Create, read, and edit Excel files in Blazor

27 Jan 202524 minutes to read

Syncfusion Excel library for Blazor platform can be used to create, read, edit Excel files. This also convert Excel files to PDF.

Create a simple Excel report in Blazor Server-Side application

The below steps illustrates the creation of a simple Invoice formatted Excel document in Blazor Server-Side application.

Create a new C# Blazor Server-Side application project. Select Blazor App from the template and click the Next button.

Create Blazor Server Side application in Visual Studio

Now, the project configuration window will popup. Click Create button to create a new project with the required project name.

Create Blazor Server Side application in Visual Studio

Choose Blazor Server App and click Create button to create a new Blazor Server-Side application for .NET Core 3.0.0-preview9.

Create Blazor Server Side application in Visual Studio

Install the Syncfusion.XlsIO.Net.Core NuGet package as reference to your Blazor application from NuGet.org.

Install Syncfusion.XlsIO.Net.Core Nuget Package

Create a new C# Blazor Serevr app project using Visual Studio Code via Microsoft Templates.

Alternatively, create a Server application using the following command in the terminal(Ctrl+`).

dotnet new blazorserver -o CreateExcel
cd CreateExcel

To create a Excel document in Blazor Server app,run the following command to install Syncfusion.XlsIO.Net.Core to the Blazor project.

dotnet add package Syncfusion.XlsIO.Net.Core

NOTE

Starting with v16.2.0.x, if you reference Syncfusion^® assemblies from trial setup or from the NuGet feed, you also have to add “Syncfusion.Licensing” assembly reference and include a license key in your projects. Please refer to this link to know about registering Syncfusion^® license key in your applications to use our components.

Create a razor file with name as Excel under Pages folder and include the following namespaces in the file.

C#
@page "/Excel"
 @using System.IO;
 @using CreateExcel;
 @inject CreateExcel.Data.CreateExcel service
 @inject Microsoft.JSInterop.IJSRuntime JS

Add the following code to create a new button.

CSHTML
<h2>Syncfusion Excel library (Essential XlsIO)</h2>
 <p>Syncfusion Excel library (Essential XlsIO)  is a Blazor Excel library used to create, read, edit, and convert Excel files in your applications without Microsoft Office dependencies.</p>
 <button class="btn btn-primary" @onclick="@CreateExcel">Create Excel</button>

Add the following code in Excel.razor file to create and download the Excel document.

C#
@code {
     MemoryStream excelStream;
   
     /// <summary>
     /// Create and download the Excel document
     /// </summary>
     protected async void CreateExcel()
     {
         excelStream = service.CreateDocument();
         await JS.SaveAs("CreateExcel.xlsx", excelStream.ToArray());
     }
 }

Create a new cs file with name as CreateExcel under Data folder and include the following namespaces in the file.
- C#
@using Syncfusion.XlsIO; @using Syncfusion.Drawing; @using System.IO;

Create a new MemoryStream method with name as CreateDocument and include the following code snippet to create a simple Invoice formatted Excel document in Blazor Server-Side application.

C#
//Create an instance of ExcelEngine
 using (ExcelEngine excelEngine = new ExcelEngine())
 {
   IApplication application = excelEngine.Excel;
   application.DefaultVersion = ExcelVersion.Xlsx;
     
   //Create a workbook
   IWorkbook workbook = application.Workbooks.Create(1);
   IWorksheet worksheet = workbook.Worksheets[0];
     
   //Add a picture
   FileStream imageStream = new FileStream("AdventureCycle.png", FileMode.Open);
   Image image = Image.FromStream(imageStream);
   IPictureShape shape = worksheet.Pictures.AddPicture(1, 1, image, 20, 20);
     
   //Disable gridlines in the worksheet
   worksheet.IsGridLinesVisible = false;
     
   //Enter values to the cells from A3 to A5
   worksheet.Range["A3"].Text = "46036 Michigan Ave";
   worksheet.Range["A4"].Text = "Canton, USA";
   worksheet.Range["A5"].Text = "Phone: +1 231-231-2310";
     
   //Make the text bold
   worksheet.Range["A3:A5"].CellStyle.Font.Bold = true;
     
   //Merge cells
   worksheet.Range["D1:E1"].Merge();
     
   //Enter text to the cell D1 and apply formatting
   worksheet.Range["D1"].Text = "INVOICE";
   worksheet.Range["D1"].CellStyle.Font.Bold = true;
   worksheet.Range["D1"].CellStyle.Font.RGBColor = Color.FromArgb(42, 118, 189);
   worksheet.Range["D1"].CellStyle.Font.Size = 35;
     
   //Apply alignment in the cell D1
   worksheet.Range["D1"].CellStyle.HorizontalAlignment = ExcelHAlign.HAlignRight;
   worksheet.Range["D1"].CellStyle.VerticalAlignment = ExcelVAlign.VAlignTop;
     
   //Enter values to the cells from D5 to E8
   worksheet.Range["D5"].Text = "INVOICE#";
   worksheet.Range["E5"].Text = "DATE";
   worksheet.Range["D6"].Number = 1028;
   worksheet.Range["E6"].Value = "12/31/2018";
   worksheet.Range["D7"].Text = "CUSTOMER ID";
   worksheet.Range["E7"].Text = "TERMS";
   worksheet.Range["D8"].Number = 564;
   worksheet.Range["E8"].Text = "Due Upon Receipt";
     
   //Apply RGB backcolor to the cells from D5 to E8
   worksheet.Range["D5:E5"].CellStyle.Color = Color.FromArgb(42, 118, 189);
   worksheet.Range["D7:E7"].CellStyle.Color = Color.FromArgb(42, 118, 189);
     
   //Apply known colors to the text in cells D5 to E8
   worksheet.Range["D5:E5"].CellStyle.Font.Color = ExcelKnownColors.White;
   worksheet.Range["D7:E7"].CellStyle.Font.Color = ExcelKnownColors.White;
     
   //Make the text as bold from D5 to E8
   worksheet.Range["D5:E8"].CellStyle.Font.Bold = true;
     
   //Apply alignment to the cells from D5 to E8
   worksheet.Range["D5:E8"].CellStyle.HorizontalAlignment = ExcelHAlign.HAlignCenter;
   worksheet.Range["D5:E5"].CellStyle.VerticalAlignment = ExcelVAlign.VAlignCenter;
   worksheet.Range["D7:E7"].CellStyle.VerticalAlignment = ExcelVAlign.VAlignCenter;
   worksheet.Range["D6:E6"].CellStyle.VerticalAlignment = ExcelVAlign.VAlignTop;
     
