In Epplus, when we create a DropDown list for some cells in excel file, then user put a value which is not part of the list, the cell show a message says: value must match one of the listed items.
Instead of this message, Is it possible to prevent the user to put a value which is not part of the drop down list?
Thanks in advance,
I did it with the following code:
//ExcelWorksheet ws var validation = ws.DataValidations.AddListValidation(cell.Address); //Error handling validation.ShowErrorMessage = true; validation.ErrorStyle = ExcelDataValidationWarningStyle.stop; validation.ErrorTitle = "Error"; validation.Error = "Error Text"; // sheet with a name : DropDownLists // from DropDownLists sheet, get values from cells: !$A$1:$A$10 var formula = "=DropDownLists!$A$1:$A$10"; //Applying Formula to the range validation.Formula.ExcelFormula = formula;