C# |类型。获取属性()方法
原文:https://www . geesforgeks . org/c-sharp-type-get properties-method/
类型。获取属性()方法用于获取当前类型的属性。此方法的重载列表中有 2 种方法，如下所示:
-
GetProperties()方法 *GetProperties(BindingFlags) Method
GetProperties()方法
此方法用于返回当前类型的所有公共属性。
语法:公共系统。反射. property info[]GetProperties()；
返回值:此方法返回一个 PropertyInfo 对象数组，表示当前类型的所有公共属性，如果当前类型没有公共属性，则返回 PropertyInfo 类型的空数组。
以下程序说明了类型的使用。GetProperties() 方法:
例 1:
```cs // C# program to demonstrate the // Type.GetProperties() 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(string);
// try-catch block for handling Exception try {
// using GetProperties() Method PropertyInfo[] type = objType.GetProperties();
// Display the Result Console.WriteLine("Properties 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); } } } ```
Output:
```cs Properties of current type is: Int32 Length Char Chars [Int32]
```
例 2:
```cs // C# program to demonstrate the // Type.GetProperties() 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(System.Type);
// try-catch block for handling Exception try {
// using GetProperties() Method PropertyInfo[] type = objType.GetProperties();
// Display the Result Console.WriteLine("Properties of current type is: "); for (int i = 0; i < 10; 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); } } } ```
Output:
```cs Properties of current type is: System.Reflection.MemberTypes MemberType System.Type DeclaringType System.Reflection.MethodBase DeclaringMethod System.Type ReflectedType System.Runtime.InteropServices.StructLayoutAttribute StructLayoutAttribute System.Guid GUID System.Reflection.Binder DefaultBinder System.Reflection.Module Module System.Reflection.Assembly Assembly System.RuntimeTypeHandle TypeHandle
```
获取属性(绑定标签)方法
当在派生类中被重写时，使用指定的绑定约束，此方法用于搜索当前类型的属性。
语法:公共抽象系统。反射。属性信息[]获取属性(系统。反射. binding flags binding attr)； 这里，它需要一个由一个或多个 BindingFlags 组成的位掩码来返回 null，binding flags 指定如何执行搜索或 Zero。
返回值:如果当前类型没有属性，或者没有属性匹配绑定约束，则该方法返回一个 PropertyInfo 对象的数组，该数组表示当前类型中匹配指定绑定约束的所有属性，或者返回一个 PropertyInfo 类型的空数组。
例 1:
```cs // C# program to demonstrate the // Type.GetProperties(BindingFlags) // 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(Dog);
// using GetProperties() Method PropertyInfo[] type = objType.GetProperties(BindingFlags.Instance | BindingFlags.Public);
// Display the Result Console.WriteLine("Properties of current type is: "); for (int i = 0; i < type.Length; i++) Console.WriteLine(" {0}", type[i]); } }
// Defining class Dog public class Dog {
private string color, breed, type;
// Constructor public Dog(string color, string breed, string type) { this.color = color; this.breed = breed; this.type = type; }
// Color Property public String Color { get { return color; } }
// Breed Property public String Breed { get { return breed; } }
// Type Property public String Type { get { return type; } }
// BloodGroup Property private String BloodGroup { get { return "AB+"; } } } ```
Output:
```cs Properties of current type is: System.String Color System.String Breed System.String Type
```
例 2:
```cs // C# program to demonstrate the // Type.GetProperties(BindingFlags) // 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(Dog);
// using GetProperties() Method PropertyInfo[] type = objType.GetProperties(BindingFlags.Instance | BindingFlags.NonPublic);
// Display the Result Console.WriteLine("Properties of current type is: "); for (int i = 0; i < type.Length; i++) Console.WriteLine(" {0}", type[i]); } }
// Defining class Dog public class Dog {
private string color, breed, type, bp;
// Constructor public Dog(string color, string breed, string type, string bp) { this.color = color; this.breed = breed; this.type = type; this.bp = bp; }
// Color Property public String Color { get { return color; } }
// Breed Property public String Breed { get { return breed; } }
// Type Property public String Type { get { return type; } }
// BloodGroup Property protected String BloodGroup { get { return "AB+"; } }
// BloodPressure Property protected String BloodPressure { get { return bp; } } } ```
Output:
```cs Properties of current type is: System.String BloodGroup System.String BloodPressure
```
参考:
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