   //Enter value and applying formatting in the cell A7
   worksheet.Range["A7"].Text = "  BILL TO";
   worksheet.Range["A7"].CellStyle.Color = Color.FromArgb(42, 118, 189);
   worksheet.Range["A7"].CellStyle.Font.Bold = true;
   worksheet.Range["A7"].CellStyle.Font.Color = ExcelKnownColors.White;
     
   //Apply alignment
   worksheet.Range["A7"].CellStyle.HorizontalAlignment = ExcelHAlign.HAlignLeft;
   worksheet.Range["A7"].CellStyle.VerticalAlignment = ExcelVAlign.VAlignCenter;
     
   //Enter values in the cells A8 to A12
   worksheet.Range["A8"].Text = "Steyn";
   worksheet.Range["A9"].Text = "Great Lakes Food Market";
   worksheet.Range["A10"].Text = "20 Whitehall Rd";
   worksheet.Range["A11"].Text = "North Muskegon,USA";
   worksheet.Range["A12"].Text = "+1 231-654-0000";
     
   //Create a Hyperlink for e-mail in the cell A13
   IHyperLink hyperlink = worksheet.HyperLinks.Add(worksheet.Range["A13"]);
   hyperlink.Type = ExcelHyperLinkType.Url;
   hyperlink.Address = "[email protected]";
   hyperlink.ScreenTip = "Send Mail";
     
   //Merge column A and B from row 15 to 22
   worksheet.Range["A15:B15"].Merge();
   worksheet.Range["A16:B16"].Merge();
   worksheet.Range["A17:B17"].Merge();
   worksheet.Range["A18:B18"].Merge();
   worksheet.Range["A19:B19"].Merge();
   worksheet.Range["A20:B20"].Merge();
   worksheet.Range["A21:B21"].Merge();
   worksheet.Range["A22:B22"].Merge();
     
   //Enter details of products and prices
   worksheet.Range["A15"].Text = "  DESCRIPTION";
   worksheet.Range["C15"].Text = "QTY";
   worksheet.Range["D15"].Text = "UNIT PRICE";
   worksheet.Range["E15"].Text = "AMOUNT";
   worksheet.Range["A16"].Text = "Cabrales Cheese";
   worksheet.Range["A17"].Text = "Chocos";
   worksheet.Range["A18"].Text = "Pasta";
   worksheet.Range["A19"].Text = "Cereals";
   worksheet.Range["A20"].Text = "Ice Cream";
   worksheet.Range["C16"].Number = 3;
   worksheet.Range["C17"].Number = 2;
   worksheet.Range["C18"].Number = 1;
   worksheet.Range["C19"].Number = 4;
   worksheet.Range["C20"].Number = 3;
   worksheet.Range["D16"].Number = 21;
   worksheet.Range["D17"].Number = 54;
   worksheet.Range["D18"].Number = 10;
   worksheet.Range["D19"].Number = 20;
   worksheet.Range["D20"].Number = 30;
   worksheet.Range["D23"].Text = "Total";
     
   //Apply number format
   worksheet.Range["D16:E22"].NumberFormat = "$0.00";
   worksheet.Range["E23"].NumberFormat = "$0.00";
     
   //Apply incremental formula for column Amount by multiplying Qty and UnitPrice
   application.EnableIncrementalFormula = true;
   worksheet.Range["E16:E20"].Formula = "=C16*D16";
     
   //Formula for Sum the total
   worksheet.Range["E23"].Formula = "=SUM(E16:E22)";
     
   //Apply borders
   worksheet.Range["A16:E22"].CellStyle.Borders[ExcelBordersIndex.EdgeTop].LineStyle = ExcelLineStyle.Thin;
   worksheet.Range["A16:E22"].CellStyle.Borders[ExcelBordersIndex.EdgeBottom].LineStyle = ExcelLineStyle.Thin;
   worksheet.Range["A16:E22"].CellStyle.Borders[ExcelBordersIndex.EdgeTop].Color = ExcelKnownColors.Grey_25_percent;
   worksheet.Range["A16:E22"].CellStyle.Borders[ExcelBordersIndex.EdgeBottom].Color = ExcelKnownColors.Grey_25_percent;
   worksheet.Range["A23:E23"].CellStyle.Borders[ExcelBordersIndex.EdgeTop].LineStyle = ExcelLineStyle.Thin;
   worksheet.Range["A23:E23"].CellStyle.Borders[ExcelBordersIndex.EdgeBottom].LineStyle = ExcelLineStyle.Thin;
   worksheet.Range["A23:E23"].CellStyle.Borders[ExcelBordersIndex.EdgeTop].Color = ExcelKnownColors.Black;
   worksheet.Range["A23:E23"].CellStyle.Borders[ExcelBordersIndex.EdgeBottom].Color = ExcelKnownColors.Black;
     
   //Apply font setting for cells with product details
   worksheet.Range["A3:E23"].CellStyle.Font.FontName = "Arial";
   worksheet.Range["A3:E23"].CellStyle.Font.Size = 10;
   worksheet.Range["A15:E15"].CellStyle.Font.Color = ExcelKnownColors.White;
   worksheet.Range["A15:E15"].CellStyle.Font.Bold = true;
   worksheet.Range["D23:E23"].CellStyle.Font.Bold = true;
     
   //Apply cell color
   worksheet.Range["A15:E15"].CellStyle.Color = Color.FromArgb(42, 118, 189);
     
   //Apply alignment to cells with product details
   worksheet.Range["A15"].CellStyle.HorizontalAlignment = ExcelHAlign.HAlignLeft;
   worksheet.Range["C15:C22"].CellStyle.HorizontalAlignment = ExcelHAlign.HAlignCenter;
   worksheet.Range["D15:E15"].CellStyle.HorizontalAlignment = ExcelHAlign.HAlignCenter;
     
   //Apply row height and column width to look good
   worksheet.Range["A1"].ColumnWidth = 36;
   worksheet.Range["B1"].ColumnWidth = 11;
   worksheet.Range["C1"].ColumnWidth = 8;
   worksheet.Range["D1:E1"].ColumnWidth = 18;
   worksheet.Range["A1"].RowHeight = 47;
   worksheet.Range["A2"].RowHeight = 15;
   worksheet.Range["A3:A4"].RowHeight = 15;
   worksheet.Range["A5"].RowHeight = 18;
   worksheet.Range["A6"].RowHeight = 29;
   worksheet.Range["A7"].RowHeight = 18;
   worksheet.Range["A8"].RowHeight = 15;
   worksheet.Range["A9:A14"].RowHeight = 15;
   worksheet.Range["A15:A23"].RowHeight = 18;
     
   //Save the document as a stream and retrun the stream.
   using (MemoryStream stream = new MemoryStream())
   {
     //Save the created Excel document to MemoryStream
     workbook.SaveAs(stream);
     return stream;
   }
 }

Create a new class file in the project, with name as FileUtils and add the following code to invoke the JavaScript action for downloading the file in browser.

