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。


代码如下:

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：


代码如下:

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：


代码如下:

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: ********