添加项目文件。

ExportExcelTest/Models/DetailItem.cs

@@ -0,0 +1,56 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace CustomOpenAddins.Models
+{
+    /// <summary>
+    /// 细类
+    /// </summary>
+    public class DetailItem : BaseItem
+    {
+        public DetailItem(string name, SubItem subItem) : base(name)
+        {
+            SubItem = subItem;
+            MeasureTypes = new HashSet<Measurement>();
+        }
+
+        public Measurement this[int index]
+        {
+            get => MeasureTypes.ElementAt(index);
+        }
+        /// <summary>
+        /// 细类，父级
+        /// </summary>
+        public SubItem SubItem { get; set; }
+        public override string ToString()
+        {
+            StringBuilder sb = new StringBuilder($"{nameof(DetailItem)}:{Name};");
+            if (MeasureTypes.Count == 0)
+            {
+                return sb.Append("无;").ToString();
+            }
+            foreach (var item in MeasureTypes)
+            {
+                sb.AppendLine($"{item}");
+            }
+
+            return sb.ToString();
+        }
+
+        public HashSet<Measurement> MeasureTypes { get; private set; }
+
+        public Measurement AddMeature(MeasurementUnit unit)
+        {
+            Measurement measure = new Measurement(unit, this);
+            if (MeasureTypes == null)
+            {
+                MeasureTypes = new HashSet<Measurement>();
+            }
+            MeasureTypes.Add(measure);
+            return measure;
+        }
+    }
+}
+