Need to get a string after a "word" in a string in c#

Question

i'm having a string in c# for which i have to find a specific word "code" in the string and have to get the remaining string after the word "code".

The string is

"Error description, code : -1"

so i have to find the word code in the above string and i have to get the error code. I have seen regex but now clearly understood. Is there any simple way ?

What would happen should `code` appear twice in said string? — LukeHennerley, Feb 21 '13 at 09:28
Can you clarify - what's the issue with regex? What have you tried and what code do you currently have? — James Snell, Feb 21 '13 at 09:32
@LukeHennerley code may appear twice or more, but at the end, the error code definition will be **code: error code** — Narayan, Feb 21 '13 at 09:33

score 124 · Accepted Answer · edited May 08 '17 at 14:41

124

string toBeSearched = "code : ";
string code = myString.Substring(myString.IndexOf(toBeSearched) + toBeSearched.Length);

Something like this?

Perhaps you should handle the case of missing code :...

string toBeSearched = "code : ";
int ix = myString.IndexOf(toBeSearched);

if (ix != -1) 
{
    string code = myString.Substring(ix + toBeSearched.Length);
    // do something here
}

edited May 08 '17 at 14:41

madster

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answered Feb 21 '13 at 09:27

xanatos

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Oded · Answer 2 · 2013-02-21T09:34:19.223

22

var code = myString.Split(new [] {"code"}, StringSplitOptions.None)[1];
// code = " : -1"

You can tweak the string to split by - if you use "code : ", the second member of the returned array ([1]) will contain "-1", using your example.

edited Feb 21 '13 at 09:34

answered Feb 21 '13 at 09:28

Oded

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Split only takes `params[] char`, it doesn't take `params[] string` :) – LukeHennerley Feb 21 '13 at 09:29
3

@LukeHennerley - [Really?](http://msdn.microsoft.com/en-gb/library/system.string.split.aspx) – Oded Feb 21 '13 at 09:30
1

I was meant to say this doesn't compile :P I stand corrected! – LukeHennerley Feb 21 '13 at 09:31
1

@LukeHennerley - The simplest overload only takes `params char[]`. All the `string[]` overloads require additional parameters. – Oded Feb 21 '13 at 09:33

score 15 · Answer 3 · answered Feb 21 '13 at 09:29

15

Simpler way (if your only keyword is "code" ) may be:

string ErrorCode = yourString.Split(new string[]{"code"}, StringSplitOptions.None).Last();

answered Feb 21 '13 at 09:29

Nogard

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@LukeHennerley it is very common approach for initializing array of strings – Nogard Feb 21 '13 at 09:32

score 10 · Answer 4 · answered Dec 31 '18 at 20:12

add this code to your project

  public static class Extension {
        public static string TextAfter(this string value ,string search) {
            return  value.Substring(value.IndexOf(search) + search.Length);
        }
  }

then use

"code : string text ".TextAfter(":")

score 3 · Answer 5 · answered Feb 21 '13 at 09:29

3

use indexOf() function

string s = "Error description, code : -1";
int index = s.indexOf("code");
if(index != -1)
{
  //DO YOUR LOGIC
  string errorCode = s.Substring(index+4);
}

answered Feb 21 '13 at 09:29

asifsid88

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score 1 · Answer 6 · answered Dec 15 '18 at 23:28

string founded = FindStringTakeX("UID:   994zxfa6q", "UID:", 9);


string FindStringTakeX(string strValue,string findKey,int take,bool ignoreWhiteSpace = true)
    {
        int index = strValue.IndexOf(findKey) + findKey.Length;

        if (index >= 0)
        {
            if (ignoreWhiteSpace)
            {
                while (strValue[index].ToString() == " ")
                {
                    index++;
                }
            }

            if(strValue.Length >= index + take)
            {
                string result = strValue.Substring(index, take);

                return result;
            }


        }

        return string.Empty;
    }

score 0 · Answer 7 · edited Oct 07 '18 at 02:36

0

string originalSting = "This is my string";
string texttobesearched = "my";
string dataAfterTextTobeSearch= finalCommand.Split(new string[] { texttobesearched     }, StringSplitOptions.None).Last();
if(dataAfterTextobeSearch!=originalSting)
{
    //your action here if data is found
}
else
{
    //action if the data being searched was not found
}

edited Oct 07 '18 at 02:36

Stephen Rauch

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answered Oct 07 '18 at 02:12

sarto

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Need to get a string after a "word" in a string in c#

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