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Add commas only if strings are not null or empty

I am creating a simple web form in C #. Here I am getting the full address by concatenating, which works well. But let's say if I have not address2

, city

etc., then I want to skip the extra commas at the end of each line (for example if address1

null or empty).

string address1 = "Address1";
string address2 = "Address2";
string city = "City";
string country = "Country";
string postalCode = "00000";

string fullAddress = ? --> address1 + ","+ address2 +","+ city  and so on
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6 answers


If you want to remove an empty or empty string, you need to filter the array used in the join method:

var array = new[] { address1, address2, city, country, postalCode };
string fullAddress = string.Join(",", array.Where(s => !string.IsNullOrEmpty(s)));


If we do city=""

, we haveAddress1,Address2,Country,00000

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you can use string.join along with filter to remove duplicate commas when one or more values ​​are null or empty.



Console.WriteLine(string.Join(",", new string[] { address1 , address2 , city , country , postalCode }.Where(c => !string.IsNullOrEmpty(c))));
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Try the following:

string address1 = "Address1";
string address2 = "Address2";
string city = "";
string country = "Country";
string postalCode = "00000";

Func<string, string> f = s => string.IsNullOrEmpty(s) ? string.Empty : string.Format("{0},", s);
string fullAddress = string.Format("{0}{1}{2}{3}{4}", f(address1), f(address2), f(city), f(country), f(postalCode)).Trim(',');
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You can use string.Join

to accomplish your task. You can run at dotnetfiddle . Please check the code below:

using System;
using System.Collections.Generic;
using System.Linq;

public class Program
{
    public static void Main()
    {
        string address1 = "Address1";
        string address2 = "Address2";
        string city = "City";
        string country = "Country";
        string postalCode = "00000";

        List<string> strArray = new List<string> { address1, address2, city, country, postalCode };

        string fullAddress = string.Join(",", strArray.Where(m=> !string.IsNullOrEmpty(m)).ToList());

        Console.WriteLine(fullAddress);
    }
}
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You can put all your elements in an array and join the array with ",". In this case, the commas will be well placed, between your other address part.

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String.Join is what you need.

string address1 = "Address1";
string address2 = "Address2";
string city = "City";
string country = "Country";
string postalCode = "00000";

string[] stuff = new string [] { address1, address2, city, country, postalCode };

string fulladdress = string.Join(",", stuff).Replace(",,",",");
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