89 lines
3.1 KiB
C#
89 lines
3.1 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.ComponentModel.DataAnnotations;
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using System.Linq;
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using System.Reflection;
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using Microsoft.AspNet.Mvc.Rendering;
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using Microsoft.Extensions.Localization;
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namespace Yavsc.Extensions
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{
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public static class EnumExtensions
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{
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/// <summary>
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/// Builds select items from an enum type
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/// </summary>
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/// <param name="type"></param>
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/// <param name="SR"></param>
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/// <param name="valueSelected"></param>
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/// <returns></returns>
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public static List<SelectListItem> GetSelectList (Type type, IStringLocalizer SR, Enum valueSelected)
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{
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var typeInfo = type.GetTypeInfo();
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var values = Enum.GetValues(type).Cast<Enum>();
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var items = new List<SelectListItem>();
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foreach (var value in values)
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{
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items.Add(new SelectListItem {
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Text = SR[GetDescription(value, typeInfo)],
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Value = value.ToString(),
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Selected = value == valueSelected
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});
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}
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return items;
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}
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public static List<SelectListItem> GetSelectList (Type type, IStringLocalizer SR, string selectedValue = null)
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{
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var typeInfo = type.GetTypeInfo();
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var values = Enum.GetValues(type).Cast<Enum>();
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var items = new List<SelectListItem>();
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foreach (var value in values)
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{
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var strval = value.ToString();
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items.Add(new SelectListItem {
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Text = SR[GetDescription(value, typeInfo)],
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Value = strval,
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Selected = strval == selectedValue
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});
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}
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return items;
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}
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public static string GetDescription(this Enum value, TypeInfo typeInfo )
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{
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var declaredMember = typeInfo.DeclaredMembers.FirstOrDefault(i => i.Name == value.ToString());
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var attribute = declaredMember?.GetCustomAttribute<DisplayAttribute>();
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return attribute == null ? value.ToString() : attribute.Description ?? attribute.Name;
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}
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public static string GetDescription(this Enum value)
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{
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var type = value.GetType();
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var typeInfo = type.GetTypeInfo();
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return GetDescription(value, typeInfo);
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}
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public static IEnumerable<string> GetDescriptions(Type type)
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{
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var values = Enum.GetValues(type).Cast<Enum>();
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var descriptions = new List<string>();
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foreach (var value in values)
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{
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descriptions.Add(value.GetDescription());
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}
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return descriptions;
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}
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public static Enum GetEnumFromDescription(string description, Type enumType)
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{
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var enumValues = Enum.GetValues(enumType).Cast<Enum>();
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var descriptionToEnum = enumValues.ToDictionary(k => k.GetDescription(), v => v);
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return descriptionToEnum[description];
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}
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}
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}
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