Dear folks,
As i am working in C# Generics i found this little bit Strange
My code goes like this
Consider this as my Business Object
Public Class *BO*<type1,type2,type3>
{
private type1 Variable1;
private type2 Variable2;
private type3 Variable3;
public type1 val1
{
set { Variable1 = value; }
get { return Variable1; }
}
public type2 val2
{
set { Variable2 = value; }
get { return Variable2; }
}
public type3 val3
{
set { Variable3 = value; }
get { return Variable3; }
}
}
and Business Access Layer
Public Class *BAL:BO*<Object,Object,Object>//Because i don't want to confine
my self to work with particular Data type for this
//Class so i declared it as Object where if i can pass string,datetime,
int,etc and It ll do Boxing(data type to Object)
{
// take a look at this function as i am declaring a Function to Perform
"+" operation(for string -> Concatenation and for integer -> Sum)
public T getValue<T>()
{
T temp1 = (T)val1; // I am Type Casting my Object to this Type
T temp2 = (T)val2; // I am Type Casting my Object to this Type
T temp3 = temp1 + temp2; // I am Adding the values
return (temp3); // And returning with the Same Data type "T"
}
}
Declaring in aspx.cs as
obj.val1 = TextBox1.Text;
obj.val2 = TextBox2.Text;
Label1.Text = obj.getValue<string>(); // Here i am passing the generic data
type as String so the function will perform Concatenation
*ERROR: Operator '+' cannot be applied to operands of type 'T' and 'T'*
The Error shows (As of my Understanding) that T is Not a Valid Data type TO
PERFORM "+"
Clarifications required if possible:
1. Then Why the Data type T can be Type casted from an Object (T temp1 =
(T)val1;)
2. *Label1.Text *should assign to string type, as i am passing (*Label1.Text
= obj.getValue<int>();)* so passing type and the return type is recognized
as String so didn't throw any error but why it cant able to perform
Concatenation
*Is that A BUG From Microsoft or From My side ????*
--
regards
Sarvesh
