Implement a Formattable Type - CSharp Custom Type

CSharp examples for Custom Type:interface

  1. HOME
  2. CSharp
  3. Custom Type
  4. interface

Description

Implement a Formattable Type

Demo Code


using System;/* w w w. j  a  v  a  2 s  .co  m*/

    public class Person : IFormattable
    {
        private string title;
        private string[] names;

        public Person(string title, params string[] names)
        {
            this.title = title;
            this.names = names;
        }

        public override string ToString()
        {
            return ToString("G", null);
        }

        public string ToString(string format, IFormatProvider formatProvider)
        {
            string result = null;

            if (format == null) format = "G";
            switch (format.ToUpper()[0])
            {
                case 'S':
                    result = names[0][0] + ". " + names[names.Length - 1];
                    break;

                case 'P':
                    if (title != null && title.Length != 0)
                    {
                        result = title + ". ";
                    }
                    for (int count = 0; count < names.Length; count++)
                    {
                        if (count != (names.Length - 1))
                        {
                            result += names[count][0] + ". ";
                        }
                        else
                        {
                            result += names[count];
                        }
                    }
                    break;

                case 'I':
                    // Use informal form - first name only.
                    result = names[0];
                    break;

                case 'G':
                default:
                    // Use general/default form - first name and surname.
                    result = names[0] + " " + names[names.Length - 1];
                    break;
            }
            return result;
        }
    }

class MainClass
    {
        public static void Main()
        {
            Person person = new Person("Mr", "Mary", "Glen", "Edith", "Xyz");
            System.Console.WriteLine("Dear {0:G},", person);
            System.Console.WriteLine("Dear {0:P},", person);
            System.Console.WriteLine("Dear {0:I},", person);
            System.Console.WriteLine("Dear {0},", person);
            System.Console.WriteLine("Dear {0:S},", person);
        }
    }

Result


Related Tutorials