C# substring with multiple characters

Question

Please find the below sample possible strings

Orange+bhabha<<0
Mango>foo>>10
Apple Https://test.com<<5>>2
Grape==50
kiwi>>20<<5

How do we extract text only from the above string list (e.g., Orange+bhabha,Mango>foo,Apple Https://test.com,Grape etc..)?

Please find the below sample my tried Codesnip:

    eg:var str="Orange<<0";
    str.Split("<<")[0].Split("==")[0].Split(">>")[0];
    // Output : Orange

It is working fine. Is there an optimal solution to solve this issue?

Input -> Desired output 
"Orange+bhabha<<0" -> "Orange+bhabha"
"Mango>foo>>10" -> "Mango>foo"
"Apple Https://test.com<<5>>2" -> "Apple Https://test.com"
"Grape==50" -> "Grape"
"kiwi>>20<<5" -> "Kiwi"

What is "Codesnip"? code snippet? Or the name of a web site? — Peter Mortensen
– Peter Mortensen, Commented Apr 6, 2022 at 10:50

Peter Mortensen · Accepted Answer · 2022-04-06 10:47:36Z

4

You could use a regular expression to replace all non-letters in the string with string.Empty

string result = Regex.Replace(<THE STRING>, @"[^A-Z]+", String.Empty);

However, the above will show all the letters in the string so if your string was something like 'kiwi<<02>>test' it would show 'kiwitest'.

After the latest revision, the following expression should work:

[^a-zA-Z:/.]+

edited Apr 6, 2022 at 10:47

Peter Mortensen

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answered Apr 1, 2022 at 12:46

JamesS

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6 Comments

Joe Over a year ago

Minor tweak: [^a-zA-Z] to allow lower case.

JamesS Over a year ago

@Joe Yep. You're right

Prasanna Kumar J Over a year ago

Sorry I have edited this post, Kindly please recheck

Prasanna Kumar J Over a year ago

But this solution ignoring all characters eg Mango-foo changed to Mangofoo

JamesS Over a year ago

@PrasannaKumarJ That's because I answered the original question How do we extract text only from above string list

|

Somar Zein · Accepted Answer · 2022-04-01 13:20:15Z

2

You can use Split from string library:

string[] stringList = { "Orange+bhabha<<0", "Mango>foo>>10", "Apple Https://test.com<<5>>2", "Grape ==50", "kiwi>>20<<5" };
foreach (var str in stringList)
{
   var result = str.Split(new string [] { ">>", "<<", "==" },StringSplitOptions.None)[0];
   Console.WriteLine(result);
}

One of advantages is that you can modify the separator easily.

answered Apr 1, 2022 at 13:20

Somar Zein

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Comments

Darkk L · Accepted Answer · 2022-04-01 13:38:34Z

0

Also you can try this

    foreach (var item in strList)
    {
        str = str.Replace(item, string.Empty);
    }

answered Apr 1, 2022 at 13:38

Darkk L

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