969014 - How to Work with Formulas in an Excel Document Using the .NET Excel Library

Videos/Excel_Formulas/Controllers/HomeController.cs

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+using System.Diagnostics;
+using Excel_Formulas.Models;
+using Microsoft.AspNetCore.Mvc;
+using Syncfusion.XlsIO;
+
+namespace Excel_Formulas.Controllers
+{
+    public class HomeController : Controller
+    {
+        private readonly ILogger<HomeController> _logger;
+
+        public HomeController(ILogger<HomeController> logger)
+        {
+            _logger = logger;
+        }
+
+        public IActionResult AddFormula()
+        {
+            ExcelEngine excelEngine = new ExcelEngine();
+            IApplication application = excelEngine.Excel;
+            application.DefaultVersion = ExcelVersion.Xlsx;
+            IWorkbook workbook = application.Workbooks.Create(1);
+            IWorksheet worksheet = workbook.Worksheets[0];
+
+            worksheet.Range["A1"].Number = 10;
+            worksheet.Range["B1"].Number = 20;
+
+            worksheet.Range["C1"].Formula = "=SUM(A1,B1)";
+
+            return ExportWorkbook(workbook, "Formula.xlsx");
+        }
+
+        public IActionResult CrossSheetReference()
+        {
+            ExcelEngine excelEngine = new ExcelEngine();
+            IApplication application = excelEngine.Excel;
+            application.DefaultVersion = ExcelVersion.Xlsx;
+            IWorkbook workbook = application.Workbooks.Create(2);
+            IWorksheet worksheet1 = workbook.Worksheets[0];
+            IWorksheet worksheet2 = workbook.Worksheets[1];
+
+            worksheet1.Range["A1"].Number = 10;
+            worksheet2.Range["B1"].Number = 20;
+
+            worksheet1.Range["C1"].Formula = "=SUM(Sheet2!B1,Sheet1!A1)";
+
+            return ExportWorkbook(workbook, "CrossSheetReference.xlsx");
+        }
+
+        public IActionResult NamedRanges()
+        {
+            ExcelEngine excelEngine = new ExcelEngine();
+            IApplication application = excelEngine.Excel;
+            application.DefaultVersion = ExcelVersion.Xlsx;
+            IWorkbook workbook = application.Workbooks.Create(1);
+            IWorksheet worksheet = workbook.Worksheets[0];
+
+            worksheet.Range["A1"].Number = 10;
+            worksheet.Range["B1"].Number = 20;
+
+            IName name1 = workbook.Names.Add("One");
+            name1.RefersToRange = worksheet.Range["A1"];
+
+            IName name2 = workbook.Names.Add("Two");
+            name2.RefersToRange = worksheet.Range["B1"];
+
+            worksheet.Range["C1"].Formula = "=SUM(One,Two)";
+
+            return ExportWorkbook(workbook, "NamedRanges.xlsx");
+        }
+
+        public IActionResult ArrayFormula()
+        {
+            ExcelEngine excelEngine = new ExcelEngine();
+            IApplication application = excelEngine.Excel;
+            application.DefaultVersion = ExcelVersion.Xlsx;
+            IWorkbook workbook = application.Workbooks.Create(1);
+            IWorksheet worksheet = workbook.Worksheets[0];
+
+            worksheet.Range["A1:D1"].FormulaArray = "{1,2,3,4}";
+
+            worksheet.Names.Add("ArrayRange", worksheet.Range["A1:D1"]);
+
+            worksheet.Range["A2:D2"].FormulaArray = "ArrayRange+100";
+
+            return ExportWorkbook(workbook, "ArrayFormula.xlsx");
+        }
+
+        public IActionResult TableFormula()
+        {
+            ExcelEngine excelEngine = new ExcelEngine();
+            IApplication application = excelEngine.Excel;
+            application.DefaultVersion = ExcelVersion.Xlsx;
+            IWorkbook workbook = application.Workbooks.Create(1);
+            IWorksheet worksheet = workbook.Worksheets[0];
+
+            IListObject table = worksheet.ListObjects.Create("Table1", worksheet["A1:D3"]);
+
+            worksheet[1, 1].Text = "Products";
+            worksheet[1, 2].Text = "Rate";
+            worksheet[1, 3].Text = "Quantity";
+            worksheet[1, 4].Text = "Total";
+
+            worksheet[2, 1].Text = "Item1";
+            worksheet[2, 2].Number = 200;
+            worksheet[2, 3].Number = 2;
+
+            worksheet[3, 1].Text = "Item2";
+            worksheet[3, 2].Number = 300;
+            worksheet[3, 3].Number = 3;
+
+            table.Columns[3].CalculatedFormula = "SUM(20,[Rate]*[Quantity])";
+
+            return ExportWorkbook(workbook, "CalculatedColumn.xlsx");
+        }
+
+        private FileStreamResult ExportWorkbook(IWorkbook workbook, string fileName)
+        {
+            MemoryStream stream = new MemoryStream();
+            workbook.SaveAs(stream);
+            stream.Position = 0;
+            return File(stream, "application/xlsx", fileName);
+        }
+
+        public IActionResult Index()
+        {
+            return View();
+        }
+
+        public IActionResult Privacy()
+        {
+            return View();
+        }
+
+        [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
+        public IActionResult Error()
+        {
+            return View(new ErrorViewModel { RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier });
+        }
+    }
+}

