/// <summary>
/// 将 Enum 的值放入 dropdown
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="ddl"></param>
/// <param name="valueAsInteger"></param>
public static void FromEnum <T>(this DropDownList ddl, Nullable <T> defaultValue = null,
Func <T, ListItem, bool> itemSet = null, bool valueAsInteger = false) where T : struct, IComparable, IConvertible, IFormattable
{
ddl.Items.Clear();
DefinitionHelper.GenerateEnums <T>().ForEach(i =>
{
var item = new ListItem()
{
Text = i.Caption, Value = i.Name
};
var v = i.Value.ToIntOrNull().Value;
if (valueAsInteger)
{
item.Value = v.ToString();
}
item.Selected = (defaultValue.HasValue && defaultValue.Value.Equals(v));
if (itemSet != null)
{
if (itemSet((T)(v as object), item))
{
ddl.Items.Add(item);
}
}
else
{
ddl.Items.Add(item);
}
});
}
/// <summary>
/// 将 Enum 的值放入 dropdown
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="ddl"></param>
/// <param name="valueAsInteger"></param>
public static void FromEnum <T>(this ASPxComboBox cbx,
Nullable <T> defaultValue = null,
Func <T, ListEditItem, bool> itemSet = null, bool valueAsInteger = false, bool canBeNull = false) where T : struct, IComparable, IConvertible, IFormattable
{
cbx.Items.Clear();
DefinitionHelper.GenerateEnums <T>().ForEach(i =>
{
var item = new ListEditItem()
{
Text = i.Caption, Value = i.Name
};
var v = i.Value.ToIntOrNull().Value;
if (valueAsInteger)
{
item.Value = v;
}
if (defaultValue.HasValue)
{
if (valueAsInteger)
{
cbx.Value = (int)(defaultValue.Value as object);
}
else
{
cbx.Value = defaultValue.Value;
}
}
if (itemSet != null)
{
if (itemSet((T)(v as object), item))
{
cbx.Items.Add(item);
}
}
else
{
cbx.Items.Add(item);
}
});
if (canBeNull)
{
if (cbx.Buttons.Count == 0)
{
var b = cbx.Buttons.Add();
b.Index = 0;
b.Text = "X";
b.Width = 15;
}
if (string.IsNullOrEmpty(
cbx.ClientSideEvents.ButtonClick))
{
cbx.ClientSideEvents.ButtonClick = "function(s,e){{s.SelectIndex(-1);}}";
}
}
}
public DefinitionItemHelper(Type type)
{
_Items.AddRange(DefinitionHelper.GenerateItems(type));
_MasterItem = DefinitionHelper.GenerateItem(type);
}