Need to get 2 dates from user input and compare them in an if statement

-2

I am asking the user for an 2 input dates e.g going flight and returning flight then I need to be able to compare in an if statement that if the flights are between the summer range the price is 20% more.

All help appreciated, Visual Studio C#

This is what I tried:

String firstDate;

            String secondDate;

            double people;

            Console.WriteLine("Please Enter the number of people:")

            people = Convert.ToDouble(Console.ReadLine());

            double flightPrice = 238;

            Console.Write("Please enter the arrival date (dd-MM-yyyy):");

            firstDate = Console.ReadLine();

            Console.Write("Please enter the departure date (dd-MM-yyyy):");

            secondDate = Console.ReadLine();



            if (firstDate >= "15-06-2018" && secondDate <= "15-08-2018")

            {

                flightPrice = 238 * 1.20 * people;

            }

            else

            {

                flightPrice = 238 * people;

            }



            Console.ReadLine();

The error is in the if statement (operator >= cannot be applied to operands of type 'string' and 'string'.

edited Jan 2 at 17:18

asked Jan 2 at 17:01

Old Runescape Character

1

You tried anything yet? If so how far have you got? Try posting some code to help us understand where you're issue is.

– sr28
Jan 2 at 17:02

2

What API is this for? ASP.NET? WinForms? WPF? UWP?

– Dour High Arch
Jan 2 at 17:03

Sorry im new here, This is a C# homework for school.

– Old Runescape Character
Jan 2 at 17:14

Going to edit the post putting the code I tried.

– Old Runescape Character
Jan 2 at 17:14

Number of people should be int of uint

– ES2018
Jan 2 at 17:51

|
show 2 more comments

-2

All help appreciated, Visual Studio C#

This is what I tried:

String firstDate;

            String secondDate;

            double people;

            Console.WriteLine("Please Enter the number of people:")

            people = Convert.ToDouble(Console.ReadLine());

            double flightPrice = 238;

            Console.Write("Please enter the arrival date (dd-MM-yyyy):");

            firstDate = Console.ReadLine();

            Console.Write("Please enter the departure date (dd-MM-yyyy):");

            secondDate = Console.ReadLine();



            if (firstDate >= "15-06-2018" && secondDate <= "15-08-2018")

            {

                flightPrice = 238 * 1.20 * people;

            }

            else

            {

                flightPrice = 238 * people;

            }



            Console.ReadLine();

The error is in the if statement (operator >= cannot be applied to operands of type 'string' and 'string'.

edited Jan 2 at 17:18

asked Jan 2 at 17:01

Old Runescape Character

1

You tried anything yet? If so how far have you got? Try posting some code to help us understand where you're issue is.

– sr28
Jan 2 at 17:02

2

What API is this for? ASP.NET? WinForms? WPF? UWP?

– Dour High Arch
Jan 2 at 17:03

Sorry im new here, This is a C# homework for school.

– Old Runescape Character
Jan 2 at 17:14

Going to edit the post putting the code I tried.

– Old Runescape Character
Jan 2 at 17:14

Number of people should be int of uint

– ES2018
Jan 2 at 17:51

|
show 2 more comments

-2

All help appreciated, Visual Studio C#

This is what I tried:

String firstDate;

            String secondDate;

            double people;

            Console.WriteLine("Please Enter the number of people:")

            people = Convert.ToDouble(Console.ReadLine());

            double flightPrice = 238;

            Console.Write("Please enter the arrival date (dd-MM-yyyy):");

            firstDate = Console.ReadLine();

            Console.Write("Please enter the departure date (dd-MM-yyyy):");

            secondDate = Console.ReadLine();



            if (firstDate >= "15-06-2018" && secondDate <= "15-08-2018")

            {

                flightPrice = 238 * 1.20 * people;

            }

            else

            {

                flightPrice = 238 * people;

            }



            Console.ReadLine();

The error is in the if statement (operator >= cannot be applied to operands of type 'string' and 'string'.

edited Jan 2 at 17:18

asked Jan 2 at 17:01

Old Runescape Character

All help appreciated, Visual Studio C#

This is what I tried:

String firstDate;

            String secondDate;

            double people;

            Console.WriteLine("Please Enter the number of people:")

            people = Convert.ToDouble(Console.ReadLine());

            double flightPrice = 238;

            Console.Write("Please enter the arrival date (dd-MM-yyyy):");

            firstDate = Console.ReadLine();

