Initial commit of the ClosedXML library

Establishes the foundational structure, core Excel functionality, and tooling. - Implements base components for cells, ranges, columns, and rows. - Integrates a custom calculation engine with a wide range of Excel functions. - Adds comprehensive support for styling, conditional formatting, data validation, comments, pictures, and charts. - Configures build setup, project metadata (NuGet), and developer guidelines. - Includes editor and Git attributes for consistent code style and line endings.
2026-06-23 11:02:53 -05:00
parent 28bc05cf54
commit 2cd6df6481
1092 changed files with 97270 additions and 408 deletions
@@ -0,0 +1,94 @@
+using ClosedXML.Excel;
+using NUnit.Framework;
+using System;
+using System.Data;
+using System.IO;
+using System.Linq;
+
+namespace ClosedXML_Tests.Excel
+{
+    public class NumberFormatTests
+    {
+        [Test]
+        public void PreserveCellFormat()
+        {
+            using (var wb = new XLWorkbook())
+            {
+                var ws = wb.AddWorksheet("Sheet1");
+
+                var table = new DataTable();
+                table.Columns.Add("Date", typeof(DateTime));
+
+                for (int i = 0; i < 10; i++)
+                {
+                    table.Rows.Add(new DateTime(2017, 1, 1).AddMonths(i));
+                }
+
+                ws.Column(1).Style.NumberFormat.Format = "yy-MM-dd";
+                ws.Cell("A1").InsertData(table);
+                Assert.AreEqual("yy-MM-dd", ws.Cell("A5").Style.DateFormat.Format);
+
+                ws.Row(1).Style.NumberFormat.Format = "yy-MM-dd";
+                ws.Cell("A1").InsertData(table.Rows, true);
+                Assert.AreEqual("yy-MM-dd", ws.Cell("E1").Style.DateFormat.Format);
+            }
+        }
+
+        [Test]
+        public void TestExcelNumberFormats()
+        {
+            using (var wb = new XLWorkbook())
+            {
+                var ws = wb.AddWorksheet("Sheet1");
+                var c = ws.FirstCell()
+                    .SetValue(41573.875)
+                    .SetDataType(XLDataType.DateTime);
+
+                c.Style.NumberFormat.SetFormat("m/d/yy\\ h:mm;@");
+
+                Assert.AreEqual("10/26/13 21:00", c.GetFormattedString());
+            }
+        }
+
+        [Test]
+        public void ReadAndWriteColumnNumberFormat()
+        {
+            using (var memoryStream = new MemoryStream())
+            {
+                using (var wb = new XLWorkbook())
+                {
+                    var ws = wb.AddWorksheet();
+                    var sourceColumn = ws.Column(1);
+                    sourceColumn.Style.NumberFormat.Format = "0.000";
+                    wb.SaveAs(memoryStream);
+                }
+
+                memoryStream.Position = 0;
+
+                using (var wb = new XLWorkbook(memoryStream))
+                {
+                    var column = wb.Worksheets.Single().Column(1);
+                    Assert.AreEqual("0.000", column.Style.NumberFormat.Format);
+                }
+            }
+        }
+
+        [Test]
+        public void XLNumberFormatKey_GetHashCode_IsCaseSensitive()
+        {
+            var numberFormatKey1 = new XLNumberFormatKey { Format = "MM" };
+            var numberFormatKey2 = new XLNumberFormatKey { Format = "mm" };
+
+            Assert.AreNotEqual(numberFormatKey1.GetHashCode(), numberFormatKey2.GetHashCode());
+        }
+
+        [Test]
+        public void XLNumberFormatKey_Equals_IsCaseSensitive()
+        {
+            var numberFormatKey1 = new XLNumberFormatKey { Format = "MM" };
+            var numberFormatKey2 = new XLNumberFormatKey { Format = "mm" };
+
+            Assert.IsFalse(numberFormatKey1.Equals(numberFormatKey2));
+        }
+    }
+}