C# 利用反射和特性 来做一些事情

特性代码：

    [AttributeUsage(AttributeTargets.Class, AllowMultiple = false, Inherited = false)]
    public class TableAttribute : Attribute
    {
        private string _TableName;
        /// <summary>
        /// 映射的表名
        /// </summary>
        public string TableName
        {
            get { return _TableName; }
        }
        /// <summary>
        /// 定位函数映射表名；
        /// </summary>
        /// <param name="table"></param>
        public TableAttribute(string table)
        {
            _TableName = table;
        }

    }

 

 [AttributeUsage(AttributeTargets.Property, AllowMultiple = false, Inherited = false)]
    public class FieldAttribute : Attribute
    {
        private string _Fields;
        private string _Description;
        private bool _IsEnable;

        public string Fields
        {
            get { return _Fields; }

        }
        public bool IsEnable
        {
            get { return _IsEnable; }

        }
        public string  Description
        {
            get { return _Description; }

        }
        public FieldAttribute(string fields, string description, bool isEnable)
        {
            _Fields = fields;
            _Description = description;
            _IsEnable = isEnable;
        }
    }

应用的模型类库

        [Key]
        //[Field("表字段名称", "字段的说明", 是否在列表显示（true/false）)]
        [Field("ID", "用户标识",false)]
        public string ID { get; set; }

        [Field("LoginName", "登录名",true)]
        public string LoginName { get; set; }

        [Field("Password", "密码",false)]
        public string Password { get; set; }

        [Field("Name", "姓名",true)]
        public string Name { get; set; }

调用的代码：

        public static List<Columns> GetField_AttributeStr<T>() where T : class
        {
            List<Columns> columns = new List<Columns>();
            Type t = GetPropertyType(typeof(T));
            PropertyInfo[] Prs = t.GetProperties();
            foreach (dynamic p in Prs)
            {
                object[] Fields = p.GetCustomAttributes(false);
                foreach (dynamic attrs in Fields)
                {
                    if (attrs is FieldAttribute)
                    {
                        FieldAttribute column = attrs as FieldAttribute;
                        var model = new Columns();
                        model.field = column.Fields;
                        model.title = column.Description;
                        model.sortable = false;
                        if (model.title == "排序" || model.title == "创建时间" || model.title == "修改时间")
                        {
                            model.sortable = true;
                        }
                        switch (column.IsEnable)
                        {
                            case true:
                                columns.Add(model);
                                break;
                            default:
                                break;
                        }
                    }
                }
            }
            return columns;
        }