I am creating simple webform in C#. Here I am getting full address by concatenating which works well. But let's say if I don't have address2, city, etc, then I want to skip appending commas at end of each string (e.g. if address1 is 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
If you want to remove the empty or null string you have 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 make city="" the we have Address1,Address2,Country,00000
you could use string.join along with a filter to remove the duplicated commas when one or more of the values are null or empty.
Console.WriteLine(string.Join(",", new string[] { address1 , address2 , city , country , postalCode }.Where(c => !string.IsNullOrEmpty(c))));
Try this:
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(',');
You can use string.Join to do your task. You can run in dotnetfiddle.
Please check below code:
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);
}
}
empty value.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(",,",",");
string.Join replaces null parameter values with "string.Empty" with the assumption that other code is determining null handling. If the array itself is null, then an exception is thrown. I'd suggest as a matter of separation of concerns, following with string.Replace() replacing ",," with "," would better address null values. I Updated the answer with this.You can put all your elements in an array and join the array with the ",". In this case, the commas will be well placed, betweed your different address part.
