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Replace all Special Characters including space with - using C#

I want to replace all Special Characters which can't be parse in URL including space, double space or any big space with '-' using C#.
I don't want to use any Parse Method like System.Web.HttpUtility.UrlEncode.
How to do this ? I want to include any number of space between two words with just one '-'.
For example, if string is Hello# , how are you?
Then, Result should be, Hello-how-are-you, no '-' if last index is any special character or space.

string str = "Hello# , how are you?";
string newstr = "";
//Checks for last character is special charact
var regexItem = new Regex("[^a-zA-Z0-9_.]+");
//remove last character if its special
if (regexItem.IsMatch(str[str.Length - 1].ToString()))
{
newstr = str.Remove(str.Length - 1);
}
string replacestr = Regex.Replace(newstr, "[^a-zA-Z0-9_]+", "-");
INPUT:
Hello# , how are you?
OUTPUT:
Hello-how-are-you
EDIT:
Wrap it inside a class
public static class StringCheck
{
public static string Checker()
{
string str = "Hello# , how are you?";
string newstr = null;
var regexItem = new Regex("[^a-zA-Z0-9_.]+");
if (regexItem.IsMatch(str[str.Length - 1].ToString()))
{
newstr = str.Remove(str.Length - 1);
}
string replacestr = Regex.Replace(newstr, "[^a-zA-Z0-9_]+", "-");
return replacestr;
}
}
and call like this,
string Result = StringCheck.Checker();

string[] arr1 = new string[] { " ", "#", "&" };
newString = oldString;
foreach repl in arr1
{
newString= newString.Replace(repl, "-");
}
Of course you can add into an array all of your spec characters, and looping trough that, not only the " ".
More about the replace method at the following link

You need two steps to remove last special character and to replace all the remaining one or more special characters with _
public static void Main()
{
string str = "Hello# , how are you?";
string remove = Regex.Replace(str, #"[\W_]$", "");
string result = Regex.Replace(remove, #"[\W_]+", "-");
Console.WriteLine(result);
Console.ReadLine();
}
IDEONE

Trim a string in c# after special character

I want to trim a string after a special character..
Lets say the string is str="arjunmenon.uking". I want to get the characters after the . and ignore the rest. I.e the resultant string must be restr="uking".

How about:
string foo = str.EverythingAfter('.');
using:
public static string EverythingAfter(this string value, char c)
{
if(string.IsNullOrEmpty(value)) return value;
int idx = value.IndexOf(c);
return idx < 0 ? "" : value.Substring(idx + 1);
}

you can use like
string input = "arjunmenon.uking";
int index = input.LastIndexOf(".");
input = input.Substring(index+1, input.Split('.')[1].ToString().Length );

Use Split function
Try this
string[] restr = str.Split('.');
//restr[0] contains arjunmenon
//restr[1] contains uking

char special = '.';
var restr = str.Substring(str.IndexOf(special) + 1).Trim();

Try Regular Expression Language
using System.IO;
using System;
using System.Text.RegularExpressions;
class Program
{
static void Main()
{
string input = "arjunmenon.uking";
string pattern = #"[a-zA-Z0-9].*\.([a-zA-Z0-9].*)";
foreach (Match match in Regex.Matches(input, pattern))
{
Console.WriteLine(match.Value);
if (match.Groups.Count > 1)
for (int ctr = 1; ctr < match.Groups.Count; ctr++)
Console.WriteLine(" Group {0}: {1}", ctr, match.Groups[ctr].Value);
}
}
}
Result:
arjunmenon.uking
Group 1: uking

Personally, I won't do the split and go for the index[1] in the resulting array, if you already know that your correct stuff is in index[1] in the splitted string, then why don't you just declare a constant with the value you wanted to "extract"?
After you make a Split, just get the last item in the array.
string separator = ".";
string text = "my.string.is.evil";
string[] parts = text.Split(separator);
string restr = parts[parts.length - 1];
The variable restr will be = "evil"

string str = "arjunmenon.uking";
string[] splitStr = str.Split('.');
string restr = splitStr[1];

