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This article introduces the relevant knowledge of "how to construct functions in C#". In the operation of actual cases, many people will encounter such a dilemma. Then let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

C# constructors are generally divided into static C# constructors and instance C# constructors. Of course, the instance C# constructor is executed when the class is instantiated, which is easy to understand, while the static C# constructor is something special:

The static C # constructor is executed only once. In C #, the static C # constructor usually executes before the member of the secondary call class. One reason for writing a static C# constructor for a class is that the class has some static fields or properties that need to be initialized from an external source before * using the class. The .NET runtime does not ensure that the static C# constructor is executed, but runs at most once.

Static C # constructor can not take any parameters, there is no access modifier, other C # code never calls it is always called by the C# runtime, so the modifier does not make any sense, a class can only have one static C # constructor, static C # constructor can only access static members of the class, not instance members

If a C # constructor with parameters is provided, the compiler does not automatically provide a default C # constructor, but only if no C # constructor is defined.

The static C# constructor executes when the class is loaded, while the instance C# constructor executes when an instance of the class is created, so it can safely coexist in the class, even if the parameter list is the same.

(2) call the C# constructor from other C# constructors

Sometimes there are several C # constructors in a class to accommodate some optional parameters, which contain some common code, for example:

Class car... {private string description; private unit wheels; public Car (string model,unit nWheels)... {this.desciption=description; this.nWheels=nWheels;} public car (string model)... {this.description=description; this.nWheels=4;}}

The two C # constructors in the above class initialize the same field. C # has a special syntax that squares all the above code together, saying that the C # constructor initializer can be implemented:

Class car... {private string description; private unit wheels; public Car (string model,unit nWheels)... {this.desciption=description; this.nWheels=nWheels;} public car (string model): this (model,4)... {}}

The above this keyword only calls the C # constructor with the most matching parameters. Note here that the construction initializer executes before the C # constructor!

Suppose you run the following code:

Car myCar=new Car (\ "Proton Persona\"); "how to construct functions in C#" is introduced here. Thank you for reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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