创建execl导入工具类的步骤

public class CellAttribute : Attribute
    {
        ///

        ///
        ///

        /// 显示名称
        ///
        public CellAttribute(string displayName, Type hander = null)
        {
            DisplayName = displayName;

            Hander = hander;
        }

        ///

        /// 显示名称
        ///

        public string DisplayName { get; set; }

        ///

        /// 类型
        ///

        public Type Hander { get; set; }
    }