Not like the methods that uses indexes, this one will allow you not to use the empty string verifications, and the presence of your special caracter, and will not raise exceptions when having empty strings or string that doesn't contain the special caracter:
string str = "arjunmenon.uking";
string restr = str.Split('.').Last();
You may find all the info you need here : http://msdn.microsoft.com/fr-fr/library/b873y76a(v=vs.110).aspx
cheers

I think the simplest way will be this:
string restr, str = "arjunmenon.uking";
restr = str.Substring(str.LastIndexOf('.') + 1);

How to split string that delimiters remain in the end of result?

I have several delimiters. For example {del1, del2, del3 }.
Suppose I have text : Text1 del1 text2 del2 text3 del3
I want to split string in such way:
Text1 del1
text2 del2
text3 del3
I need to get array of strings, when every element of array is texti deli.
How can I do this in C# ?

String.Split allows multiple split-delimeters. I don't know if that fits your question though.
Example :
String text = "Test;Test1:Test2#Test3";
var split = text.Split(';', ':', '#');
//split contains an array of "Test", "Test1", "Test2", "Test3"
Edit: you can use a regex to keep the delimeters.
String text = "Test;Test1:Test2#Test3";
var split = Regex.Split(text, #"(?<=[;:#])");
// contains "Test;", "Test1:", "Test2#","Test3"

This should do the trick:
const string input = "text1-text2;text3-text4-text5;text6--";
const string matcher= "(-|;)";
string[] substrings = Regex.Split(input, matcher);
StringBuilder builder = new StringBuilder();
foreach (string entry in substrings)
{
builder.Append(entry);
}
Console.Out.WriteLine(builder.ToString());
note that you will receive empty strings in your substring array for the matches for the two '-';s at the end, you can choose to ignore or do what you like with those values.

You could use a regex. For a string like this "text1;text2|text3^" you could use this:
(.*;|.*\||.*\^)
Just add more alternative pattens for each delimiter.

If you want to keep the delimiter when splitting the string you can use the following:
string[] delimiters = { "del1", "del2", "del3" };
string input = "text1del1text2del2text3del3";
string[] parts = input.Split(delimiters, StringSplitOptions.RemoveEmptyEntries);
for(int index = 0; index < parts.Length; index++)
{
string part = parts[index];
string temp = input.Substring(input.IndexOf(part) + part.Length);
foreach (string delimter in delimiters)
{
if ( temp.IndexOf(delimter) == 0)
{
parts[index] += delimter;
break;
}
}
}
parts will then be:
[0] "text1del1"
[1] "text2del2"
[2] "text3del3"

As #Matt Burland suggested, use Regex
List<string> values = new List<string>();
string s = "abc123;def456-hijk,";
Regex r = new Regex(#"(.*;|.*-|.*,)");
foreach(Match m in r.Matches(s))
values.Add(m.Value);

Replace placeholders in order

I have a part of a URL like this:
/home/{value1}/something/{anotherValue}
Now i want to replace all between the brackets with values from a string-array.
I tried this RegEx pattern: \{[a-zA-Z_]\} but it doesn't work.
Later (in C#) I want to replace the first match with the first value of the array, second with the second.
Update: The /'s cant be used to separate. Only the placeholders {...} should be replaced.
Example: /home/before{value1}/and/{anotherValue}
String array: {"Tag", "1"}
Result: /home/beforeTag/and/1
I hoped it could works like this:
string input = #"/home/before{value1}/and/{anotherValue}";
string pattern = #"\{[a-zA-Z_]\}";
string[] values = {"Tag", "1"};
MatchCollection mc = Regex.Match(input, pattern);
for(int i, ...)
{
mc.Replace(values[i];
}
string result = mc.GetResult;
Edit:
Thank you Devendra D. Chavan and ipr101,
both solutions are greate!

