c# - Set hint or watermark or default text for ComboBox without adding it as item

Question

So, I'm trying to put some text showing up on the ComboBox before it has a selection made by the user.

That text should not be an item, selectable by the user. The ComboBox has the DropDownList style on, so the user can't edit it.

This is currently what I have so far:

On the load:

this.comboBox1.Items.AddRange(new object[] {"Caixilharia em PVC", "Caixilharia em Alumínio" });

On the comboBox:

switch (comboBox1.SelectedIndex)
{
    case 0:
        Form2 newForm = new Form2();
        newForm.Show();
        this.Hide();
        break;

    case 1:
        Form3 anothernewForm = new Form3();
        anothernewForm.Show();
        this.Hide();
        break;
} 

Now, I want to show text, as on the following image:

I don't want the text to show up here, as an Item:

The only way I managed to do this, the text also appeared as an item.

I'll be waiting for your help.

Answer 1

You can simply set a String to the Text property of that Combobox. This will give you the desired behaviour. Keep in mind that your code must take into account that this combo may have not any item selected. You can check this by the SelectedIndex property that will be -1.