EPPlus 讀取 Excel 到 DataTable C#（IronXL 教程）

using OfficeOpenXml;
using System;
using System.Data;
using System.IO;

class Program
{
    static void Main(string[] args)
    {
        var path = @"sample.xlsx"; // Specify the path to your Excel file
        var data = ExcelDataToDataTable(path, "Table");

        // Iterate through each row in the DataTable and print its contents
        foreach (DataRow row in data.Rows)
        {
            foreach (var wsrow in row.ItemArray)
            {
                Console.Write(wsrow + " ");
            }
            Console.WriteLine();
        }
    }

    /// <summary>
    /// Converts Excel sheet data to a DataTable.
    /// </summary>
    /// <param name="filePath">The path to the Excel file.</param>
    /// <param name="sheetName">The name of the worksheet to read from.</param>
    /// <param name="hasHeader">Indicates whether the Excel sheet has a header row.</param>
    /// <returns>DataTable containing Excel data.</returns>
    public static DataTable ExcelDataToDataTable(string filePath, string sheetName, bool hasHeader = true)
    {
        DataTable dt = new DataTable();
        var fi = new FileInfo(filePath);

        // Check if the file exists
        if (!fi.Exists)
            throw new Exception("File " + filePath + " does not exist.");

        // Set the license context for EPPlus
        ExcelPackage.LicenseContext = LicenseContext.NonCommercial;

        // Load the Excel file into an EPPlus ExcelPackage
        using (var xlPackage = new ExcelPackage(fi))
        {
            // Get the specified worksheet from the workbook
            var worksheet = xlPackage.Workbook.Worksheets[sheetName];

            // Convert the worksheet to a DataTable, optionally using the first row as column names
            dt = worksheet.Cells[1, 1, worksheet.Dimension.End.Row, worksheet.Dimension.End.Column].ToDataTable(c =>
            {
                c.FirstRowIsColumnNames = hasHeader;
            });
        }

        return dt;
    }
}

Imports OfficeOpenXml
Imports System
Imports System.Data
Imports System.IO

Friend Class Program
	Shared Sub Main(ByVal args() As String)
		Dim path = "sample.xlsx" ' Specify the path to your Excel file
		Dim data = ExcelDataToDataTable(path, "Table")

		' Iterate through each row in the DataTable and print its contents
		For Each row As DataRow In data.Rows
			For Each wsrow In row.ItemArray
				Console.Write(wsrow & " ")
			Next wsrow
			Console.WriteLine()
		Next row
	End Sub

	''' <summary>
	''' Converts Excel sheet data to a DataTable.
	''' </summary>
	''' <param name="filePath">The path to the Excel file.</param>
	''' <param name="sheetName">The name of the worksheet to read from.</param>
	''' <param name="hasHeader">Indicates whether the Excel sheet has a header row.</param>
	''' <returns>DataTable containing Excel data.</returns>
	Public Shared Function ExcelDataToDataTable(ByVal filePath As String, ByVal sheetName As String, Optional ByVal hasHeader As Boolean = True) As DataTable
		Dim dt As New DataTable()
		Dim fi = New FileInfo(filePath)

		' Check if the file exists
		If Not fi.Exists Then
			Throw New Exception("File " & filePath & " does not exist.")
		End If

		' Set the license context for EPPlus
		ExcelPackage.LicenseContext = LicenseContext.NonCommercial

		' Load the Excel file into an EPPlus ExcelPackage
		Using xlPackage = New ExcelPackage(fi)
			' Get the specified worksheet from the workbook
			Dim worksheet = xlPackage.Workbook.Worksheets(sheetName)

			' Convert the worksheet to a DataTable, optionally using the first row as column names
			dt = worksheet.Cells(1, 1, worksheet.Dimension.End.Row, worksheet.Dimension.End.Column).ToDataTable(Sub(c)
				c.FirstRowIsColumnNames = hasHeader
			End Sub)
		End Using

		Return dt
	End Function
End Class

using IronXL;
using System;
using System.Data;

class Program
{
    static void Main(string[] args)
    {
        // Load the Excel file into an IronXL WorkBook
        WorkBook workBook = WorkBook.Load("sample.xlsx");

        // Get the default worksheet from the workbook
        WorkSheet workSheet = workBook.DefaultWorkSheet;

        // Convert the worksheet to a DataTable, specifying that the first row contains column names
        DataTable table = workSheet.ToDataTable(true);

        // Iterate through each row in the DataTable and print its contents
        foreach (DataRow row in table.Rows)
        {
            foreach (var cell in row.ItemArray)
            {
                Console.Write(cell + " ");
            }
            Console.WriteLine();
        }
    }
}

Imports IronXL
Imports System
Imports System.Data

Friend Class Program
	Shared Sub Main(ByVal args() As String)
		' Load the Excel file into an IronXL WorkBook
		Dim workBook As WorkBook = WorkBook.Load("sample.xlsx")

		' Get the default worksheet from the workbook
		Dim workSheet As WorkSheet = workBook.DefaultWorkSheet

		' Convert the worksheet to a DataTable, specifying that the first row contains column names
		Dim table As DataTable = workSheet.ToDataTable(True)

		' Iterate through each row in the DataTable and print its contents
		For Each row As DataRow In table.Rows
			For Each cell In row.ItemArray
				Console.Write(cell & " ")
			Next cell
			Console.WriteLine()
		Next row
	End Sub
End Class