Develop Reference

How to split a string with a certain character without considering the length of the character?

I'm trying to work on this string
abc
def
--------------
efg
hij
------
xyz
pqr
--------------
Now I have to split the string with the - character.
So far I'm first spliting the string in lines and then finding the occurrence of - and the replacing the line with a single *, then combining the whole string and splitting them again.
I'm trying to get the data as
string[] set =
{
"abc
def",
"efg
hij",
"xyz
pqr"
}
Is there a better way to do this?

var spitStrings = yourString.Split(new char[] { '-' }, StringSplitOptions.RemoveEmptyEntries);
If i understand your question, this above code solves it.

Use of string split function using the specific char or string of chars (here -) can be used.
The output will be array of strings. Then choose whichever strings you want.
Example:
http://www.dotnetperls.com/split

I'm confused with exactly what you're asking, but won't this work?
string[] seta =
{
"abc\ndef",
"efg\nhij",
"xyz\npqr"
}
\n = CR (Carriage Return) // Used as a new line character in Unix
\r = LF (Line Feed) // Used as a new line character in Mac OS
\n\r = CR + LF // Used as a new line character in Windows
(char)13 = \n = CR // Same as \n
If I'm understanding your question about splitting -'s then the following should work.
string s = "abc-def-efg-hij-xyz-pqr"; // example?
string[] letters = s.Split(new char[] { '-' }, StringSplitOptions.RemoveEmptyEntries);
If this is what your array looks like at the moment, then you can loop through it as follows:
string[] seta = {
"abc-def",
"efg-hij",
"xyz-pqr"
};
foreach (var letter in seta)
{
string[] letters = letter.Split(new char[] { '-' }, StringSplitOptions.RemoveEmptyEntries);
// do something with letters?
}

I'm sure this below code will help you...
string m = "adasd------asdasd---asdasdsad-------asdasd------adsadasd---asdasd---asdadadad-asdadsa-asdada-s---adadasd-adsd";
var array = m.Split('-');
List<string> myCollection = new List<string>();
if (array.Length > 0)
{
foreach (string item in array)
{
if (item != "")
{
myCollection.Add(item);
}
}
}
string[] str = myCollection.ToArray();
if it does then don't forget to mark my answer thanks....;)

string set = "abc----def----------------efg----hij--xyz-------pqr" ;
var spitStrings = set.Split(new char[]{'-'},StringSplitOptions.RemoveEmptyEntries);
EDIT -
He wants to split the strings no matter how many '-' are there.
var spitStrings = set.Split(new char[]{'-'},StringSplitOptions.RemoveEmptyEntries);
This will do the work.

How would I split TO extract spaces in C#

Split or Regex.Split is used to extract the word in a sentence(s) and store them in array. I instead would like to extract the spaces in a sentence(s) and store them in array (it is possible that this sentence contains multiple spaces). Is there easy way of doing it? I first tried to split it normally, and then use string.split(theSplittedStrings, StringSplitOptions.RemoveEmptyEntries) however, that did not preserve the amount of spaces that exists.
---------- EDIT -------------
for example. If there is a sentence "This is a test".
I would like to make an array of string { " ", " ", " "}.
---------- EDIT END ---------
Any helps are appreciated.
Thank you.

EDIT:
Based on your edited question, I believe you can do that with simple iteration like:
string str = "This is a test";
List<string> spaceList = new List<string>();
var temp = str.TakeWhile(char.IsWhiteSpace).ToList();
List<char> charList = new List<char>();
foreach (char c in str)
{
if (c == ' ')
{
charList.Add(c);
}
if (charList.Any() && c != ' ')
{
spaceList.Add(new string(charList.ToArray()));
charList = new List<char>();
}
}
That would give you spaces in different elements of List<string>, if you need an array back then you can call ToArray
(Old Answer)
You don't need string.Split. You can count the spaces in the string and then create array like:
int spaceCount = str.Count(r => r == ' ');
char[] array = Enumerable.Repeat<char>(' ', spaceCount).ToArray();
If you want to consider White-Space (Space, LineBreak, Tabs) as space then you can use:
int whiteSpaceCount = str.Count(char.IsWhiteSpace);

