showattributes.cs

vc的原码例子12 vc的原码例子12

using System;
using System.Reflection;

class FileandDirectoryAttribute: Attribute
{
	public FileandDirectoryAttribute(string directory, string file)
	{ 
		this.directory = directory;
		this.file = file;
	}

	public string directory;
	public string file;
}

class SomeClass
{
	public SomeClass(string value)
	{
		SessionFile = value;
	}
	[FileandDirectory("USER_SESSION", "SESSION_ID.txt")]
	public string SessionFile;
}


public class ShowAttributes
{
	public static void Main()  
	{
		SomeClass Demo = new SomeClass("C:\\USER_SESSION\\SESSION_ID.txt");

		Type type = Type.GetType("SomeClass");

		foreach(FieldInfo field in type.GetFields())
			foreach (Attribute attr in field.GetCustomAttributes(true))
			{
				FileandDirectoryAttribute fileattr = attr as FileandDirectoryAttribute;
		        Console.WriteLine("{0}", fileattr.directory);
				Console.WriteLine("{0}", fileattr.file);
			}  
 	}
}