Mega Code Archive
0147 as operator
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as operator does the down cast. Rather than throws exception out it assigns the reference to null.
using System;
class Person
{
public string name;
}
class Employee : Person
{
public string companyName;
}
class Program
{
static void Main(string[] args)
{
Person p = new Person();
Employee e = p as Employee;
}
}
After the as operator we can use if statement to check the result.
using System;
class Person
{
public string name;
}
class Employee : Person
{
public string companyName;
}
class Program
{
static void Main(string[] args)
{
Person p = new Person();
Employee e = p as Employee;
if (e == null)
{
Console.WriteLine("successful");
}
}
}
The output:
successful
]]>