I'm currently working on a lab for class and we were told to make a method in the main form called "DisplayInformation. that accepts a parameter of type Time and then displays the Time objects information" Which doesn't sound difficult to me but we're told to use 2 buttons to access this method. One just goes to the base class and gets the current time and returns it. The other is suppose to go to a derived class. And this is where my problem begins.
private void btnDisplayTime_Click(object sender, EventArgs e)
{
DisplayInformation(time1);
}
And this is the DisplayInformation function I'm not sure about:
private string DisplayInformation (Time zone)
{
time1 = zone;
time1.displayTime();
// extTime1.displayTime();
return "okay";
}//end of DisplayInformation
When i call DisplayInformation with the first button it'll go just fine. And if i make a call from the second button to this method it'll be fine as well. But i need to be able to pick and choose which class i go to. It's difficult to explain really. I just need to be able to call from each button to that method and get a different output depending on the button. I'm not sure if this would just be an if statement or what.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace CIS247A_Week_4_Lab_BREWER
{
class Time
{
private const int MIN_HOUR = 0;
private const int MAX_HOUR = 24;
internal int hour;
internal int minute;
public Time()
{
hour = 12;
minute = 00;
}//end of Time
public Time(int Hour, int Minute)
{
hour = Hour;
开发者_运维问答minute = Minute;
}//end of Time
public int incrementHour(int step)
{
if (step > 0 && hour < 24)
{
//step = step % hour;
hour = (hour + step) % 24;
return hour;
}//end of if
else
{
MessageBox.Show("Please enter a positive number.");
return 0;
}//end of else
}//end of incrementHour
public int incrementMinute(int step)
{
if (step > 0 && minute < 60)
{
minute = (minute + step) / 60;
return 0;
}//end of if
else if (step < 0)
{
MessageBox.Show("Please enter a positive number.");
minute = 0;
return 0;
}//end of else if
else
{
MessageBox.Show("Unknown error.");
return 0;
}
}//end of incrementMinute
public virtual string displayTime()
{
DateTime time = DateTime.Now; // Use current time
string format = "MMM ddd d HH:mm yyyy"; // Use this format
MessageBox.Show(time.ToString(format)); // Write to console
return time.ToString(format);
}//end of displayTime
public int Hour
{
get { return hour; }
set
{
if (value < MIN_HOUR)
{
hour = 0;
MessageBox.Show("Hour value " + value.ToString() + " cannot be negative. Reset to " + MIN_HOUR.ToString(),
"Invalid Hour", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
else
{
//take the modulus to ensure always less than 24 hours
//works even if the value is already within range, or value equal to 24
hour = value % MAX_HOUR;
}
}
}
public int Minute
{
get { return minute; }
set
{
if (value < 0)
{
minute = 0;
//MessageBox.Show("cannot be negitive" , MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
else
{
minute = value % 60;
}
}
}
}//end of Time Class
}//end of Namespace
And the extendedtime class
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace CIS247A_Week_4_Lab_BREWER
{
class ExtendedTime : Time
{
private string timeZone{get; set;}
public ExtendedTime() : base()
{
timeZone = "CDT";
}//end of ExtendedTime
public ExtendedTime(int Hour, int Minute, String TimeZone) :base(Hour, Minute)
{
timeZone = TimeZone;
}//end of ExtendedTime
public override string displayTime()
{
//return base.displayTime();
MessageBox.Show(base.displayTime() + timeZone);
return base.displayTime() + timeZone;
}//end of DisplayTime
}//end of ExtendedTime class
}//end of namespace
And just for time sake the section of the form i'm working on:
public partial class frmTime : Form
{
Time time1;
ExtendedTime extTime1;
public frmTime()
{
//DateTime Ctime = DateTime.Now; // Use current time
// Ctime = new DateTime();
// label1.Text = Ctime.ToString();
InitializeComponent();
time1 = new Time();
extTime1 = new ExtendedTime();
}
private void DisplayInformation (Time zone)
{
time1 = zone;
// time1.displayTime();
extTime1.displayTime();
//return "okay";
}//end of DisplayInformation
//exit Button (btnExit)
private void btnExit_Click(object sender, EventArgs e)
{
Application.Exit();//closes the program
}
private void btnDisplayTime_Click(object sender, EventArgs e)
{
DisplayInformation(time1);
}
In your DisplayInformation class if you are passing in a Time object from one click handler and an extTime object from the other handler then you should be able to just call the displayTime method.
private void DisplayInformation (Time zone)
{
zone.displayTime();
}
on the Time one it will obviously call the base method. On the extTime one despite the fact you are treating it as a Time object it will call the overridden method.
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