How to Use C# to Convert Datatable to CSV

using IronXL;

Imports IronXL

using IronXL;
using System;
using System.Data;

// Create a new DataTable object
DataTable table = new DataTable();

// Add a single column named "Example_DataSet" of type string
table.Columns.Add("Example_DataSet", typeof(string));

// Add rows to the DataTable
table.Rows.Add("0");
table.Rows.Add("1");
table.Rows.Add("2");
table.Rows.Add("3");
table.Rows.Add("1");
table.Rows.Add("2");
table.Rows.Add("3");

// Create a new Excel workbook and set its author metadata
WorkBook wb = WorkBook.Create(ExcelFileFormat.XLS);
wb.Metadata.Author = "OJ";

// Get the default worksheet
WorkSheet ws = wb.DefaultWorkSheet;

// Initialize rowCounter for Excel sheet rows
int rowCount = 1;

// Loop through each row in the DataTable and add the data to the Excel worksheet
foreach (DataRow row in table.Rows)
{
    // Populate worksheet cells with data from DataTable
    ws["A" + (rowCount)].Value = row[0].ToString();
    rowCount++;
}

// Save the workbook as a CSV file
wb.SaveAsCsv("Save_DataTable_CSV.csv", ";"); // Will be saved as: Save_DataTable_CSV.Sheet1.csv

Imports IronXL
Imports System
Imports System.Data

' Create a new DataTable object
Dim table As New DataTable()

' Add a single column named "Example_DataSet" of type string
table.Columns.Add("Example_DataSet", GetType(String))

' Add rows to the DataTable
table.Rows.Add("0")
table.Rows.Add("1")
table.Rows.Add("2")
table.Rows.Add("3")
table.Rows.Add("1")
table.Rows.Add("2")
table.Rows.Add("3")

' Create a new Excel workbook and set its author metadata
Dim wb As WorkBook = WorkBook.Create(ExcelFileFormat.XLS)
wb.Metadata.Author = "OJ"

' Get the default worksheet
Dim ws As WorkSheet = wb.DefaultWorkSheet

' Initialize rowCounter for Excel sheet rows
Dim rowCount As Integer = 1

' Loop through each row in the DataTable and add the data to the Excel worksheet
For Each row As DataRow In table.Rows
    ' Populate worksheet cells with data from DataTable
    ws("A" & rowCount).Value = row(0).ToString()
    rowCount += 1
Next

' Save the workbook as a CSV file
wb.SaveAsCsv("Save_DataTable_CSV.csv", ";") ' Will be saved as: Save_DataTable_CSV.Sheet1.csv

// Create a DataTable with multiple columns
DataTable advancedTable = new DataTable();
advancedTable.Columns.Add("ID", typeof(int));
advancedTable.Columns.Add("Name", typeof(string));
advancedTable.Columns.Add("Price", typeof(decimal));

--snip--
wまたはkbook.SaveAsCsv("products.csv", ",");

' Create a DataTable with multiple columns
Dim advancedTable As New DataTable()
advancedTable.Columns.Add("ID", GetType(Integer))
advancedTable.Columns.Add("Name", GetType(String))
advancedTable.Columns.Add("Price", GetType(Decimal))

' --snip--
wまたはkbook.SaveAsCsv("products.csv", ",")