C-Sharp Help on Default Properties..Help

[CodeToad]

I am using the Windows MCAD/MCSD book on VB.NET/VC.NET to refresh myself on
some C# concepts and I ran into one issue in the properties area I just do
not understand. In VB.NET this is easy to understand, in VC.NET I am lost,
can someone simplify it for me?

Here is some sample code:

public int this[int Index]
{
get
{
return intArray[Index];
}
set
{
intArray[Index] = value;
}
}

What is the dafault property? I cannot tell by reading this sample from the
book.

[Vijaye Raji]

This means, you can access your object just like how you would with an
array.

For example, if your class was named FooClass, you can do something like
this:

FooClass foo = new FooClass();
int i = foo[0];

When you dereference foo with foo[0], you are actually calling the property
you just defined.

-vJ

"CodeToad" <jb******@cox.net> wrote in message
news:ex6Eb.4557$Fg.3892@lakeread01...

I am using the Windows MCAD/MCSD book on VB.NET/VC.NET to refresh myself on some C# concepts and I ran into one issue in the properties area I just do
not understand. In VB.NET this is easy to understand, in VC.NET I am lost, can someone simplify it for me?

Here is some sample code:

public int this[int Index]
{
get
{
return intArray[Index];
}
set
{
intArray[Index] = value;
}
}

What is the dafault property? I cannot tell by reading this sample from the book.

[Hector Martinez]

you can define a property just like this:
public int MyProperty
{
get
{
return MyIntValue;
}
set
{
MyReturnValue = value;
}
}
What you see is another thing.

[Rob Teixeira [MVP]]

In vb.net, you create a "real" property (for example, an Item property) and
decorate it with the Default keyword, such as:

Default Public Property Item(Index As Integer) ...

You can then invoke this member by using either one of two syntax choices:

x = MyObject.Item(3)
or
x = MyObject(3)

Since Item is the Default property, you don't need to spell it out to invoke
it, and it helps you make properties that behave more or less like indexed
values.

C# doesn't have quite the same flexibility. In C# you can only create ONE
indexed property (and it is automatically named Item by default), though you
can overload it.
C# assumes you will invoke the "indexer" by using

x = MyObject[3];

Pity, because C# has no way to define multiple properties with paramters
(not just the DEFAULT indexer), and the VB.NET syntax is actually closer to
what the compiled IL looks like. To me, C# just made it confusing and
inflexible.

-Rob Teixeira [MVP]

"CodeToad" <jb******@cox.net> wrote in message
news:ex6Eb.4557$Fg.3892@lakeread01...

I am using the Windows MCAD/MCSD book on VB.NET/VC.NET to refresh myself on some C# concepts and I ran into one issue in the properties area I just do
not understand. In VB.NET this is easy to understand, in VC.NET I am lost, can someone simplify it for me?

Here is some sample code:

public int this[int Index]
{
get
{
return intArray[Index];
}
set
{
intArray[Index] = value;
}
}

What is the dafault property? I cannot tell by reading this sample from the book.