Merge pull request #39 from WebApiContrib/issue-38

Fixes #38—`headerHeight` constructor parameter now nullable and defaults to `null`.

Author: jordangray

src/WebApiContrib.Formatting.Xlsx/XlsxMediaTypeFormatter.cs

@@ -66,7 +66,7 @@ public class XlsxMediaTypeFormatter : MediaTypeFormatter
         /// <param name="cellHeight">Height of each row of data.</param>
         /// <param name="cellStyle">An action method that modifies the worksheet cell style.</param>
         /// <param name="headerStyle">An action method that modifies the cell style of the first (header) row in the worksheet.</param>
-        public XlsxMediaTypeFormatter(bool autoFit = true, bool autoFilter = false, bool freezeHeader = false, double headerHeight = 0, Action<ExcelStyle> cellStyle = null, Action<ExcelStyle> headerStyle = null)
+        public XlsxMediaTypeFormatter(bool autoFit = true, bool autoFilter = false, bool freezeHeader = false, double? headerHeight = null, Action<ExcelStyle> cellStyle = null, Action<ExcelStyle> headerStyle = null)
         {
             SupportedMediaTypes.Clear();
             SupportedMediaTypes.Add(new MediaTypeHeaderValue("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"));

test/WebApiContrib.Formatting.Xlsx.Tests/XlsxMediaTypeFormatterTests.cs

@@ -397,6 +397,20 @@ public void WriteToStreamAsync_WithArrayOfDateTime_WritesExcelDocumentToStream()
             Assert.AreEqual(data[1], sheet.GetValue<DateTime>(2, 1), "Value in A2 is incorrect.");
         }
 
+        [TestMethod]
+        public void XlsxMediaTypeFormatter_WithDefaultHeaderHeight_DefaultsToSameHeightForAllCells()
+        {
+            var data = new[] { new SimpleTestItem { Value1 = "A1", Value2 = "B1" },
+                               new SimpleTestItem { Value1 = "A1", Value2 = "B2" }  };
+
+            var formatter = new XlsxMediaTypeFormatter();
+
+            var sheet = GetWorksheetFromStream(formatter, data);
+
+            Assert.AreNotEqual(sheet.Row(1).Height, 0d, "HeaderHeight should not be zero");
+            Assert.AreEqual(sheet.Row(1).Height, sheet.Row(2).Height, "HeaderHeight should be the same as other rows");
+        }
+
         [TestMethod]
         public void WriteToStreamAsync_WithCellAndHeaderFormats_WritesFormattedExcelDocumentToStream()
         {