Enum新增說明並將說明和int值放在集合中並選定當前項
阿新 • • 發佈：2018-12-25
實現：
public static class EnumExtension { /// <summary> /// 獲取列舉的描述，需要DescriptionAttribute屬性 /// </summary> /// <param name="e"></param> /// <returns></returns> public static string GetDescription(this Enum e) { //獲取列舉的Type型別物件 var type = e.GetType(); //獲取列舉的所有欄位 var fields = type.GetFields(); //遍歷所有列舉的所有欄位 foreach (var field in fields) { if (field.Name != e.ToString()) { continue; } //第二個引數true表示查詢EnumDisplayNameAttribute的繼承鏈 if (field.IsDefined(typeof(DescriptionAttribute), true)) { var attr = field.GetCustomAttribute(typeof(DescriptionAttribute), false) as DescriptionAttribute; if (attr != null) { return attr.Description; } } } //如果沒有找到自定義屬性，直接返回屬性項的名稱 return e.ToString(); } /// <summary> /// 根據列舉獲取下拉框列表 /// </summary> /// <param name="en"></param> /// <returns></returns> public static List<KeyValue> GetSelectList(this Enum en) { var list = new List<KeyValue>(); foreach (var e in Enum.GetValues(en.GetType())) { list.Add(new KeyValue() { Value = GetDescription(e as Enum), Key = ((int)e).ToString(), IsSelected = e.ToString() == en.ToString() }); } return list; } } public class KeyValue { public string Key { get; set; } public string Value { get; set; } public bool IsSelected { get; set; } }
呼叫：
class Program { static void Main(string[] args) { var list = OrderState.NoPay.GetSelectList(); foreach (var item in list) { string str = string.Format("Key:{0},Value:{1},Selected:{2}", item.Key, item.Value, item.IsSelected); Console.WriteLine(str); } Console.ReadKey(); } } public enum OrderState { [Description("未付款")] NoPay = 0, [Description("支付成功")] PaySuccess = 1, [Description("支付失敗")] PayError = 2, [Description("已退款")] PayReturn = 3 }
結果：
