Fourth. Implementing data Updates for Windows programs

The fourth chapter realizes the data update of Windows program. Enumeration 1. What is an enumeration?

A set of descriptive names.

2. Why use enumerations?

Let's say we're writing sex.

int gender = 0;//0 on behalf of male

= 1;//1 on behalf of women

= 2;

= 3;

How do I use enumerations?

public enum Gender

{

Male,fmale

}

Gender.male;

Gender.fmale;

public class Student

{

private int age;

public int Age

{

Get{return This.age;}

Set{this.age=value;}

}

private string name;

public string Name

{

Get{return THIS.name;}

Set{this.name = value;}

}

Private Gender Gender;//Field

Public Gender gender//Property

{

Get{return This.gender;}

Set{this.gender=value}

}

public void Show ()

{

string s = String.Empty ();

if (this. gender.tostring () = = "Male")

{

s = "male";

}

Else

{

s = "female";

}

Console.WriteLine (this. Age+ "--" + this. Name + "--" + s);

}

}

public static void Main (string[] args)

{

Student stu = new Student ();

Stu. Age = 10;

Stu. Name = "Xiao Qiang";

Use of enumerations

Stu. Gender = Gender.male;

}

Where do you use enumerations?

Sex, Grade

public enum Grade

{

S1,s2,y2

}

3. Timers Timer

When the WinForm form loads, the time is displayed.

A.enable:true

b.inteval:1000, how long is the first time

C.time1_tick (Object Obj,eventargs s)//How often to invoke the method

Be a child and turn the book.

1). ImageList

2). PictureBox take a picture from the ImageList

3). Use the timer to realize the effect of changing pictures

Fourth. Implementing data Updates for Windows programs