Comment créer un fichier CSV en C# (Tutoriel étape par étape)

2.1. Using the Visual Studio NuGet Package Manager

The NuGet Package Manager option is available in the Visual Studio software to install the package directly into the solution. The below screenshot shows how to open it.

NuGet Package Manager

The NuGet Package Manager feature provides an area where users can browse and search for packages that are offered on the NuGet website. Enter "IronXL" in the search field to find the IronXL library.

NuGet Package Manager

From the linked packages from the search in the image up above, select the IronXL option and install the package to the solution.

2.2. Using the Visual Studio Command-Line

In the Visual Studio menu go to Tools, move the cursor to NuGet Package Manager and click on Package Manager Console.

Visual Studio Commandline

Package Manager Console will appear at the bottom of the screen. Just write the following code command and press enter, IronXL will install an instance.

Install-Package IronXL.Excel

3.1. Create CSV from an XLSX file

For creating a CSV file, the Excel file should contain some example data.

Sample Excel File

Enter the code given below in the opened program.cs file and run the project.

using IronXL;

class Program
{
    static void Main()
    {
        // Load an existing Excel file
        WorkBook wb = WorkBook.Load("test.xlsx");

        // Save the loaded workbook as a CSV file
        wb.SaveAsCsv("Parsed CSV.csv");
    }
}

using IronXL;

class Program
{
    static void Main()
    {
        // Load an existing Excel file
        WorkBook wb = WorkBook.Load("test.xlsx");

        // Save the loaded workbook as a CSV file
        wb.SaveAsCsv("Parsed CSV.csv");
    }
}

Imports IronXL

Friend Class Program
	Shared Sub Main()
		' Load an existing Excel file
		Dim wb As WorkBook = WorkBook.Load("test.xlsx")

		' Save the loaded workbook as a CSV file
		wb.SaveAsCsv("Parsed CSV.csv")
	End Sub
End Class

After execution is completed, a new file named Parsed CSV.csv file will be created. Open the file using your preferred Spreadsheet application.

CSV Data

3.2. Create new CSV Workbook Programmatically

This example code shows how to create a CSV file from scratch using IronXL.

using IronXL;

class Program
{
    static void Main()
    {
        // Create a new workbook in XLSX format
        WorkBook xlsWorkbook = WorkBook.Create(ExcelFileFormat.XLSX);

        // Set metadata for the workbook
        xlsWorkbook.Metadata.Author = "IronXL";

        // Create a new worksheet in the workbook
        WorkSheet xlsSheet = xlsWorkbook.CreateWorkSheet("new_sheet");

        // Add data to cells in the worksheet
        xlsSheet["A1"].Value = "Hello";
        xlsSheet["B1"].Value = "World";
        xlsSheet["A2"].Value = "New CSV example output";
        xlsSheet["B2"].Value = "From Scratch";

        // Save the workbook as a CSV file
        xlsWorkbook.SaveAsCsv("NewCSVFile.csv");
    }
}

using IronXL;

class Program
{
    static void Main()
    {
        // Create a new workbook in XLSX format
        WorkBook xlsWorkbook = WorkBook.Create(ExcelFileFormat.XLSX);

        // Set metadata for the workbook
        xlsWorkbook.Metadata.Author = "IronXL";

        // Create a new worksheet in the workbook
        WorkSheet xlsSheet = xlsWorkbook.CreateWorkSheet("new_sheet");

        // Add data to cells in the worksheet
        xlsSheet["A1"].Value = "Hello";
        xlsSheet["B1"].Value = "World";
        xlsSheet["A2"].Value = "New CSV example output";
        xlsSheet["B2"].Value = "From Scratch";

        // Save the workbook as a CSV file
        xlsWorkbook.SaveAsCsv("NewCSVFile.csv");
    }
}

Imports IronXL

Friend Class Program
	Shared Sub Main()
		' Create a new workbook in XLSX format
		Dim xlsWorkbook As WorkBook = WorkBook.Create(ExcelFileFormat.XLSX)

		' Set metadata for the workbook
		xlsWorkbook.Metadata.Author = "IronXL"

		' Create a new worksheet in the workbook
		Dim xlsSheet As WorkSheet = xlsWorkbook.CreateWorkSheet("new_sheet")

		' Add data to cells in the worksheet
		xlsSheet("A1").Value = "Hello"
		xlsSheet("B1").Value = "World"
		xlsSheet("A2").Value = "New CSV example output"
		xlsSheet("B2").Value = "From Scratch"

		' Save the workbook as a CSV file
		xlsWorkbook.SaveAsCsv("NewCSVFile.csv")
	End Sub
End Class

The sample code above first creates a new Workbook and then populates the rows and columns of the WorkBook with data. Afterward, it saves the file using the SaveAsCsv method.

CSV File Output