            Console.Write("Please enter the departure date (dd-MM-yyyy):");

            secondDate = Console.ReadLine();



            if (firstDate >= "15-06-2018" && secondDate <= "15-08-2018")

            {

                flightPrice = 238 * 1.20 * people;

            }

            else

            {

                flightPrice = 238 * people;

            }



            Console.ReadLine();

The error is in the if statement (operator >= cannot be applied to operands of type 'string' and 'string'.

c# date datetime int

edited Jan 2 at 17:18

asked Jan 2 at 17:01

Old Runescape Character

edited Jan 2 at 17:18

asked Jan 2 at 17:01

Old Runescape Character

edited Jan 2 at 17:18

asked Jan 2 at 17:01

Old Runescape Character

asked Jan 2 at 17:01

Old Runescape Character

asked Jan 2 at 17:01

Old Runescape Character

1

You tried anything yet? If so how far have you got? Try posting some code to help us understand where you're issue is.

– sr28
Jan 2 at 17:02

2

What API is this for? ASP.NET? WinForms? WPF? UWP?

– Dour High Arch
Jan 2 at 17:03

Sorry im new here, This is a C# homework for school.

– Old Runescape Character
Jan 2 at 17:14

Going to edit the post putting the code I tried.

– Old Runescape Character
Jan 2 at 17:14

Number of people should be int of uint

– ES2018
Jan 2 at 17:51

|
show 2 more comments

1

You tried anything yet? If so how far have you got? Try posting some code to help us understand where you're issue is.

– sr28
Jan 2 at 17:02

2

What API is this for? ASP.NET? WinForms? WPF? UWP?

– Dour High Arch
Jan 2 at 17:03

Sorry im new here, This is a C# homework for school.

– Old Runescape Character
Jan 2 at 17:14

Going to edit the post putting the code I tried.

– Old Runescape Character
Jan 2 at 17:14

Number of people should be int of uint

– ES2018
Jan 2 at 17:51

You tried anything yet? If so how far have you got? Try posting some code to help us understand where you're issue is.

– sr28
Jan 2 at 17:02

What API is this for? ASP.NET? WinForms? WPF? UWP?

– Dour High Arch
Jan 2 at 17:03

Sorry im new here, This is a C# homework for school.

– Old Runescape Character
Jan 2 at 17:14

Going to edit the post putting the code I tried.

– Old Runescape Character
Jan 2 at 17:14

Number of people should be int of uint

– ES2018
Jan 2 at 17:51

|
show 2 more comments

3 Answers
3

active

oldest

votes

Try following :

            string firstDate = "10-08-2018";

            DateTime _firstDate = DateTime.ParseExact(firstDate, "dd-MM-yyyy", System.Globalization.CultureInfo.InvariantCulture);

            string secondDate = "10-08-2018";

            DateTime _secondDate = DateTime.ParseExact(secondDate, "dd-MM-yyyy", System.Globalization.CultureInfo.InvariantCulture);



            if (_firstDate >= DateTime.ParseExact("15-06-2018", "dd-MM-yyyy", System.Globalization.CultureInfo.InvariantCulture) &&

                _secondDate <= DateTime.ParseExact("15-08-2018", "dd-MM-yyyy", System.Globalization.CultureInfo.InvariantCulture))

            {

            }

answered Jan 2 at 17:38

jdweng

17.9k2817

Thanks for the reply, but I need the two dates as user input first

– Old Runescape Character
Jan 2 at 17:40

The user inputs are the two strings. I just hard coded values to show all the code needed.

– jdweng
Jan 2 at 17:49

okay ill try it thanks alot

– Old Runescape Character
Jan 2 at 17:57

Thanks it worked!, last thing is there a way to print the number of days in the two dates?

– Old Runescape Character
Jan 2 at 18:07

string totalDays = (_secondDate - _firstDate).TotalDays.ToString();

– jdweng
Jan 2 at 18:30

|
show 4 more comments

If you are expecting the date strings in a specific format, then you can use TryParseExact method of the DateTime object to create a DateTime out of the string, and then use that DateTime object to do the comparison with your hard-coded dates.

We can also use the similar TryParse method to get an integer from the user when they enter the number of people. This allows us to give them a message if they enter an incorrect value (like "two" instead of "2") and ask them to try again.

