How to remove a defined part of a string?

Question

I have this string: "NT-DOM-NV\MTA" How can I delete the first part: "NT-DOM-NV\" To have this as result: "MTA"

How is it possible with RegEx?

Solution 1

you can use this codes:

str = str.Substring (10); // to remove the first 10 characters.
str = str.Remove (0, 10); // to remove the first 10 characters
str = str.Replace ("NT-DOM-NV\\", ""); // to replace the specific text with blank

//  to delete anything before \

int i = str.IndexOf('\\');
if (i >= 0) str = str.SubString(i+1);

Solution 2

string.TrimStart(what_to_cut); // Will remove the what_to_cut from the string as long as the string starts with it.  

"asdasdfghj".TrimStart("asd" ); will result in "fghj".
"qwertyuiop".TrimStart("qwerty"); will result in "uiop".

---

public static System.String CutStart(this System.String s, System.String what)
{
    if (s.StartsWith(what))
        return s.Substring(what.Length);
    else
        return s;
}

"asdasdfghj".CutStart("asd" ); will now result in "asdfghj".
"qwertyuiop".CutStart("qwerty"); will still result in "uiop".

Solution 3

Given that "\" always appear in the string

var s = @"NT-DOM-NV\MTA";
var r = s.Substring(s.IndexOf(@"\") + 1);
// r now contains "MTA"

Solution 4

If there is always only one backslash, use this:

string result = yourString.Split('\\').Skip(1).FirstOrDefault();

If there can be multiple and you only want to have the last part, use this:

string result = yourString.SubString(yourString.LastIndexOf('\\') + 1);

Solution 5

Try

string string1 = @"NT-DOM-NV\MTA";
string string2 = @"NT-DOM-NV\";

string result = string1.Replace( string2, "" );

View more solutions

Comments

[Øyvind Bråthen]

I think the point is for this to work on several different strings, so that he has two strings, and want to remove one from the other.

[Daniel Hilgarth]

-1: He never specified, that either one of the parts is of fixed length.

[Paolo Falabella]

@Daniel: to be fair he has not specified much at all... There may not be a "\" either

[Daniel Hilgarth]

@paolo: You are right. But the assumption that any of those strings is of fixed length maybe would have been correct 30 years ago but not nowadays.

[Tassisto]

this is just what I needed! Thank you.

[Fun Mun Pieng]

@Tassisto, I believe I have more than enough examples to satisfy what you need. If none of them address the issue at hand, please explain again what you need. Hope I have been helpful.

[agradl]

He gave the exact string as well as the desired result...not sure what the big deal is

[katta]

string result = string1.Replace( string2, string.Empty );

[ASN]

What if the string is @"NT-DOM-NV\MTA\ABC\file" and after splitting NT-DOM-NV , I need the first string after split. In this case it should be MTA. If I have to split NT-DOM-NV\MTA then it should return ABC. TIA

[Jacob]

Wired issue. I think many developers don't know that. Anyway, it is really good and clear solution, I replace ALL TrimStart in our application to your CutStart method. Thank you.

[AliNajafZadeh]

The purpose of the question is to search for and delete a string from the beginning of another string. With your method you can not dynamically identify the location of the string and delete it.

[Mikael Östberg]

@zambee The purpose of the question is the get whatever is after the \ char, which is solved in my answer.

[AliNajafZadeh]

@Mikael Östberg OK. Thanks.