特性的使用拓展

using System;
using System.Security.Cryptography;

namespace ESUtility
{
    /// <summary>
    /// 类拓展方法
    /// </summary>
    public static class ClassExtendMethods
    {
        /// <summary>
        /// 获取类指定的Attribute，如果没有找到返回null.
        /// </summary>
        public static TAttr GetAttribute<TAttr>(this Type type)
            where TAttr : Attribute
        {
            var attributes = type.GetCustomAttributes(typeof(TAttr), false);
            if (attributes.Length > 0)
                return attributes[0] as TAttr;
            return null;
        }
    }
}

针对类特性的拓展

 

using System;
using System.ComponentModel;

namespace ESUtility
{
    /// <summary>
    /// 枚举拓展方法
    /// </summary>
    public static class EnumExtendMethods
    {
        /// <summary>
        /// 获取枚举指定的Attribute，如果没有找到返回null.
        /// </summary>
        public static TAttr GetAttribute<TAttr>(this Enum value)
            where TAttr : Attribute
        {
            var tempType = value.GetType();
            var attributes = tempType.GetMember(value.ToString())[0].GetCustomAttributes(typeof(TAttr), false);
            if (attributes.Length > 0)
                return attributes[0] as TAttr;
            return null;
        }

        /// <summary>
        /// 获取枚举的描述，由DescriptionAttribute指定
        /// </summary>
        public static string GetDescription(this Enum value)
        {
            var attr = value.GetAttribute<DescriptionAttribute>();
            if (attr != null)
                return attr.Description;
            return null;
        }

        public static TEnum ToEnum<TEnum>(this string str)
            where TEnum : struct
        {
            return ToEnum<TEnum>(str, default(TEnum));
        }

        public static TEnum ToEnum<TEnum>(this string str, TEnum defaultValue)
            where TEnum : struct
        {
            try
            {
                return (TEnum)Enum.Parse(typeof(TEnum), str);
            }
            catch { }
            return defaultValue;
        }
    }
}

枚举特性拓展

 

using System;

/// <summary>
/// 对应的属性页面-例子
/// </summary>
public class PropertyPanelAttribute : Attribute
{
    /// <summary>
    /// 属性面板名
    /// </summary>
    public Type UIPanelName { get; set; }

    /// <summary>
    /// 构造函数
    /// </summary>
    /// <param name="name"></param>
    public PropertyPanelAttribute(Type name)
    {
        UIPanelName = name;
    }
}

obase.GetType().GetAttribute<PropertyPanelAttribute>();