Get the first existing item in dropdown list C#

foreach (ListItem item in this.cmb.Items)
{
    if (item.Text.StartsWith("CH", StringComparison.OrdinalIgnoreCase))
    {
        item.Selected = true;
        break;
    }
    else
        item.Selected = false;
    }
}

Quote:

Assuming the list is already data bound you can simply set the SelectedValue property on your dropdown list.

Quote:

list.DataSource = GetListItems(); // <-- Get your data from somewhere.
list.DataValueField = "ValueProperty";
list.DataTextField = "TextProperty";
list.DataBind();

list.SelectedValue = myValue.ToString();

<label for="zodiac">Zodiac</label>
<p>
<input list="zodiac" name="zodiac">
<datalist id="zodiac">
<option value="Aries">
<option value="Taurus">
<option value="Gemini">
<option value="Cancer">
<option value="Leo">
<option value="Virgo">
<option value="Libra">
<option value="Scorpio">
<option value="Sagittarius">
<option value="Capricorn">
<option value="Aquarius">
<option value="Pisces">
</datalist>