添加项目文件。

ExportExcelTest/Models/SheetTable.cs

@@ -0,0 +1,60 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+
+namespace CustomOpenAddins.Models
+{
+    /// <summary>
+    /// 表单
+    /// </summary>
+    public class SheetTable
+    {
+        public SheetTable(TypeOfSurrounding typeOfSurrounding)
+        {
+            TypeOfSurrounding = typeOfSurrounding;
+            MainCategories = new HashSet<PrimaryItem>();
+        }
+
+        public PrimaryItem this[int index]
+        {
+            get
+            {
+                if (index < 0 || index > MainCategories.Count - 1)
+                {
+                    throw new ArgumentOutOfRangeException("索引越界");
+                }
+                return MainCategories.ElementAt(index);
+            }
+        }
+
+        public HashSet<PrimaryItem> MainCategories { get; private set; }
+        public string Name => $"{TypeOfSurrounding.GetDescription()}工程量";
+
+        public TypeOfSurrounding TypeOfSurrounding { get; set; }
+
+        ///// <summary>
+        ///// 围岩类型
+        ///// </summary>
+        //public TypeOfSurrounding TypeOfSurrounding { get; }
+        //TypeOfSurrounding IItem.TypeOfSurrounding { get => TypeOfSurrounding; set => throw new NotImplementedException(); }
+
+        public PrimaryItem AddMain(string mainName)
+        {
+            PrimaryItem mainCategory = new PrimaryItem(mainName, this);
+            if (MainCategories == null)
+            {
+                MainCategories = new HashSet<PrimaryItem>();
+            }
+            MainCategories.Add(mainCategory);
+            return mainCategory;
+        }
+
+    }
+}
+