MsAddIns/ExportExcelTest/Models/SubItem.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace CustomOpenAddins.Models
{
    /// <summary>
    /// 二级开项
    /// </summary>
    public class SubItem : BaseItem
    {
        public SubItem(string name, PrimaryItem primary) : base(name)
        {
            Primary = primary;
            DetailCategories = new HashSet<DetailItem>();
        }

        public DetailItem this[int index]
        {
            get => DetailCategories.ElementAt(index);
        }
        public PrimaryItem Primary { get; set; }

        public override string ToString()
        {
            StringBuilder sb = new StringBuilder($"<子项>{Name};");
            if (DetailCategories.Count == 0)
            {
                return sb.Append("无;").ToString();
            }
            foreach (var item in DetailCategories)
            {
                sb.AppendLine($"{item}");
            }
            return sb.ToString();
        }

        public HashSet<DetailItem> DetailCategories { get; private set; }

        public DetailItem AddDetail(string detailName)
        {
            DetailItem detail = new DetailItem(detailName, this);
            if (DetailCategories == null)
            {
                DetailCategories = new HashSet<DetailItem>();
            }
            DetailCategories.Add(detail);
            return detail;
        }
        public void AddDetails(List<DetailItem> details)
        {
            if (DetailCategories == null)
            {
                DetailCategories = new HashSet<DetailItem>();
            }
            details.ForEach(x =>
            {
                x.SubItem = this;
                DetailCategories.Add(x);
            });
        }
    }
}