internal void AddFilter(IEnumFilter filter)
{
_filters.Add(filter);
}
/// <summary>
/// 生成普通枚举类型的枚举值列表
/// </summary>
/// <param name="htmlHelper"></param>
/// <param name="name"></param>
/// <param name="enumType"></param>
/// <param name="filter"></param>
/// <param name="enumValue"></param>
/// <param name="optionLabel"></param>
/// <param name="includeZero"></param>
/// <param name="htmlAttributes"></param>
/// <returns></returns>
private static MvcHtmlString StandardEnumValueList(HtmlHelper htmlHelper, string name,
Type enumType, IEnumFilter filter, int enumValue, string optionLabel, bool includeZero, object htmlAttributes)
{
IList<SelectListItem> items = new List<SelectListItem>();
foreach (FieldInfo fieldInfo in enumType.GetFields(BindingFlags.Public | BindingFlags.Static))
{
// 筛选
if (filter != null)
{
if (!filter.Test(fieldInfo))
{
continue;
}
}
object value = fieldInfo.GetValue(null);
int intValue = Convert.ToInt32(value);
if (!includeZero && intValue == 0)
{
continue;
}
object[] attributes = fieldInfo.GetCustomAttributes(typeof(DescriptionAttribute), true);
if (attributes.Length == 0)
{
items.Add(new SelectListItem()
{
Value = intValue.ToString(),
Text = value.ToString(),
Selected = (enumValue == intValue),
});
}
else
{
DescriptionAttribute description = attributes[0] as DescriptionAttribute;
items.Add(new SelectListItem()
{
Value = intValue.ToString(),
Text = description.Description,
Selected = (enumValue == intValue),
});
}
}
object currentValue = htmlHelper.ViewData.Eval(name);
htmlHelper.ViewData[name] = enumValue;
MvcHtmlString result = htmlHelper.DropDownList(name, items, optionLabel, htmlAttributes);
htmlHelper.ViewData[name] = currentValue;
return result;
}
/// <summary>
/// Define a custom filter. It is recommended to use the <c>Custom</c> EXTENSION method
/// instead, for a simple LINQ-based filter.
/// </summary>
public EnumGenie Custom(IEnumFilter filter)
{
_enumGenie.AddFilter(filter);
return(_enumGenie);
}
/// <summary>
/// 根据 enumType 的指示绘制以 value 为默认值的下拉框。
/// name 只用于控件标识及名称
/// </summary>
/// <param name="htmlHelper"></param>
/// <param name="name"></param>
/// <param name="enumType"></param>
/// <param name="filter"></param>
/// <param name="value"></param>
/// <param name="optionLabel"></param>
/// <param name="htmlAttributes"></param>
/// <returns></returns>
public static MvcHtmlString EnumValueList(this HtmlHelper htmlHelper, string name,
Type enumType, IEnumFilter filter, object value, string optionLabel, object htmlAttributes)
{
return EnumValueList(htmlHelper, name, enumType, filter, value, optionLabel, string.IsNullOrEmpty(optionLabel), htmlAttributes);
}
/// <summary>
/// 根据 enumType 的指示绘制以 value 为默认值的下拉框。
/// name 只用于控件标识及名称
/// </summary>
/// <param name="htmlHelper"></param>
/// <param name="name"></param>
/// <param name="enumType"></param>
/// <param name="filter"></param>
/// <param name="value"></param>
/// <param name="optionLabel"></param>
/// <param name="includeZero"></param>
/// <param name="htmlAttributes"></param>
/// <returns></returns>
public static MvcHtmlString EnumValueList(this HtmlHelper htmlHelper, string name,
Type enumType, IEnumFilter filter, object value, string optionLabel, bool includeZero, object htmlAttributes)
{
int enumValue = int.MinValue;
if (value != null)
{
if (value is string)
{
string strValue = (string)value;
if (strValue.Length >= 0)
{
enumValue = Convert.ToInt32(strValue);
}
}
else
{
enumValue = Convert.ToInt32(value);
}
}
return StandardEnumValueList(htmlHelper, name, enumType, filter, enumValue, optionLabel, includeZero, htmlAttributes);
}
/// <summary>
/// 根据 enumType 的指示绘制以 value 为默认值的下拉框。
/// name 只用于控件标识及名称
/// </summary>
/// <param name="htmlHelper"></param>
/// <param name="name"></param>
/// <param name="enumType"></param>
/// <param name="filter"></param>
/// <param name="value"></param>
/// <param name="optionLabel"></param>
/// <param name="includeZero"></param>
/// <returns></returns>
public static MvcHtmlString EnumValueList(this HtmlHelper htmlHelper, string name,
Type enumType, IEnumFilter filter, object value, string optionLabel, bool includeZero)
{
return EnumValueList(htmlHelper, name, enumType, filter, value, optionLabel, includeZero, null);
}
/// <summary>
/// 根据 enumType 的指示绘制以 value 为默认值的下拉框。
/// name 只用于控件标识及名称
/// </summary>
/// <param name="htmlHelper"></param>
/// <param name="name"></param>
/// <param name="enumType"></param>
/// <param name="filter"></param>
/// <param name="value"></param>
/// <returns></returns>
public static MvcHtmlString EnumValueList(this HtmlHelper htmlHelper, string name, Type enumType, IEnumFilter filter, object value)
{
return EnumValueList(htmlHelper, name, enumType, filter, value, null);
}
/// <summary>
/// 根据 enumType 的指示绘制下拉框；在 ViewData 和 Model 中根据 name 查找属性，并将该属性值作为下拉框的默认值。
/// 不要求属性必须存在
/// </summary>
/// <param name="htmlHelper"></param>
/// <param name="name"></param>
/// <param name="enumType"></param>
/// <param name="filter"></param>
/// <param name="optionLabel"></param>
/// <param name="includeZero"></param>
/// <param name="htmlAttributes"></param>
/// <returns></returns>
public static MvcHtmlString EnumValueList(this HtmlHelper htmlHelper, string name, Type enumType, IEnumFilter filter, string optionLabel, bool includeZero, object htmlAttributes)
{
object propertyValue = null;
PropertyInfo propertyInfo = null;
Type propertyType = ExtensionHelper.RetrieveProperty(htmlHelper, name, out propertyValue, out propertyInfo);
return EnumValueList(htmlHelper, name, enumType, filter, propertyValue, optionLabel, includeZero, htmlAttributes);
}
/// <summary>
/// 根据 enumType 的指示绘制下拉框；在 ViewData 和 Model 中根据 name 查找属性，并将该属性值作为下拉框的默认值。
/// 不要求属性必须存在
/// </summary>
/// <param name="htmlHelper"></param>
/// <param name="name"></param>
/// <param name="enumType"></param>
/// <param name="filter"></param>
/// <param name="optionLabel"></param>
/// <returns></returns>
public static MvcHtmlString EnumValueList(this HtmlHelper htmlHelper, string name, Type enumType, IEnumFilter filter, string optionLabel)
{
return EnumValueList(htmlHelper, name, enumType, filter, optionLabel, (object)null);
}
/// <summary>
/// 根据 enumType 的指示绘制下拉框；在 ViewData 和 Model 中根据 name 查找属性，并将该属性值作为下拉框的默认值。
/// 不要求属性必须存在
/// </summary>
/// <param name="htmlHelper"></param>
/// <param name="name"></param>
/// <param name="enumType"></param>
/// <param name="filter"></param>
/// <returns></returns>
public static string EnumValueList(this HtmlHelper htmlHelper, string name, Type enumType, IEnumFilter filter)
{
return EnumValueList(htmlHelper, name, enumType, filter, (string)null);
}
