Added validation for shared formulas

EPPlusSoftware · Feb 20, 2020 · f6b1b1f · f6b1b1f
1 parent 1fa7559
commit f6b1b1f
Showing 1 changed file with 6 additions and 3 deletions.
diff --git a/src/EPPlus/ExcelWorksheet.cs b/src/EPPlus/ExcelWorksheet.cs
@@ -2905,10 +2905,13 @@ private void UpdateRowCellData(StreamWriter sw, string prefix)
                     }
                     object v = val._value;
                     object formula = _formulas.GetValue(cse.Row, cse.Column);
-                    if (formula is int)
+                    if (formula is int sfId)
                     {
-                        var sfId = (int)formula;
-                        var f = _sharedFormulas[(int)sfId];
+                        if(!_sharedFormulas.ContainsKey(sfId))
+                        {
+                            throw (new InvalidDataException($"SharedFormulaId {sfId} not found on Worksheet {Name} cell {cse.CellAddress}"));
+                        }
+                        var f = _sharedFormulas[sfId];
                         if (f.Address.IndexOf(':') > 0)
                         {
                             if (f.StartCol == cse.Column && f.StartRow == cse.Row)