.NET Tip: Implement IDisposable to Ensure Your Objects Clean Up After Themselves
11880 ワード
public class GoodResourceCitizen : IDisposable
{
private bool _IsDisposed = false;
~GoodResourceCitizen()
{
Dispose(false);
}
public void Dispose()
{
Dispose(true);
// Tell the garbage collector not to call the finalizer
// since all the cleanup will already be done.
GC.SuppressFinalize(true);
}
protected virtual void Dispose(bool IsDisposing)
{
if (_IsDisposed)
return;
if (IsDisposing)
{
// Free any managed resources in this section
}
// Free any unmanaged resources in this section
_IsDisposed = true;
}
} public class Person:IDisposable
{
public int Age { get; set; }
public override string ToString()
{
return base.ToString();
}
public Person ShallowClone()
{
return base.MemberwiseClone() as Person;
}
public Person DeepClone()
{
var p = new Person();
p.Age = this.Age;
p.Address = new Address() { Detail = this.Address.Detail };
return p;
}
/// <summary>
///
/// Finalize()
/// </summary>
~Person()
{
// base.Finalize();
Dispose(false);
}
public Address Address { get; set; }
public void Dispose()
{
Dispose(true);
// Dispose(true) ， GC Finalize() ， Finalize()
GC.SuppressFinalize(this);
}
/// <summary>
///
/// </summary>
/// <param name="disposing"> Dispose </param>
protected virtual void Dispose(bool disposing)
{
if (disposing)
{
//release managed resources
}
//release unmanaged resources
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ConsoleApplication1
{
public class Human:IDisposable
{
~Human()
{
Dispose(false);
}
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
protected virtual void Dispose(bool disposing)
{
if (disposing)
{
//release managed resources
}
//release unmanaged resources
}
}
public class Animal
{
~Animal()
{
Dispose(false);
}
public void IDisposable.Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
protected virtual void Dispose(bool disposing)
{
if (disposing)
{
//release managed resources
}
//release unmanaged resources
}
public void Close()
{
Dispose(false);
}
}
public class demo
{
public void haha()
{
var human = new Human();
human.Dispose();
var animal = new Animal();
animal.Close();
(animal as IDisposable).Dispose();
}
}
}参考文献
1. C#におけるFinalizeメソッドの問題
2. Object.Finalizeメソッド
3. C#におけるFinalizeメソッドの問題
4. C#におけるオブジェクトの破棄には,Finalize,Dispose,GCの3つの方式がある.
5. 『Effective C#』読書ノート——了解.NETメモリ管理メカニズム<.NETリソース管理>