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How to extract string between same char [closed]

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I have a string "ABD-DDD-RED-Large" and need to extract "DDD-RED"
using the Split I have:
var split = "ABD-DDD-RED-Large".Split('-');
var first = split[0];
var second = split[1];
var third = split[2];
var fourth = split[3];
string value = string.Join("-", second, third);
just wondering if there's a shorter code

If you just want the second and third parts of an always 4 part (delimited by -) string you can one line it with LINQ:
string value = string.Join("-", someInputString.Split('-').Skip(1).Take(2));
An input of: "ABD-DDD-RED-Large" would give you an output of: "DDD-RED"

Not enough information. You mentioned that string is not static. May be Regex?
string input = "ABD-DDD-RED-Large";
string pattern = #"(?i)^[a-z]+-([a-z]+-[a-z]+)";
string s = Regex.Match(input, pattern).Groups[1].Value;

Use regex
var match = Regex.Match(split, #".*?-(.*?-.*?)-.*?");
var value = match.Success ? match.Groups[1].Value : string.Empty;

I'm going out on a limb and assuming your string is always FOUR substrings divided by THREE hyphens. The main benefit of doing it this way is that it only requires the basic String library.
You can use:
int firstDelIndex = input.IndexOf('-');
int lastDelIndex = input.LastIndexOf('-');
int neededLength = lastDelIndex - firstDelIndex - 1;
result = input.Substring((firstDelIndex + 1), neededLength);
This is generic enough to not care what any of the actual inputs are except the hyphen character.
You may want to add a catch at the start of the method using this to ensure there are at least two hyphen's in the input string before trying to pull out the requested substring.

Extract substring from the first letter [closed]

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I need to extract substring from string but starting with the first letter
example :
string s1 = "12 x 13 ABC 12# 15.8" substring = ABC 12# 15.8
string s2 = "25 x 32 FER #23.8" substring = FER #23.8
I tried the index of for the letter A or F but it didn't work
thanks

This should work (in case you use a non-letter character instead of x)
string SubstringThis(string input)
{
return new string(input.SkipWhile(c => !char.IsLetter(c)).ToArray());
}

Simple utility function:
string SubstringFromFirstLetter(string s)
{
for (int i=0; i < s.Length; ++i)
{
if (char.IsLetter(s[i]))
{
return s.Substring(i);
}
}
return "";
}
Keep in mind that x is a letter. Do you want it to match only capitalized letters?

public static string GetSubstringStartingWithFirstAlphaCharacter(this string toEvaluate)
{
const string pattern = "([a-zA-Z])(.+)";
var regex = new Regex(pattern);
return regex.Match(toEvaluate).Value;
}

How to format a very long text on a TextBox? [closed]

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How to format my text in TextBox?
My text value is:
00010001008002020100010000530997000014820000148200010000012C00001482000014820000148200010000012C000014820000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000101000000000000000000000000000000000000003F
And I want my output to be like this:
00010001-0080-02020100010000-53099700-00148200-00-14820001-0000-012C0000-14820000-1482000-0148-20001000-0012C000-0148-20000000-00000000-0000-00-000000000-00000000-0000-00000000-0000000-0000-00000000-00000000-00000000-0000-00000000-00-00000-000001010-00000000-000000000-0000-000000000-00000003-F

Your format must be fixed. It should not be dynamic.
I am just providing a logic you could append the further detail in regex string.
string mystring = "000100010080"
string regex = #"(\w{4})(\w{4})(\w{4})";
string strValue = Regex.Replace(mystring, regex, #"$1-$2-$3");
OUTPUT:
0001-0001-0080
EDITED: Take a look at complete example
string[] patern = "XXXXXXXX-XXXX-XXXXXXXXXXXXXX-XXXXXXXX-XXXXXXXX-XX-XXXXXXXX-
XXXX-XXXXXXXX-XXXXXXXX-XXXXXXX-XXXX-XXXXXXXX-XXXXXXXX-XXXX-
XXXXXXXX-XXXXXXXX-XXXX-XX-XXXXXXXXX-XXXXXXXX-XXXX-XXXXXXXX-
XXXXXXX-XXXX-XXXXXXXX-XXXXXXXX-XXXXXXXX-XXXX-XXXXXXXX-XX-
XXXXX-XXXXXXXXX-XXXXXXXX-XXXXXXXXX-XXXX-XXXXXXXXX-XXXXXXXX-
X".Split('-');
string mystring = "00010001008002020100010000530997000014820000148200010000012C0
0001482000014820000148200010000012C00001482000000000000000000
0000000000000000000000000000000000000000000000000000000000000
0000000000000000000000000000001010000000000000000000000000000
00000000003F";
string regex = string.Empty;
string match = string.Empty;
for(int i=0; i<patern.Length;i++)
{
regex += #"(\w{" + patern[i].Length + "})";
match += "$" + (i + 1).ToString() + "-";
}
match = match.Substring(0, match.Length - 1);
txtMyTextBox.Text = Regex.Replace(mystring, regex, match);

