I have a windows form. In that windows form i have a combo box. I have predefined items in the combo box as Add, Remove and Delete. I want to make the combo box auto expand on mouse hover. How can I do that? I noticed that auto expand code should be given in the mouse hover event of combo box. like this
private void comboBox1_MouseHover(object sender, EventArgs e)
{
}
but I don't know how to expand the combo box. Can anyone tell me how to do that?
Ok I got it done the expanding part
private void comboBox1_MouseHover(object sender, EventArgs e)
{
comboBox1.DroppedDown = true;
}
but I want to close the combo box when I leave the mouse pointer from the combo box.. How to do that?
Use the DroppedDown Property and make it true,
private void comboBox1_MouseHover(object sender, EventArgs e)
{
var box = sender as ComboBox ;
box.DroppedDown = true;
}
comboBox1.DroppedDown = true;
This has already been answered here Open ComboBox DropDown programmatically [duplicate]
which was actually a duplicate of Winforms: how to open combobox properly?
来源：https://stackoverflow.com/questions/25547274/how-to-make-combo-box-auto-expand-on-mouse-hover-and-close-when-the-mouse-leaves