Fixes issue i1225 (#1226)

EPPlusSoftware · Dec 22, 2023 · f94ec88 · f94ec88
1 parent 601c74c
commit f94ec88
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Showing 3 changed files with 16 additions and 3 deletions.
diff --git a/src/EPPlus/FormulaParsing/FormulaExpressions/RangeExpression.cs b/src/EPPlus/FormulaParsing/FormulaExpressions/RangeExpression.cs
@@ -77,7 +77,7 @@ private CompileResult GetNegatedValue(object value, FormulaRangeAddress addressI
             }
             else
             {
-                var d = ConvertUtil.GetValueDouble(value, false, true);
+                var d = ConvertUtil.GetValueDouble(value??0D, false, true);
                 if (double.IsNaN(d))
                 {
                     return CompileResultFactory.Create(ExcelErrorValue.Create(eErrorType.Value), addressInfo);

diff --git a/src/EPPlusTest/FormulaParsing/NegatorTests.cs b/src/EPPlusTest/FormulaParsing/NegatorTests.cs
@@ -198,5 +198,19 @@ public void DoubleNegationsWithCells()
                 Assert.AreEqual(-9.75, ws.Cells["G1"].Value);
             }
         }
-    }
+		[TestMethod]
+		public void NegateAnEmptyCellShouldReturnZero()
+		{
+			using (var p = new ExcelPackage())
+			{
+				var ws = p.Workbook.Worksheets.Add("Sheet1");
+
+				ws.Cells["A1"].Formula = "-B1";
+				ws.Calculate();
+
+				Assert.AreEqual(0d, ws.Cells["A1"].Value);
+			}
+		}
+
+	}
 }
diff --git a/src/EPPlusTest/Issues.cs b/src/EPPlusTest/Issues.cs
@@ -6069,6 +6069,5 @@ public void VBA_ModuleName()
             }
         }
 
-
 	}
 }