关于 c# 的 Partial Class

Partial Type

ASP.NET 2.0和Avalon都使用了Partial Class. 这样用户的代码和工具生成的代码可以共同组成一个Class.对Partial Type的支持来自编译器. 4个要点如下:

我们把partial 叫做modifier而不是关键字.
同一类型在不同文件里面都需要使用partial
可以只在一个文件,两个文件,或者更多文件中使用partial
Base class只需要声明一次;若多次声明必需完全一致.

例子:
Contact1.cs
[/b]using System;

namespace Realize.Net.Potential.Sample1

{

public partial class Contact

{

public Contact(string firstName, string lastName)

{

this.firstName = firstName;

this.lastName = lastName;

}

int partial = 0;

private void PartialIsNotAKeyword()

{

partial++;

}

}

public partial class AdvancedContact: Contact

{

public AdvancedContact(string firstName, string lastName, string address) : base(firstName, lastName)

{

this.address = address;

}

}

}

Contact2.cs [/b]

using System;

namespace Realize.Net.Potential.Sample1

{

public partial class Contact

{

string firstName;

string lastName;

}

}

Contact3.cs [/b]

using System;

namespace Realize.Net.Potential.Sample1

{

public partial class Contact

{

public virtual string Name

{

get { return firstName + " " + lastName; }

}

}

public partial class AdvancedContact

{

string address;

public override string Name

{

get

{

return base.Name + " at " + address;

}

}

}

}

MainFun.cs [/b]

using System;

namespace Realize.Net.Potential.Sample1

{

public class MainFunc

{

[STAThread]

static int Main (string[] args)

{

Contact contact = new Contact("Zhanbo", "Sun");

Console.WriteLine(contact.Name);

AdvancedContact advContact = new AdvancedContact("Zhanbo", "Sun", " 1 Microsoft Way ");

Console.WriteLine(advContact.Name);

return 0;

}

}

}

To Compile: [/b]

csc /out:MySample1.exe /t:exe *.cs[/b]

深入了解Generics, iterators, anonymous methods, and partial classes的最佳读本就是更新的C#2.0Specification.