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Create spreadsheet from existing template in C#, VB.NET

Syncfusion Excel (XlsIO) library is a .NET Excel library used to create, read, and edit Excel documents. Also, converts Excel documents to PDF files. Using this library, you can create spreadsheet from existing template in C#, VB.NET.

You can create spreadsheet from existing template by using the ‘Workbooks.Open’ method. A template is a workbook whose formatting will be inherited by the new workbook created. The template may be designed either through the code or through the Microsoft Excel designer. It is even easier to create the template using the Microsoft Excel designer.

Steps to create spreadsheet from existing template, programmatically:

Step 1: Create a new C# console application project.

Create new console application project

Create a new C# console application

Step 2: Install the Syncfusion.XlsIO.WinForms NuGet package as reference to your .NET Framework application from NuGet.org.

Install NuGet package

Install NuGet package

Step 3: Include the following namespaces in the Program.cs file.


using Syncfusion.XlsIO;
using System.IO;
using System.Reflection;



Imports Syncfusion.XlsIO
Imports System.IO
Imports System.Reflection


Step 4: Use the following code snippet to create spreadsheet from existing template in C#, VB.NET.


//Create Excel engine
using (ExcelEngine excelEngine = new ExcelEngine())
    //Instantiate the application object
    IApplication application = excelEngine.Excel;
    //Create spreadsheet from existing template
    IWorkbook workbook = application.Workbooks.Open("Template.xlsx");
    //The first worksheet object in the worksheets collection is accessed
    IWorksheet worksheet = workbook.Worksheets[0];
    //A text is set in the first cell of the worksheet
    worksheet[1, 1].Text = "Syncfusion Essential Studio";
    //Save the spreadsheet



'Create Excel engine
Using excelEngine As ExcelEngine = New ExcelEngine()
    'Instantiate the application object
    Dim application As IApplication = excelEngine.Excel
    'Create spreadsheet from existing template
    Dim workbook As IWorkbook = application.Workbooks.Open("Template.xlsx")
    'The first worksheet object in the worksheets collection is accessed
    Dim worksheet As IWorksheet = workbook.Worksheets(0)
    'A text is set in the first cell of the worksheet
    worksheet(1, 1).Text = "Syncfusion Essential Studio"
    'Save the spreadsheet
End Using


A complete Windows Forms working example of how to create spreadsheet from existing template in C#, VB.NET can be downloaded from create-spreadsheet-from-existing-template.zip.

By executing the program, you will get the output as below.

Output Excel document

Output Excel document

Refer here to explore the rich set of Syncfusion Excel (XlsIO) library features.

See Also:

Create simple spreadsheet in C#, VB.NET using XlsIO

Does the XlsIO component support Excel spreadsheets that have VBA code in them?

 How to create an Excel file in Windows Forms

How do I protect certain cells in a spreadsheet?

How do I create a workbook with the specified number of worksheets?

How to edit an existing Excel file in C#, VB.NET

Read Excel file in C#, VB.NET


Starting with v16.2.0.x, if you reference Syncfusion assemblies from trial setup or from the NuGet feed, include a license key in your projects. Refer the link to learn about generating and registering Syncfusion license key in your application to use the components without trail message.


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Alina Riva
Jan 10, 2020

ZetExcel is an excellent excel SDK for.Net framework. This is very useful for developing high-performance applications to create, edit, convert or print excel spreadsheet file formats without requiring Microsoft. I have used this Excel Spreadsheet Programming API from (https://zetexcel.com/). you can try.


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