Split string, convert ToList<int>() in one line

问题:

I have a string that has numbers

string sNumbers = "1,2,3,4,5"; 

I can split it then convert it to List

sNumbers.Split( new[] { ',' } ).ToList(); 

How can I convert string array to integer list? So that I'll be able to convert string[] to IEnumerable

回答1:

var numbers = sNumbers.Split(',').Select(Int32.Parse).ToList(); 

回答2:

You can also do it this way without the need of Linq:

List numbers = new List( Array.ConvertAll(sNumbers.Split(','), int.Parse) );  // Uses Linq var numbers = Array.ConvertAll(sNumbers.Split(','), int.Parse).ToList(); 

回答3:

Joze's way also need LINQ, ToList() is in System.Linq namespace.

You can convert Array to List without Linq by passing the array to List constructor:

List numbers = new List( Array.ConvertAll(sNumbers.Split(','), int.Parse) ); 

回答4:

On Unity3d, int.Parse doesn't work well. So I use like bellow.

List intList = new List( Array.ConvertAll(sNumbers.Split(','),  new Converter((s)=>{return Convert.ToInt32(s);}) ) ); 

Hope this help for Unity3d Users.

回答5:

also you can use this Extension method

public static List SplitToIntList(this string list, char separator = ',') {     return list.Split(separator).Select(Int32.Parse).ToList(); } 

usage:

var numberListString = "1, 2, 3, 4"; List numberList = numberListString.SplitToIntList(','); 

回答6:

It is also possible to int array to direct assign value.

like this

int[] numbers = sNumbers.Split(',').Select(Int32.Parse).ToArray(); 

回答7:

My problem was similar but with the inconvenience that sometimes the string contains letters (sometimes empty).

string sNumbers = "1,2,hh,3,4,x,5"; 

Trying to follow Pcode Xonos Extension Method:

public static List SplitToIntList(this string list, char separator = ',') {       int result = 0;       return (from s in list.Split(',')               let isint = int.TryParse(s, out result)               let val = result               where isint               select val).ToList();  } 

回答8:

You can use new C# 6.0 Language Features:

• replace delegate (s) => { return Convert.ToInt32(s); } with corresponding method group Convert.ToInt32
• replace redundant constructor call: new Converter(Convert.ToInt32) with: Convert.ToInt32

The result will be:

var intList = new List(Array.ConvertAll(sNumbers.Split(','), Convert.ToInt32)); 

回答9:

You can use this:

List sNumberslst = sNumbers.Split(',').ConvertIntoIntList(); 

文章来源: Split string, convert ToList() in one line