Split string with string and retrieve value c#

Question

I have below string

string arguments = "-p=C:\Users\mplususer\Documents\SharpDevelop Projects\o9\o9\bin\Debug\o9.exe""-t=False""-r=TestRun";

I want to split string with "-t=" and get false value

if (arguments.Contains("-t="))
{
    string[] value = arguments.Split(new string[] { "\"-t=" }, StringSplitOptions.None);
    if (value.Length != 0)
    {
        mode = value[1].Replace("\"", "");
    }
}

String.Split never returns an empty string[]. If the delimiter is not contained you get an array with one string which is the complete source string. So your value.Length != 0-check is incorrect. It's redundant anyway because you have used already if (arguments.Contains("-t=")). — Tim Schmelter
– Tim Schmelter, Commented Oct 27, 2017 at 10:51
Your code for setting arguments wouldnt compile .. so maybe something else is wrong — BugFinder
– BugFinder, Commented Oct 27, 2017 at 10:52

MakePeaceGreatAgain · Accepted Answer · 2017-10-27 11:35:42Z

2

Simply make an IndexOf:

var i = myString.IndexOf("-t=") + 3;
if(i != -1)
    value = myString.SubString(i, myString.IndexOf("\"", i) - i);

You can also use a regex for this:

var r = new Regex("-t (true|false)");
var g = r.Match(myString).Groups;
if(g.Count > 1)
    value = Convert.ToBoolean(g[1].ToString());

edited Oct 27, 2017 at 11:35

answered Oct 27, 2017 at 10:53

MakePeaceGreatAgain

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Comments

M. Schena · Accepted Answer · 2017-11-22 10:03:41Z

1

You can do it also like this like your approach without regex:

string arguments = "-p=C:\\Users\\mplususer\\Documents\\SharpDevelop Projects\\o9\\o9\\bin\\Debug\\o9.exe\" \"-t=False\" \"-r=TestRun";

if (arguments.Contains("-t="))
{
    string splitted = arguments.Split(new string[] { "\"-t=" }, StringSplitOptions.None)[1];
    string value = splitted.Split(new string[] { "\"" }, StringSplitOptions.None)[0];
}

edited Nov 22, 2017 at 10:03

answered Oct 27, 2017 at 10:57

M. Schena

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Comments

Hans Keﬆing · Accepted Answer · 2017-10-27 11:02:53Z

0

When you split on "-t", you get two fragments. The fragment after that delimiter also contains a "-r" option - which is the issue you are probably seeing.

If you know that the "-t" option is always followed by a "-r", you could simply split on new string[] { "\"-t=", "\"-r=" }. Then you get three fragments and you still want the second one (at index 1).

answered Oct 27, 2017 at 11:02

Hans Keﬆing

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