Type.GetMembers()方法用于获取当前Type的成员(属性，方法，字段，事件等)。此方法的重载列表中有2种方法，如下所示：
- GetMembers()方法
- GetMembers(BindingFlags)方法
GetMembers()方法
此方法用于返回当前Type的所有公共成员。
Syntax: public System.Reflection.MemberInfo[] GetMembers ();
Return Value: This method returns an array of MemberInfo objects representing all the public members of the current Type Or an empty array of type MemberInfo if the current Type does not have public members.
下面的程序说明了Type.GetMembers()方法的用法：
范例1：
// C# program to demonstrate the
// Type.GetMember() Method
using System;
using System.Globalization;
using System.Reflection;
// Defining Empty class
public class Empty { }
class GFG {
// Main Method
public static void Main()
{
// Declaring and initializing object of Type
Type objType = typeof(Empty);
// try-catch block for handling Exception
try {
// Getting array of MemberInfos by
// using GetMembers() Method
MemberInfo[] info = objType.GetMembers();
// Display the Result
Console.WriteLine("Fields of current type is as Follow: ");
for (int i = 0; i < info.Length; i++)
Console.WriteLine(" {0}", info[i]);
}
// catch ArgumentNullException here
catch (ArgumentNullException e)
{
Console.Write("name is null.");
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
}
输出：
Fields of current type is as Follow:
Boolean Equals(System.Object)
Int32 GetHashCode()
System.Type GetType()
System.String ToString()
Void .ctor()
范例2：
// C# program to demonstrate the
// Type.GetMember() Method
using System;
using System.Globalization;
using System.Reflection;
class GFG {
// Main Method
public static void Main()
{
// Declaring and initializing object of Type
Type objType = typeof(int);
// try-catch block for handling Exception
try {
// Getting array of MemberInfos by
// using GetMembers() Method
MemberInfo[] info = objType.GetMembers();
// Display the Result
Console.WriteLine("Fields of current type is as Follow: ");
for (int i = 0; i < 6; i++)
Console.WriteLine(" {0}", info[i]);
}
// catch ArgumentNullException here
catch (ArgumentNullException e) {
Console.Write("name is null.");
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
}
输出：
Fields of current type is as Follow:
Int32 CompareTo(System.Object)
Int32 CompareTo(Int32)
Boolean Equals(System.Object)
Boolean Equals(Int32)
Int32 GetHashCode()
System.String ToString()
GetMembers(BindingFlags)方法
当在派生类中重写时，此方法用于使用指定的绑定约束来搜索为当前Type定义的成员。
Syntax: public abstract System.Reflection.MemberInfo[] GetMembers (System.Reflection.BindingFlags bindingAttr);
Here, it takes a bitmask comprised of one or more BindingFlags that specify how the search is conducted or,
Zero (Default), to return an empty array.
返回值：该方法返回一个MemberInfo对象的数组，该对象表示为当前Type定义的所有与指定绑定约束匹配的成员；或者，如果没有为当前Type定义成员，或者没有定义的成员，则为MemberInfo类型的空数组匹配绑定约束。
下面的程序说明了上述方法的用法：
范例1：
// C# program to demonstrate the
// Type.GetMembers(BindingFlags)
// Method
using System;
using System.Globalization;
using System.Reflection;
// Defining class Empty
public class Empty { }
class GFG {
// Main Method
public static void Main()
{
// Declaring and initializing object of Type
Type objType = typeof(Empty);
// try-catch block for handling Exception
try {
// Getting array of Fields by
// using GetField() Method
MemberInfo[] info = objType.GetMembers(BindingFlags.Public
| BindingFlags.Instance);
// Display the Result
Console.WriteLine("Fields of current type is as Follow: ");
for (int i = 0; i < info.Length; i++)
Console.WriteLine(" {0}", info[i]);
}
// catch ArgumentNullException here
catch (ArgumentNullException e) {
Console.WriteLine("name is null.");
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
}
输出：
Fields of current type is as Follow:
Boolean Equals(System.Object)
Int32 GetHashCode()
System.Type GetType()
System.String ToString()
Void .ctor()
范例2：
// C# program to demonstrate the
// Type.GetMembers(BindingFlags)
// Method
using System;
using System.Globalization;
using System.Reflection;
// Defining class Empty
public class Empty { }
class GFG {
// Main Method
public static void Main()
{
// Declaring and initializing object of Type
Type objType = typeof(int);
// try-catch block for handling Exception
try {
// Getting array of Fields by
// using GetField() Method
MemberInfo[] info = objType.GetMembers(BindingFlags.Public
| BindingFlags.Static);
// Display the Result
Console.WriteLine("Fields of current type is as Follow: ");
for (int i = 0; i < info.Length; i++)
Console.WriteLine(" {0}", info[i]);
}
// catch ArgumentNullException here
catch (ArgumentNullException e)
{
Console.WriteLine("name is null.");
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
}
输出：
Fields of current type is as Follow:
Int32 Parse(System.String)
Int32 Parse(System.String, System.Globalization.NumberStyles)
Int32 Parse(System.String, System.IFormatProvider)
Int32 Parse(System.String, System.Globalization.NumberStyles, System.IFormatProvider)
Boolean TryParse(System.String, Int32 ByRef)
Boolean TryParse(System.String, System.Globalization.NumberStyles, System.IFormatProvider, Int32 ByRef)
System.Int32 MaxValue
System.Int32 MinValue
参考：
- https://docs.microsoft.com/zh-cn/dotnet/api/system.type.getmembers?view=netframework-4.8