CODEWITHSUNDEEP
c#.netwinformscombobox
user9402741
user9402741

Reputation:

How do I disable the first option in a ComboBox?

I have made a combobox with DropDownStyle property to DropDownList and I am trying to disable the first option of the dropdown (Read only) as this should be something like "choose an option".

How can I do it? The equivalent code in HTML should be something like this:

<option selected disabled>Select an option</option>

This is just a demo in html of what i actually want to achieve in c#.

enter image description here enter image description here

By the way I am using visual C# Windows Forms App (.NET Framework)

Upvotes: 0

Views: 1293

Answers (1)

Salah Akbari
Salah Akbari

Reputation: 39956

What about this:

private void comboBox1_DrawItem(object sender, DrawItemEventArgs e)
{
    var yourFont = new Font("Microsoft Sans Serif", 9, FontStyle.Regular);

    if (e.Index == 0)
    {
        e.Graphics.DrawString(comboBox1.Items[e.Index].ToString(), yourFont, Brushes.LightGray, e.Bounds);
    }
    else
    {
        e.DrawBackground();
        e.Graphics.DrawString(comboBox1.Items[e.Index].ToString(), yourFont, Brushes.Black, e.Bounds);
        e.DrawFocusRectangle();
    }
}

private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
    if (comboBox1.SelectedIndex == 0)
        comboBox1.SelectedIndex = -1;
}

You need to set the DrawMode property of the comboBox to OwnerDrawFixed also.

Upvotes: 3

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