//Model
    public class User
    {
        public User(string name)
        {
            this.Name = name;
        }

        public User(string name, string pwd)
        {
            this.Name = name;
            this.Pwd = pwd;
        }

        [ColumnType(Name = "Test", Hide = false)]
        public string Name { get; set; }

        [ColumnType(Hide = true)]
        public string Pwd { get; set; }
    }

        ExcelHelper helper = new ExcelHelper();

        // for test List
        helper.Add<User>("使用注解的ListSheet", list);

        helper.Add<User>("指定Column的ListSheet",  list,  new Column[] {
            new Column("Name", "姓名"),
            //use Fun
            new Column("Name", "姓名", ColumnType.Default, (t, index)=> {
                    var user = (User)t;
                    return user.Name + "---------" + user.Pwd;
            }),
        });

        // for test DataTable
        helper.Add("指定Column的Dt", dt, new Column[] {
            new Column("Name","姓名"),
            new Column("Pwd","密码"),
            new Column("Age","年龄", ColumnType.NumDecimal2),
            new Column("Formula", "测试公式", ColumnType.Number) { IsFormula=true },
        });

        helper.Add("使用Fun的Dt", dt, new Column[] {
                new Column("Name", "姓名", ColumnType.Default, (t, index)=> {
                    var dr = (DataRow)t;
                    return dr["Name"]+"---------"+ dr["Pwd"];
                }),
                new Column("Age","年龄", ColumnType.NumDecimal2),
                new Column("Age","测试公式",ColumnType.Default,(t, index)=> {
                    return "B" + index +"*B" + index;
                }) { IsFormula=true },
        });

        helper.Report();

        helper.ReportClient("/test.xls");