How to clean the combobox without losing the items?

Question

How to clean the combobox without losing the items?

I try to clean up the combobox in C#, but either it eliminates all options or the selected one, as I do to clean without losing items?

Answer 1

For this you must set the selectedIndex to the first value of your combo box. In this case it would be the index "-1".

Example:

  comboBox1.SelectedIndex = -1;

Answer 2

You may be saving, for example, 20 items from your comboBox1 in a vector and then you can erase the data contained in the comboBox1.

Declare as global variable

string[] items = new string[20];

To save the data and delete it from comboBox1

int i = 0;
for (i = 0; i <= 19; i++)
{
    comboBox1.SelectedIndex = i;
    items[i] = comboBox1.SelectedItem.ToString();
}
comboBox1.Items.Clear();

To return the data to comboBox1

int i = 0;
comboBox1.Items.Clear();
for (i = 0; i <= 19; i++)
{
    comboBox1.Items.Add(items[i]);
}