file-formats-aspnet-ej1-demos/XlsIO/Formulas.aspx.cs

#region Copyright Syncfusion Inc. 2001 - 2022
// Copyright Syncfusion Inc. 2001 - 2022. All rights reserved.
// Use of this code is subject to the terms of our license.
// A copy of the current license can be obtained at any time by e-mailing
// licensing@syncfusion.com. Any infringement will be prosecuted under
// applicable laws. 
#endregion
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using Syncfusion.XlsIO;

namespace WebSampleBrowser.XlsIO
{
    public partial class Formulas : System.Web.UI.Page
    {
        # region Page Load
        /// <summary>
        /// Handles the page load
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void Page_Load(object sender, EventArgs e)
        {
        }
        # endregion

        # region Events
        /// <summary>
        /// Creates spreadsheet
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void Button1_Click(object sender, EventArgs e)
        {
            //New instance of XlsIO is created.[Equivalent to launching Microsoft Excel with no workbooks open].
            //The instantiation process consists of two steps.

            //Step 1 : Instantiate the spreadsheet creation engine.
            ExcelEngine excelEngine = new ExcelEngine();
            //Step 2 : Instantiate the excel application object.
            IApplication application = excelEngine.Excel;

            //A new workbook is created.[Equivalent to creating a new workbook in Microsoft Excel]
            //The new workbook will have 3 worksheets
            IWorkbook workbook = application.Workbooks.Create(3);
            //The first worksheet object in the worksheets collection is accessed.
            IWorksheet sheet = workbook.Worksheets[0];

            #region Insert Array Formula

            sheet.Range["A2"].Text = "Array formulas";
            sheet.Range["B2:E2"].FormulaArray = "{10,20,30,40}";
            sheet.Names.Add("ArrayRange", sheet.Range["B2:E2"]);
            sheet.Range["B3:E3"].FormulaArray = "ArrayRange+100";
            sheet.Range["A2"].CellStyle.Font.Bold = true;
            sheet.Range["A2"].CellStyle.Font.Size = 14;

            #endregion

            #region Excel functions

            sheet.Range["A5"].Text = "Formula";
            sheet.Range["B5"].Text = "Result";

            sheet.Range["A7"].Text = "ABS(ABS(-B3))";
            sheet.Range["B7"].Formula = "ABS(ABS(-B3))";

            sheet.Range["A9"].Text = "SUM(B3,C3)";
            sheet.Range["B9"].Formula = "SUM(B3,C3)";

            sheet.Range["A11"].Text = "MIN({10,20,30;5,15,35;6,16,36})";
            sheet.Range["B11"].Formula = "MIN({10,20,30;5,15,35;6,16,36})";

            sheet.Range["A13"].Text = "LOOKUP(B3,B3:E8)";
            sheet.Range["B13"].Formula = "LOOKUP(B3,B3:E3)";

            sheet.Range["A5:B5"].CellStyle.Font.Bold = true;
            sheet.Range["A5:B5"].CellStyle.Font.Size = 14;

            #endregion

            #region Simple formulas
            sheet.Range["C7"].Number = 10;
            sheet.Range["C9"].Number = 10;
            sheet.Range["A15"].Text = "C7+C9";
            sheet.Range["B15"].Formula = "C7+C9";

            #endregion

            sheet.Range["B1"].Text = "Excel formula support";
            sheet.Range["B1"].CellStyle.Font.Bold = true;
            sheet.Range["B1"].CellStyle.Font.Size = 14;
            sheet.Range["B1:E1"].Merge();
            sheet.Range["A1:A15"].AutofitColumns();

            //Saving the workbook to disk.
            workbook.SaveAs("Sample.xls", ExcelSaveType.SaveAsXLS, Response, ExcelDownloadType.PromptDialog);

            //Close the workbook.
            workbook.Close();
            excelEngine.Dispose();
        }

        /// <summary>
        /// Reads formula from the spreadsheet
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void Button3_Click(object sender, EventArgs e)
        {
            //New instance of XlsIO is created.[Equivalent to launching Microsoft Excel with no workbooks open].
            //The instantiation process consists of two steps.

            //Step 1 : Instantiate the spreadsheet creation engine.
            ExcelEngine excelEngine = new ExcelEngine();
            //Step 2 : Instantiate the excel application object.
            IApplication application = excelEngine.Excel;

            IWorkbook workbook = application.Workbooks.Open(XlsIOHelper.ResolveApplicationDataPath("FormulaTemplate.xls", Request));

            //The first worksheet object in the worksheets collection is accessed.
            IWorksheet sheet = workbook.Worksheets[0];

            //Read computed Formula Value. 
            this.txtFormulaNumber.Text = sheet.Range["C1"].FormulaNumberValue.ToString();

            //Read Formula
            this.txtFormula.Text = sheet.Range["C1"].Formula;

            //Close the workbook.
            workbook.Close();

            //No exception will be thrown if there are unsaved workbooks.
            excelEngine.ThrowNotSavedOnDestroy = false;
            excelEngine.Dispose();
        }
        # endregion
    }
}