属性是类、结构和接口的命名成员,类或结构中的成员变量或方法称为字段,属性是字段的扩展,使用相同的语法访问,它们使用访问器,通过它可以读取、写入或操作私有字段的值。
属性的访问器包含帮助获取或设置属性的可执行语句,访问器声明可以包含get访问器和/或set访问器。例如-
链接:https://www.learnfk.comhttps://www.learnfk.com/csharp/csharp-properties.html
来源:LearnFk无涯教程网
//Declare a Code property of type string: public string Code { get { return code; } set { code = value; } } //Declare a Name property of type string: public string Name { get { return name; } set { name = value; } } //Declare a Age property of type int: public int Age { get { return age; } set { age = value; } }
下面的示例演示属性的用法
using System; namespace learnfk { class Student { private string code = "N.A"; private string name = "not known"; private int age = 0; //Declare a Code property of type string: public string Code { get { return code; } set { code = value; } } //Declare a Name property of type string: public string Name { get { return name; } set { name = value; } } //Declare a Age property of type int: public int Age { get { return age; } set { age = value; } } public override string ToString() { return "Code=" + Code +", Name=" + Name + ", Age=" + Age; } } class ExampleDemo { public static void Main() { //Create a new Student object: Student s = new Student(); //Setting code, name and the age of the student s.Code = "001"; s.Name = "Zara"; s.Age = 9; Console.WriteLine("Student Info: {0}", s); //let us increase age s.Age += 1; Console.WriteLine("Student Info: {0}", s); Console.ReadKey(); } } }
编译并执行上述代码时,将生成以下输出-
Student Info: Code=001, Name=Zara, Age=9 Student Info: Code=001, Name=Zara, Age=10
抽象类可以具有抽象属性,该属性应该在派生类中实现。以下程序说明了此-
using System; namespace learnfk { public abstract class Person { public abstract string Name { get; set; } public abstract int Age { get; set; } } class Student : Person { private string code = "N.A"; private string name = "N.A"; private int age = 0; //Declare a Code property of type string: public string Code { get { return code; } set { code = value; } } //Declare a Name property of type string: public override string Name { get { return name; } set { name = value; } } //Declare a Age property of type int: public override int Age { get { return age; } set { age = value; } } public override string ToString() { return "Code=" + Code +", Name=" + Name + ", Age=" + Age; } } class ExampleDemo { public static void Main() { //Create a new Student object: Student s = new Student(); //Setting code, name and the age of the student s.Code = "001"; s.Name = "Zara"; s.Age = 9; Console.WriteLine("Student Info:- {0}", s); //let us increase age s.Age += 1; Console.WriteLine("Student Info:- {0}", s); Console.ReadKey(); } } }
编译并执行上述代码时,将生成以下输出-
Student Info: Code=001, Name=Zara, Age=9 Student Info: Code=001, Name=Zara, Age=10
祝学习愉快!(内容编辑有误?请选中要编辑内容 -> 右键 -> 修改 -> 提交!)