From bfd7702939a162f62c46375762ceec9cd524f66a Mon Sep 17 00:00:00 2001
From: Sergey Chebotar <s.chebotar@gmail.com>
Date: Thu, 6 Apr 2023 08:29:39 +0300
Subject: DI Refactoring

---
 RhSolutions.ExcelExtensions/Rows.cs | 23 ++++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)

(limited to 'RhSolutions.ExcelExtensions/Rows.cs')

diff --git a/RhSolutions.ExcelExtensions/Rows.cs b/RhSolutions.ExcelExtensions/Rows.cs
index 1c0bc0d..c6d4c01 100644
--- a/RhSolutions.ExcelExtensions/Rows.cs
+++ b/RhSolutions.ExcelExtensions/Rows.cs
@@ -4,35 +4,40 @@ namespace RhSolutions.ExcelExtensions;
 
 public class Rows : IEnumerable<Row>
 {
-    public Range Range { get; }
     public Table ParentTable { get; }
     public int Length
     {
-        get => Range.Rows.Count;
+        get => _range.Rows.Count;
     }
+    private Row[] _rows;
+    private Range _range;
 
-    public Rows(Range range, Table parentTable)
+    public Rows(Table parentTable)
     {
-        Range = range;
         ParentTable = parentTable;
+        _range = parentTable.Range;
+        _rows = new Row[Length];
     }
 
     public Row this[int index]
     {
         get
         {
-            if (index < 0 || index + 1 > Range.Rows.Count)
+            if (_rows[index] == null)
             {
-                throw new IndexOutOfRangeException();
+                _rows[index] = new Row(_range.Rows[index + 1], ParentTable);
+                return _rows[index];
+            }
+            else
+            {
+                return _rows[index];
             }
-
-            return new Row(Range.Rows[index + 1], ParentTable);
         }
     }
 
     public IEnumerator<Row> GetEnumerator()
     {
-        return new RowsEnumerator(Range, ParentTable);
+        return new RowsEnumerator(this);
     }
 
     IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
-- 
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