I'd like to enumerate a string and instead of it returning chars I'd like to have the iterative variable be of type string. This probably isn't possible to have the iterative type be a string so what is the most efficient way to iterate through this string?
Do I need to create a new string object with each iteration of the loop or can I perform a cast somehow?
String myString = "Hello, World"; foreach (Char c in myString) { // what I want to do in here is get a string representation of c // but I can't cast expression of type 'char' to type 'string' String cString = (String)c; // this will not compile } 11 Answers
Use the .ToString() Method
String myString = "Hello, World"; foreach (Char c in myString) { String cString = c.ToString(); } You have two options. Create a string object or call ToString method.
String cString = c.ToString(); String cString2 = new String(c, 1); // second parameter indicates // how many times it should be repeated With C# 6 interpolation:
char ch = 'A'; string s = $"{ch}"; This shaves a few bytes. :)
It seems that the obvious thing to do is this:
String cString = c.ToString() Create a new string from the char.
String cString = new String(new char[] { c }); or
String cString = c.ToString(); Create an extension method:
public static IEnumerable<string> GetCharsAsStrings(this string value) { return value.Select(c => { //not good at all, but also a working variant //return string.Concat(c); return c.ToString(); }); } and loop through strings:
string s = "123456"; foreach (string c in s.GetCharsAsStrings()) { //... } String cString = c.ToString(); Did you try:
String s = new String(new char[] { 'c' });
Why not this code? Won't it be faster?
string myString = "Hello, World"; foreach( char c in myString ) { string cString = new string( c, 1 ); } probably isn't possible to have the iterative type be a string
Sure it is:
foreach (string str in myString.Select(c => c.ToString()) { ... } Any of the suggestions in the other answers can be substituted for c.ToString(). Probably the most efficient by a small hair is c => new string(c, 1), which is what char.ToString() probably does under the hood.
you can use + with empty string "", please check the below code:
char a = 'A'; //a_str is a string, the value of which is "A". string a_str = ""+a; 
