Hi
I'm using Microsoft Visual C# 2010, and I'm very new to this (although I've had lots of previous experience in other languages).
I may be going around this the complete wrong way, so any advice would be much appreciated.
I'm trying to design a watering system computer: It is made up of different
systems, each system comprised of 14
days, and each day comprised of 10
cycles, and each cycle has the properties
hour,
minute and
duration.
I thought the best way to go about working with all this data would be to define structures for a system, day and cycle. At the moment I have this:
Code:
namespace Water_System_Computer
{
struct WaterSystem
{
public WaterDay[] WaterDays;
public WaterSystem(byte SystemIndex)
{
WaterDays = new WaterDay[14];
}
}
struct WaterDay
{
public WaterCycle[] WaterCycles;
public WaterDay(byte DayIndex = 0)
{
WaterCycles = new WaterCycle[10];
}
}
struct WaterCycle
{
public byte hour;
public byte minute;
public byte duration;
public WaterCycle(byte Duration = 0)
{
hour = 0;
minute = 0;
duration = 0;
}
}
}
In my main class I then have:
Code:
public partial class MainWindow : Form
{
private WaterSystem[] WaterSystems = new WaterSystem[16];
...
In a particular method I then want to set some dummy data into a water cycle, and I have:
Code:
WaterSystems[0].WaterDays[0].WaterCycles[0].hour = 12;
WaterSystems[0].WaterDays[0].WaterCycles[0].minute = 37;
WaterSystems[0].WaterDays[0].WaterCycles[0].duration = 20;
But this is where I'm getting errors. I'm guessing I've probably gone wrong fundamentally somewhere, but the error I'm getting at this point is
NullErrorException: Object reference not set to an instance of an object.
And help or pointers would be greatly appreciated.
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