Fix Excel style.xml duplicate numFmtId, system error: An item with the same key has already been added. #772

Author: shps951023

samples/xlsx/TestIssue772.xlsx

@@ -2,6 +2,7 @@
 using MiniExcelLibs.Zip;
 using System;
 using System.Collections.Generic;
+using System.Diagnostics;
 
 namespace MiniExcelLibs.OpenXml
 {
@@ -83,7 +84,8 @@ public ExcelOpenXmlStyles(ExcelOpenXmlZip zip)
                                     type = typeof(DateTime?);
                                 }
 
-                                _customFormats.Add(numFmtId, new NumberFormatString(formatCode, type));
+                                if (!_customFormats.ContainsKey(numFmtId))
+                                    _customFormats.Add(numFmtId, new NumberFormatString(formatCode, type));
                                 reader.Skip();
                             }
                             else if (!XmlReaderHelper.SkipContent(reader))

src/MiniExcel/OpenXml/ExcelOpenXmlStyles.cs

@@ -19,6 +19,9 @@
 using Xunit.Abstractions;
 using static MiniExcelLibs.Tests.MiniExcelOpenXmlTests;
 using MiniExcelLibs.Picture;
+using DocumentFormat.OpenXml.Spreadsheet;
+using NPOI.Util;
+using TableStyles = MiniExcelLibs.OpenXml.TableStyles;
 
 namespace MiniExcelLibs.Tests;
 
@@ -4155,7 +4158,6 @@ public void TestIssue768()
     }
     /// <summary>
     /// https://github.com/mini-software/MiniExcel/issues/186
-    /// Optimize CleanXml method #751
     /// </summary>
     [Fact]
     public void TestIssue186()
@@ -4183,4 +4185,15 @@ public void TestIssue186()
         };
         MiniExcel.AddPicture(path, images);
     }
+
+    /// <summary>
+    /// https://github.com/mini-software/MiniExcel/issues/772
+    /// </summary>
+    [Fact]
+    public void TestIssue772()
+    {
+        var path = PathHelper.GetFile("xlsx/TestIssue772.xlsx");
+        var rows = MiniExcel.Query(path, sheetName: "Supply plan(daily)", startCell:"A1").Cast<IDictionary<string, object>>().ToArray();
+        Assert.Equal("01108083-1Delta", (string)rows[19]["C"]);
+    }
 }