You can try this code fragment,
// Begin with '{' followed by any number of word like characters and then end with '}'
var pattern = #"{\w*}";
var regex = new Regex(pattern);
var replacementArray = new [] {"abc", "cde", "def"};
var sourceString = #"/home/{value1}/something/{anotherValue}";
var matchCollection = regex.Matches(sourceString);
for (int i = 0; i < matchCollection.Count && i < replacementArray.Length; i++)
{
sourceString = sourceString.Replace(matchCollection[i].Value, replacementArray[i]);
}

[a-zA-Z_] describes a character class. For words, you'll have to add * at the end (any number of characters within a-zA-Z_.
Then, to have 'value1' captured, you'll need to add number support : [a-zA-Z0-9_]*, which can be summarized with: \w*
So try this one : {\w*}
But for replacing in C#, string.Split('/') might be easier as Fredrik proposed. Have a look at this too

You could use a delegate, something like this -
string[] strings = {"dog", "cat"};
int counter = -1;
string input = #"/home/{value1}/something/{anotherValue}";
Regex reg = new Regex(#"\{([a-zA-Z0-9]*)\}");
string result = reg.Replace(input, delegate(Match m) {
counter++;
return "{" + strings[counter] + "}";
});

My two cents:
// input string
string txt = "/home/{value1}/something/{anotherValue}";
// template replacements
string[] str_array = { "one", "two" };
// regex to match a template
Regex regex = new Regex("{[^}]*}");
// replace the first template occurrence for each element in array
foreach (string s in str_array)
{
txt = regex.Replace(txt, s, 1);
}
Console.Write(txt);

How to split string by string with multiple inverted commas in string in c#

How to split a string by "," where " is part of string to split by.
string[] stringSeparator = new string[] {","};
while (!sr.EndOfStream) {
string strline = sr.ReadLine();
string[] _values = strline.Split(stringSeparator, StringSplitOptions.None);
for (int entry = 0; entry < _values.Length; entry++) {
MessageBox.Show(_values[entry]);
}
}
Tried to use "","" but it seems to return whole line instead of just part of it.
Edit:
String to split (example):
First line:
"24446022020000000174234443,""PLN"",""NVESTMENT
SOMETHING
"",""2011-03-06"",""2011-03-07"",""-25,21"""
2nd line:
"1,""E"",""2011-03-04"",""2011-03-07"",""2011-03-07"",""1,00"",""0000000100000001"",""UZNANIE
sdsd
ELIXIR"",""45555550040000001244580001"",""Some
Client (E)KLIENT
NR:0000000100000001"",""example
something"",""73116022447246000100000001"""

If you want to represent literal quotation marks in a string, you need to escape it (or double it in a verbatim string literal).
i.e.,
new string[] { "\",\"" };
//or
new string[] { #""",""" };
As for why you're getting the values you were getting, consider the ways you were typing it:
string[] stringSeparator = new string[] { "," };
Is a string array containing a single string, just a comma ,. It will split but you probably didn't get the values you were expecting.
string[] stringSeparator = new string[] { "","" };
Is a string array containing a two strings, both empty (blank) strings. Perhaps it would be clearer if it was typed as: new string[] { "", "" };. The Split() function ignores empty string delimiters so it doesn't split anything.
string[] stringSeparator = new string[] { "\",\"" };
Is a string array containing a single string, double-quote comma double-quote ",". It should get you everything between the "," in your strings.

Try
char[] delimiters = new char[] { ',', '"' };
string[] parts = value.Split(delimiters,
StringSplitOptions.RemoveEmptyEntries);

Trim first and then split to get rid of all quotes.
string[] stringSeparator = new string[] {"\",\""};
while (!sr.EndOfStream)
{
//trim removes first and last quote since they are not removed by the split
string line = sr.ReadLine().Trim('"');
string[] values = line.Split(stringSeparator, StringSplitOptions.None);
for (int index = 0; index < values.Length; index++)
MessageBox.Show(values[index]);
}

string strline = sr.ReadLine();
string[] abc = strline.Split('"');
abc = Array.FindAll(abc, val => val != ",").ToArray();
string result[] = Array.FindAll(abc, val => val != "").ToArray();