This code matches all spaces in the input string and outputs their indexes:
const string sentence = "This is a test sentence.";
MatchCollection matches = Regex.Matches(sentence, #"\s");
foreach (Match match in matches)
{
Console.WriteLine("Space at character {0}", match.Index);
}
This code retrieves all space groups as an array:
const string sentence = "This is a test sentence.";
string[] spaceGroups = Regex.Matches(sentence, #"\s+").Cast<Match>().Select(arg => arg.Value).ToArray();
In either case, you can look at the Match instances' Index property values to get the location of the space/space group in the string.

Losing characters in strings after performing a split with RegEx

I want to split a string into 2 strings,
my string looks like:
HAMAN*3 whitespaces*409991
I want to have two strings the first with 'HAMAN' and the second should contain '409991'
PROBLEM: My second string has '09991' instead of '409991' after implementing this code:
string str = "HAMAN 409991 ";
string[] result = Regex.Split(str, #"\s4");
foreach (var item in result)
{
MessageBox.Show(item.ToString());
}
CURRENT SOLUTION with PROBLEM:
Split my original string when I find whitespace followed by the number 4. The character '4' is missing in the second string.
PREFERED SOLUTION:
To split when I find 3 whitespaces followed by the digit 4. And have '4' mentioned in my second string.

Try this
string[] result = Regex.Split(str, #"\s{3,}(?=4)");
Here is the Demo

Positive lookahead is your friend:
Regex.Split(str, #"\s+(?=4)");

Or you could not use Regex:
var str = "HAMAN 409991 ";
var result = str.Split(new[] {' '}, StringSplitOptions.RemoveEmptyEntries);
EXAMPLE
Alternative if you need it to start with SPACESPACESPACE4:
var str = new[] {
"HAMAN 409991 ",
"HAMAN 409991",
"HAMAN 509991"
};
foreach (var s in str)
{
var result = s.Trim()
.Split(new[] {" "}, StringSplitOptions.RemoveEmptyEntries)
.Select(a => a.Trim())
.ToList();
if (result.Count != 2 || !result[1].StartsWith("4"))
continue;
Console.WriteLine("{0}, {1}", result[0], result[1]);
}

That's because you're splitting including the 4. If you want to split by three-consecutive-spaces then you should specify exactly that:
string[] result = Regex.Split(str, #"\s{3}");

c#: how to split string using default whitespaces + set of addtional delimiters?

I need to split a string in C# using a set of delimiter characters. This set should include the default whitespaces (i.e. what you effectively get when you String.Split(null, StringSplitOptions.RemoveEmptyEntries)) plus some additional characters that I specify like '.', ',', ';', etc. So if I have a char array of those additional characters, how to I add all the default whitespaces to it, in order to then feed that expanded array to String.Split? Or is there a better way of splitting using my custom delimiter set + whitespaces? Thx

Just use the appropriate overload of string.Split if you're at least on .NET 2.0:
char[] separator = new[] { ' ', '.', ',', ';' };
string[] parts = text.Split(separator, StringSplitOptions.RemoveEmptyEntries);
I guess i was downvoted because of the incomplete answer. OP has asked for a way to split by all white-spaces(which are 25 on my pc) but also by other delimiters:
public static class StringExtensions
{
static StringExtensions()
{
var whiteSpaceList = new List<char>();
for (int i = char.MinValue; i <= char.MaxValue; i++)
{
char c = Convert.ToChar(i);
if (char.IsWhiteSpace(c))
{
whiteSpaceList.Add(c);
}
}
WhiteSpaces = whiteSpaceList.ToArray();
}
public static readonly char[] WhiteSpaces;
public static string[] SplitWhiteSpacesAndMore(this string str, IEnumerable<char> otherDeleimiters, StringSplitOptions options = StringSplitOptions.None)
{
var separatorList = new List<char>(WhiteSpaces);
separatorList.AddRange(otherDeleimiters);
return str.Split(separatorList.ToArray(), options);
}
}
Now you can use this extension method in this way:
string str = "word1 word2\tword3.word4,word5;word6";
char[] separator = { '.', ',', ';' };
string[] split = str.SplitWhiteSpacesAndMore(separator, StringSplitOptions.RemoveEmptyEntries);