For example:

static void Main()

{

    DateTime peakStartDate = new DateTime(2018, 6, 15);

    DateTime peakEndDate = new DateTime(2018, 8, 15);



    Console.Write("Please Enter the number of people: ");



    // Use TryParse to get an integer from the user. If TryParse fails,

    // it means they entered an invalid value, so ask them to do it again.

    // Otherwise, numPeople will hold the integer value they entered

    int numPeople;

    while (!int.TryParse(Console.ReadLine(), out numPeople))

    {

        Console.WriteLine("Error: input was not a whole number.n");

        Console.Write("Please Enter the number of people: ");

    }



    // Now we can set the base flight price for the number of people

    double flightPrice = 238 * numPeople;



    // Get the arrival date from the user

    Console.Write("nPlease enter the arrival date (dd-MM-yyyy): ");

    DateTime firstDate;



    // If TryParseExact fails, they entered an incorrect format, so we

    // keep asking them. If it succeeds, then firstDate will hold the value.

    while (!DateTime.TryParseExact(Console.ReadLine(), "dd-MM-yyyy",

        CultureInfo.CurrentCulture, DateTimeStyles.None, out firstDate))

    {

        Console.WriteLine("Error: input was not in correct formatn");

        Console.Write("Please enter the arrival date (dd-MM-yyyy): ");

    }



    // Same process for departure date

    Console.Write("nPlease enter the departure date (dd-MM-yyyy):");

    DateTime secondDate;



    while (!DateTime.TryParseExact(Console.ReadLine(), "dd-MM-yyyy",

        CultureInfo.CurrentCulture, DateTimeStyles.None, out secondDate))

    {

        Console.WriteLine("Error: input was not in correct format");

        Console.Write("nPlease enter the departure date (dd-MM-yyyy): ");

    }



    // If they're travelling during the peak period, increase the price

    if (firstDate >= peakStartDate && secondDate <= peakEndDate)

    {

        flightPrice *= 1.2;

    }



    Console.ReadLine();



    GetKeyFromUser("nDone! Press any key to exit...");

}

If you want to be more flexible and let the user enter single-digit days and/or months, you can create an array of valid formats like so:

string validDateTimeFormats = {"dd-MM-yyyy", "d-MM-yyyy", "dd-M-yyyy", "d-M-yyyy"};

And then pass the array to the TryParseExact method:

while (!DateTime.TryParseExact(Console.ReadLine(), validDateTimeFormats,

    CultureInfo.CurrentCulture, DateTimeStyles.None, out firstDate))

{

edited Jan 2 at 18:08

answered Jan 2 at 18:05

Rufus L

19.3k31732

Thanks but user jdweng solved it for me!

– Old Runescape Character
Jan 2 at 18:08

Cool. Although ParseExact will throw an exception if the user enters invalid input. TryParseExact allows you to handle that situation without blowing up... :)

– Rufus L
Jan 2 at 18:09

Alright thanks alot will use it

– Old Runescape Character
Jan 2 at 18:12

add a comment |

You need to cast the date strings to DateTime objects before you can compare them, you cant compare the dates directly as strings.

DateTime arrivalDate = DateTime.Parse(firstDate);

DateTime departureDate = DateTime.Parse(secondDate);



DateTime summerStart = DateTime.Parse("15-06-2018");

DateTime summerEnd = DateTime.Parse("15-08-2018");



if (arrivalDate >= summerStart && departureDate <= summerEnd)

{

    flightPrice = 238 * 1.20 * people;

}

else

{

        flightPrice = 238 * people;

}

answered Jan 2 at 17:32

Shwabster

3241922

Hey thanks for this but i'm getting an error 'String was not recognized as a valid DateTime. For DateTime = summerStart etc

– Old Runescape Character
Jan 2 at 17:37

add a comment |

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3 Answers
3

active

oldest

votes

3 Answers
3

active

oldest

votes

Try following :

            string firstDate = "10-08-2018";

            DateTime _firstDate = DateTime.ParseExact(firstDate, "dd-MM-yyyy", System.Globalization.CultureInfo.InvariantCulture);

            string secondDate = "10-08-2018";

            DateTime _secondDate = DateTime.ParseExact(secondDate, "dd-MM-yyyy", System.Globalization.CultureInfo.InvariantCulture);



            if (_firstDate >= DateTime.ParseExact("15-06-2018", "dd-MM-yyyy", System.Globalization.CultureInfo.InvariantCulture) &&

                _secondDate <= DateTime.ParseExact("15-08-2018", "dd-MM-yyyy", System.Globalization.CultureInfo.InvariantCulture))

            {

            }

answered Jan 2 at 17:38

jdweng

17.9k2817

Thanks for the reply, but I need the two dates as user input first

– Old Runescape Character
Jan 2 at 17:40

The user inputs are the two strings. I just hard coded values to show all the code needed.