Assuming that you have a fixed pattern of inserting hyphens and the string length is same every time, then you could do something like this:
int[] indices = new int[] { 2, 5, 11 };
string yourLongString = "blahblahblah";
foreach( var index in indices.Reverse() )
{
yourLongString = yourLongString.Insert( index - 1, "-" );
}
OR
Assuming you have no predefined pattern, you could insert hyphens anywhere and hence still you could use the same code above with the tweak to randomize the indices array, if needed.

C# - split string [closed]

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I have some problems with split and check string.
I need to split string, replace halfs and check is this the same as the second string.
example: first string = tokyo second string = koyto
soo... S = a+b = b+a
S - a = b and S - b = a
a and b is part of one string (S) and may have different long in this case a = to and b = koy
first I need to check string length - is the are different - then write Error - it's easy
the I thought that I can compare strings in ASCII (case sensitivity is not important) and it' could be ok but...
I can create string tooky which have got the same size in ASCII but is not created from split and invert parts of first string...
any ideas?
static void Main(string[] args)
{
string S = "tokyo";
string T = "kyoto";
if (S.Length == T.Length)
{
split string ?
}
else
Console.WriteLine("This two words are different. No result found.");
Console.Read();
}

I would suggest doing the comparisons with strings. You can use the String.ToLower() method to convert them both to lowercase for comparison.
I am not exactly sure what problem you are trying to solve is, but from what I understand you are trying to check if string S can be split into two substrings that can be rearranged to make string T.
To check this you will want something similar to the following
for (int i = 0; i < S.length; i++) {
string back = S.substring(i);
string front = S.substring(0,i);
if (T.equals(back + front))
result = true;
}
Hope this helps

If you want to compare equality of two collections you should consider using LINQ:
static void Main(string[] args)
{
string S = "tokyo";
string T = "kyoto";
if (S.Length == T.Length)
{
if (S.Intersect(T).Any())
{
Console.WriteLine("The Contents are the same");
Console.Read();
}
}
else
Console.WriteLine("This two words are diferent. No result found.");
Console.Read();
}

C# read only part of whole string [closed]

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I have a string which has a following format:
"####/xxxxx"
The text before the "/" is always an integer and I need to read it. How do I get only the integer part of this string (before the "/")?
Thank you for your help.

You can split the string on / and then use int.TryParse on the first element of array to see if it is an integer like:
string str = "1234/xxxxx";
string[] array = str.Split(new []{'/'}, StringSplitOptions.RemoveEmptyEntries);
int number = 0;
if (str.Length == 2 && int.TryParse(array[0], out number))
{
//parsing successful.
}
else
{
//invalid number / string
}
Console.WriteLine(number);

Use IndexOf and Substring:
int indexOfSlash = text.IndexOf('/');
string beforeSlash = null;
int numBeforeSlash = int.MinValue;
if(indexOfSlash >= 0)
{
beforeSlash = text.Substring(0, indexOfSlash);
if(int.TryParse(beforeSlash, out numBeforeSlash))
{
// numBeforeSlash contains the real number
}
}

Another alternative: use a regular expression:
var re = new System.Text.RegularExpression(#"^(\d+)/", RegexOptions.Compiled);
// ideally make re a static member so it only has to be compiled once
var m = re.Match(text);
if (m.IsMatch) {
var beforeSlash = Integer.Parse(re.Groups[0].Value);
}