C#
public static class FileUtils
 {
     public static ValueTask<object> SaveAs(this IJSRuntime js, string filename, byte[] data)
         => js.InvokeAsync<object>(
            "saveAsFile",
            filename,
            Convert.ToBase64String(data));
 }

Add the following JavaScript function in the _Host.cshtml file present under Pages folder.

C#
<script type="text/javascript">
   function saveAsFile(filename, bytesBase64) {
   
   if (navigator.msSaveBlob) 
   {
     //Download document in Edge browser
     var data = window.atob(bytesBase64);
     var bytes = new Uint8Array(data.length);
     for (var i = 0; i < data.length; i++) 
     {
       bytes[i] = data.charCodeAt(i);
     }
     var blob = new Blob([bytes.buffer], { type: "application/octet-stream" });
     navigator.msSaveBlob(blob, filename);
   }
   else 
   {
     var link = document.createElement('a');
     link.download = filename;
     link.href = "data:application/octet-stream;base64," + bytesBase64;
     document.body.appendChild(link); // Needed for Firefox
     link.click();
     document.body.removeChild(link);
   }
 }
 </script>

Add the following code under NavMenu.razor file present under Shared folder.

C#
<li class="nav-item px-3">
  <NavLink class="nav-link" href="Excel">
    <span class="oi oi-list-rich" aria-hidden="true"></span> Create Excel
  </NavLink>
</li>

Add the service to services collection in ConfigureServices method of Startup.cs file.

C#
services.AddSingleton<ExcelService>();

A complete working example of how to create an Excel file in Blazor Server-Side application in C# is present on this GitHub page.

By executing the program, you will get the Excel file as below.
Output File

Read and Edit Excel file in Blazor Server-Side application

The below code snippet illustrates how to read and edit an Excel file in Blazor Server-Side application.

C#
//Create an instance of ExcelEngine
using (ExcelEngine excelEngine = new ExcelEngine())
{
  //Instantiate the Excel application object
  IApplication application = excelEngine.Excel;
  
  //Set the default application version
  application.DefaultVersion = ExcelVersion.Xlsx;
  
  //Load the existing Excel workbook into IWorkbook
  FileStream inputStream = new FileStream("Sample.xlsx", FileMode.Open);
  IWorkbook workbook = application.Workbooks.Open(inputStream);
  
  //Get the first worksheet in the workbook into IWorksheet
  IWorksheet worksheet = workbook.Worksheets[0];
  
  //Assign some text in a cell
  worksheet.Range["A3"].Text = "Hello World";
  
  //Access a cell value from Excel
  var value = worksheet.Range["A1"].Value;
  
  //Save the document as a stream and retrun the stream.
  using (MemoryStream stream = new MemoryStream())
  {
    //Save the created Excel document to MemoryStream.
    workbook.SaveAs(stream);
  
    return stream;
  }
}

A complete working example of how to read and edit an Excel file in Blazor Server-Side application in C# is present on this GitHub page.

Create a simple Excel report in Blazor Client-Side application

The below steps illustrates the creation of a simple Invoice formatted Excel document in Blazor Client-Side application.

Create a new C# Blazor Client-Side application project. Select Blazor App from the template and click the Next button.

Create Blazor Client Side application in Visual Studio

Now, the project configuration window will popup. Click Create button to create a new project with the required project name.

Create Blazor Client Side application in Visual Studio

Choose Blazor WebAssembly App and click Create button to create a new Blazor Client-Side application for .NET Core 3.0.0-preview9.

Create Blazor Client Side application in Visual Studio

Install the Syncfusion.XlsIO.Net.Core NuGet package as reference to your Blazor application from NuGet.org.

Install Syncfusion.XlsIO.Net.Core Nuget Package

Create a new C# Blazor Client-Side app project using Visual Studio Code via Microsoft Templates.

Alternatively, create a Client application using the following command in the terminal(Ctrl+`).

dotnet new blazorwasm -o CreateExcel
cd CreateExcel

To create a Excel document in Blazor WASM app,run the following command to install Syncfusion.XlsIO.Net.Core to the Blazor project.

dotnet add package Syncfusion.XlsIO.Net.Core

NOTE

Starting with v16.2.0.x, if you reference Syncfusion^® assemblies from trial setup or from the NuGet feed, you also have to add “Syncfusion.Licensing” assembly reference and include a license key in your projects. Please refer to this link to know about registering Syncfusion^® license key in your applications to use our components.

Create a razor file with name as Excel under Pages folder and add the following namespaces in the file.

C#
@page "/Excel"
 @using Syncfusion.XlsIO;
 @using Syncfusion.Drawing;
 @using System.IO;
 @inject Microsoft.JSInterop.IJSRuntime JS

Add the following code to create a new button.

CSHTML
<h2>Syncfusion Excel library (Essential XlsIO)</h2>
 <p>Syncfusion Excel library (Essential XlsIO)  is a Blazor Excel library used to create, read, edit, and convert Excel files in your applications without Microsoft Office dependencies.</p>
 <button class="btn btn-primary" @onclick="@CreateDocument">Create Document</button>

Create a new async method with name as CreateDocument and include the following code snippet to create a simple Invoice formatted Excel document in Blazor Client-Side application.

C#
//Create an instance of ExcelEngine
 using (ExcelEngine excelEngine = new ExcelEngine())
 {
   IApplication application = excelEngine.Excel;
   application.DefaultVersion = ExcelVersion.Xlsx;
     
   //Create a workbook
   IWorkbook workbook = application.Workbooks.Create(1);
   IWorksheet worksheet = workbook.Worksheets[0];
     
   //Disable gridlines in the worksheet
   worksheet.IsGridLinesVisible = false;
     
   //Enter values to the cells from A3 to A5
   worksheet.Range["A3"].Text = "46036 Michigan Ave";
   worksheet.Range["A4"].Text = "Canton, USA";
   worksheet.Range["A5"].Text = "Phone: +1 231-231-2310";
     
   //Make the text bold
   worksheet.Range["A3:A5"].CellStyle.Font.Bold = true;
     
   //Merge cells
   worksheet.Range["D1:E1"].Merge();
     
   //Enter text to the cell B1 and apply formatting
   worksheet.Range["B1"].Text = "INVOICE";
   worksheet.Range["B1"].CellStyle.Font.Bold = true;
   worksheet.Range["B1"].CellStyle.Font.RGBColor = Color.FromArgb(42, 118, 189);
   worksheet.Range["B1"].CellStyle.Font.Size = 35;
     
