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Get everything before dot or comma c#

how can I get a substring of everything before dot or comma?
For example:
string input = "2.1";
int charLocation = text.IndexOf(".", StringComparison.Ordinal);
string test = input.Substring(0, charLocation );
but what if I have an input = "2,1" ?
I would like to do it in one method, not using twice a substring (once for dot and once for comma)?

string test = input.Split(new Char[] { ',', '.' })[0];

This will split the string for either comma or period...
input.Split(',','.');

Use the IndexOfAny function. It allows you to specify a list of characters to look for, rather than just a single character. You could then make a substring up to the return value of that function.
e.g.
char[] chars = { '.', ',' }
String out = s.Substring(0,s.IndexOfAny(chars));

Split string into array that is enclosed in capturing parentheses

I have the following string in my project:
((1,01/31/2015)(1,Filepath)(1,name)(1,code)(1,String)(1, ))
I want to split this string into parts where i get the information within the capturing parentheses (for example 1,Filepath or (1,Filepath), but the whole string is in capturing parentheses too as you can see. The result i then try to put into array with string[] array = Regex.Split(originalString,SomeRegexHere)
Now i am wondering what would be the best approach be, just remove the first and last character of the string so i don't have the capturing parentheses enclosing the whole string, or is there some way to use Regular expressions on this to get the result i want to ?

string s = "((1,01/31/2015)(1,Filepath)(1,name)(1,code)(1,String)(1, ))";
var data = s.Split(new string[]{"(", ")"}, StringSplitOptions.RemoveEmptyEntries)
your Data would be then
["1,01/31/2015",
"1,Filepath",
"1,name",
"1,code",
"1,String",
"1,"]

You can create a substring without the first 2 and last 2 brackets and then split this on the enclosing brackets
var s = "((1,01/31/2015)(1,Filepath)(1,name)(1,code)(1,String)(1, ))";
var result = s.Substring(2, s.Length - 4)
.Split(new string[]{")("}, StringSplitOptions.RemoveEmptyEntries);
foreach(var r in result)
Console.WriteLine(r);
Output
1,01/31/2015
1,Filepath
1,name
1,code
1,String
1,
Example

(?<=\()[^()]*(?=\))
Just do a match and get your contents instead of splitting.See demo.
https://regex101.com/r/eS7gD7/15

Splitting on “,” but not “/,”

Question: How do I write an expression to split a string on ',' but not '/,'? Later I'll want to replace '/,' with ', '.
Details...
Delimiter: ','
Skip Char: '/'
Example input: "Mister,Bill,is,made,of/,clay"
I want to split this input into an array: {"Mister", "Bill", "is", "made", "of, clay"}
I know how to do this with a char prev, cur; and some indexers, but that seems beta.
Java Regex has a split functionality, but I don't know how to replicate this behavior in C#.
Note: This isn't a duplicate question, this is the same question but for a different language.

I believe you're looking for a negative lookbehind:
var regex = new Regex("(?<!/),");
var result = regex.Split(str);
this will split str on all commas that are not preceded by a slash. If you want to keep the '/,' in the string then this will work for you.
Since you said that you wanted to split the string and later replace the '/,' with ', ', you'll want to do the above first then you can iterate over the result and replace the strings like so:
var replacedResult = result.Select(s => s.Replace("/,", ", ");

string s = "Mister,Bill,is,made,of/,clay";
var arr = s.Replace("/,"," ").Split(',');
result : {"Mister", "Bill", "is", "made", "of clay"}

Using Regex:
var result = Regex.Split("Mister,Bill,is,made,of/,clay", "(?<=[^/]),");

Just use a Replace to remove the commas from your string :
s.Replace("/,", "//").Split(',').Select(x => x.Replace("//", ","));

You can use this in c#
string regex = #"(?:[^\/]),";
var match = Regex.Split("Mister,Bill,is,made,of/,clay", regex, RegexOptions.IgnoreCase);
After that you can replace /, and continue your operation as you like

Splitting a String into only 2 parts

I want to take a string from a textbox (txtFrom) and save the first word and save whatever is left in another part. (the whatever is left is everything past the first space)
Example string = "Bob jones went to the store"
array[0] would give "Bob"
array[1] would give "jones went to the store"
I know there is string[] array = txtFrom.Split(' '); , but that gives me an array of 6 with individual words.

Use String.Split(Char[], Int32) overload like this:
string[] array = txtFrom.Text.Split(new char[]{' '},2);
http://msdn.microsoft.com/en-us/library/c1bs0eda.aspx

You simply combine a split with a join to get the first element:
string[] items = source.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
string firstItem = items[0];
string remainingItems = string.Join(" ", items.Skip(1).ToList());
You simply take the first item and then reform the remainder back into a string.

char[] delimiterChars = { ' ', ',' };
string text = txtString.Text;
string[] words = text.Split(delimiterChars, 2);
txtString1.Text = words[0].ToString();
txtString2.Text = words[1].ToString();

There is an overload of the String.Split() method which takes an integer representing the number of substrings to return.
So your method call would become: string[] array = txtFrom.Text.Split(' ', 2);

You can also try RegularExpressions
Match M = System.Text.RegularExpressions.Regex.Match(source,"(.*?)\s(.*)");
M.Groups[1] //Bob
M.Groups[2] // jones went to the store
The regular expression matches everything up to the first space and stores it in the first group the ? mark tells it to make the smallest match possible. The second clause grabs everything after the space and stores it in the second group

string.split - by multiple character delimiter

i am having trouble splitting a string in c# with a delimiter of "][".
For example the string "abc][rfd][5][,][."
Should yield an array containing;
abc
rfd
5
,
.
But I cannot seem to get it to work, even if I try RegEx I cannot get a split on the delimiter.
EDIT: Essentially I wanted to resolve this issue without the need for a Regular Expression. The solution that I accept is;
string Delimiter = "][";
var Result[] = StringToSplit.Split(new[] { Delimiter }, StringSplitOptions.None);
I am glad to be able to resolve this split question.

To show both string.Split and Regex usage:
string input = "abc][rfd][5][,][.";
string[] parts1 = input.Split(new string[] { "][" }, StringSplitOptions.None);
string[] parts2 = Regex.Split(input, #"\]\[");

string tests = "abc][rfd][5][,][.";
string[] reslts = tests.Split(new char[] { ']', '[' }, StringSplitOptions.RemoveEmptyEntries);

Another option:
Replace the string delimiter with a single character, then split on that character.
string input = "abc][rfd][5][,][.";
string[] parts1 = input.Replace("][","-").Split('-');

Regex.Split("abc][rfd][5][,][.", #"\]\]");

More fast way using directly a no-string array but a string:
string[] StringSplit(string StringToSplit, string Delimitator)
{
return StringToSplit.Split(new[] { Delimitator }, StringSplitOptions.None);
}
StringSplit("E' una bella giornata oggi", "giornata");
/* Output
[0] "E' una bella giornata"
[1] " oggi"
*/

In .NETCore 2.0 and beyond, there is a Split overload that allows this:
string delimiter = "][";
var results = stringToSplit.Split(delimiter);
Split (netcore 2.0 version)