/// <summary>
/// Sets the datasource for enumerations.
/// </summary>
/// <typeparam name="TEnum">The type of the enum.</typeparam>
/// <param name="this">This ComboBox.</param>
/// <param name="insertNull">Insert null-object (use as non-selected).</param>
/// <param name="ignoreValues">Values not to be used.</param>
public static void DataSource <TEnum>(this ComboBox @this, bool insertNull = false, TEnum[] ignoreValues = null) where TEnum : struct
{
Contract.Requires(typeof(TEnum).IsEnum);
@this.DataSource(
(insertNull ? new[] { new Tuple <object, string>(null, null) } : new Tuple <object, string> [0])
.Concat(Enum.GetValues(typeof(TEnum)).Cast <object>()
.Where(i => ignoreValues == null || ignoreValues.Length == 0 || !ignoreValues.Contains((TEnum)i))
.Select(
i => {
var fieldInfo = typeof(TEnum).GetField(i.ToString());
Contract.Assert(fieldInfo != null, "Can not find field");
var attribute =
(DisplayNameAttribute)fieldInfo.GetCustomAttributes(typeof(DisplayNameAttribute), false).FirstOrDefault();
return(Tuple.Create(i, attribute?.DisplayName ?? i.ToString()));
})).ToArray(), nameof(Tuple <object, string> .Item2), nameof(Tuple <object, string> .Item1)
);
}
