feat(ExcelNumberFormat): extend the SectionType

src/MiniExcel/OpenXml/ExcelOpenXmlSheetWriter.DefaultOpenXml.cs

@@ -217,12 +217,17 @@ private Tuple<string, string, string> GetCellValue(int rowIndex, int cellIndex,
 
             if (TypeHelper.IsNumericType(type))
             {
-                var dataType = _configuration.Culture == CultureInfo.InvariantCulture ? "n" : "str";
-                string cellValue;
+                var cellValue = GetNumericValue(value, type);
 
-                cellValue = GetNumericValue(value, type);
-
-                return Tuple.Create("2", dataType, cellValue);
+                if (columnInfo == null || columnInfo.ExcelFormat == null)
+                {
+                    var dataType = _configuration.Culture == CultureInfo.InvariantCulture ? "n" : "str";
+                    return Tuple.Create("2", dataType, cellValue);
+                }
+                else
+                {
+                    return Tuple.Create(columnInfo.ExcelFormatId.ToString(), (string)null, cellValue);
+                }
             }
 
             if (type == typeof(bool))

src/MiniExcel/OpenXml/Styles/SheetStyleBuildContext.cs

@@ -127,7 +127,7 @@ public async Task InitializeAsync(SheetStyleElementInfos generateElementInfos)
             NewXmlWriter = XmlWriter.Create(newXmlWriterStream, new XmlWriterSettings() { Indent = true, Encoding = _encoding, Async = true });
 
             GenerateElementInfos = generateElementInfos;
-            ColumnsToApply = SheetStyleBuilderHelper.GenerateStyleIds(OldElementInfos.CellXfCount + generateElementInfos.CellXfCount, _columns);
+            ColumnsToApply = SheetStyleBuilderHelper.GenerateStyleIds(OldElementInfos.CellXfCount + generateElementInfos.CellXfCount, _columns).ToArray();//这里暂时加ToArray，避免多次计算，如果有性能问题再考虑优化
             CustomFormatCount = ColumnsToApply.Count();
 
             initialized = true;