如何用 C# 寫 CSV 檔案

using IronXL; 
using System.Linq;

// This is the main class where execution starts.
public class Program {
    static void Main() {
        // Main method where all logic is executed
    }
}

Imports IronXL
Imports System.Linq

' This is the main class where execution starts.
Public Class Program
	Shared Sub Main()
		' Main method where all logic is executed
	End Sub
End Class

// Create a new workbook. This serves as the container for all worksheets.
WorkBook workBook = WorkBook.Create();

// Create a new worksheet within the workbook named "Receipt".
WorkSheet workSheet = workBook.CreateWorkSheet("Receipt");

' Create a new workbook. This serves as the container for all worksheets.
Dim workBook As WorkBook = WorkBook.Create()

' Create a new worksheet within the workbook named "Receipt".
Dim workSheet As WorkSheet = workBook.CreateWorkSheet("Receipt")

// Set the header row for columns. Headers added for better understanding of data.
workSheet["A1"].Value = "Product"; 
workSheet["B1"].Value = "Price";

' Set the header row for columns. Headers added for better understanding of data.
workSheet("A1").Value = "Product"
workSheet("B1").Value = "Price"

// Populate worksheet with product data and their respective prices.
workSheet["A2"].Value = "Item 1"; 
workSheet["B2"].DoubleValue = 20.10; 

workSheet["A3"].Value = "Item 2"; 
workSheet["B3"].DoubleValue = 15.50; 

workSheet["A4"].Value = "Item 3"; 
workSheet["B4"].DoubleValue = 10.25;

' Populate worksheet with product data and their respective prices.
workSheet("A2").Value = "Item 1"
workSheet("B2").DoubleValue = 20.10

workSheet("A3").Value = "Item 2"
workSheet("B3").DoubleValue = 15.50

workSheet("A4").Value = "Item 3"
workSheet("B4").DoubleValue = 10.25

// Define the range for price values to be summed.
var range = workSheet["B2:B4"];

// Calculate the sum of prices.
decimal sum = range.Sum();

' Define the range for price values to be summed.
Dim range = workSheet("B2:B4")

' Calculate the sum of prices.
Dim sum As Decimal = range.Sum()

// Display the sum in the console.
System.Console.WriteLine(sum);

// Update the total price in the worksheet.
workSheet["B5"].Value = sum;

' Display the sum in the console.
System.Console.WriteLine(sum)

' Update the total price in the worksheet.
workSheet("B5").Value = sum

// Save the workbook as a CSV file named "receipt.csv".
workBook.SaveAs("receipt.csv");

' Save the workbook as a CSV file named "receipt.csv".
workBook.SaveAs("receipt.csv")

using IronXL;
using System.Linq;

public class Program
{
    static void Main()
    {
        // Create a new workbook and worksheet
        WorkBook workBook = WorkBook.Create();
        WorkSheet workSheet = workBook.CreateWorkSheet("Receipt");

        // Add headers with formatting
        workSheet["A1"].Value = "Product";
        workSheet["B1"].Value = "Price";

        // Style the header row
        workSheet["A1:B1"].Style.Font.Bold = true;
        workSheet["A1:B1"].Style.FillPattern = IronXL.Styles.FillPattern.Solid;
        workSheet["A1:B1"].Style.BackgroundColor = "#CCCCCC";

        // Add product data
        workSheet["A2"].Value = "Item 1";
        workSheet["B2"].DoubleValue = 20.10;

        workSheet["A3"].Value = "Item 2";
        workSheet["B3"].DoubleValue = 15.50;

        workSheet["A4"].Value = "Item 3";
        workSheet["B4"].DoubleValue = 10.25;

        // Calculate and add total
        var priceRange = workSheet["B2:B4"];
        decimal total = priceRange.Sum();

        workSheet["A5"].Value = "Total";
        workSheet["B5"].Value = total;
        workSheet["A5:B5"].Style.Font.Bold = true;

        // Apply number formatting to prices
        workSheet["B2:B5"].FormatString = "$#,##0.00";

        // Save as CSV file
        workBook.SaveAs("receipt.csv");

        Console.WriteLine($"Receipt saved successfully. Total: ${total:F2}");
    }
}

Imports IronXL
Imports System.Linq

Public Class Program
    Shared Sub Main()
        ' Create a new workbook and worksheet
        Dim workBook As WorkBook = WorkBook.Create()
        Dim workSheet As WorkSheet = workBook.CreateWorkSheet("Receipt")

        ' Add headers with formatting
        workSheet("A1").Value = "Product"
        workSheet("B1").Value = "Price"

        ' Style the header row
        workSheet("A1:B1").Style.Font.Bold = True
        workSheet("A1:B1").Style.FillPattern = IronXL.Styles.FillPattern.Solid
        workSheet("A1:B1").Style.BackgroundColor = "#CCCCCC"

        ' Add product data
        workSheet("A2").Value = "Item 1"
        workSheet("B2").DoubleValue = 20.1

        workSheet("A3").Value = "Item 2"
        workSheet("B3").DoubleValue = 15.5

        workSheet("A4").Value = "Item 3"
        workSheet("B4").DoubleValue = 10.25

        ' Calculate and add total
        Dim priceRange = workSheet("B2:B4")
        Dim total As Decimal = priceRange.Sum()

        workSheet("A5").Value = "Total"
        workSheet("B5").Value = total
        workSheet("A5:B5").Style.Font.Bold = True

        ' Apply number formatting to prices
        workSheet("B2:B5").FormatString = "$#,##0.00"

        ' Save as CSV file
        workBook.SaveAs("receipt.csv")

        Console.WriteLine($"Receipt saved successfully. Total: ${total:F2}")
    End Sub
End Class