Videos/Excel_Formulas/Excel_Formulas.csproj

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+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Syncfusion.XlsIO.Net.Core" Version="31.1.17" />
+  </ItemGroup>
+
+</Project>

Videos/Excel_Formulas/Models/ErrorViewModel.cs

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+namespace Excel_Formulas.Models
+{
+    public class ErrorViewModel
+    {
+        public string? RequestId { get; set; }
+
+        public bool ShowRequestId => !string.IsNullOrEmpty(RequestId);
+    }
+}

Videos/Excel_Formulas/Program.cs

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+namespace Excel_Formulas
+{
+    public class Program
+    {
+        public static void Main(string[] args)
+        {
+            var builder = WebApplication.CreateBuilder(args);
+
+            // Add services to the container.
+            builder.Services.AddControllersWithViews();
+
+            var app = builder.Build();
+
+            // Configure the HTTP request pipeline.
+            if (!app.Environment.IsDevelopment())
+            {
+                app.UseExceptionHandler("/Home/Error");
+                // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
+                app.UseHsts();
+            }
+
+            app.UseHttpsRedirection();
+            app.UseStaticFiles();
+
+            app.UseRouting();
+
+            app.UseAuthorization();
+
+            app.MapControllerRoute(
+                name: "default",
+                pattern: "{controller=Home}/{action=Index}/{id?}");
+
+            app.Run();
+        }
+    }
+}

Videos/Excel_Formulas/Properties/launchSettings.json

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+{
+  "$schema": "http://json.schemastore.org/launchsettings.json",
+  "iisSettings": {
+    "windowsAuthentication": false,
+    "anonymousAuthentication": true,
+    "iisExpress": {
+      "applicationUrl": "http://localhost:46852",
+      "sslPort": 44381
+    }
+  },
+  "profiles": {
+    "http": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "applicationUrl": "http://localhost:5287",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "https": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "applicationUrl": "https://localhost:7138;http://localhost:5287",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "IIS Express": {
+      "commandName": "IISExpress",
+      "launchBrowser": true,
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    }
+  }
+}

Videos/Excel_Formulas/Views/Home/Index.cshtml

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+@{
+    ViewData["Title"] = "Home Page";
+}
+
+<div>
+    <h2 style="margin-bottom: 20px"> Working with Formulas in Excel</h2>
+    <div>
+        <button style="width: 250px; margin-bottom: 20px; height: 40px;display:block;font-size:18px;"
+                onclick="location.href='@Url.Action("AddFormula", "Home")'">
+            Add Formula
+        </button>
+        <button style="width: 250px; margin-bottom: 20px; height: 40px;display:block;font-size:18px;"
+                onclick="location.href='@Url.Action("CrossSheetReference", "Home")'">
+            Cross-Sheet Reference
+        </button>
+        <button style="width: 250px; margin-bottom: 20px; height: 40px;display:block;font-size:18px;"
+                onclick="location.href='@Url.Action("NamedRanges", "Home")'">
+            Named Ranges
+        </button>
+        <button style="width: 250px; margin-bottom: 20px; height: 40px;display:block;font-size:18px;"
+                onclick="location.href='@Url.Action("ArrayFormula", "Home")'">
+            Array Formula
+        </button>
+        <button style="width: 250px; margin-bottom: 20px; height: 40px;display:block;font-size:18px;"
+                onclick="location.href='@Url.Action("TableFormula", "Home")'">
+            Table Formula
+        </button>
+    </div>
+</div>