– jdweng
Jan 2 at 17:49

okay ill try it thanks alot

– Old Runescape Character
Jan 2 at 17:57

Thanks it worked!, last thing is there a way to print the number of days in the two dates?

– Old Runescape Character
Jan 2 at 18:07

string totalDays = (_secondDate - _firstDate).TotalDays.ToString();

– jdweng
Jan 2 at 18:30

|
show 4 more comments

Try following :

            string firstDate = "10-08-2018";

            DateTime _firstDate = DateTime.ParseExact(firstDate, "dd-MM-yyyy", System.Globalization.CultureInfo.InvariantCulture);

            string secondDate = "10-08-2018";

            DateTime _secondDate = DateTime.ParseExact(secondDate, "dd-MM-yyyy", System.Globalization.CultureInfo.InvariantCulture);



            if (_firstDate >= DateTime.ParseExact("15-06-2018", "dd-MM-yyyy", System.Globalization.CultureInfo.InvariantCulture) &&

                _secondDate <= DateTime.ParseExact("15-08-2018", "dd-MM-yyyy", System.Globalization.CultureInfo.InvariantCulture))

            {

            }

answered Jan 2 at 17:38

jdweng

17.9k2817

Thanks for the reply, but I need the two dates as user input first

– Old Runescape Character
Jan 2 at 17:40

The user inputs are the two strings. I just hard coded values to show all the code needed.

– jdweng
Jan 2 at 17:49

okay ill try it thanks alot

– Old Runescape Character
Jan 2 at 17:57

Thanks it worked!, last thing is there a way to print the number of days in the two dates?

– Old Runescape Character
Jan 2 at 18:07

string totalDays = (_secondDate - _firstDate).TotalDays.ToString();

– jdweng
Jan 2 at 18:30

|
show 4 more comments

Try following :

            string firstDate = "10-08-2018";

            DateTime _firstDate = DateTime.ParseExact(firstDate, "dd-MM-yyyy", System.Globalization.CultureInfo.InvariantCulture);

            string secondDate = "10-08-2018";

            DateTime _secondDate = DateTime.ParseExact(secondDate, "dd-MM-yyyy", System.Globalization.CultureInfo.InvariantCulture);



            if (_firstDate >= DateTime.ParseExact("15-06-2018", "dd-MM-yyyy", System.Globalization.CultureInfo.InvariantCulture) &&

                _secondDate <= DateTime.ParseExact("15-08-2018", "dd-MM-yyyy", System.Globalization.CultureInfo.InvariantCulture))

            {

            }

answered Jan 2 at 17:38

jdweng

17.9k2817

Try following :

            string firstDate = "10-08-2018";

            DateTime _firstDate = DateTime.ParseExact(firstDate, "dd-MM-yyyy", System.Globalization.CultureInfo.InvariantCulture);

            string secondDate = "10-08-2018";

            DateTime _secondDate = DateTime.ParseExact(secondDate, "dd-MM-yyyy", System.Globalization.CultureInfo.InvariantCulture);



            if (_firstDate >= DateTime.ParseExact("15-06-2018", "dd-MM-yyyy", System.Globalization.CultureInfo.InvariantCulture) &&

                _secondDate <= DateTime.ParseExact("15-08-2018", "dd-MM-yyyy", System.Globalization.CultureInfo.InvariantCulture))

            {

            }

answered Jan 2 at 17:38

jdweng

17.9k2817

answered Jan 2 at 17:38

jdweng

17.9k2817

answered Jan 2 at 17:38

jdweng

17.9k2817

answered Jan 2 at 17:38

jdweng

17.9k2817

Thanks for the reply, but I need the two dates as user input first

– Old Runescape Character
Jan 2 at 17:40

The user inputs are the two strings. I just hard coded values to show all the code needed.

– jdweng
Jan 2 at 17:49

okay ill try it thanks alot

– Old Runescape Character
Jan 2 at 17:57

Thanks it worked!, last thing is there a way to print the number of days in the two dates?

