1008381 - How to Export Excel Chart to an Image Using the .NET Excel Library

Videos/Chart_to_Image/Chart_to_Image.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="*" />
+    <PackageReference Include="Syncfusion.XlsIORenderer.Net.Core" Version="*" />
+  </ItemGroup>
+
+</Project>

Videos/Chart_to_Image/Controllers/HomeController.cs

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+using Chart_to_Image.Models;
+using Microsoft.AspNetCore.Mvc;
+using Syncfusion.XlsIO;
+using Syncfusion.XlsIORenderer;
+using System.Diagnostics;
+
+namespace Chart_to_Image.Controllers
+{
+    public class HomeController : Controller
+    {
+        private readonly ILogger<HomeController> _logger;
+
+        public HomeController(ILogger<HomeController> logger)
+        {
+            _logger = logger;
+        }
+
+        public IActionResult ChartToPNG()
+        {
+            // Creates Excel engine instance
+            ExcelEngine excelEngine = new ExcelEngine();
+
+            // Access Excel application object
+            IApplication application = excelEngine.Excel;
+
+            // Sets default Excel version
+            application.DefaultVersion = ExcelVersion.Xlsx;
+
+            // Initializes renderer
+            application.XlsIORenderer = new XlsIORenderer();
+
+            // Sets output image format as PNG
+            application.XlsIORenderer.ChartRenderingOptions.ImageFormat = ExportImageFormat.Png;
+
+            // Sets output scaling mode as Best
+            application.XlsIORenderer.ChartRenderingOptions.ScalingMode = ScalingMode.Best; 
+
+            // Opens the Excel template file
+            FileStream inputStream = new FileStream("Data\\InputTemplate.xlsx", FileMode.Open, FileAccess.Read);
+
+            // Loads workbook
+            IWorkbook workbook = application.Workbooks.Open(inputStream);
+
+            // Access worksheet sheet
+            IWorksheet worksheet = workbook.Worksheets[0];
+
+            // Reads the chart
+            IChart chart = worksheet.Charts[0];
+
+            //Returns the chart as PNG
+            return ExportImage(chart, "Image.png", "image/png");
+        }
+
+        public IActionResult ChartToJPEG()
+        {
+            // Creates Excel engine instance
+            ExcelEngine excelEngine = new ExcelEngine();
+
+            // Access Excel application object
+            IApplication application = excelEngine.Excel;
+
+            // Sets default Excel version
+            application.DefaultVersion = ExcelVersion.Xlsx;
+
+            // Initializes renderer
+            application.XlsIORenderer = new XlsIORenderer();
+
+            // Sets output image format as JPEG
+            application.XlsIORenderer.ChartRenderingOptions.ImageFormat = ExportImageFormat.Jpeg;
+
+            // Sets output scaling mode as Best
+            application.XlsIORenderer.ChartRenderingOptions.ScalingMode = ScalingMode.Best;
+
+            // Opens the Excel template file
+            FileStream inputStream = new FileStream("Data\\InputTemplate.xlsx", FileMode.Open, FileAccess.Read);
+
+            // Loads workbook
+            IWorkbook workbook = application.Workbooks.Open(inputStream);
+
+            // Access worksheet sheet
+            IWorksheet worksheet = workbook.Worksheets[0];
+
+            // Reads the chart
+            IChart chart = worksheet.Charts[0];
+
+            //Returns the chart as JPEG
+            return ExportImage(chart, "Image.jpeg", "image/jpeg");
+        }
+
+        private FileStreamResult ExportImage(IChart chart, string fileName, string contentType)
+        {
+            // Creates memory stream for output
+            MemoryStream stream = new MemoryStream();
+
+            // Saves chart into the stream
+            chart.SaveAsImage(stream);
+
+            // Resets stream position
+            stream.Position = 0;
+
+            // Return the image as a downloadable file
+            return File(stream, contentType, 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/Chart_to_Image/Models/ErrorViewModel.cs

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

Videos/Chart_to_Image/Program.cs

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+namespace Chart_to_Image
+{
+    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/Chart_to_Image/Properties/launchSettings.json

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+{
+  "$schema": "http://json.schemastore.org/launchsettings.json",
+  "iisSettings": {
+    "windowsAuthentication": false,
+    "anonymousAuthentication": true,
+    "iisExpress": {
+      "applicationUrl": "http://localhost:52313",
+      "sslPort": 44362
+    }
+  },
+  "profiles": {
+    "http": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "applicationUrl": "http://localhost:5132",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "https": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "applicationUrl": "https://localhost:7131;http://localhost:5132",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "IIS Express": {
+      "commandName": "IISExpress",
+      "launchBrowser": true,
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    }
+  }
+}

Videos/Chart_to_Image/Views/Home/Index.cshtml

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+@{
+    ViewData["Title"] = "Home Page";
+}
+
+<div>
+    <h2 style="margin-bottom: 20px"> Export Excel Chart to Image </h2>
+    <div>
+        <button style="width: 200px; margin-bottom: 20px; height: 40px;display:block;font-size:18px;"
+                onclick="location.href='@Url.Action("ChartToPNG", "Home")'">
+            Chart to PNG
+        </button>
+        <button style="width: 200px; margin-bottom: 20px; height: 40px;display:block;font-size:18px;"
+                onclick="location.href='@Url.Action("ChartToJPEG", "Home")'">
+            Chart to JPEG
+        </button>
+    </div>
+</div>

Videos/Chart_to_Image/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/Chart_to_Image/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/Chart_to_Image/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"] - Chart_to_Image</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="~/Chart_to_Image.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">Chart_to_Image</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; 2026 - Chart_to_Image - <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>

Videos/Chart_to_Image/Views/Shared/_Layout.cshtml.css

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+/* Please see documentation at https://learn.microsoft.com/aspnet/core/client-side/bundling-and-minification
+for details on configuring this project to bundle and minify static web assets. */
+
+a.navbar-brand {
+  white-space: normal;
+  text-align: center;
+  word-break: break-all;
+}
+
+a {
+  color: #0077cc;
+}
+
+.btn-primary {
+  color: #fff;
+  background-color: #1b6ec2;
+  border-color: #1861ac;
+}
+
+.nav-pills .nav-link.active, .nav-pills .show > .nav-link {
+  color: #fff;
+  background-color: #1b6ec2;
+  border-color: #1861ac;
+}
+
+.border-top {
+  border-top: 1px solid #e5e5e5;
+}
+.border-bottom {
+  border-bottom: 1px solid #e5e5e5;
+}
+
+.box-shadow {
+  box-shadow: 0 .25rem .75rem rgba(0, 0, 0, .05);
+}
+
+button.accept-policy {
+  font-size: 1rem;
+  line-height: inherit;
+}
+
+.footer {
+  position: absolute;
+  bottom: 0;
+  width: 100%;
+  white-space: nowrap;
+  line-height: 60px;
+}

Videos/Chart_to_Image/Views/Shared/_ValidationScriptsPartial.cshtml

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+<script src="~/lib/jquery-validation/dist/jquery.validate.min.js"></script>
+<script src="~/lib/jquery-validation-unobtrusive/jquery.validate.unobtrusive.min.js"></script>

Videos/Chart_to_Image/Views/_ViewImports.cshtml

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+@using Chart_to_Image
+@using Chart_to_Image.Models
+@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers

Videos/Chart_to_Image/Views/_ViewStart.cshtml

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+@{
+    Layout = "_Layout";
+}

Videos/Chart_to_Image/appsettings.Development.json

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+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  }
+}