What is property ?
We all know C# is a object oriented programming language. And
in OOP we are familiar with a great feature called “Encapsulation”. In c#
concept of property gives us same flavor . Basically using property we can very
easily set and get value of class member. It gives us real time picture of data
binding with class object.
Types of property:
Basically property are two types.
Get property:
Using Get property we can get the value of data member of
class. The syntax of get property is
get{
return Membername
}
Set property
Using set property we can set value of class member .The
syntax of set property is
Set
{
Membername=value
}
}
Example of get and set property
class MyFriend
{
private string
FriendName;
private string
Street;
public string
P_FirstName
{
get{return
FriendName;}
set { FriendName = value;
}
}
public string
P_Street
{
get{return Street;}
set { Street = value;
}
}
}
class Program
{
static void Main(string[] args)
{
MyFriend objF = new
MyFriend();
objF.P_FirstName = "Sourav Kayal"; //Setting value in
property of FirstName Data member
objF.P_Street = "Kolkata"; //Setting
value in property of Street Data member
Console.Write("Name:"+
objF.P_FirstName + " Place:" +
objF.P_Street); //Geting value of Data Member using
property
Console.ReadLine();
}
}
In C# we can automatically implemented property. This feature indicates to the C# compiler
that a hidden field be generated and used as the backing store. Then, the get
and set statements are expanded to use that hidden field.
class MyFriend
{
public string
FriendName { get; set;
} //Created data member with propertys
}
class Program
{
static void Main(string[] args)
{
MyFriend objF = new
MyFriend();
objF.FriendName = "sourav Kayal"; //Set data member using property
Console.Write(objF.FriendName); //Fetching data value using property
Console.ReadLine();
}
}
Write Validation code using property
We can write validation
code within property. In set property before setting value to class member we
can implement our business validation logic. Here I have given a example of business validation using property.
class MyFriend
{
private string
MobileNumber;
public string
p_MobileNumber
{
get {return
MobileNumber ; }
set {
if (value.Length
< 10)
throw new Exception("Please enter 10 digit mobile number");
else
{
MobileNumber = value;
}
}
}
}
class Program
{
static void Main(string[] args)
{
MyFriend objF = new
MyFriend();
try
{
objF.p_MobileNumber = "12345";
}
catch (Exception
ex)
{
Console.Write(ex.Message);
}
Console.ReadLine();
}
}
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