C＃中的特殊字符串拆分

Question

I would like to split a special formatted string :

string example01 = "2016-05-14-Title-863-Pos-01"

That string must be split into:

date = "2016-05-14";
title = "Title-863";
position = "Pos-01";

I know I can split this string with string.split or Regex but I would like to have a "split" function with formatted seperators or something similar.

More examples:

string example02 = "2016-05-15-Rectangle-Right"
string example03 = "2016-05-16-Border-05-Top"

Example-Method:

string[] split = SplitString("****-**-**", "-");

So the first parameter serves as a placeholder and the second parameter as seperator.

Answer 1

You could use a generic BlockSplit method like this one

string[] BlockSplit(string source, char separator, params int[] blocks)
{
    string[] parts = source.Split(separator);
    List<string> splitted = new List<string>();

    int skipped = 0;
    foreach (int x in blocks)
    {
        string block = string.Join(separator.ToString(), parts.Skip(skipped).Take(x));
        skipped += x;
        splitted.Add(block);
    }
    return splitted.ToArray();
}

Calling this method with your inputs

string test = "2016-05-14-Title-863-Pos-01";
string[] result = BlockSplit(test, '-', new int[] {3,2,2});
foreach(string s in result)
   Console.WriteLine(s);

This could transformed in an extension method for the string class and and allow a syntax like this one

string test = "2016-05-14-Title-863-Pos-01";
string[] result = test.BlockSplit('-', new int[] {3,2,2});

Answer 2

This only works if the string is always in that exact format. If anything changes this becomes flakey:

// Original string, has to be in the exact format shown
var test = "2016-05-14-Title-863-Pos-01";

// Split into groups based on the '-' character
var split = test.Split('-');

// Uses string interpolation '$' to build new strings
var date = $"{split[0]}-{split[1]}-{split[2]}";
var title = $"{split[3]}-{split[4]}";
var position $"{split[5]}-{split[6]}";

Output:

Date: 2016-05-14
Title: Title-863
Position: Pos-01

As pointed out by Phiter, if using an older version if C# then use:

var date = string.Format("{0}-{1}-{2}", split[0], split[1], split[2]);
var title = split[3] + "-" + split[4];
var position = split[5] + "-" + split[6];   

Answer 3

If your data format will always be the same, you can do it like this:

string test = "2016-05-14-Title-863-Pos-01";
string[] ts = test.Split('-');
string date = ts[0] + "-" + ts[1] + "-" + ts[2];
string title = ts[3] + "-" + ts[4];
string position = ts[5] + "-" + ts[6];

Console.WriteLine(String.Format("Date: {0}\nTitle: {1}\nPosition: {2}", date,title,position));

Output:

Date: 2016-05-14
Title: Title-863
Position: Pos-01

See it in action.