– Old Runescape Character
Jan 2 at 18:07

string totalDays = (_secondDate - _firstDate).TotalDays.ToString();

– jdweng
Jan 2 at 18:30

|
show 4 more comments

Thanks for the reply, but I need the two dates as user input first

– Old Runescape Character
Jan 2 at 17:40

The user inputs are the two strings. I just hard coded values to show all the code needed.

– jdweng
Jan 2 at 17:49

okay ill try it thanks alot

– Old Runescape Character
Jan 2 at 17:57

Thanks it worked!, last thing is there a way to print the number of days in the two dates?

– Old Runescape Character
Jan 2 at 18:07

string totalDays = (_secondDate - _firstDate).TotalDays.ToString();

– jdweng
Jan 2 at 18:30

Thanks for the reply, but I need the two dates as user input first

– Old Runescape Character
Jan 2 at 17:40

The user inputs are the two strings. I just hard coded values to show all the code needed.

– jdweng
Jan 2 at 17:49

okay ill try it thanks alot

– Old Runescape Character
Jan 2 at 17:57

Thanks it worked!, last thing is there a way to print the number of days in the two dates?

– Old Runescape Character
Jan 2 at 18:07

string totalDays = (_secondDate - _firstDate).TotalDays.ToString();

– jdweng
Jan 2 at 18:30

|
show 4 more comments

For example:

static void Main()

{

    DateTime peakStartDate = new DateTime(2018, 6, 15);

    DateTime peakEndDate = new DateTime(2018, 8, 15);



    Console.Write("Please Enter the number of people: ");



    // Use TryParse to get an integer from the user. If TryParse fails,

    // it means they entered an invalid value, so ask them to do it again.

    // Otherwise, numPeople will hold the integer value they entered

    int numPeople;

    while (!int.TryParse(Console.ReadLine(), out numPeople))

    {

        Console.WriteLine("Error: input was not a whole number.n");

        Console.Write("Please Enter the number of people: ");

    }



    // Now we can set the base flight price for the number of people

    double flightPrice = 238 * numPeople;



    // Get the arrival date from the user

    Console.Write("nPlease enter the arrival date (dd-MM-yyyy): ");

    DateTime firstDate;



    // If TryParseExact fails, they entered an incorrect format, so we

    // keep asking them. If it succeeds, then firstDate will hold the value.

    while (!DateTime.TryParseExact(Console.ReadLine(), "dd-MM-yyyy",

        CultureInfo.CurrentCulture, DateTimeStyles.None, out firstDate))

    {

        Console.WriteLine("Error: input was not in correct formatn");

        Console.Write("Please enter the arrival date (dd-MM-yyyy): ");

    }



    // Same process for departure date

    Console.Write("nPlease enter the departure date (dd-MM-yyyy):");

    DateTime secondDate;



    while (!DateTime.TryParseExact(Console.ReadLine(), "dd-MM-yyyy",

        CultureInfo.CurrentCulture, DateTimeStyles.None, out secondDate))

    {

        Console.WriteLine("Error: input was not in correct format");

        Console.Write("nPlease enter the departure date (dd-MM-yyyy): ");

    }



    // If they're travelling during the peak period, increase the price

    if (firstDate >= peakStartDate && secondDate <= peakEndDate)

    {

        flightPrice *= 1.2;

    }



    Console.ReadLine();



    GetKeyFromUser("nDone! Press any key to exit...");

}

If you want to be more flexible and let the user enter single-digit days and/or months, you can create an array of valid formats like so:

string validDateTimeFormats = {"dd-MM-yyyy", "d-MM-yyyy", "dd-M-yyyy", "d-M-yyyy"};

And then pass the array to the TryParseExact method:

while (!DateTime.TryParseExact(Console.ReadLine(), validDateTimeFormats,

    CultureInfo.CurrentCulture, DateTimeStyles.None, out firstDate))

{

edited Jan 2 at 18:08

answered Jan 2 at 18:05

Rufus L

19.3k31732

Thanks but user jdweng solved it for me!

