ByteScout Barcode Suite – C# – Use custom functions with spreadsheet sdk

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ByteScout Barcode Suite – C# – Use custom functions with spreadsheet sdk

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How to use custom functions with spreadsheet sdk in C# using ByteScout Barcode Suite

Learning is essential in computer world and the tutorial below will demonstrate how to use custom functions with spreadsheet sdk in C#

These source code samples are assembled by their programming language and functions they apply. Want to use custom functions with spreadsheet sdk in your C# app? ByteScout Barcode Suite is designed for it. ByteScout Barcode Suite is the bundle that privides 3 SDK products to generate barcodes (Barcode SDK), read barcodes (Barcode Reaer SDK) and read and write spreadsheets (Spreadsheet SDK).

This prolific sample source code in C# for ByteScout Barcode Suite contains various functions and other necessary options you should do calling the API to use custom functions with spreadsheet sdk. Simply copy and paste in your C# project or application you and then run your app! Enjoy writing a code with ready-to-use sample codes in C#.

If you want to try other source code samples then the free trial version of ByteScout Barcode Suite is available for download from our website. Just try other source code samples for C#.

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Program.cs

      using System;
using System.Diagnostics;

using Bytescout.Spreadsheet;

namespace CustomFunctions
{
    /// <summary>
    /// This example demonstrates the calculation of custom functions.
    /// </summary>
    class Program
    {
        static void Main(string[] args)
        {
            // Create Spreadsheet instance
            Spreadsheet spreadsheet = new Spreadsheet();
            spreadsheet.RegistrationName = "demo";
            spreadsheet.RegistrationKey = "demo";

            // Load document
            spreadsheet.LoadFromFile(@"CustomFuncExample.xlsx");

            // Add custom formula handler
            spreadsheet.CustomFunctionsCallback = new CustomFunctionsCallback(MyFunctions);
            
            // Calculate the first worksheet
            Worksheet worksheet = spreadsheet.Workbook.Worksheets[0];
            worksheet.Calculate();

            // Save calculated values to neighbor cells to demonstrate custom functions are calculated
            worksheet["C2"].Value = worksheet["B2"].Value;
            worksheet["C3"].Value = worksheet["B3"].Value;
            worksheet["C4"].Value = worksheet["B4"].Value;

            // Save modified spreadsheet
            spreadsheet.SaveAs(@"result.xlsx");

            // Cleanup
            spreadsheet.Dispose();

            // Open saved spreadsheet in associated application (for demo purpose)
            Process.Start("result.xlsx");
        }

        public static object MyFunctions(string funcName, object[] args, ref bool handled)
        {
            // Handle "CUSTOMFUNC_FACTORIAL" function
            if (String.Compare(funcName, "CUSTOMFUNC_FACTORIAL", StringComparison.OrdinalIgnoreCase) == 0)
            {
                handled = true;

                // Compute factorial
                if (args.Length > 0)
                {
                    int value = (int)(double) args[0];

                    if (value == 0 || value == 1)
                        return 1;

                    int f = 1;
                    for (int i = 1; i <= value; i++)
                        f = f * i;

                    return f;
                }

                return null;
            }

            // Handle "CUSTOMFUNC_SUM" function
            if (string.Compare(funcName, "CUSTOMFUNC_SUM", StringComparison.OrdinalIgnoreCase) == 0)
            {
                handled = true;

                // Compute the sum of values
                if (args.Length > 0)
                {
                    double sum = 0;
                    foreach (var o in args)
                        sum += (double)o;

                    return sum;
                }

                return null;
            }

            return null;
        }
    }
}