protected virtual IEnumerable <LabelValuePair> GetSourcesSync(ValueProviderArgs args)
{
if (args.IsNullable)
{
NullValueLabelAttribute nullLabel = args.PropertyInfo.GetCustomAttribute <NullValueLabelAttribute>();
if (nullLabel == null)
{
nullLabel = enumType.GetTypeInfo().GetCustomAttribute <NullValueLabelAttribute>();
}
if (nullLabel == null)
{
nullLabel = new NullValueLabelAttribute();
}
if (nullLabel.IncludeNullValueLabel)
{
yield return(new LabelValuePair()
{
Label = nullLabel.Label,
Value = null
});
}
}
foreach (var member in enumType.GetTypeInfo().DeclaredFields.Where(i => i.IsStatic)) //The static decalared fields are our enum values
{
var label = member.Name;
var display = member.GetCustomAttribute <DisplayAttribute>();
if (display != null)
{
label = display.Name;
}
yield return(new LabelValuePair()
{
Label = label,
Value = member.Name
});
}
}
private IEnumerable <ILabelValuePair> GetNullSource(ValueProviderArgs args)
{
if (args.IsNullable)
{
//Include the null enum label since we can take null values
NullValueLabelAttribute nullLabel = args.PropertyInfo.GetCustomAttribute <NullValueLabelAttribute>();
if (nullLabel == null)
{
nullLabel = new NullValueLabelAttribute();
}
if (nullLabel.IncludeNullValueLabel)
{
yield return(new LabelValuePair()
{
Label = nullLabel.Label,
Value = null
});
}
}
}