C# |类型。GetMembers()方法
原文:https://www . geesforgeks . org/c-sharp-type-get members-method/
类型。GetMembers()方法用于获取当前类型的成员(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) Method
GetMembers()方法
此方法用于返回当前类型的所有公共成员。
语法:公共系统。反射. MemberInfo[]GetMembers()；
返回值:该方法返回一个 MemberInfo 对象数组，表示当前类型的所有公共成员，如果当前类型没有公共成员，则返回一个 MemberInfo 类型的空数组。
以下程序说明了类型的使用。GetMembers() 方法:
例 1:
```cs // 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); } } } ```
Output:
```cs Fields of current type is as Follow: Boolean Equals(System.Object) Int32 GetHashCode() System.Type GetType() System.String ToString() Void .ctor()
```
例 2:
```cs // 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); } } } ```
Output:
```cs 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()
```
方法
当在派生类中被重写时，使用指定的绑定约束，此方法用于搜索为当前类型定义的成员。
语法:公共抽象系统。反射。成员信息[]获取成员(系统。反射. binding flags binding attr)； 这里，需要一个由一个或多个 BindingFlags 组成的位掩码来指定如何进行搜索，或者 Zero(默认值)来返回一个空数组。
返回值:此方法返回一个 MemberInfo 对象数组，表示为当前类型定义的符合指定绑定约束的所有成员；如果没有为当前类型定义成员，或者没有定义的成员符合绑定约束，则返回一个 MemberInfo 类型的空数组。
以下程序说明了上述方法的使用:
例 1:
```cs // 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); } } } ```
Output:
```cs Fields of current type is as Follow: Boolean Equals(System.Object) Int32 GetHashCode() System.Type GetType() System.String ToString() Void .ctor()
```
例 2:
```cs // 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); } } } ```
Output:
```cs 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:
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