Excel Data Validation

Following example demonstrates how to set Data Validation for certain cells.

GemBox.Spreadsheet supports reading and writing all types of Data Validations for XLSX file format.

Screenshot of Excel data validation set with GemBox.Spreadsheet
Excel data validation set with GemBox.Spreadsheet
using System;
using GemBox.Spreadsheet;

class Program
{
    static void Main()
    {
        // If using Professional version, put your serial key below.
        SpreadsheetInfo.SetLicense("FREE-LIMITED-KEY");

        var workbook = new ExcelFile();
        var worksheet = workbook.Worksheets.Add("Data Validation");

        worksheet.Cells[0, 0].Value = "Data validation examples:";

        worksheet.Cells[2, 1].Value = "Decimal greater than 3.14 (on entire row 4):";
        worksheet.DataValidations.Add(new DataValidation(worksheet.Rows[3].Cells)
        {
            Type = DataValidationType.Decimal,
            Operator = DataValidationOperator.GreaterThan,
            Formula1 = 3.14,
            InputMessageTitle = "Enter a decimal",
            InputMessage = "Decimal should be greater than 3.14.",
            ErrorTitle = "Invalid decimal",
            ErrorMessage = "Value should be a decimal greater than 3.14."
        });
        worksheet.Cells.GetSubrange("A4", "J4").Value = 3.15;

        worksheet.Cells[7, 1].Value = "List from B9 to B12 (on cell C8):";
        worksheet.Cells[8, 1].Value = "John";
        worksheet.Cells[9, 1].Value = "Fred";
        worksheet.Cells[10, 1].Value = "Hans";
        worksheet.Cells[11, 1].Value = "Ivan";
        worksheet.DataValidations.Add(new DataValidation(worksheet, "C8")
        {
            Type = DataValidationType.List,
            Formula1 = "=B9:B12",
            InputMessageTitle = "Enter a name",
            InputMessage = "Name should be from the list: John, Fred, Hans, Ivan.",
            ErrorStyle = DataValidationErrorStyle.Warning,
            ErrorTitle = "Invalid name",
            ErrorMessage = "Value should be a name from the list: John, Fred, Hans, Ivan."
        });
        worksheet.Cells["C8"].Value = "John";

        worksheet.Cells[13, 1].Value = "Date between 2011-01-01 and 2011-12-31 (on cell range C14:E15):";
        worksheet.DataValidations.Add(new DataValidation(worksheet.Cells.GetSubrange("C14", "E15"))
        {
            Type = DataValidationType.Date,
            Operator = DataValidationOperator.Between,
            Formula1 = new DateTime(2011, 1, 1),
            Formula2 = new DateTime(2011, 12, 31),
            InputMessageTitle = "Enter a date",
            InputMessage = "Date should be between 2011-01-01 and 2011-12-31.",
            ErrorStyle = DataValidationErrorStyle.Information,
            ErrorTitle = "Invalid date",
            ErrorMessage = "Value should be a date between 2011-01-01 and 2011-12-31."
        });
        worksheet.Cells.GetSubrange("C14", "E15").Value = new DateTime(2011, 1, 1);

        // Column width of 8, 55 and 15 characters.
        worksheet.Columns[0].Width = 8 * 256;
        worksheet.Columns[1].Width = 55 * 256;
        worksheet.Columns[2].Width = 15 * 256;
        worksheet.Columns[3].Width = 15 * 256;
        worksheet.Columns[4].Width = 15 * 256;

        workbook.Save("Data Validation.xlsx");
    }
}
Imports System
Imports GemBox.Spreadsheet

Module Program

    Sub Main()

        ' If using Professional version, put your serial key below.
        SpreadsheetInfo.SetLicense("FREE-LIMITED-KEY")

        Dim workbook = New ExcelFile
        Dim worksheet = workbook.Worksheets.Add("Data Validation")

        worksheet.Cells(0, 0).Value = "Data validation examples:"

        worksheet.Cells(2, 1).Value = "Decimal greater than 3.14 (on entire row 4):"
        worksheet.DataValidations.Add(New DataValidation(worksheet.Rows(3).Cells) With {
             .Type = DataValidationType.Decimal,
             .Operator = DataValidationOperator.GreaterThan,
             .Formula1 = 3.14, .InputMessageTitle = "Enter a decimal",
             .InputMessage = "Decimal should be greater than 3.14.",
             .ErrorTitle = "Invalid decimal",
             .ErrorMessage = "Value should be a decimal greater than 3.14."
        })
        worksheet.Cells.GetSubrange("A4", "J4").Value = 3.15

        worksheet.Cells(7, 1).Value = "List from B9 to B12 (on cell C8):"
        worksheet.Cells(8, 1).Value = "John"
        worksheet.Cells(9, 1).Value = "Fred"
        worksheet.Cells(10, 1).Value = "Hans"
        worksheet.Cells(11, 1).Value = "Ivan"
        worksheet.DataValidations.Add(New DataValidation(worksheet, "C8") With {
            .Type = DataValidationType.List,
            .Formula1 = "=B9:B12",
            .InputMessageTitle = "Enter a name",
            .InputMessage = "Name should be from the list: John, Fred, Hans, Ivan.",
            .ErrorStyle = DataValidationErrorStyle.Warning,
            .ErrorTitle = "Invalid name",
            .ErrorMessage = "Value should be a name from the list: John, Fred, Hans, Ivan."
        })
        worksheet.Cells("C8").Value = "John"

        worksheet.Cells(13, 1).Value = "Date between 2011-01-01 and 2011-12-31 (on cell range C14:E15):"
        worksheet.DataValidations.Add(New DataValidation(worksheet.Cells.GetSubrange("C14", "E15")) With {
            .Type = DataValidationType.Date,
            .Operator = DataValidationOperator.Between,
            .Formula1 = New DateTime(2011, 1, 1),
            .Formula2 = New DateTime(2011, 12, 31),
            .InputMessageTitle = "Enter a date",
            .InputMessage = "Date should be between 2011-01-01 and 2011-12-31.",
            .ErrorStyle = DataValidationErrorStyle.Information,
            .ErrorTitle = "Invalid date",
            .ErrorMessage = "Value should be a date between 2011-01-01 and 2011-12-31."
        })
        worksheet.Cells.GetSubrange("C14", "E15").Value = New DateTime(2011, 1, 1)

        ' Column width of 8, 55 and 15 characters.
        worksheet.Columns(0).Width = 8 * 256
        worksheet.Columns(1).Width = 55 * 256
        worksheet.Columns(2).Width = 15 * 256
        worksheet.Columns(3).Width = 15 * 256
        worksheet.Columns(4).Width = 15 * 256

        workbook.Save("Data Validation.xlsx")
    End Sub
End Module

Check next example or download examples from GitHub.