Question

USE C#  

Maximum used policy

At the moment, AmSure Insurance Agency distributes exciting Life Insurance Products, Health Insurance Products and Motor Insurance Products. The company wants to find the policy type that has maximum number of users. Given a CSV file with all the policy details that are availed through Amsure, Write a program to find the policy type which has maximum users using LINQ statements.

Create a class Policy which include following attributes,

Data Type	Variable Name
int	_policyNumber
string	_insuranceType
DateTime	_startDate
DateTime	_renewalDate

Include appropriate Properties as follows.
private string _name;
public string Name
{
    get { return _name; }
    set { _name = value; }
}
Create the policy.csv file which contain the policy details (ie) policy number, insurance type, policy start date and policy renewal date which is separated by comma.
Create a program class. Read the policy.csv file and store it into the policy list. Write a LINQ query to find the policy type under which maximum policies are there.

Input and Output Format:
Input consists of policy.csv file.
Output should display the policy type under which maximum policies are there.

Sample input and output :
Input file policy.csv contain the details as follows,
6435,Home Insurance,01-03-2016,10-07-2017
5234,Health Insurance,12-12-2014,06-01-2019
5614,Health Insurance,02-09-2015,03-11-2019
8575,Motor Insurance,07-11-2011,03-12-2017
8541,Health Insurance,01-11-2015,07-12-2016
4526,Motor Insurance,05-01-2017,13-09-2018
Output :
Health Insurance

Answer 1

Updated policy.csv file path.

Also update date time format if required, It Is dd-MM-yyyy for now according to the test data provided.

Please find code in bold.

// Program.cs

using System;
using System.IO;
using System.Linq;
using System.Globalization;
using System.Collections.Generic;

namespace ConsoleApp
{
    class Program
    {
        static void Main(string[] args)
        {
            List policyList = new List();

            // Read all lines from file in string array
            string[] lines = File.ReadAllLines(@"C:\WorkSpace\Chegg\policy.csv");

            foreach (var line in lines)
            {
                string[] values = line.Split(',');

                Policy policy = new Policy();
                policy.PolicyNumber = Convert.ToInt32(values[0]);
                policy.InsuranceType = values[1];
                policy.StartDate = DateTime.ParseExact(values[2], "dd-MM-yyyy", CultureInfo.InvariantCulture);
                policy.RenewalDate = DateTime.ParseExact(values[3], "dd-MM-yyyy", CultureInfo.InvariantCulture);

                policyList.Add(policy);
            }

            // LinQ statement to get most insured policy type
            var pl = policyList
                     .GroupBy(p => p.InsuranceType)
                     .OrderByDescending(x => x.Count())
                     .FirstOrDefault();

            Console.WriteLine(pl.Key);
            Console.Read();
        }
    }
}

// Policy.cs

using System;

namespace ConsoleApp
{
    public class Policy
    {
        private int _policyNumber;
        private string _insuranceType;
        private DateTime _startDate;
        private DateTime _renewalDate;

        public int PolicyNumber
        {
            get { return _policyNumber; }
            set { _policyNumber = value; }
        }
        public string InsuranceType
        {
            get { return _insuranceType; }
            set { _insuranceType = value; }
        }
        public DateTime StartDate
        {
            get { return _startDate; }
            set { _startDate = value; }
        }
        public DateTime RenewalDate
        {
            get { return _renewalDate; }
            set { _renewalDate = value; }
        }
    }
}