The answers above do not use all whitespace characters as delimiters, as you state in your request, only the ones specified by the program. In the solution examples above, this is only SPACE, but not TAB, CR, LF, and all the other Unicode-defined whitespace chars.
I have not found a way to retrieve the default whitespace chars from String. However, they are defined in Regex, and you can use that instead of String. In your case, adding period and comma to the Regex whitespace set:
Regex regex = new Regex(#"[\s\.,]+"); // The "+" will remove blank entries
input = #"1.2 3, 4";
string[] tokens = regex.Split(input);
will produce
tokens[0] "1"
tokens[1] "2"
tokens[2] "3"
tokens[3] "4"

str.Split(" .,;".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);

I use something like the following to ensure I'm always splitting on Split's default whitespace characters:
public static string[] SplitOnWhitespaceAnd(this string value,
char[] separator, StringSplitOptions options = StringSplitOptions.RemoveEmptyEntries)
=> value.Split().SelectMany(s => s.Split(separator, options)).ToArray();
Note that to be consistent with Microsoft's naming conventions, you'd want to use WhiteSpace rather than Whitespace.
Refer to Microsoft's Char.IsWhiteSpace documentation to see the whitespace characters split on by default.

string[] splitSentence(string sentence)
{
return sentence
.Replace(",", " , ")
.Replace(".", " . ")
.Split(' ', StringSplitOptions.RemoveEmptyEntries)
}
or
string[] result = test.Split(new string[] {"\n", "\r\n"},
StringSplitOptions.RemoveEmptyEntries);

Split a string by word using one of any or all delimiters?

I may have just hit the point where i;m overthinking it, but I'm wondering: is there a way to designate a list of special characters that should all be considered delimiters, then splitting a string using that list? Example:
"battlestar.galactica-season 1"
should be returned as
battlestar galactica season 1
i'm thinking regex but i'm kinda flustered at the moment, been staring at it for too long.
EDIT:
Thanks guys for confirming my suspicion that i was overthinking it lol: here is what i ended up with:
//remove the delimiter
string[] tempString = fileTitle.Split(#"\/.-<>".ToCharArray());
fileTitle = "";
foreach (string part in tempString)
{
fileTitle += part + " ";
}
return fileTitle;
I suppose i could just replace delimiters with " " spaces as well... i will select an answer as soon as the timer is up!

The built-in String.Split method can take a collection of characters as delimiters.
string s = "battlestar.galactica-season 1";
string[] words = s.split('.', '-');

The standard split method does that for you. It takes an array of characters:
public string[] Split(
params char[] separator
)

You can just call an overload of split:
myString.Split(new char[] { '.', '-', ' ' }, StringSplitOptions.RemoveEmptyEntries);
The char array is a list of delimiters to split on.

"battlestar.galactica-season 1".Split(new string[] { ".", "-" }, StringSplitOptions.RemoveEmptyEntries);

This may not be complete but something like this.
string value = "battlestar.galactica-season 1"
char[] delimiters = new char[] { '\r', '\n', '.', '-' };
string[] parts = value.Split(delimiters,
StringSplitOptions.RemoveEmptyEntries);
for (int i = 0; i < parts.Length; i++)
{
Console.WriteLine(parts[i]);
}

Are you trying to split the string (make multiple strings) or do you just want to replace the special characters with a space as your example might also suggest (make 1 altered string).
For the first option just see the other answers :)
If you want to replace you could use
string title = "battlestar.galactica-season 1".Replace('.', ' ').Replace('-', ' ');

For more information split with easy examples you may see following Url:
This also include split on words (multiple chars).
C# Split Function explained