– Old Runescape Character
Jan 2 at 18:08

Cool. Although ParseExact will throw an exception if the user enters invalid input. TryParseExact allows you to handle that situation without blowing up... :)

– Rufus L
Jan 2 at 18:09

Alright thanks alot will use it

– Old Runescape Character
Jan 2 at 18:12

add a comment |

For example:

static void Main()

{

    DateTime peakStartDate = new DateTime(2018, 6, 15);

    DateTime peakEndDate = new DateTime(2018, 8, 15);



    Console.Write("Please Enter the number of people: ");



    // Use TryParse to get an integer from the user. If TryParse fails,

    // it means they entered an invalid value, so ask them to do it again.

    // Otherwise, numPeople will hold the integer value they entered

    int numPeople;

    while (!int.TryParse(Console.ReadLine(), out numPeople))

    {

        Console.WriteLine("Error: input was not a whole number.n");

        Console.Write("Please Enter the number of people: ");

    }



    // Now we can set the base flight price for the number of people

    double flightPrice = 238 * numPeople;



    // Get the arrival date from the user

    Console.Write("nPlease enter the arrival date (dd-MM-yyyy): ");

    DateTime firstDate;



    // If TryParseExact fails, they entered an incorrect format, so we

    // keep asking them. If it succeeds, then firstDate will hold the value.

    while (!DateTime.TryParseExact(Console.ReadLine(), "dd-MM-yyyy",

        CultureInfo.CurrentCulture, DateTimeStyles.None, out firstDate))

    {

        Console.WriteLine("Error: input was not in correct formatn");

        Console.Write("Please enter the arrival date (dd-MM-yyyy): ");

    }



    // Same process for departure date

    Console.Write("nPlease enter the departure date (dd-MM-yyyy):");

    DateTime secondDate;



    while (!DateTime.TryParseExact(Console.ReadLine(), "dd-MM-yyyy",

        CultureInfo.CurrentCulture, DateTimeStyles.None, out secondDate))

    {

        Console.WriteLine("Error: input was not in correct format");

        Console.Write("nPlease enter the departure date (dd-MM-yyyy): ");

    }



    // If they're travelling during the peak period, increase the price

    if (firstDate >= peakStartDate && secondDate <= peakEndDate)

    {

        flightPrice *= 1.2;

    }



    Console.ReadLine();



    GetKeyFromUser("nDone! Press any key to exit...");

}

If you want to be more flexible and let the user enter single-digit days and/or months, you can create an array of valid formats like so:

string validDateTimeFormats = {"dd-MM-yyyy", "d-MM-yyyy", "dd-M-yyyy", "d-M-yyyy"};

And then pass the array to the TryParseExact method:

while (!DateTime.TryParseExact(Console.ReadLine(), validDateTimeFormats,

    CultureInfo.CurrentCulture, DateTimeStyles.None, out firstDate))

{

edited Jan 2 at 18:08

answered Jan 2 at 18:05

Rufus L

19.3k31732

Thanks but user jdweng solved it for me!

– Old Runescape Character
Jan 2 at 18:08

Cool. Although ParseExact will throw an exception if the user enters invalid input. TryParseExact allows you to handle that situation without blowing up... :)

– Rufus L
Jan 2 at 18:09

Alright thanks alot will use it

– Old Runescape Character
Jan 2 at 18:12

add a comment |

For example:

static void Main()

{

    DateTime peakStartDate = new DateTime(2018, 6, 15);

    DateTime peakEndDate = new DateTime(2018, 8, 15);



    Console.Write("Please Enter the number of people: ");



    // Use TryParse to get an integer from the user. If TryParse fails,

    // it means they entered an invalid value, so ask them to do it again.

    // Otherwise, numPeople will hold the integer value they entered

    int numPeople;

    while (!int.TryParse(Console.ReadLine(), out numPeople))

    {

        Console.WriteLine("Error: input was not a whole number.n");

        Console.Write("Please Enter the number of people: ");

    }



    // Now we can set the base flight price for the number of people

    double flightPrice = 238 * numPeople;



    // Get the arrival date from the user

    Console.Write("nPlease enter the arrival date (dd-MM-yyyy): ");

    DateTime firstDate;



    // If TryParseExact fails, they entered an incorrect format, so we

    // keep asking them. If it succeeds, then firstDate will hold the value.

    while (!DateTime.TryParseExact(Console.ReadLine(), "dd-MM-yyyy",

        CultureInfo.CurrentCulture, DateTimeStyles.None, out firstDate))

    {

        Console.WriteLine("Error: input was not in correct formatn");

        Console.Write("Please enter the arrival date (dd-MM-yyyy): ");

