Static members and Non-static members in C#
Static keyword is a modifier which can use to define types and member of types. So those members doesn't require object of a class for initialization and execution. A class is a collection of members where the members of a class are divided into two categories. Those are Static members and Non-static members/Instance members.
The members of a class who requires object of the class for initialization as well as execution are known as Non-static/Instance members. Whereas Static members doesn't require object of the class.
A variable that is declared using static modifier or a variable that is declared under static block are static variables and rest of the variables are instance variables.
int empId = 100;
static string companyName = "ABC";
As shown above we have one instance variable empId and one static variable companyName.
static void GetEmpInfo()
{
int empId;
string name;
}
As shown, we have static method GetEmpInfo() and all members within the method are static by default.
A static variable gets initialized immediately once the execution of class starts, whereas an instance variable gets initialized when the object of a class is created only and for each object new instance of a variable will create.
To access the static members we have to use the class name as shown below.
public class EmpInfo
{
public static int id; ; //static members
}
protected void Page_Load(object sender, EventArgs e)
{
int id = EmpInfo.id
}
To access the instance members we have to create the object of the class shown below.
public class EmpInfo
{
public int id; //instance members
}
protected void Page_Load(object sender, EventArgs e)
{
EmpInfo objEmp = new EmpInfo();
int id = objEmp.id;
}