   //Apply alignment in the cell B1
   worksheet.Range["B1"].CellStyle.HorizontalAlignment = ExcelHAlign.HAlignCenter;
   worksheet.Range["B1"].CellStyle.VerticalAlignment = ExcelVAlign.VAlignTop;
     
   //Enter values to the cells from D5 to E8
   worksheet.Range["D5"].Text = "INVOICE#";
   worksheet.Range["E5"].Text = "DATE";
   worksheet.Range["D6"].Number = 1028;
   worksheet.Range["E6"].Value = "12/31/2018";
   worksheet.Range["D7"].Text = "CUSTOMER ID";
   worksheet.Range["E7"].Text = "TERMS";
   worksheet.Range["D8"].Number = 564;
   worksheet.Range["E8"].Text = "Due Upon Receipt";
     
   //Apply RGB backcolor to the cells from D5 to E8
   worksheet.Range["D5:E5"].CellStyle.Color = Color.FromArgb(42, 118, 189);
   worksheet.Range["D7:E7"].CellStyle.Color = Color.FromArgb(42, 118, 189);
     
   //Apply known colors to the text in cells D5 to E8
   worksheet.Range["D5:E5"].CellStyle.Font.Color = ExcelKnownColors.White;
   worksheet.Range["D7:E7"].CellStyle.Font.Color = ExcelKnownColors.White;
     
   //Make the text as bold from D5 to E8
   worksheet.Range["D5:E8"].CellStyle.Font.Bold = true;
     
   //Apply alignment to the cells from D5 to E8
   worksheet.Range["D5:E8"].CellStyle.HorizontalAlignment = ExcelHAlign.HAlignCenter;
   worksheet.Range["D5:E5"].CellStyle.VerticalAlignment = ExcelVAlign.VAlignCenter;
   worksheet.Range["D7:E7"].CellStyle.VerticalAlignment = ExcelVAlign.VAlignCenter;
   worksheet.Range["D6:E6"].CellStyle.VerticalAlignment = ExcelVAlign.VAlignTop;
     
   //Enter value and applying formatting in the cell A7
   worksheet.Range["A7"].Text = "  BILL TO";
   worksheet.Range["A7"].CellStyle.Color = Color.FromArgb(42, 118, 189);
   worksheet.Range["A7"].CellStyle.Font.Bold = true;
   worksheet.Range["A7"].CellStyle.Font.Color = ExcelKnownColors.White;
     
   //Apply alignment
   worksheet.Range["A7"].CellStyle.HorizontalAlignment = ExcelHAlign.HAlignLeft;
   worksheet.Range["A7"].CellStyle.VerticalAlignment = ExcelVAlign.VAlignCenter;
     
   //Enter values in the cells A8 to A12
   worksheet.Range["A8"].Text = "Steyn";
   worksheet.Range["A9"].Text = "Great Lakes Food Market";
   worksheet.Range["A10"].Text = "20 Whitehall Rd";
   worksheet.Range["A11"].Text = "North Muskegon,USA";
   worksheet.Range["A12"].Text = "+1 231-654-0000";
     
   //Create a Hyperlink for e-mail in the cell A13
   IHyperLink hyperlink = worksheet.HyperLinks.Add(worksheet.Range["A13"]);
   hyperlink.Type = ExcelHyperLinkType.Url;
   hyperlink.Address = "[email protected]";
   hyperlink.ScreenTip = "Send Mail";
     
   //Merge column A and B from row 15 to 22
   worksheet.Range["A15:B15"].Merge();
   worksheet.Range["A16:B16"].Merge();
   worksheet.Range["A17:B17"].Merge();
   worksheet.Range["A18:B18"].Merge();
   worksheet.Range["A19:B19"].Merge();
   worksheet.Range["A20:B20"].Merge();
   worksheet.Range["A21:B21"].Merge();
   worksheet.Range["A22:B22"].Merge();
     
   //Enter details of products and prices
   worksheet.Range["A15"].Text = "  DESCRIPTION";
   worksheet.Range["C15"].Text = "QTY";
   worksheet.Range["D15"].Text = "UNIT PRICE";
   worksheet.Range["E15"].Text = "AMOUNT";
   worksheet.Range["A16"].Text = "Cabrales Cheese";
   worksheet.Range["A17"].Text = "Chocos";
   worksheet.Range["A18"].Text = "Pasta";
   worksheet.Range["A19"].Text = "Cereals";
   worksheet.Range["A20"].Text = "Ice Cream";
   worksheet.Range["C16"].Number = 3;
   worksheet.Range["C17"].Number = 2;
   worksheet.Range["C18"].Number = 1;
   worksheet.Range["C19"].Number = 4;
   worksheet.Range["C20"].Number = 3;
   worksheet.Range["D16"].Number = 21;
   worksheet.Range["D17"].Number = 54;
   worksheet.Range["D18"].Number = 10;
   worksheet.Range["D19"].Number = 20;
   worksheet.Range["D20"].Number = 30;
   worksheet.Range["D23"].Text = "Total";
     
   //Apply number format
   worksheet.Range["D16:E22"].NumberFormat = "$0.00";
   worksheet.Range["E23"].NumberFormat = "$0.00";
     
   //Apply incremental formula for column Amount by multiplying Qty and UnitPrice
   application.EnableIncrementalFormula = true;
   worksheet.Range["E16:E20"].Formula = "=C16*D16";
     
   //Formula for Sum the total
   worksheet.Range["E23"].Formula = "=SUM(E16:E22)";
     
   //Apply borders
   worksheet.Range["A16:E22"].CellStyle.Borders[ExcelBordersIndex.EdgeTop].LineStyle = ExcelLineStyle.Thin;
   worksheet.Range["A16:E22"].CellStyle.Borders[ExcelBordersIndex.EdgeBottom].LineStyle = ExcelLineStyle.Thin;
   worksheet.Range["A16:E22"].CellStyle.Borders[ExcelBordersIndex.EdgeTop].Color = ExcelKnownColors.Grey_25_percent;
   worksheet.Range["A16:E22"].CellStyle.Borders[ExcelBordersIndex.EdgeBottom].Color = ExcelKnownColors.Grey_25_percent;
   worksheet.Range["A23:E23"].CellStyle.Borders[ExcelBordersIndex.EdgeTop].LineStyle = ExcelLineStyle.Thin;
   worksheet.Range["A23:E23"].CellStyle.Borders[ExcelBordersIndex.EdgeBottom].LineStyle = ExcelLineStyle.Thin;
   worksheet.Range["A23:E23"].CellStyle.Borders[ExcelBordersIndex.EdgeTop].Color = ExcelKnownColors.Black;
   worksheet.Range["A23:E23"].CellStyle.Borders[ExcelBordersIndex.EdgeBottom].Color = ExcelKnownColors.Black;
     
