Editing items text an Listbox

[David Ichilov]

I've class derived from "Object" class, with ToString() method overriden
itc. ,
now i add object of this class to Windows.Forms.ListBox.Items
collection, and it works fine, displaying what ToString() should return...

then the program is in the runtime, i chage fields of this object in thet
way ( (MyClass)ListBox.SelectedItem ).SomeProperty = newValue;
so ToString() method now will return new value, but text showed in a listbox
itself not changes, i tried to call ListBox.Update(), adn ListBox.Text = "",
but nothing worked...
What can i do?

[PL Patrick]

Hi,

int selectedIndex = ListBox.SelectedIndex;
MyClass selectedItem = (MyClass)ListBox.SelectedItem;
.....
selectedItem.Property = newProperty;
.....
ListBox.Items[selectedIndex] = selectedItem;

I've class derived from "Object" class, with ToString() method overriden
itc. ,
now i add object of this class to Windows.Forms.ListBox.Items
collection, and it works fine, displaying what ToString() should return...

then the program is in the runtime, i chage fields of this object in thet
way ( (MyClass)ListBox.SelectedItem ).SomeProperty = newValue;
so ToString() method now will return new value, but text showed in a listbox itself not changes, i tried to call ListBox.Update(), adn ListBox.Text = "", but nothing worked...
What can i do?

[David Ichilov]

i've done like you proposed, it's my code:

CheesDrawing.Player.csPlayer Player =
(CheesDrawing.Player.csPlayer)lstPlayers.SelectedI tem;
Player.Name = txtName.Text;
lstPlayers.Items[lstPlayers.SelectedIndex] = Player;

third line throws exeption:
"object reference not set to an instance of an object"

"PL Patrick" <ne********@user.pl> wrote in message
news:%2****************@TK2MSFTNGP10.phx.gbl...

Hi,

int selectedIndex = ListBox.SelectedIndex;
MyClass selectedItem = (MyClass)ListBox.SelectedItem;
....
selectedItem.Property = newProperty;
....
ListBox.Items[selectedIndex] = selectedItem;

I've class derived from "Object" class, with ToString() method overriden
itc. ,
now i add object of this class to Windows.Forms.ListBox.Items
collection, and it works fine, displaying what ToString() should return...
then the program is in the runtime, i chage fields of this object in thet way ( (MyClass)ListBox.SelectedItem ).SomeProperty = newValue;
so ToString() method now will return new value, but text showed in a

listbox

itself not changes, i tried to call ListBox.Update(), adn ListBox.Text =

"",

but nothing worked...
What can i do?