Thread: how to create a drop down menu?

Hi.
I have some questions about drop down menu. will you plz help me?!

1- Should I use a combo-box to create a drop down menu?
if so, how can I make it some how readonly? I mean, I dont want the user to be able to write new things. For example, Just if he/she enters 'a' all of the items which start with 'a', appear.

2- In a drop down menu the user can scroll the list by both mouse and arrow keys.
I want to send the selected item to another function at the select time but I dont know which event to use?!
By selected item I mean, the one which is clicked on while using mouse and the one which the user presses the enter key when he/she gets to it (while using arrow keys).

Thanks

Ps
I am using visual studio 2005

Yes, use a combobox, and set the DropDownStyle to DropDownList. Example:

Code:

this.comboBox1.DropDownStyle = ComboBoxStyle.DropDownList;

How about a context menu? I don't know if this is what you want, it's the menu where you right click somewhere and you get a menu. Through vs 2005 once you do that you can literally double click on the menu entry and get an event handler for that entry coded up for you. Then just do whatever you want with that menu selection.

Originally Posted by arian

2- In a drop down menu the user can scroll the list by both mouse and arrow keys.
I want to send the selected item to another function at the select time but I dont know which event to use?!
By selected item I mean, the one which is clicked on while using mouse and the one which the user presses the enter key when he/she gets to it (while using arrow keys).

I believe "SelectionChangeCommitted" is the event you want.

Example:

Code:

comboBox1.SelectionChangeCommitted += new EventHandler(comboBox1_SelectionChangeCommitted);

void comboBox1_SelectionChangeCommitted(object sender, EventArgs e)
{
    MessageBox.Show(((ComboBox)sender).Text);
}

When you click on an item in the combo box, the "SelectionChangeCommitted" event is called, which in this case shows the item text in a messagebox.

Thank you very much