   //Apply font setting for cells with product details
   worksheet.Range["A3:E23"].CellStyle.Font.FontName = "Arial";
   worksheet.Range["A3:E23"].CellStyle.Font.Size = 10;
   worksheet.Range["A15:E15"].CellStyle.Font.Color = ExcelKnownColors.White;
   worksheet.Range["A15:E15"].CellStyle.Font.Bold = true;
   worksheet.Range["D23:E23"].CellStyle.Font.Bold = true;
     
   //Apply cell color
   worksheet.Range["A15:E15"].CellStyle.Color = Color.FromArgb(42, 118, 189);
     
   //Apply alignment to cells with product details
   worksheet.Range["A15"].CellStyle.HorizontalAlignment = ExcelHAlign.HAlignLeft;
   worksheet.Range["C15:C22"].CellStyle.HorizontalAlignment = ExcelHAlign.HAlignCenter;
   worksheet.Range["D15:E15"].CellStyle.HorizontalAlignment = ExcelHAlign.HAlignCenter;
     
   //Apply row height and column width to look good
   worksheet.Range["A1"].ColumnWidth = 36;
   worksheet.Range["B1"].ColumnWidth = 11;
   worksheet.Range["C1"].ColumnWidth = 8;
   worksheet.Range["D1:E1"].ColumnWidth = 18;
   worksheet.Range["A1"].RowHeight = 47;
   worksheet.Range["A2"].RowHeight = 15;
   worksheet.Range["A3:A4"].RowHeight = 15;
   worksheet.Range["A5"].RowHeight = 18;
   worksheet.Range["A6"].RowHeight = 29;
   worksheet.Range["A7"].RowHeight = 18;
   worksheet.Range["A8"].RowHeight = 15;
   worksheet.Range["A9:A14"].RowHeight = 15;
   worksheet.Range["A15:A23"].RowHeight = 18;
     
   //Save the document as a stream and retrun the stream.
   using (MemoryStream stream = new MemoryStream())
   {
     //Save the created Excel document to MemoryStream
     workbook.SaveAs(stream);
       
     //Download the excel file
     await JS.SaveAs("Sample.xlsx", stream.ToArray());
   }
 }

Create a class file with name as FileUtils and add the following code to invoke the JavaScript action for downloading the file in browser.

C#
public static class FileUtils
 {
     public static ValueTask<object> SaveAs(this IJSRuntime js, string filename, byte[] data)
         => js.InvokeAsync<object>(
            "saveAsFile",
            filename,
            Convert.ToBase64String(data));
 }

Add the following JavaScript function in the index.html file present under wwwroot.

C#
<script type="text/javascript">
   function saveAsFile(filename, bytesBase64) {
   
   if (navigator.msSaveBlob) 
   {
     //Download document in Edge browser
     var data = window.atob(bytesBase64);
     var bytes = new Uint8Array(data.length);
     for (var i = 0; i < data.length; i++) 
     {
       bytes[i] = data.charCodeAt(i);
     }
     var blob = new Blob([bytes.buffer], { type: "application/octet-stream" });
     navigator.msSaveBlob(blob, filename);
   }
   else 
   {
     var link = document.createElement('a');
     link.download = filename;
     link.href = "data:application/octet-stream;base64," + bytesBase64;
     document.body.appendChild(link); // Needed for Firefox
     link.click();
     document.body.removeChild(link);
   }
 }
 </script>

Add the following code under NavMenu.razor file present under Shared folder.

C#
<li class="nav-item px-3">
  <NavLink class="nav-link" href="Excel">
    <span class="oi oi-list-rich" aria-hidden="true"></span> Create Excel
  </NavLink>
</li>

A complete working example of how to create an Excel file in Blazor Client-Side Application in C# is present on this GitHub page.

By executing the program, you will get the Excel file as below.
Output File

Read and Edit Excel file in Blazor Client-Side application

The below code snippet illustrates how to read and edit an Excel file in Blazor Client-Side application.

C#
//Create an instance of ExcelEngine
using (ExcelEngine excelEngine = new ExcelEngine())
{
  //Instantiate the Excel application object
  IApplication application = excelEngine.Excel;

  //Set the default application version
  application.DefaultVersion = ExcelVersion.Xlsx;

  //Load the existing Excel workbook into IWorkbook
  Stream inputStream = await client.GetStreamAsync("sample-data/Sample.xlsx");
  IWorkbook workbook = application.Workbooks.Open(inputStream);

  //Get the first worksheet in the workbook into IWorksheet
  IWorksheet worksheet = workbook.Worksheets[0];

  //Assign some text in a cell
  worksheet.Range["A3"].Text = "Hello World";

  //Access a cell value from Excel
  var value = worksheet.Range["A1"].Value;

  //Save the document as a stream and retrun the stream.
  using (MemoryStream stream = new MemoryStream())
  {
    //Save the created Excel document to MemoryStream
    workbook.SaveAs(stream);

    //Download the excel file
    await JS.SaveAs("Output.xlsx", stream.ToArray());
  }
}

A complete working example of how to read and edit an Excel file in Blazor Client-Side application in C# is present on this GitHub page.

NOTE

It is recommended to use Blazor Server-Side application to reduce the pay back load which is high in Blazor Client-Side.

Click here to explore the rich set of Syncfusion^® Excel library (Excel) features.

An online sample link to create an Excel document in Blazor.

Convert Excel to Image in Blazor Client-Side application

Create a new C# Blazor Client-Side project with target framework as .NET 8.0 by referring link

Install the SkiaSharp.Views.Blazor along with Syncfusion.XlsIORenderer.Net.Core from nuget.org.

Install the SkiaSharp.Views.Blazor along with Syncfusion.XlsIORenderer.Net.Core.

dotnet add package SkiaSharp.Views.Blazor
dotnet add package Syncfusion.XlsIORenderer.Net.Core

Add below tag in your Blazor WASM csproj file.

CSHTML
<ItemGroup>
<NativeFileReference Include="$(SkiaSharpStaticLibraryPath)\2.0.23\*.a" />
</ItemGroup>

NOTE

Install wasm-tools and wasm-tools-net6 using dotnet workload install wasm-tools and dotnet workload install wasm-tools-net6 commands respectively, while facing issues related to skiasharp, during runtime.

Enable the below properties in csproj file.

