Convert a list into a comma-separated string

My code is as below:

public void ReadListItem()
{
     List<uint> lst = new List<uint>() { 1, 2, 3, 4, 5 };
     string str = string.Empty;
     foreach (var item in lst)
         str = str + item + ",";

     str = str.Remove(str.Length - 1);
     Console.WriteLine(str);
}

Output: 1,2,3,4,5

What is the most simple way to convert the List<uint> into a comma-separated string?

Enjoy!

Console.WriteLine(String.Join(",", new List<uint> { 1, 2, 3, 4, 5 }));

First Parameter: ","
Second Parameter: new List<uint> { 1, 2, 3, 4, 5 })

String.Join will take a list as a the second parameter and join all of the elements using the string passed as the first parameter into one single string.

You can use String.Join method to combine items:

var str = String.Join(",", lst);

Using String.Join:

string.Join<string>(",", lst);

Using LINQ aggregation:

lst .Aggregate((a, x) => a + "," + x);

If you have a collection of ints:

List<int> customerIds= new List<int>() { 1,2,3,3,4,5,6,7,8,9 };  

You can use string.Join to get a string:

var result = String.Join(",", customerIds);

Enjoy!

Follow this:

List<string> name = new List<string>();

name.Add("Latif");
name.Add("Ram");
name.Add("Adam");
string nameOfString = (string.Join(",", name.Select(x => x.ToString()).ToArray()));

You can refer to the below example for getting a comma-separated string array from a list.

Example:

List<string> testList= new List<string>();
testList.Add("Apple"); // Add string 1
testList.Add("Banana"); // 2
testList.Add("Mango"); // 3
testList.Add("Blue Berry"); // 4
testList.Add("Water Melon"); // 5

string JoinDataString = string.Join(",", testList.ToArray());

> You can use String.Join for this if you are using .NET framework> 4.0.

var result= String.Join(",", yourList);

@{ var result = string.Join(",", @user.UserRoles.Select(x => x.Role.RoleName));
    @result
}

I used in MVC Razor View to evaluate and print all roles separated by commas.

Try

Console.WriteLine((string.Join(",", lst.Select(x=>x.ToString()).ToArray())));

HTH

We can try like this to separate list entries by a comma:

string stations = 
haul.Routes != null && haul.Routes.Count > 0 ?String.Join(",",haul.Routes.Select(y => 
y.RouteCode).ToList()) : string.Empty;

static void Main(string[] args) {
    List<string> listStrings = new List<string>() {"C#", "ASP.NET", "SQL Server", "PHP", "Angular"};
    string CommaSeparateString = GenerateCommaSeparateStringFromList(listStrings);
    Console.Write(CommaSeparateString);
    Console.ReadKey();
}

private static string GenerateCommaSeparateStringFromList(List<string> listStrings){return String.Join(",", listStrings);}

Convert a list of string to a comma-separated string in C#

You can also override ToString() if your list items have more than one string:

public class ListItem
{
    public string string1 { get; set; }

    public string string2 { get; set; }

    public string string3 { get; set; }

    public override string ToString()
    {
        return string.Join(
        ","
        , string1
        , string2
        , string3);
    }
}

To get a CSV string:

ListItem item = new ListItem();
item.string1 = "string1";
item.string2 = "string2";
item.string3 = "string3";

List<ListItem> list = new List<ListItem>();
list.Add(item);

string strinCSV = (string.Join("\n", list.Select(x => x.ToString()).ToArray()));

categories = ['sprots', 'news'];
categoriesList = ", ".join(categories)
print(categoriesList)

This is the output: sprots, news

You can separate list entities by a comma like this:

//phones is a list of PhoneModel
var phoneNumbers = phones.Select(m => m.PhoneNumber)    
                    .Aggregate(new StringBuilder(),
                        (current, next) => current.Append(next).Append(" , ")).ToString();

// Remove the trailing comma and space
if (phoneNumbers.Length > 1)
    phoneNumbers = phoneNumbers.Remove(phoneNumbers.Length - 2, 2);

You can make use of google-collections.jar which has a utility class called Joiner:

String commaSepString = Joiner.on(",").join(lst);

Or you can use the StringUtils class which has a function called join. To make use of StringUtils class, you need to use common-lang3.jar

String commaSepString=StringUtils.join(lst, ',');

For reference, refer this link Convert Collection into Comma Separated String