C#

I'm running three counters, one to return the total amount of chars, one to return the number of '|' chars in my .txt file (total). And one to read how many separate lines are in my text file. I'm assuming my counters are wrong, I'm not sure. In my text file there are some extra '|' chars, but that is a bug I need to fix later...
The Message Boxes show
"Lines = 8"
"Entries = 8"
"Total Chars = 0"
Not sure if it helps but the .txt file is compiled using a streamwriter, and I have a datagridview saved to a string to create the output. Everything seems okay with those functions.
Here is a copy of the text file I'm reading
Matthew|Walker|MXW320|114282353|True|True|True
Audrey|Walker|AXW420|114282354|True|True|True
John|Doe|JXD020|111222333|True|True|False
||||||
And here is the code.
private void btnLoadList_Click(object sender, EventArgs e)
{
var loadDialog = new OpenFileDialog
{
InitialDirectory = Convert.ToString(Environment.SpecialFolder.MyDocuments),
Filter = "Text (*.txt)|*.txt",
FilterIndex = 1
};
if (loadDialog.ShowDialog() != DialogResult.OK) return;
using (new StreamReader(loadDialog.FileName))
{
var lines = File.ReadAllLines(loadDialog.FileName);//Array of all the lines in the text file
foreach (var assocStringer in lines)//For each assocStringer in lines (Runs 1 cycle for each line in the text file loaded)
{
var entries = assocStringer.Split('|'); // split the line into pieces (e.g. an array of "Matthew", "Walker", etc.)
var obj = (Associate) _bindingSource.AddNew();
if (obj == null) continue;
obj.FirstName = entries[0];
obj.LastName = entries[1];
obj.AssocId = entries[2];
obj.AssocRfid = entries[3];
obj.CanDoDiverts = entries[4];
obj.CanDoMhe = entries[5];
obj.CanDoLoading = entries[6];
}
}
}
Hope you guys find the bug(s) here. Sorry if the formatting is sloppy I'm self-taught, no classes. Any extra advice is welcomed, be as honest and harsh as need be, no feelings will be hurt.
In summary
Why is this program not reading the correct values from the text file I'm using?

Not totally sure I get exactly what you're trying to do, so correct me if I'm off, but if you're just trying to get the line count, pipe (|) count and character count for the file the following should get you that.
var lines = File.ReadAllLines(load_dialog.FileName);
int lineCount = lines.Count();
int totalChars = 0;
int totalPipes = 0; // number of "|" chars
foreach (var s in lines)
{
var entries = s.Split('|'); // split the line into pieces (e.g. an array of "Matthew", "Walker", etc.)
totalChars += s.Length; // add the number of chars on this line to the total
totalPipes = totalPipes + entries.Count() - 1; // there is always one more entry than pipes
}
All the Split() is doing is breaking the full line into an array of the individual fields in the string. Since you only seem to care about the number of pipes and not the fields, I'm not doing much with it other than determining the number of pipes by taking the number of fields and subtracting one (since you don't have a trailing pipe on each line).