C# |类型。GetNestedTypes()方法
原文:https://www . geesforgeks . org/c-sharp-type-getnestedtypes-method/
类型。方法用于获取嵌套在当前类型中的类型。此方法的重载列表中有 2 种方法，如下所示:
GetNestedTypes()方法
此方法用于返回嵌套在当前类型中的公共类型。
语法:公共类型[]GetNestedTypes()； 返回值:该方法返回一个 type 对象数组，表示嵌套在当前 Type 中的公共类型(搜索不是递归的)，如果当前 Type 中没有嵌套公共类型，则返回 Type 的空数组。
下面的程序说明了上述方法的使用: 例 1:
c sharp . c sharp . c sharp . c sharp
// C# program to demonstrate the
// Type.GetNestedTypes() 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(Person);
// try-catch block for handling Exception
try {
// Getting array of Method by
// using GetMethods() Method
Type[] type = objType.GetNestedTypes();
// Display the Result
Console.WriteLine("NestedType of current type is: ");
for (int i = 0; i < type.Length; i++)
Console.WriteLine("{0} ", type[i]);
}
// catch ArgumentNullException here
catch (ArgumentNullException e)
{
Console.Write("name is null.");
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
}
public class Person {
public class Student
{
// string name;
// int roll;
// string dept;
}
public class Teacher
{
// string name;
// string dept;
// int id;
}
}
Output:
NestedType of current type is:
Person+Student
Person+Teacher
例 2:
c sharp . c sharp . c sharp . c sharp
// C# program to demonstrate the
// Type.GetNestedTypes() 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(Animal);
// try-catch block for handling Exception
try {
// Getting array of Method by
// using GetMethods() Method
Type[] type = objType.GetNestedTypes();
// Display the Result
Console.WriteLine("NestedType of current type is: ");
for (int i = 0; i < type.Length; i++)
Console.WriteLine(" {0}", type[i]);
}
// catch ArgumentNullException here
catch (ArgumentNullException e)
{
Console.Write("name is null.");
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
}
public class Animal {
public class Cat {
// string breed;
// string color;
// string type;
}
public class Dog {
// string breed;
// string color;
// string type;
}
public class Mouse {
// string breed;
// string color;
// string type;
}
public interface Description {
string getBreed();
string getColor();
string getType();
bool isAlive();
}
}
Output
NestedType of current type is:
Animal+Cat
Animal+Dog
Animal+Mouse
Animal+Description
方法
当在派生类中重写时，使用指定的绑定约束，此方法用于搜索嵌套在当前类型中的类型。
语法:公共抽象类型[] GetNestedTypes(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，或者使用 Zero 来返回 null。 返回值:该方法返回一个类型对象数组，表示嵌套在当前类型中符合指定绑定约束的所有类型(搜索不是递归的)，如果没有找到符合绑定约束的嵌套类型，则返回类型类型的空数组。
例 1:
c sharp . c sharp . c sharp . c sharp
// C# program to demonstrate the
// Type.GetNestedTypes() 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(Animal);
// try-catch block for handling Exception
try {
// Getting array of Method by
// using GetMethods() Method
Type[] type = objType.GetNestedTypes();
// Display the Result
Console.WriteLine("NestedType of current type is: ");
for (int i = 0; i < type.Length; i++)
Console.WriteLine(" {0}", type[i]);
}
// catch ArgumentNullException here
catch (ArgumentNullException e)
{
Console.Write("name is null.");
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
}
public class Animal {
public class Cat {
// string breed;
// string color;
// string type;
}
public class Dog {
// string breed;
// string color;
// string type;
}
public class Mouse {
// string breed;
// string color;
// string type;
}
public interface Description {
string getBreed();
string getColor();
string getType();
bool isAlive();
}
}
Output:
NestedType of current type is:
Animal+Empty
例 2:
c sharp . c sharp . c sharp . c sharp
// C# program to demonstrate the
// Type.GetNestedTypes() 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(Person);
// try-catch block for handling Exception
try {
// Getting array of Method by
// using GetMethods() Method
Type[] type = objType.GetNestedTypes(BindingFlags.Public);
// Display the Result
Console.WriteLine("NestedType of current type is: ");
for (int i = 0; i < type.Length; i++)
Console.WriteLine(" {0}", type[i]);
}
// catch ArgumentNullException here
catch (ArgumentNullException e)
{
Console.Write("name is null.");
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
}
public class Person {
public class Student
{
// string name;
// int roll;
// string dept;
}
public class Teacher
{
// string name;
// string dept;
// int id;
}
}
Output:
NestedType of current type is:
Person+Student
Person+Teacher
参考:
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