CSHTML
<WasmNativeStrip>true</WasmNativeStrip>
<RunAOTCompilation>true</RunAOTCompilation>

Add the below code snippet in button click.

C#
//Create an instance of ExcelEngine
using (ExcelEngine excelEngine = new ExcelEngine())
{
  IApplication application = excelEngine.Excel;
  application.DefaultVersion = ExcelVersion.Xlsx;

  //Load the Excel document
  Stream fileStream = await client.GetStreamAsync("sample-data/InputTemplate.xlsx");
  IWorkbook workbook = application.Workbooks.Open(fileStream);
  IWorksheet worksheet = workbook.Worksheets[0];

  //Initialize XlsIORenderer
  application.XlsIORenderer = new XlsIORenderer();

  //Initialize MemoryStream
  using (MemoryStream stream = new MemoryStream())
  {
    //Convert worksheet to image
    worksheet.ConvertToImage(worksheet.UsedRange, stream);

    //Download the png file
    await JS.SaveAs("ExcelToImage.png", stream.ToArray());
  }
}

A complete working example of how to convert an Excel worksheet to image in Blazor Client-Side application in C# is present on this GitHub page.

Convert Excel to PDF in Blazor Client-Side application

Create a new C# Blazor Client-Side project with target framework as .NET 8.0 by referring link

Install the SkiaSharp.Views.Blazor along with Syncfusion.XlsIORenderer.Net.Core from nuget.org.

Install the SkiaSharp.Views.Blazor along with Syncfusion.XlsIORenderer.Net.Core.

dotnet add package SkiaSharp.Views.Blazor
dotnet add package Syncfusion.XlsIORenderer.Net.Core

Add below tag in your Blazor WASM csproj file.

CSHTML
<ItemGroup>
<NativeFileReference Include="$(SkiaSharpStaticLibraryPath)\2.0.23\*.a" />
</ItemGroup>

NOTE

Install wasm-tools and wasm-tools-net6 using dotnet workload install wasm-tools and dotnet workload install wasm-tools-net6 commands respectively, while facing issues related to skiasharp, during runtime.

Enable the below properties in csproj file.

CSHTML
<WasmNativeStrip>true</WasmNativeStrip>
<RunAOTCompilation>true</RunAOTCompilation>

Add the below code snippet in button click.

C#
//Create an instance of ExcelEngine
using (ExcelEngine excelEngine = new ExcelEngine())
{
  IApplication application = excelEngine.Excel;
  application.DefaultVersion = ExcelVersion.Xlsx;

  //Load the Excel document
  Stream fileStream = await client.GetStreamAsync("sample-data/InputTemplate.xlsx");
  IWorkbook workbook = application.Workbooks.Open(fileStream);

  //Initialize XlsIORenderer
  XlsIORenderer renderer = new XlsIORenderer();

  //Convert Excel document into PDF document
  PdfDocument pdfDocument = renderer.ConvertToPDF(workbook);

  //Initialize MemoryStream
  using (MemoryStream stream = new MemoryStream())
  {
    //Save the created PDF document to MemoryStream
    pdfDocument.Save(stream);

    //Download the pdf file
    await JS.SaveAs("ExcelToPDF.pdf", stream.ToArray());
  }
}

A complete working example of how to convert an Excel file to PDF in Blazor Client-Side application in C# is present on this GitHub page.

NOTE

Starting with v16.2.0.x, if you reference Syncfusion^® assemblies from trial setup or from the NuGet feed, you also have to add “Syncfusion.Licensing” assembly reference and include a license key in your projects. Please refer to this link to know about registering Syncfusion^® license key in your applications to use our components. You can also explore our Blazor Excel library demo that shows how to create and modify Excel files from C# with just five lines of code.

Create a simple Excel report in Blazor Server-Side Web application

The below steps illustrates the creation of a simple Invoice formatted Excel document in Blazor Server-Side web application.

Create a new C# Blazor Web application project.

Create Blazor Server Side web application in Visual Studio

Name the project.

Name the Blazor Web Server Side application in Visual Studio

Select the framework and click Create button.

Select the framework in Blazor Server Side application in Visual Studio

Install the Syncfusion.XlsIO.Net.Core NuGet package as reference to your Blazor web application from NuGet.org.

Install Syncfusion.XlsIO.Net.Core Nuget Package

Create a new C# Blazor Server-Side Web app project using Visual Studio Code via Microsoft Templates.

Alternatively, create a Server-Side Web application using the following command in the terminal(Ctrl+`).

dotnet new blazor -o CreateExcel
cd CreateExcel

To create a Excel document in Blazor Server app,run the following command to install Syncfusion.XlsIO.Net.Core to the Blazor project.

dotnet add package Syncfusion.XlsIO.Net.Core

NOTE

Starting with v16.2.0.x, if you reference Syncfusion^® assemblies from trial setup or from the NuGet feed, you also have to add “Syncfusion.Licensing” assembly reference and include a license key in your projects. Please refer to this link to know about registering Syncfusion^® license key in your applications to use our components.

Create a razor file with name as Excel under Pages folder, which is located inside the Components folder and include the following namespaces in the file.

C#
@rendermode InteractiveServer
 @page "/excel"
 @using System.IO;
 @using Create_Excel;
 @inject Create_Excel.Components.Data.ExcelService service
 @inject Microsoft.JSInterop.IJSRuntime JS

Add the following code to create a new button.

CSHTML
<h2>Syncfusion Excel library (Essential XlsIO)</h2>
 <p>Syncfusion Excel library (Essential XlsIO)  is a Blazor Excel library used to create, read, edit, and convert Excel files in your applications without Microsoft Office dependencies.</p>
 <button class="btn btn-primary" @onclick="@CreateDocument">Create Document</button>

Add the following code in Excel.razor file to create and download the Excel document.

C#
@code {
     MemoryStream excelStream;
   
     /// <summary>
     /// Create and download the Excel document
     /// </summary>
     protected async void CreateDocument()
     {
         excelStream = service.CreateExcel();
         await JS.SaveAs("Sample.xlsx", excelStream.ToArray());
     }
 }

Create a new cs file with name as ExcelService under Data folder and include the following namespaces in the file.
- C#
using Syncfusion.XlsIO; using Syncfusion.Drawing; using System.IO;

Create a new MemoryStream method with name as CreateExcel and include the following code snippet to create a simple Invoice formatted Excel document in Blazor Server-Side web application.

