EnumExtensions.cs
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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Reflection;
using System.Text;
using Newtonsoft.Json;
namespace HHECS.WebCommon
{
public static class EnumExtensions
{
/// <summary>
/// 转换int
/// </summary>
/// <param name="enumType"></param>
/// <returns></returns>
public static int GetInt(Enum enumType)
{
return Convert.ToInt32(enumType);
}
/// <summary>
/// 转换josn
/// </summary>
/// <param name="enumType"></param>
/// <returns></returns>
public static string GetJsonEnum(this Type enumType)
{
return GetJsonEnum(enumType, null);
}
/// <summary>
/// 返回格式{"初始化":"10"}
/// </summary>
public static string GetJsonEnum(Type enumType, string alias)
{
int[] values = (int[])Enum.GetValues(enumType);
string[] names = Enum.GetNames(enumType);
string[] pairs = new string[values.Length];
for (int i = 0; i < values.Length; i++)
{
pairs[i] = $"\"{names[i]}\":{ values[i]}";
}
if (string.IsNullOrEmpty(alias))
alias = enumType.Name;
return string.Format("var {0}={{\n{1}\n}}", alias, string.Join(",\n", pairs));
}
/// <summary>
/// 获取对应的枚举描述（中文）
/// </summary>
public static string GetEnumDescriptionList<T>()
{
List<KeyValuePair<string, string>> result = new List<KeyValuePair<string, string>>();
FieldInfo[] fields = typeof(T).GetFields();
foreach (FieldInfo field in fields)
{
if (field.FieldType.IsEnum)
{
object[] attr = field.GetCustomAttributes(typeof(DescriptionAttribute), false);
string description = attr.Length == 0 ? field.Name : ((DescriptionAttribute)attr[0]).Description;
result.Add(new KeyValuePair<string, string>(field.Name, description));
}
}
string[] pairs = new string[result.Count];
int index = 0;
foreach (KeyValuePair<string, string> pair in result)
{
pairs[index] = $"\"{pair.Value}\":\"{ pair.Key}\"";
index++;
}
return string.Format("var {0}={{\n{1}\n}}", typeof(T).Name, string.Join(",\n", pairs));
}
public static string GetJsonEnums(this Type enumType)
{
return GetJsonEnums(enumType, null);
}
/// <summary>
/// 返回格式 {"10":"初始化"}
/// </summary>
public static string GetJsonEnums(Type enumType, string alias)
{
int[] values = (int[])Enum.GetValues(enumType);
string[] names = Enum.GetNames(enumType);
string[] pairs = new string[values.Length];
for (int i = 0; i < values.Length; i++)
{
pairs[i] = $"\"{values[i]}\": \"{ names[i] }\"";
}
if (string.IsNullOrEmpty(alias))
alias = enumType.Name;
return string.Format("var {0}={{\n{1}\n}}", alias, string.Join(",\n", pairs));
}
#region 枚举
/// <summary>
/// 获得枚举字段的特性(Attribute)，该属性不允许多次定义。
/// </summary>
public static string GetAttributeValue(this Enum thisValue)
{
FieldInfo field = thisValue.GetType().GetField(thisValue.ToString());
var attr = (Attribute.GetCustomAttribute(field, typeof(Desc)) as Desc);
if (attr == null) return string.Empty;
return (Attribute.GetCustomAttribute(field, typeof(Desc)) as Desc)?.Value;
}
/// <summary>
/// 获得枚举字段的特性(Attribute)，该属性不允许多次定义。
/// </summary>
public static T GetAttribute<T>(this Enum thisValue) where T : class
{
FieldInfo field = thisValue.GetType().GetField(thisValue.ToString());
var attr = (Attribute.GetCustomAttribute(field, typeof(T)) as T);
return attr;
}
/// <summary>
/// 获得枚举字段的名称。
/// </summary>
/// <returns></returns>
public static string GetName(this Enum thisValue)
{
return Enum.GetName(thisValue.GetType(), thisValue);
}
/// <summary>
/// 获得枚举字段的值。
/// </summary>
/// <returns></returns>
public static T GetValue<T>(this Enum thisValue)
{
return (T)Enum.Parse(thisValue.GetType(), thisValue.ToString());
}
#endregion
}
/// <summary>
/// 字段或属性的中文解释属性 使用：[Desc("描述")]
/// </summary>
[Serializable]
[AttributeUsage(AttributeTargets.Field, AllowMultiple = false, Inherited = false)]
public class Desc : Attribute
{
/// <summary>
/// 获得字段或属性的中文解释.
/// </summary>
/// <value>字段或属性的中文解释.</value>
public string Value { get; private set; }
/// <summary>
/// 初始化创建一个 <see cref="Desc"/> 类的实例, 用于指示字段或属性的解释说明.
/// </summary>
/// <param name="value">字段或属性的解释说明.</param>
public Desc(string value)
{
Value = value;
}
}
}