MVC4 Basic enumeration generation DropDownList practical tips
- 2020-06-03 06:13:00
- OfStack
In MVC development, enumeration types are often used, usually in DropDownList, and each conversion is not a good idea. This functionality is implemented through extensions.
public static class ExSelectListItem
{
public static List<SelectListItem> ToSelectListItem(this Enum valueEnum)
{
return (from int value in Enum.GetValues(valueEnum.GetType())
select new SelectListItem
{
Text = Enum.GetName(valueEnum.GetType(), value),
Value = value.ToString()
}).ToList();
}
public static List<SelectListItem> ToSelectListItem(this Enum valueEnum, string selectName)
{
return (from int value in Enum.GetValues(valueEnum.GetType())
select new SelectListItem
{
Text = Enum.GetName(valueEnum.GetType(), value),
Value = Enum.GetName(valueEnum.GetType(), value),
Selected = Enum.GetName(valueEnum.GetType(), value) == selectName ? true : false
}).ToList();
}
}
We extend the Enum method to automatically convert MVC to foreground List < SelectListItem > The application of
Front Desk use:
@Html.DorpDownList((List < SelectListItem > )TempData[" Enumerated Types "])
It looks good.
Background code application:
TempData[" Enumeration Type "] = ((Enum) enumeration type. Default type).ToSelectListItem ();
By extending the second method, we pass the enumerated type name to determine the selected status.
TempData [" enumeration "] = ((Enum) enumerated type. The default type). ToSelectListItem (type "default");