    }



    // Same process for departure date

    Console.Write("nPlease enter the departure date (dd-MM-yyyy):");

    DateTime secondDate;



    while (!DateTime.TryParseExact(Console.ReadLine(), "dd-MM-yyyy",

        CultureInfo.CurrentCulture, DateTimeStyles.None, out secondDate))

    {

        Console.WriteLine("Error: input was not in correct format");

        Console.Write("nPlease enter the departure date (dd-MM-yyyy): ");

    }



    // If they're travelling during the peak period, increase the price

    if (firstDate >= peakStartDate && secondDate <= peakEndDate)

    {

        flightPrice *= 1.2;

    }



    Console.ReadLine();



    GetKeyFromUser("nDone! Press any key to exit...");

}

If you want to be more flexible and let the user enter single-digit days and/or months, you can create an array of valid formats like so:

string validDateTimeFormats = {"dd-MM-yyyy", "d-MM-yyyy", "dd-M-yyyy", "d-M-yyyy"};

And then pass the array to the TryParseExact method:

while (!DateTime.TryParseExact(Console.ReadLine(), validDateTimeFormats,

    CultureInfo.CurrentCulture, DateTimeStyles.None, out firstDate))

{

edited Jan 2 at 18:08

answered Jan 2 at 18:05

Rufus L

19.3k31732

For example:

static void Main()

{

    DateTime peakStartDate = new DateTime(2018, 6, 15);

    DateTime peakEndDate = new DateTime(2018, 8, 15);



    Console.Write("Please Enter the number of people: ");



    // Use TryParse to get an integer from the user. If TryParse fails,

    // it means they entered an invalid value, so ask them to do it again.

    // Otherwise, numPeople will hold the integer value they entered

    int numPeople;

    while (!int.TryParse(Console.ReadLine(), out numPeople))

    {

        Console.WriteLine("Error: input was not a whole number.n");

        Console.Write("Please Enter the number of people: ");

    }



    // Now we can set the base flight price for the number of people

    double flightPrice = 238 * numPeople;



    // Get the arrival date from the user

    Console.Write("nPlease enter the arrival date (dd-MM-yyyy): ");

    DateTime firstDate;



    // If TryParseExact fails, they entered an incorrect format, so we

    // keep asking them. If it succeeds, then firstDate will hold the value.

    while (!DateTime.TryParseExact(Console.ReadLine(), "dd-MM-yyyy",

        CultureInfo.CurrentCulture, DateTimeStyles.None, out firstDate))

    {

        Console.WriteLine("Error: input was not in correct formatn");

        Console.Write("Please enter the arrival date (dd-MM-yyyy): ");

    }



    // Same process for departure date

    Console.Write("nPlease enter the departure date (dd-MM-yyyy):");

    DateTime secondDate;



    while (!DateTime.TryParseExact(Console.ReadLine(), "dd-MM-yyyy",

        CultureInfo.CurrentCulture, DateTimeStyles.None, out secondDate))

    {

        Console.WriteLine("Error: input was not in correct format");

        Console.Write("nPlease enter the departure date (dd-MM-yyyy): ");

    }



    // If they're travelling during the peak period, increase the price

    if (firstDate >= peakStartDate && secondDate <= peakEndDate)

    {

        flightPrice *= 1.2;

    }



    Console.ReadLine();



    GetKeyFromUser("nDone! Press any key to exit...");

}

If you want to be more flexible and let the user enter single-digit days and/or months, you can create an array of valid formats like so:

string validDateTimeFormats = {"dd-MM-yyyy", "d-MM-yyyy", "dd-M-yyyy", "d-M-yyyy"};

And then pass the array to the TryParseExact method:

while (!DateTime.TryParseExact(Console.ReadLine(), validDateTimeFormats,

    CultureInfo.CurrentCulture, DateTimeStyles.None, out firstDate))

{

edited Jan 2 at 18:08

answered Jan 2 at 18:05

Rufus L

19.3k31732

edited Jan 2 at 18:08

answered Jan 2 at 18:05

Rufus L

19.3k31732

answered Jan 2 at 18:05

Rufus L

19.3k31732

answered Jan 2 at 18:05

Rufus L

19.3k31732

Thanks but user jdweng solved it for me!

