关于C#特性

[u012522824]

using System;
using System.Reflection;
using System.Diagnostics;

//attaching Help attribute to entire assembly
[assembly: Help("This Assembly demonstrates custom attributes creation and their run-time query.")]
//our custom attribute class
public class HelpAttribute : Attribute
{
    public HelpAttribute(String Description_in)
    {
        //
        // TODO: Add constructor logic here
        this.description = Description_in;
        //
    }
    protected String description;
    public String Description
    {
        get
        {
            return this.description;
        }
    }
}
//attaching Help attribute to our AnyClass
[Help("This is a do-nothing Class.")]
public class AnyClass
{
    //attaching Help attribute to our AnyMethod
    [Help("This is a do-nothing Method.")]
    public void AnyMethod()
    {
    }
    //attaching Help attribute to our AnyInt Field
    [Help("This is any Integer.")]
    public int AnyInt;
}
class QueryApp
{
    public static void Main()
    {
        Type type = typeof(AnyClass);
        HelpAttribute helpAttribute;
        //Querying Assembly Attributes
        String assemblyName;
        Process process = Process.GetCurrentProcess();
        assemblyName = process.ProcessName + ".exe";
        Assembly assembly = Assembly.LoadFrom(assemblyName);
        foreach (Attribute attribute in assembly.GetCustomAttributes(true))
        {
            helpAttribute = attribute as HelpAttribute;
            if (null != helpAttribute)
            {
                Console.WriteLine("Description of {0}:\n{1}",
                assemblyName, helpAttribute.Description);
            }
        }

        Console.WriteLine("按任意键结束...");
        Console.ReadKey();
    }
}

上面是从网上看到用来学习的代码，输入代码后按照说明应该输出以下结果：
Description of QueryAttribute.exe:
This Assembly demonstrates custom attributes creation and
their run-time query.
Press any key to continue
但是我实际编译运行时什么结果也没有，请大家帮忙看看问题出在哪？谢谢大家！

[BenBenBears]

不要调试，直接运行就会有结果。

[BenBenBears]

http://blog.csdn.net/taonylu/article/details/4828783 这篇C#自定义属性里面也提到在程序运行时获取属性信息。 而“启动调试”和“开始执行（不调试）”的区别在于后者是直接执行编译后的程序，前者是加载到调试器（Debugger）上执行。

[largeskymengsk]

应该是先获取类型：assembly.GetTypes

[anny_li]

你把这个运行一下看看，我试了一下，OK的！ //attaching Help attribute to entire assembly [assembly: Help("This Assembly demonstrates custom attributes creation and their run-time query.")] //our custom attribute class public class HelpAttribute : Attribute { public HelpAttribute(String Description_in) { // // TODO: Add constructor logic here this.description = Description_in; // } protected String description; public String Description { get { return this.description; } } } //attaching Help attribute to our AnyClass [Help("This is a do-nothing Class.")] public class AnyClass { //attaching Help attribute to our AnyMethod [Help("This is a do-nothing Method.")] public void AnyMethod() { } //attaching Help attribute to our AnyInt Field [Help("This is any Integer.")] public int AnyInt; } class QueryApp { public static void Main() { Type type = typeof(AnyClass); HelpAttribute HelpAttr; //Querying Class Attributes foreach (Attribute attr in type.GetCustomAttributes(true)) { HelpAttr = attr as HelpAttribute; if (null != HelpAttr) { Console.WriteLine("Description of AnyClass:\n{0}", HelpAttr.Description); } } //Querying Class-Method Attributes foreach (MethodInfo method in type.GetMethods()) { foreach (Attribute attr in method.GetCustomAttributes(true)) { HelpAttr = attr as HelpAttribute; if (null != HelpAttr) { Console.WriteLine("Description of {0}:\n{1}", method.Name, HelpAttr.Description); } } } //Querying Class-Field (only public) Attributes foreach (FieldInfo field in type.GetFields()) { foreach (Attribute attr in field.GetCustomAttributes(true)) { HelpAttr = attr as HelpAttribute; if (null != HelpAttr) { Console.WriteLine("Description of {0}:\n{1}", field.Name, HelpAttr.Description); } } } } }

[junshanhudazhaxi]

我用你的代码是会有信息输出的。源代码

[u012522824]

好棒，学到了东西！谢谢了！

[u012522824]

引用 2 楼 junshanhudazhaxi 的回复:

我用你的代码是会有信息输出的。源代码

给于热心肠奖2点。

引用 3 楼 BenBenBears 的回复:

不要调试，直接运行就会有结果。

剩下的给予技术老大的报酬，谢谢了！

[anny_li]

引用 2 楼 junshanhudazhaxi 的回复:

我用你的代码是会有信息输出的。源代码

我觉得源代码的继承不对或者自定义属性有问题，因为反射出来的属性没有与之相匹配的！