how to create a stronly typed array

roshan thas

Interface IPerson
{
}

Class A:IPerson
{}

Class B:IPerson()
{}

Class C
{
      Object[] obj=new Object[]
      {
       new A(),
       new B()
       };
}

How to convert this Object array to strongly typed array?

3 Replies

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Jignesh Trivedi12y ago
hi,

try
IPerson[] obj = new IPerson[] {
new A(),
new B()
};
foreach (IPerson person in obj)
{
//Process the data

}

hope this will help you.
0
Vulpes12y ago
Well, clearly, you can't convert it to an A[] or a B[] since there is no inheritance relationship between A and B.

However, as both classes implement IPerson, you can convert it to an IPerson[] which is more strongly typed than Object[].

Here's the code:

using System;

interface IPerson
{
}

class A:IPerson
{}

class B:IPerson
{}

class C
{
public Object[] MyMethod()
{
Object[] obj = new Object[]
{
new A(),
new B()
};

return obj;
}
}

class Program
{
static void Main()
{
C c = new C();
Object[] obj = c.MyMethod();
IPerson[] persons = new IPerson[obj.Length];
for(int i = 0; i < obj.Length; i++) persons[i] = (IPerson)obj[i];

// check it worked
foreach(IPerson person in persons) Console.WriteLine(person.GetType());
Console.ReadKey();
}
}

The output is:

A
B

0
Jaganathan Bantheswaran12y ago
Hi,

Here is nice example for collection. You could use try this for Array.
0