如何利用反射构建元数据查看器

原理比较简单，引入system.reflection命名空间，利用反射查看某种type下的方法，属性，字段和支持的接口等。

using system;
using system.collections.generic;
using system.linq;
using system.text;
using system.net;
using system.io;
using system.data.sqlclient;
using system.xml;
using system.data;
using system.reflection;

namespace consoleapplication1
{
    class program
    {
        static void main(string[] args)
        {
            while (true)
            {
                console.writeline("please input a type:");
                string typestr = console.readline();

                if (typestr == "exit" || typestr == "quit")
                    break;

                try
                {
                    type type = type.gettype(typestr);
                    listfields(type);
                    listmethods(type);
                    listinterfaces(type);
                }
                catch (exception ex)
                {
                    console.writeline("it is not a valid type!");
                }
            }

        }

        #region methods
        public static void listfields(type type)
        {
            console.writeline("******** fields: ********");
            //foreach (fieldinfo item in type.getfields(bindingflags.public | bindingflags.nonpublic | bindingflags.static | bindingflags.default))
            foreach (fieldinfo item in type.getfields())
            {
                console.writeline("->" + item.name);
            }
            console.writeline("");
        }

        public static void listmethods(type type)
        {
            console.writeline("******** methods: ********");
            //foreach (var item in type.getmethods(bindingflags.default | bindingflags.public | bindingflags.static | bindingflags.nonpublic))
            var methodinfo = type.getmethods().select(m => m.name).distinct();
            foreach (var item in methodinfo)
            {
                console.writeline("->" + item);
            }
            console.writeline("");
        }

        public static void listinterfaces(type type)
        {
            console.writeline("******** interfaces: ********");
            foreach (var item in type.getinterfaces())
            {
                console.writeline("->" + item.name);
            }
            console.writeline("");
        }

        public static void listproperties(type type)
        {
            console.writeline("******** properties: ********");
            foreach (var item in type.getproperties())
            {
                console.writeline("->" + item.name);
            }
            console.writeline("");
        }
        #endregion

    }

}

测试case 1：

please input a type:
system.int32
******** fields: ********
->maxvalue
->minvalue

******** methods: ********
->compareto
->equals
->gethashcode
->tostring
->parse
->tryparse
->gettypecode
->gettype

******** interfaces: ********
->icomparable
->iformattable
->iconvertible
->icomparable`1
->iequatable`1

测试case 2：

please input a type:
system.math
******** fields: ********
->pi
->e

******** methods: ********
->acos
->asin
->atan
->atan2
->ceiling
->cos
->cosh
->floor
->sin
->tan
->sinh
->tanh
->round
->truncate
->sqrt
->log
->log10
->exp
->pow
->ieeeremainder
->abs
->max
->min
->sign
->bigmul
->divrem
->tostring
->equals
->gethashcode
->gettype

******** interfaces: ********