使用 C# 與 IronXL 在 ASP.NET MVC 中讀取 Excel 檔案

using IronXL;
using System.Data;

public ActionResult Index()
{
    // Load the Excel workbook from a specified path.
    WorkBook workBook = WorkBook.Load(@"C:\Files\Customer Data.xlsx");

    // Access the first worksheet from the workbook.
    WorkSheet workSheet = workBook.WorkSheets.First();

    // Convert the worksheet data to a DataTable object.
    // The 'true' parameter uses the first row as column headers
    var dataTable = workSheet.ToDataTable(true);

    // Send the DataTable to the view for rendering.
    return View(dataTable);
}

Imports IronXL
Imports System.Data

Public Function Index() As ActionResult
    ' Load the Excel workbook from a specified path.
    Dim workBook As WorkBook = WorkBook.Load("C:\Files\Customer Data.xlsx")

    ' Access the first worksheet from the workbook.
    Dim workSheet As WorkSheet = workBook.WorkSheets.First()

    ' Convert the worksheet data to a DataTable object.
    ' The 'true' parameter uses the first row as column headers
    Dim dataTable = workSheet.ToDataTable(True)

    ' Send the DataTable to the view for rendering.
    Return View(dataTable)
End Function

public ActionResult Index()
{
    try
    {
        string filePath = @"C:\Files\Customer Data.xlsx";

        // Check if file exists before attempting to load
        if (!System.IO.File.Exists(filePath))
        {
            ViewBag.Error = "Excel file not found at specified location.";
            return View(new DataTable());
        }

        // Load workbook with error handling
        WorkBook workBook = WorkBook.Load(filePath);

        // Verify worksheet exists
        if (workBook.WorkSheets.Count == 0)
        {
            ViewBag.Error = "No worksheets found in the Excel file.";
            return View(new DataTable());
        }

        WorkSheet workSheet = workBook.WorkSheets.First();
        var dataTable = workSheet.ToDataTable(true);

        return View(dataTable);
    }
    catch (Exception ex)
    {
        // Log the exception (consider using a logging framework)
        ViewBag.Error = $"Error reading Excel file: {ex.Message}";
        return View(new DataTable());
    }
}

Imports System.IO
Imports System.Data

Public Function Index() As ActionResult
    Try
        Dim filePath As String = "C:\Files\Customer Data.xlsx"

        ' Check if file exists before attempting to load
        If Not File.Exists(filePath) Then
            ViewBag.Error = "Excel file not found at specified location."
            Return View(New DataTable())
        End If

        ' Load workbook with error handling
        Dim workBook As WorkBook = WorkBook.Load(filePath)

        ' Verify worksheet exists
        If workBook.WorkSheets.Count = 0 Then
            ViewBag.Error = "No worksheets found in the Excel file."
            Return View(New DataTable())
        End If

        Dim workSheet As WorkSheet = workBook.WorkSheets.First()
        Dim dataTable = workSheet.ToDataTable(True)

        Return View(dataTable)
    Catch ex As Exception
        ' Log the exception (consider using a logging framework)
        ViewBag.Error = $"Error reading Excel file: {ex.Message}"
        Return View(New DataTable())
    End Try
End Function

// Method 1: Select by worksheet name
WorkSheet namedSheet = workBook.GetWorkSheet("Sales Data");

// Method 2: Select by index (zero-based)
WorkSheet secondSheet = workBook.WorkSheets[1];

// Method 3: Select the default/active worksheet
WorkSheet defaultSheet = workBook.DefaultWorkSheet;

// Method 4: Iterate through all worksheets
foreach (WorkSheet sheet in workBook.WorkSheets)
{
    string sheetName = sheet.Name;
    // Process each worksheet
}

' Method 1: Select by worksheet name
Dim namedSheet As WorkSheet = workBook.GetWorkSheet("Sales Data")

' Method 2: Select by index (zero-based)
Dim secondSheet As WorkSheet = workBook.WorkSheets(1)

' Method 3: Select the default/active worksheet
Dim defaultSheet As WorkSheet = workBook.DefaultWorkSheet

' Method 4: Iterate through all worksheets
For Each sheet As WorkSheet In workBook.WorkSheets
    Dim sheetName As String = sheet.Name
    ' Process each worksheet
Next

@{
    ViewData["Title"] = "Home Page";
}

@using System.Data
@model DataTable

<div class="text-center">
    <h1 class="display-4">Welcome to IronXL Read Excel MVC</h1>
</div>

@* Check for errors first *@
@if (ViewBag.Error != null)
{
    <div class="alert alert-danger">
        @ViewBag.Error
    </div>
}

@* Display table only if data exists *@
@if (Model != null && Model.Rows.Count > 0)
{
    <table class="table table-dark">
        <tbody>
            @foreach (DataRow row in Model.Rows)
            {
                <tr>
                    @for (int i = 0; i < Model.Columns.Count; i++)
                    {
                        <td>@row[i]</td>
                    }
                </tr>
            }
        </tbody>
    </table>
}
else
{
    <p>No data to display.</p>
}

@if (Model != null && Model.Rows.Count > 0)
{
    <table class="table table-dark">
        <thead>
            <tr>
                @foreach (DataColumn column in Model.Columns)
                {
                    <th>@column.ColumnName</th>
                }
            </tr>
        </thead>
        <tbody>
            @foreach (DataRow row in Model.Rows)
            {
                <tr>
                    @for (int i = 0; i < Model.Columns.Count; i++)
                    {
                        <td>@row[i]</td>
                    }
                </tr>
            }
        </tbody>
    </table>
}