What wrong with this code ?

[Polaris]

Hi Experts:

The program creates Panels and inicilize them. When I run the code below,
the program crashes (at the line commented below). Any help is appriciated.

Thanks in Advance!
Polaris
private void createPanels (int nPanelCount)
{
Panel [] parray = new Panel [nPanelCount];

for (int i = 0; i < nPanelCount; i++ )
{
parray[i].Parent = this; // dead here becaue parray[i] is null
parray[i].Dock = DockStyle.Left;
}
}

[Steven Nagy]

you need
parray[i] = new Panel();

[Vadym Stetsyak]

Strange, code seems to be correct.
Maybe something is wrong with Parent property?
OR
parray is class variable
I mean smth like this
public class C
{
T var;

public void method()
{
T var = new T();

var.DoSomething();
}
}
--
Regards, Vadym Stetsyak
www: http://vadmyst.blogspot.com

"Polaris" <et*******@hotmail.com> wrote in message
news:Ol**************@TK2MSFTNGP03.phx.gbl...

Hi Experts:

The program creates Panels and inicilize them. When I run the code below,
the program crashes (at the line commented below). Any help is
appriciated.

Thanks in Advance!
Polaris
private void createPanels (int nPanelCount)
{
Panel [] parray = new Panel [nPanelCount];

for (int i = 0; i < nPanelCount; i++ )
{
parray[i].Parent = this; // dead here becaue parray[i] is null
parray[i].Dock = DockStyle.Left;
}
}

[Jon Skeet [C# MVP]]

Polaris <et*******@hotmail.com> wrote:

The program creates Panels and inicilize them. When I run the code below,
the program crashes (at the line commented below). Any help is appriciated.

private void createPanels (int nPanelCount)
{
Panel [] parray = new Panel [nPanelCount];

for (int i = 0; i < nPanelCount; i++ )
{
parray[i].Parent = this; // dead here becaue parray[i] is null
parray[i].Dock = DockStyle.Left;
}
}

You need:

parray[i] = new Panel();

in the loop. Your comment is exactly right - parray[i] is null, because
you haven't told it to be anything else.

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet
If replying to the group, please do not mail me too

[Polaris]

Thanks but shouldn't the code below create 3 instances of Panel?
Panel[] parray = new Panel [3];

"Polaris" <et*******@hotmail.com> wrote in message
news:Ol**************@TK2MSFTNGP03.phx.gbl...

Hi Experts:

The program creates Panels and inicilize them. When I run the code below,
the program crashes (at the line commented below). Any help is
appriciated.

Thanks in Advance!
Polaris
private void createPanels (int nPanelCount)
{
Panel [] parray = new Panel [nPanelCount];

for (int i = 0; i < nPanelCount; i++ )
{
parray[i].Parent = this; // dead here becaue parray[i] is null
parray[i].Dock = DockStyle.Left;
}
}

[Steven Nagy]

No, it creates an array of size 3 that can handle objects of type
panel.
You still need to instantiate the objects.

This is also obviously evident in the error message you were getting,
indicating that your object was null.

Perhaps this would work (untested):
Panel[] parray = new Panel [3] {new Panel(), new Panel(), new Panel()};

[Bill Butler]

"Polaris" <et*******@hotmail.com> wrote in message
news:O7**************@TK2MSFTNGP02.phx.gbl...

Thanks but shouldn't the code below create 3 instances of Panel?
Panel[] parray = new Panel [3];

Nope

It creates an array of 3 panel References each set to null
You need to explicitly create the individual panel objects

Bill

[jasenfici]

Hi there,

I think the problem is that you are initializing an array of panels,
but this doesn't create the panels themselves, just the array to hold
them. Each element in the array should first have something like
parray[1]=new Panel(); then you can assign it's parent, etc.
Polaris wrote:

Hi Experts:

The program creates Panels and inicilize them. When I run the code below,
the program crashes (at the line commented below). Any help is appriciated.

Thanks in Advance!
Polaris
private void createPanels (int nPanelCount)
{
Panel [] parray = new Panel [nPanelCount];

for (int i = 0; i < nPanelCount; i++ )
{
parray[i].Parent = this; // dead here becaue parray[i] is null
parray[i].Dock = DockStyle.Left;
}
}

[Polaris]

Thanks everyone !

"Polaris" <et*******@hotmail.com> wrote in message
news:Ol**************@TK2MSFTNGP03.phx.gbl...

Hi Experts:

The program creates Panels and inicilize them. When I run the code below,
the program crashes (at the line commented below). Any help is
appriciated.

Thanks in Advance!
Polaris
private void createPanels (int nPanelCount)
{
Panel [] parray = new Panel [nPanelCount];

for (int i = 0; i < nPanelCount; i++ )
{
parray[i].Parent = this; // dead here becaue parray[i] is null
parray[i].Dock = DockStyle.Left;
}
}