C#
//Create an instance of ExcelEngine
 using (ExcelEngine excelEngine = new ExcelEngine())
 {
   IApplication application = excelEngine.Excel;
   application.DefaultVersion = ExcelVersion.Xlsx;
     
   //Create a workbook
   IWorkbook workbook = application.Workbooks.Create(1);
   IWorksheet worksheet = workbook.Worksheets[0];
     
   //Add a picture
   FileStream imageStream = new FileStream("AdventureCycle.png", FileMode.Open);
   Image image = Image.FromStream(imageStream);
   IPictureShape shape = worksheet.Pictures.AddPicture(1, 1, image, 20, 20);
     
   //Disable gridlines in the worksheet
   worksheet.IsGridLinesVisible = false;
     
   //Enter values to the cells from A3 to A5
   worksheet.Range["A3"].Text = "46036 Michigan Ave";
   worksheet.Range["A4"].Text = "Canton, USA";
   worksheet.Range["A5"].Text = "Phone: +1 231-231-2310";
     
   //Make the text bold
   worksheet.Range["A3:A5"].CellStyle.Font.Bold = true;
     
   //Merge cells
   worksheet.Range["D1:E1"].Merge();
     
   //Enter text to the cell D1 and apply formatting
   worksheet.Range["D1"].Text = "INVOICE";
   worksheet.Range["D1"].CellStyle.Font.Bold = true;
   worksheet.Range["D1"].CellStyle.Font.RGBColor = Color.FromArgb(42, 118, 189);
   worksheet.Range["D1"].CellStyle.Font.Size = 35;
     
   //Apply alignment in the cell D1
   worksheet.Range["D1"].CellStyle.HorizontalAlignment = ExcelHAlign.HAlignRight;
   worksheet.Range["D1"].CellStyle.VerticalAlignment = ExcelVAlign.VAlignTop;
     
   //Enter values to the cells from D5 to E8
   worksheet.Range["D5"].Text = "INVOICE#";
   worksheet.Range["E5"].Text = "DATE";
   worksheet.Range["D6"].Number = 1028;
   worksheet.Range["E6"].Value = "12/31/2018";
   worksheet.Range["D7"].Text = "CUSTOMER ID";
   worksheet.Range["E7"].Text = "TERMS";
   worksheet.Range["D8"].Number = 564;
   worksheet.Range["E8"].Text = "Due Upon Receipt";
     
   //Apply RGB backcolor to the cells from D5 to E8
   worksheet.Range["D5:E5"].CellStyle.Color = Color.FromArgb(42, 118, 189);
   worksheet.Range["D7:E7"].CellStyle.Color = Color.FromArgb(42, 118, 189);
     
   //Apply known colors to the text in cells D5 to E8
   worksheet.Range["D5:E5"].CellStyle.Font.Color = ExcelKnownColors.White;
   worksheet.Range["D7:E7"].CellStyle.Font.Color = ExcelKnownColors.White;
     
   //Make the text as bold from D5 to E8
   worksheet.Range["D5:E8"].CellStyle.Font.Bold = true;
     
   //Apply alignment to the cells from D5 to E8
   worksheet.Range["D5:E8"].CellStyle.HorizontalAlignment = ExcelHAlign.HAlignCenter;
   worksheet.Range["D5:E5"].CellStyle.VerticalAlignment = ExcelVAlign.VAlignCenter;
   worksheet.Range["D7:E7"].CellStyle.VerticalAlignment = ExcelVAlign.VAlignCenter;
   worksheet.Range["D6:E6"].CellStyle.VerticalAlignment = ExcelVAlign.VAlignTop;
     
   //Enter value and applying formatting in the cell A7
   worksheet.Range["A7"].Text = "  BILL TO";
   worksheet.Range["A7"].CellStyle.Color = Color.FromArgb(42, 118, 189);
   worksheet.Range["A7"].CellStyle.Font.Bold = true;
   worksheet.Range["A7"].CellStyle.Font.Color = ExcelKnownColors.White;
     
   //Apply alignment
   worksheet.Range["A7"].CellStyle.HorizontalAlignment = ExcelHAlign.HAlignLeft;
   worksheet.Range["A7"].CellStyle.VerticalAlignment = ExcelVAlign.VAlignCenter;
     
   //Enter values in the cells A8 to A12
   worksheet.Range["A8"].Text = "Steyn";
   worksheet.Range["A9"].Text = "Great Lakes Food Market";
   worksheet.Range["A10"].Text = "20 Whitehall Rd";
   worksheet.Range["A11"].Text = "North Muskegon,USA";
   worksheet.Range["A12"].Text = "+1 231-654-0000";
     
   //Create a Hyperlink for e-mail in the cell A13
   IHyperLink hyperlink = worksheet.HyperLinks.Add(worksheet.Range["A13"]);
   hyperlink.Type = ExcelHyperLinkType.Url;
   hyperlink.Address = "[email protected]";
   hyperlink.ScreenTip = "Send Mail";
     
   //Merge column A and B from row 15 to 22
   worksheet.Range["A15:B15"].Merge();
   worksheet.Range["A16:B16"].Merge();
   worksheet.Range["A17:B17"].Merge();
   worksheet.Range["A18:B18"].Merge();
   worksheet.Range["A19:B19"].Merge();
   worksheet.Range["A20:B20"].Merge();
   worksheet.Range["A21:B21"].Merge();
   worksheet.Range["A22:B22"].Merge();
     
   //Enter details of products and prices
   worksheet.Range["A15"].Text = "  DESCRIPTION";
   worksheet.Range["C15"].Text = "QTY";
   worksheet.Range["D15"].Text = "UNIT PRICE";
   worksheet.Range["E15"].Text = "AMOUNT";
   worksheet.Range["A16"].Text = "Cabrales Cheese";
   worksheet.Range["A17"].Text = "Chocos";
   worksheet.Range["A18"].Text = "Pasta";
   worksheet.Range["A19"].Text = "Cereals";
   worksheet.Range["A20"].Text = "Ice Cream";
   worksheet.Range["C16"].Number = 3;
   worksheet.Range["C17"].Number = 2;
   worksheet.Range["C18"].Number = 1;
   worksheet.Range["C19"].Number = 4;
   worksheet.Range["C20"].Number = 3;
   worksheet.Range["D16"].Number = 21;
   worksheet.Range["D17"].Number = 54;
   worksheet.Range["D18"].Number = 10;
   worksheet.Range["D19"].Number = 20;
   worksheet.Range["D20"].Number = 30;
   worksheet.Range["D23"].Text = "Total";
     
   //Apply number format
   worksheet.Range["D16:E22"].NumberFormat = "$0.00";
   worksheet.Range["E23"].NumberFormat = "$0.00";
     
   //Apply incremental formula for column Amount by multiplying Qty and UnitPrice
   application.EnableIncrementalFormula = true;
   worksheet.Range["E16:E20"].Formula = "=C16*D16";
     
