What is static methods and how to use static methods in C#
Description
A static method can directly call only other static methods, but not an instance method of its class. A static method does not have a this reference.
Example
Example for static method
using System; /*www.j a va2s . co m*/
class StaticDemo {
// a static variable
public static int val = 100;
// a static method
public static int valDiv2() {
return val/2;
}
}
class MainClass {
public static void Main() {
Console.WriteLine("Initial value of StaticDemo.val is "
+ StaticDemo.val);
StaticDemo.val = 8;
Console.WriteLine("StaticDemo.val is " + StaticDemo.val);
Console.WriteLine("StaticDemo.valDiv2(): " +
StaticDemo.valDiv2());
}
}
The code above generates the following result.
Example 2
The following code returns the value from a static variable from static function.
using System;/*from www.j a v a 2 s . co m*/
class MyClass {
public MyClass()
{
instanceCount++;
}
public static int GetInstanceCount()
{
return(instanceCount);
}
static int instanceCount = 0;
}
class MainClass
{
public static void Main()
{
MyClass my = new MyClass();
Console.WriteLine(MyClass.GetInstanceCount());
}
}
The code above generates the following result.
Example 3
How to intialize value with static methods
using System;// w ww. jav a2s . c o m
public class MyClass
{
private static int InitX()
{
Console.WriteLine( "MyClass.InitX()" );
return 1;
}
private static int InitY()
{
Console.WriteLine( "MyClass.InitY()" );
return 2;
}
private static int InitA()
{
Console.WriteLine( "MyClass.InitA()" );
return 3;
}
private static int InitB()
{
Console.WriteLine( "MyClass.InitB()" );
return 4;
}
private int y = InitY();
private int x = InitX();
private static int a = InitA();
private static int b = InitB();
}
public class MainClass
{
static void Main()
{
MyClass a = new MyClass();
}
}
The code above generates the following result.
