63 lines
1.4 KiB
C#
63 lines
1.4 KiB
C#
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/*
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* C# Program to Demonstrate Trigger Concept
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*/
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using System;
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delegate bool Condition(object obj);
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delegate void Action(object obj);
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class Counter
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{
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int val = 0;
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public event Condition cond;
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public event Action evn;
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public int Value { get { return val; } }
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public void addition(int x)
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{
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val += x;
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Checkpoint();
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}
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public void Clearall()
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{
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val = 0;
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Checkpoint();
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}
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void Checkpoint()
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{
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if (cond != null && evn != null && cond(this)) evn(this);
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}
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}
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class Test
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{
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static int hval = 0;
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static bool CheckpointLimit(object ctr)
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{
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return (((Counter)ctr).Value > 100);
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}
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static void Alarm(object ctr)
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{
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Console.WriteLine("Counter Overflow");
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}
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static void Reset(object ctr)
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{
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hval = ((Counter)ctr).Value;
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Console.WriteLine("hval = " + hval);
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((Counter)ctr).Clearall();
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}
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public static void Main()
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{
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Counter counter = new Counter();
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counter.cond += new Condition(CheckpointLimit);
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counter.evn += new Action(Alarm);
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counter.evn += new Action(Reset);
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counter.addition(10);
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counter.addition(20);
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counter.addition(30);
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counter.addition(40);
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counter.addition(50);
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Console.Read();
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}
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}
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