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How to create a comma separated string from a list of string in C#?
A List of string can be converted to a comma separated string using built in string.Join extension method.
string.Join("," , list);This type of conversion is really useful when we collect a list of data (Ex: checkbox selected data) from the user and convert the same to a comma separated string and query the database to process further.
Example
using System;
using System.Collections.Generic;
namespace DemoApplication {
public class Program {
static void Main(string[] args) {
List<string> fruitsList = new List<string> {
"banana",
"apple",
"mango"
};
string fruits = string.Join(",", fruitsList);
Console.WriteLine(fruits);
Console.ReadLine();
}
}
}Output
The output of the above code is
banana,apple,mango
Similarly, a property in a list of complex objects can also be converted to a comma separated string like below.
Example
using System;
using System.Collections.Generic;
using System.Linq;
namespace DemoApplication {
public class Program {
static void Main(string[] args) {
var studentsList = new List<Student> {
new Student {
Id = 1,
Name = "John"
},
new Student {
Id = 2,
Name = "Jack"
}
};
string students = string.Join(",", studentsList.Select(student => student.Name));
Console.WriteLine(students);
Console.ReadLine();
}
}
public class Student {
public int Id { get; set; }
public string Name { get; set; }
}
}Output
The output of the above code is
John,Jack
Updated on: 08-Aug-2020
8K+ Views
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