   //Formula for Sum the total
   worksheet.Range["E23"].Formula = "=SUM(E16:E22)";
     
   //Apply borders
   worksheet.Range["A16:E22"].CellStyle.Borders[ExcelBordersIndex.EdgeTop].LineStyle = ExcelLineStyle.Thin;
   worksheet.Range["A16:E22"].CellStyle.Borders[ExcelBordersIndex.EdgeBottom].LineStyle = ExcelLineStyle.Thin;
   worksheet.Range["A16:E22"].CellStyle.Borders[ExcelBordersIndex.EdgeTop].Color = ExcelKnownColors.Grey_25_percent;
   worksheet.Range["A16:E22"].CellStyle.Borders[ExcelBordersIndex.EdgeBottom].Color = ExcelKnownColors.Grey_25_percent;
   worksheet.Range["A23:E23"].CellStyle.Borders[ExcelBordersIndex.EdgeTop].LineStyle = ExcelLineStyle.Thin;
   worksheet.Range["A23:E23"].CellStyle.Borders[ExcelBordersIndex.EdgeBottom].LineStyle = ExcelLineStyle.Thin;
   worksheet.Range["A23:E23"].CellStyle.Borders[ExcelBordersIndex.EdgeTop].Color = ExcelKnownColors.Black;
   worksheet.Range["A23:E23"].CellStyle.Borders[ExcelBordersIndex.EdgeBottom].Color = ExcelKnownColors.Black;
     
   //Apply font setting for cells with product details
   worksheet.Range["A3:E23"].CellStyle.Font.FontName = "Arial";
   worksheet.Range["A3:E23"].CellStyle.Font.Size = 10;
   worksheet.Range["A15:E15"].CellStyle.Font.Color = ExcelKnownColors.White;
   worksheet.Range["A15:E15"].CellStyle.Font.Bold = true;
   worksheet.Range["D23:E23"].CellStyle.Font.Bold = true;
     
   //Apply cell color
   worksheet.Range["A15:E15"].CellStyle.Color = Color.FromArgb(42, 118, 189);
     
   //Apply alignment to cells with product details
   worksheet.Range["A15"].CellStyle.HorizontalAlignment = ExcelHAlign.HAlignLeft;
   worksheet.Range["C15:C22"].CellStyle.HorizontalAlignment = ExcelHAlign.HAlignCenter;
   worksheet.Range["D15:E15"].CellStyle.HorizontalAlignment = ExcelHAlign.HAlignCenter;
     
   //Apply row height and column width to look good
   worksheet.Range["A1"].ColumnWidth = 36;
   worksheet.Range["B1"].ColumnWidth = 11;
   worksheet.Range["C1"].ColumnWidth = 8;
   worksheet.Range["D1:E1"].ColumnWidth = 18;
   worksheet.Range["A1"].RowHeight = 47;
   worksheet.Range["A2"].RowHeight = 15;
   worksheet.Range["A3:A4"].RowHeight = 15;
   worksheet.Range["A5"].RowHeight = 18;
   worksheet.Range["A6"].RowHeight = 29;
   worksheet.Range["A7"].RowHeight = 18;
   worksheet.Range["A8"].RowHeight = 15;
   worksheet.Range["A9:A14"].RowHeight = 15;
   worksheet.Range["A15:A23"].RowHeight = 18;
     
   //Save the document as a stream and retrun the stream.
   using (MemoryStream stream = new MemoryStream())
   {
     //Save the created Excel document to MemoryStream
     workbook.SaveAs(stream);
     return stream;
   }
 }

Create a new class file in the project, with name as FileUtils and add the following code to invoke the JavaScript action for downloading the file in browser.

C#
public static class FileUtils
 {
     public static ValueTask<object> SaveAs(this IJSRuntime js, string filename, byte[] data)
         => js.InvokeAsync<object>(
            "saveAsFile",
            filename,
            Convert.ToBase64String(data));
 }

Add the following JavaScript function in the App.razor.

C#
<script type="text/javascript">
   function saveAsFile(filename, bytesBase64) {
   
   if (navigator.msSaveBlob) 
   {
     //Download document in Edge browser
     var data = window.atob(bytesBase64);
     var bytes = new Uint8Array(data.length);
     for (var i = 0; i < data.length; i++) 
     {
       bytes[i] = data.charCodeAt(i);
     }
     var blob = new Blob([bytes.buffer], { type: "application/octet-stream" });
     navigator.msSaveBlob(blob, filename);
   }
   else 
   {
     var link = document.createElement('a');
     link.download = filename;
     link.href = "data:application/octet-stream;base64," + bytesBase64;
     document.body.appendChild(link); // Needed for Firefox
     link.click();
     document.body.removeChild(link);
   }
 }
 </script>

Add the following code in NavMenu.razor file present under Layout folder.

C#
<div class="nav-item px-3">
    <NavLink class="nav-link" href="Excel">
        <span class="oi oi-list-rich" aria-hidden="true"></span> Create Excel
    </NavLink>
</div>

Add the service in the Program.cs file.

C#
builder.Services.AddScoped <Create_Excel.Components.Data.ExcelService>();

A complete working example of how to create an Excel file in Blazor Server-Side web application in C# is present on this GitHub page.

By executing the program, you will get the Excel file as below.
Output File

Read and Edit Excel file in Blazor Server-Side web application

The below code snippet illustrates how to read and edit an Excel file in Blazor Server-Side web application.

C#
//Create an instance of ExcelEngine
using (ExcelEngine excelEngine = new ExcelEngine())
{
  //Instantiate the Excel application object
  IApplication application = excelEngine.Excel;
  
  //Set the default application version
  application.DefaultVersion = ExcelVersion.Xlsx;
  
  //Load the existing Excel workbook into IWorkbook
  FileStream inputStream = new FileStream("Sample.xlsx", FileMode.Open);
  IWorkbook workbook = application.Workbooks.Open(inputStream);
  
  //Get the first worksheet in the workbook into IWorksheet
  IWorksheet worksheet = workbook.Worksheets[0];
  
  //Assign some text in a cell
  worksheet.Range["A3"].Text = "Hello World";
  
  //Access a cell value from Excel
  var value = worksheet.Range["A1"].Value;
  
  //Save the document as a stream and retrun the stream.
  using (MemoryStream stream = new MemoryStream())
  {
    //Save the created Excel document to MemoryStream.
    workbook.SaveAs(stream);
  
    return stream;
  }
}

A complete working example of how to read and edit an Excel file in Blazor Server-Side web application in C# is present on this GitHub page.