revert: 撤销泛型更改

Author: ArgoZhang

src/BootstrapBlazor/Extensions/EnumExtensions.cs

@@ -72,33 +72,6 @@ public static List<SelectedItem> ToSelectList(this Type type, SelectedItem? addi
         return ret;
     }
 
-    /// <summary>
-    /// 获取指定枚举类型的枚举值集合，默认通过 DisplayAttribute DescriptionAttribute 标签显示 DisplayName 支持资源文件 回退机制显示字段名称
-    /// </summary>
-    /// <param name="type"></param>
-    /// <param name="additionalItem"></param>
-    /// <returns></returns>
-    public static List<SelectedItem<TValue>> ToSelectList<TValue>(this Type type, SelectedItem<TValue>? additionalItem = null)
-    {
-        var ret = new List<SelectedItem<TValue>>();
-        if (additionalItem != null)
-        {
-            ret.Add(additionalItem);
-        }
-
-        if (type.IsEnum())
-        {
-            var t = Nullable.GetUnderlyingType(type) ?? type;
-            foreach (var field in Enum.GetNames(t))
-            {
-                var desc = Utility.GetDisplayName(t, field);
-                var val = (TValue)Enum.Parse(t, field);
-                ret.Add(new SelectedItem<TValue>(val, desc));
-            }
-        }
-        return ret;
-    }
-
     /// <summary>
     /// 判断类型是否为枚举类型
     /// </summary>

src/BootstrapBlazor/Misc/SelectedItem.cs

@@ -20,7 +20,7 @@ public SelectedItem() { }
     /// </summary>
     public SelectedItem(string value, string text)
     {
-        Value = value ?? "";
+        Value = value;
         Text = text;
     }