Excel API Library for .NET - Sample Browser | Document Solutions | Create custom validation

You can add a custom validation rule to validate data in a worksheet by applying custom validation. //create a new workbook var workbook = new GrapeCity.Documents.Excel.Workbook(); IWorksheet worksheet = workbook.Worksheets[0]; worksheet.Range["A2"].Value = 1; worksheet.Range["A3"].Value = 2; worksheet.Range["C2"].Value = 0; //create custom validation, if the expression "=$C2ドル" result is true, the cell's validation will be true, otherwise, it is false. //when use custom validation, validationOperator and formula2 parameters will be ignored even if you have given. worksheet.Range["A2:A3"].Validation.Add(ValidationType.Custom, ValidationAlertStyle.Information, formula1:"=$C2ドル"); //judge if Range["A2:A3"] has validation. for (int i = 1; i <= 2; i++) { if (worksheet.Range[i, 0].HasValidation) { //set the range[i, 0]'s interior color. worksheet.Range[i, 0].Interior.Color = Color.LightBlue; } } // Save to an excel file workbook.Save("CreateCustomValidation.xlsx"); ' Create a new Workbook Dim workbook As New Workbook Dim worksheet As IWorksheet = workbook.Worksheets(0) worksheet.Range!A2.Value = 1 worksheet.Range!A3.Value = 2 worksheet.Range!C2.Value = 0 'create custom validation, if the expression "=$C2ドル" result is True, the cell's validation will be True, otherwise, it is False. 'when use custom validation, validationOperator and formula2 parameters will be ignored even if you have given. worksheet.Range("A2:A3").Validation.Add(ValidationType.Custom, ValidationAlertStyle.Information, formula1:="=$C2ドル") 'judge if Range("A2:A3") has validation. For i As Integer = 1 To 2 If worksheet.Range(i, 0).HasValidation Then 'set the range(i, 0)'s interior color. worksheet.Range(i, 0).Interior.Color = Color.LightBlue End If Next i ' save to an excel file workbook.Save("CreateCustomValidation.xlsx")