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Split string from text file

I'm trying to convert string to keys from a text file and I need to split text.
For example:
Code c#
string[] controls = File.ReadAllLines(FilePath);
Keys move up = (Keys)Enum.Parse(type of(Keys),controls[1].Split("|", StringSplitOption.None), true);
In the text file at the line[1] I have :
moveUp |W;
I want to set the char W as keys.
Thanks to reply and sorry if my English looks weird.

If you are interested in string after | , then this should be:
controls[1].Split("|", StringSplitOption.None)
replaced with this:
controls[1].Split("|")[1]
[1] means return the 2nd index value from array which will be created by Split()
If you are trying to get from Line 1 then controls[1] should be controls[0] because arrays are zero index based.

How to count the text file which split with newline character

I have a file text which splited by newline character. the text file such this:
merah.dc
kuning.dc
hijau.dc
biru.dc
orange.dc
mahopermanent.dc
I want to count them by splitting with a newline character. so, the count of them are 6. I could only do this with looping:
int count = 0;
string path = "directory\\admin.txt";
StreamReader moco = File.OpenText(path);
string s;
while ((s = moco.ReadLine())!= null)
{
count++;
}
I want to count them with a simple way like the PHP syntax:
<?php
$file = file("directory\\admin.txt");
$count = count($file);
echo $count;
?>
The above syntax able to counts them without looping. Just use file() and count(). is any function in C# which equals with that function ?

You can use ReadLines without loading whole file into the memory (of course this method can be useful if your file is large)
int count = File.ReadLines(filename).Count();

Step 1 : You can use ReadAllLines() function to get all Lines from the given file path as a String Array.
Step 2: you can invoke Length property on the obtained String Array to get the Count of Total Lines
Try This:
using System.IO;
String [] allLines=File.ReadAllLines(#"directory\admin.txt");
int length=allLines.Length;

You don't need to split them by a new character, use File.ReadAllLines (which returns an array of strins, each element is a line).
int lineCount = File.ReadAllLines("test.txt").Length;
If you want to use split, then:
int lineCount = File.ReadAllText("test.txt").Split('\n').Count();
ReadAllText returns a strin with the entire content of the file.

int count = File.ReadAllLines(#"directory\\admin.txt").Length;

You can Split() the textfile
StreamReader moco = File.OpenText(path);
string s;
string splitArray[] = s.Split('\n'); //Split on newline
int length = splitArray[].Length;

Split a string at 2 points

I have a file called file_test1.txt and I want to extract just test1 from the name and place it in a string. Whats the best way of doing this?
E.g.
string fullfile = #"C:\file_test1.txt";
string section = [test1] from fullfile; // <- expected result
I want to be able to split on 'file_' and '.txt' as the 'test1' section could be larger or smaller however the 'file_' and '.txt' will always be the same.

Try Path.GetFileNameWithoutExtension(fullfile).Substring(5) (or Substring("TEMPLATE_PREFIX".Length))

You can try spilt
var test = Path.GetFileNameWithoutExtension(fullfile).split('_')[1];

Try following
string fullfile = #"C:\file_test1.txt";
var name = fullfile.Substring(8,fullfile.Length-12)
As c:\file_ and .txt are fixed, You can take Substring starting at index 8 (skip leading name), upto length of total string length - 12 (12 => length of leading name, and trailing extension)

Thought I'd give a solution that uses Split and handles files with multiple underscores:
string.Join("_", Path.GetFileNameWithoutExtension(file).Split('_').Skip(1));

String.Split() works quite well for my uses:
http://msdn.microsoft.com/en-us/library/b873y76a.aspx

Obviously many ways to accomplish this. Here's yet another approach:
string fullfile = #"C:\file_test1.txt";
int index1 = fullfile.LastIndexOf("file_");
if (index1 != -1)
{
int index2 = fullfile.IndexOf(".", index1);
if (index2 != -1)
{
string section = fullfile.Substring(index1 + 5, index2 - index1 - 5);
}
}

You could also get "test1", or any subsequent filename (assuming your file naming convention remains constant!) using this regular expression:
var defaultRegex = new Regex(#"(?<=_).*(?=.txt)");
var matches = defaultRegex.Matches(fullfile);
var match = matches[0].Value;
The regular expression:
(?<=_).*(?=.txt)
uses positive look behind to find text preceded by '_', and also positive lookahead to find text which has '.txt' ahead of it.

How to check if a position in a string is empty in c#

I have strings with space seperated values and I would like to pick up from a certain index to another and save it in a variable. The strings are as follows:
John Doe Villa Grazia 323334I
I managed to store the id card (3rd column) by using:
if (line.length > 39)
{
idCard = line.Substring(39, 46);
}
However, if I store the name and address (1st and 2nd columns) with Substring there will be empty spaces since they are not of the same length (unlike the id cards). How can I store these 2 values and removing the unneccasry spaces BUT allowing the spaces between name and surname?

Try this:
string line = " John Doe Villa Grazia 323334I";
string name = line.Substring(02, 16).Trim();
string address = line.Substring(18, 23).Trim();
string id = line.Substring(41, 07).Trim();

var values = line.Split(' ');
string name = values[0] + " " + values[1];
string idCard = values[4];
It will be impossible to do without database lookups on names if there aren't spaces for sure in the previous columns.

