我们如何在C#的同一类中从另一个构造函数调用一个构造函数？
在c#中使用此关键字从另一个构造函数调用一个构造函数
要调用父类中存在的构造函数，请使用base关键字
示例
class Demo{
public Demo(){
System.Console.WriteLine("Parameter less constructor called");
}
public Demo(int firstNumber, int secondNumber) : this(){
System.Console.WriteLine($"{firstNumber} {secondNumber}");
}
public Demo(int firstNumber, int secondNumber, int thirdNumber) : this(firstNumber, secondNumber){
System.Console.WriteLine($"{firstNumber} {secondNumber} {thirdNumber}");
}
}
class Program{
static void Main(){
Demo obj = new Demo(1, 2, 3);
Console.ReadLine();
}
}输出结果
Parameter less constructor called 1 2 1 2 3
要调用另一个类中存在的构造函数，请使用base关键字
示例
class DemoBase{
public DemoBase(int firstNumber, int secondNumber, int thirdNumber){
System.Console.WriteLine("Base class Constructor");
System.Console.WriteLine($"{firstNumber} {secondNumber} {thirdNumber}");
}
}
class Demo : DemoBase{
public Demo(int firstNumber, int secondNumber, int thirdNumber) : base(firstNumber, secondNumber, thirdNumber){
System.Console.WriteLine("Derived class Constructor");
System.Console.WriteLine($"{firstNumber} {secondNumber} {thirdNumber}");
}
}
class Program{
static void Main(){
Demo obj = new Demo(1, 2, 3);
Console.ReadLine();
}
}输出结果
Base class Constructor 1 2 3 Derived class Constructor 1 2 3