[英]Newbie how to raise/trigger events in C#
我需要一個litle幫助....我剛剛開始使用C#,我需要在bool值改變時引發一個事件。 我有一個課:
using System;
namespace WOCA
{
public class Arduino
{
public event EventHandler Disconnected;
**protected virtual void OnDisconnected()
{
EventHandler handler = Disconnected;
if (handler != null)
{
handler(this, EventArgs.Empty);
}
}**
private bool _isconnected;
public bool IsConnected
{
get
{
return _isconnected;
}
}
#region Methods
public void Connect()
{
//TODO implement code to connect
_isconnected = true;
}
public void Disconnect()
{
//TODO implement code to connect
_isconnected = false;
}
#endregion Methods
}
}
但是當_isconnected更改值時,如何引發/觸發事件?
它應該很簡單
public event EventHandler Disconnected;
protected virtual void OnDisconnected()
{
EventHandler handler = Disconnected;
if (handler != null)
{
handler(this, EventArgs.Empty);
}
}
private bool _isconnected;
public bool IsConnected
{
get
{
return _isconnected;
}
private set
{
if (!value && _isConnected)
{
OnDisconnected();
}
_isconnected = value;
}
}
#region Methods
public void Connect()
{
//TODO implement code to connect
IsConnected = true;
}
public void Disconnect()
{
//TODO implement code to connect
IsConnected = false;
}
#endregion Methods
你有所有的代碼,你只需要觸發器......
public void Disconnect()
{
_isconnected = false;
OnDisconnected();
}
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