Are these actually space separated or are they really fix width columns?
By that I mean do the "columns" start at the same index into the string in each case - from the way you're describing the data is sounds like the later i.e. the ID column is always column 39 for 7 characters.
In which case you need to a) pull the columns using the appropriate substring calls as you're already doing and then, use "string ".Trim() to cut off the spaces.
If the rows, are, as it seems fixed with then you don't want to use Split at all.

How can you even get the ID like that, when everything in front of it is of variable length? If that was used for my name, "David Hedlund 323334I", the ID would start at pos 14, not 39.
Try this more dynamic approach:
var name = str.Substring(0, str.LastIndexOf(" "));
var id = str.Substring(str.LastIndexOf(" ")+1);

Looks like your parsing strategy will cause you a lot of trouble. You shouldn't count on the string's size in order to parse it.
Why not save the data in CSV format (John Doe, Villa Grazia, 323334I)?
that way, you can assume that each "column" will be separated by a comma which will make your parsing efforts easier.

Possible "DOH!" question but are you sure they are spaces and not Tabs? Looks like it "could" be a tab seperated file?
Also for browie points you should use String.Empty instead of ' ' for comparisons, its more localisation and memory friendly apparently.

The first approach would be - as already mentioned - a CSV-like structure with a defined token as the field separator.
The second one would be fixed field lengths so you know the first column goes from char 1 to char 20, the second column from char 21 to char 30, and so on.
There is nothing bad about this concept besides that the human readability may be poor if the columns are filled up to their maximum so no spaces remain between them.
You could write a helper function or class which knows about the field lengths and provides an index-based, fault-tolerant access to the particular column. This function would extract the particular string parts and remove the leading and trailing spaces but leave the spaces in between as they are.

If your values have fixed width, best not split it but use the right indexes in your array.
const string input = "John Doe Villa Grazia 323334I";
var name = input.Substring(0, 15).TrimEnd();
var place = input.Substring(16, 38).TrimEnd();
var cardId = input.Substring(39).TrimEnd();
Assuming your values cannot contain two sequential spaces in them we can maybe use " " (double space" as a separator?
The following code will split your string based on the double space
const string input = "John Doe Villa Grazia 323334I";
var entries = input.Split(new[]{" "}, StringSplitOptions.RemoveEmptyEntries)
.Select(s=>s.Trim()).ToArray();
string name = entries[0];
string place = entries[1];
string idCard = entries[2];

Trim all chars off file name after first "_"

I'd like to trim these purchase order file names (a few examples below) so that everything after the first "_" is omitted.
INCOLOR_fc06_NEW.pdf
Keep: INCOLOR (write this to db as the VendorID) Remove: _fc08_NEW.pdf
NORTHSTAR_sc09.xls
Keep: NORTHSTAR (write this to db as the VendorID) Remove: _sc09.xls
Our scenario: The managers are uploading these files to our Intranet web server, to make them available to download/view ect. I'm using Brettles NeatUpload, and for each file uploaded, am writing the files attributes into the PO table (sql 2000). The first part of the file name will be written to the DB as a VendorID.
The naming convention for these files is consistent in that the the first part of the file is always the vendor name (or Vendor ID) followed by an "_" then other unpredictable chars used to identify the type of Purchase Order then the file extention - which is consistently either .xls, .XLS, .PDF, or .pdf.
I tried TrimEnd - but the array of chars that you have to provide ends up being long and can conflict with the part of the file name I want to keep. I have a feeling I'm not using TrimEnd properly.
What is the best way to use string.TrimEnd (or any other string manipulation in C#) that will strip off all chars after the first "_" ?

String s = "INCOLOR_fc06_NEW.pdf";
int index = s.IndexOf("_");
return index >= 0 ? s.Substring(0,index) : s;

I'll probably offend the anti-regex lobby, but here I go (ducking):
string stripped = Regex.Replace(filename, #"(?<=[^_]*)_.*",String.Empty);
This code will strip all extra characters after the first '_', unless there is no '_' in the string (then it will just return the original string).
It's one line of code. It's slower than the more elaborate IndexOf() algorithm, but when used in a non-performance-sensitive part of the code, it's a good solution.
Get your flame-throwers out...

TrimEnd removes white spaces and punctuation marks at the end of the String, it won't help you here. Read more about TrimEnd here:
http://msdn.microsoft.com/en-us/library/system.string.trimend.aspx
Bnaffas code (with a small tweak):
String fileName = "INCOLOR_fc06_NEW.pdf";
int index = fileName.IndexOf("_");
return index >= 0 ? fileName.Substring(0, index) : fileName;
If you want to do something with the other parts, you could use a Split
string fileName = "INCOLOR_fc06_NEW.pdf";
string[] parts = fileName.Split('_');

public string StripOffStuff(string sInput)
{
int iIndex = sInput.IndexOf("_");
return (iIndex > 0) ? sInput.Substring(0, iIndex) : sInput;
}
// Call it like:
string sNewString = StripOffStuff("INCOLOR_fc06_NEW.pdf");

I would go with the SubString approach but to round out the available solutions here's a LINQ approach just for fun:
string filename = "INCOLOR_fc06_NEW.pdf";
string result = new string(filename.TakeWhile(c => c != '_').ToArray());
It'll return the original string if no underscore is found.

To go with all the "alternative" solutions, here's the second one that I thought of (after substring):
string filename = "INCOLOR_fc06_NEW.pdf";
string stripped = filename.Split('_')[0];