Videos/Excel_Formulas/Views/Home/Privacy.cshtml

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+@{
+    ViewData["Title"] = "Privacy Policy";
+}
+<h1>@ViewData["Title"]</h1>
+
+<p>Use this page to detail your site's privacy policy.</p>

Videos/Excel_Formulas/Views/Shared/Error.cshtml

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+@model ErrorViewModel
+@{
+    ViewData["Title"] = "Error";
+}
+
+<h1 class="text-danger">Error.</h1>
+<h2 class="text-danger">An error occurred while processing your request.</h2>
+
+@if (Model.ShowRequestId)
+{
+    <p>
+        <strong>Request ID:</strong> <code>@Model.RequestId</code>
+    </p>
+}
+
+<h3>Development Mode</h3>
+<p>
+    Swapping to <strong>Development</strong> environment will display more detailed information about the error that occurred.
+</p>
+<p>
+    <strong>The Development environment shouldn't be enabled for deployed applications.</strong>
+    It can result in displaying sensitive information from exceptions to end users.
+    For local debugging, enable the <strong>Development</strong> environment by setting the <strong>ASPNETCORE_ENVIRONMENT</strong> environment variable to <strong>Development</strong>
+    and restarting the app.
+</p>

Videos/Excel_Formulas/Views/Shared/_Layout.cshtml

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>@ViewData["Title"] - Excel_Formulas</title>
+    <link rel="stylesheet" href="~/lib/bootstrap/dist/css/bootstrap.min.css" />
+    <link rel="stylesheet" href="~/css/site.css" asp-append-version="true" />
+    <link rel="stylesheet" href="~/Excel_Formulas.styles.css" asp-append-version="true" />
+</head>
+<body>
+    <header>
+        <nav class="navbar navbar-expand-sm navbar-toggleable-sm navbar-light bg-white border-bottom box-shadow mb-3">
+            <div class="container-fluid">
+                <a class="navbar-brand" asp-area="" asp-controller="Home" asp-action="Index">Excel_Formulas</a>
+                <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target=".navbar-collapse" aria-controls="navbarSupportedContent"
+                        aria-expanded="false" aria-label="Toggle navigation">
+                    <span class="navbar-toggler-icon"></span>
+                </button>
+                <div class="navbar-collapse collapse d-sm-inline-flex justify-content-between">
+                    <ul class="navbar-nav flex-grow-1">
+                        <li class="nav-item">
+                            <a class="nav-link text-dark" asp-area="" asp-controller="Home" asp-action="Index">Home</a>
+                        </li>
+                        <li class="nav-item">
+                            <a class="nav-link text-dark" asp-area="" asp-controller="Home" asp-action="Privacy">Privacy</a>
+                        </li>
+                    </ul>
+                </div>
+            </div>
+        </nav>
+    </header>
+    <div class="container">
+        <main role="main" class="pb-3">
+            @RenderBody()
+        </main>
+    </div>
+
+    <footer class="border-top footer text-muted">
+        <div class="container">
+            &copy; 2025 - Excel_Formulas - <a asp-area="" asp-controller="Home" asp-action="Privacy">Privacy</a>
+        </div>
+    </footer>
+    <script src="~/lib/jquery/dist/jquery.min.js"></script>
+    <script src="~/lib/bootstrap/dist/js/bootstrap.bundle.min.js"></script>
+    <script src="~/js/site.js" asp-append-version="true"></script>
+    @await RenderSectionAsync("Scripts", required: false)
+</body>
+</html>