– Old Runescape Character
Jan 2 at 18:08

Cool. Although ParseExact will throw an exception if the user enters invalid input. TryParseExact allows you to handle that situation without blowing up... :)

– Rufus L
Jan 2 at 18:09

Alright thanks alot will use it

– Old Runescape Character
Jan 2 at 18:12

add a comment |

Thanks but user jdweng solved it for me!

– Old Runescape Character
Jan 2 at 18:08

Cool. Although ParseExact will throw an exception if the user enters invalid input. TryParseExact allows you to handle that situation without blowing up... :)

– Rufus L
Jan 2 at 18:09

Alright thanks alot will use it

– Old Runescape Character
Jan 2 at 18:12

Thanks but user jdweng solved it for me!

– Old Runescape Character
Jan 2 at 18:08

Cool. Although ParseExact will throw an exception if the user enters invalid input. TryParseExact allows you to handle that situation without blowing up... :)

– Rufus L
Jan 2 at 18:09

Alright thanks alot will use it

– Old Runescape Character
Jan 2 at 18:12

add a comment |

You need to cast the date strings to DateTime objects before you can compare them, you cant compare the dates directly as strings.

DateTime arrivalDate = DateTime.Parse(firstDate);

DateTime departureDate = DateTime.Parse(secondDate);



DateTime summerStart = DateTime.Parse("15-06-2018");

DateTime summerEnd = DateTime.Parse("15-08-2018");



if (arrivalDate >= summerStart && departureDate <= summerEnd)

{

    flightPrice = 238 * 1.20 * people;

}

else

{

        flightPrice = 238 * people;

}

answered Jan 2 at 17:32

Shwabster

3241922

Hey thanks for this but i'm getting an error 'String was not recognized as a valid DateTime. For DateTime = summerStart etc

– Old Runescape Character
Jan 2 at 17:37

add a comment |

You need to cast the date strings to DateTime objects before you can compare them, you cant compare the dates directly as strings.

DateTime arrivalDate = DateTime.Parse(firstDate);

DateTime departureDate = DateTime.Parse(secondDate);



DateTime summerStart = DateTime.Parse("15-06-2018");

DateTime summerEnd = DateTime.Parse("15-08-2018");



if (arrivalDate >= summerStart && departureDate <= summerEnd)

{

    flightPrice = 238 * 1.20 * people;

}

else

{

        flightPrice = 238 * people;

}

answered Jan 2 at 17:32

Shwabster

3241922

Hey thanks for this but i'm getting an error 'String was not recognized as a valid DateTime. For DateTime = summerStart etc

– Old Runescape Character
Jan 2 at 17:37

add a comment |

You need to cast the date strings to DateTime objects before you can compare them, you cant compare the dates directly as strings.

DateTime arrivalDate = DateTime.Parse(firstDate);

DateTime departureDate = DateTime.Parse(secondDate);



DateTime summerStart = DateTime.Parse("15-06-2018");

DateTime summerEnd = DateTime.Parse("15-08-2018");



if (arrivalDate >= summerStart && departureDate <= summerEnd)

{

    flightPrice = 238 * 1.20 * people;

}

else

{

        flightPrice = 238 * people;

}

answered Jan 2 at 17:32

Shwabster

3241922

You need to cast the date strings to DateTime objects before you can compare them, you cant compare the dates directly as strings.

DateTime arrivalDate = DateTime.Parse(firstDate);

DateTime departureDate = DateTime.Parse(secondDate);



DateTime summerStart = DateTime.Parse("15-06-2018");

DateTime summerEnd = DateTime.Parse("15-08-2018");



if (arrivalDate >= summerStart && departureDate <= summerEnd)

{

    flightPrice = 238 * 1.20 * people;

}

else

{

        flightPrice = 238 * people;

}

answered Jan 2 at 17:32

Shwabster

3241922

answered Jan 2 at 17:32

Shwabster

3241922

answered Jan 2 at 17:32

Shwabster

3241922

answered Jan 2 at 17:32

Shwabster

3241922

Hey thanks for this but i'm getting an error 'String was not recognized as a valid DateTime. For DateTime = summerStart etc

– Old Runescape Character
Jan 2 at 17:37

add a comment |

Hey thanks for this but i'm getting an error 'String was not recognized as a valid DateTime. For DateTime = summerStart etc

– Old Runescape Character
Jan 2 at 17:37

Hey thanks for this but i'm getting an error 'String was not recognized as a valid DateTime. For DateTime = summerStart etc

– Old Runescape Character
Jan 2 at 17:37

add a comment |

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