IronXLを使用して C# で Excel データをインポートする方法

Install-Package IronXL
dotnet add package IronXL

using IronXL;

// Load any Excel file
WorkBook workBook = WorkBook.Load("ProductData.xlsx");
// Access the first worksheet
WorkSheet sheet = workBook.WorkSheets[0];
// Read a cell value
string value = sheet["B1"].StringValue;
Console.WriteLine(value);

Imports IronXL

' Load any Excel file
Dim workBook As WorkBook = WorkBook.Load("ProductData.xlsx")
' Access the first worksheet
Dim sheet As WorkSheet = workBook.WorkSheets(0)
' Read a cell value
Dim value As String = sheet("B1").StringValue
Console.WriteLine(value)

using IronXL;

// Load the Excel file
WorkBook workBook = WorkBook.Load("ProductData.xlsx");
WorkSheet sheet = workBook.DefaultWorkSheet;

// Map rows to typed objects
var products = new List<Product>();
foreach (var row in sheet.Rows)
{
    var product = new Product
    {
        Id = row.Columns[0].IntValue,
        Name = row.Columns[1].StringValue,
        Price = row.Columns[2].DecimalValue,
        IsAvailable = row.Columns[3].BoolValue
    };
    products.Add(product);
}

foreach (var product in products)
{
    Console.WriteLine(
        $"Id: {product.Id}, Name: {product.Name}, " +
        $"Price: {product.Price}, Available: {product.IsAvailable}"
    );
}

Imports IronXL

' Load the Excel file
Dim workBook As WorkBook = WorkBook.Load("ProductData.xlsx")
Dim sheet As WorkSheet = workBook.DefaultWorkSheet

' Map rows to typed objects
Dim products As New List(Of Product)()
For Each row In sheet.Rows
    Dim product As New Product With {
        .Id = row.Columns(0).IntValue,
        .Name = row.Columns(1).StringValue,
        .Price = row.Columns(2).DecimalValue,
        .IsAvailable = row.Columns(3).BoolValue
    }
    products.Add(product)
Next

For Each product In products
    Console.WriteLine(
        $"Id: {product.Id}, Name: {product.Name}, " &
        $"Price: {product.Price}, Available: {product.IsAvailable}"
    )
Next

using IronXL;
using System.Data;
using System.Data.SqlClient;

// Load Excel file
WorkBook workBook = WorkBook.Load("inventory.xlsx");
// Select the first worksheet
WorkSheet sheet = workBook.WorkSheets.First();

// Convert to DataTable -- first row becomes column headers
DataTable dataTable = sheet.ToDataTable(true);

// Use SqlBulkCopy to insert directly into SQL Server
string connectionString = "Data Source=.;Initial Catalog=InventoryDB;Integrated Security=True;";
using (SqlBulkCopy bulkCopy = new SqlBulkCopy(connectionString))
{
    bulkCopy.DestinationTableName = "Inventory";
    bulkCopy.WriteToServer(dataTable);
}

Imports IronXL
Imports System.Data
Imports System.Data.SqlClient

' Load Excel file
Dim workBook As WorkBook = WorkBook.Load("inventory.xlsx")
' Select the first worksheet
Dim sheet As WorkSheet = workBook.WorkSheets.First()

' Convert to DataTable -- first row becomes column headers
Dim dataTable As DataTable = sheet.ToDataTable(True)

' Use SqlBulkCopy to insert directly into SQL Server
Dim connectionString As String = "Data Source=.;Initial Catalog=InventoryDB;Integrated Security=True;"
Using bulkCopy As New SqlBulkCopy(connectionString)
    bulkCopy.DestinationTableName = "Inventory"
    bulkCopy.WriteToServer(dataTable)
End Using

using IronXL;
using System.Data;

WorkBook workBook = WorkBook.Load("inventory.xlsx");
WorkSheet sheet = workBook.WorkSheets.First();

// Build DataTable manually for custom column types or validation
DataTable customTable = new DataTable();

for (int col = 0; col < sheet.ColumnCount; col++)
{
    customTable.Columns.Add($"Column{col + 1}", typeof(string));
}

foreach (var row in sheet.Rows)
{
    var dataRow = customTable.NewRow();
    for (int col = 0; col < sheet.ColumnCount; col++)
    {
        dataRow[col] = row.Columns[col].Value ?? DBNull.Value;
    }
    customTable.Rows.Add(dataRow);
}

// Print headers
foreach (DataColumn column in customTable.Columns)
{
    Console.Write($"{column.ColumnName}\t");
}
Console.WriteLine();

// Print data rows
foreach (DataRow row in customTable.Rows)
{
    foreach (var item in row.ItemArray)
    {
        Console.Write($"{item}\t");
    }
    Console.WriteLine();
}

Imports IronXL
Imports System.Data

Dim workBook As WorkBook = WorkBook.Load("inventory.xlsx")
Dim sheet As WorkSheet = workBook.WorkSheets.First()

' Build DataTable manually for custom column types or validation
Dim customTable As New DataTable()

For col As Integer = 0 To sheet.ColumnCount - 1
    customTable.Columns.Add($"Column{col + 1}", GetType(String))
Next

For Each row In sheet.Rows
    Dim dataRow = customTable.NewRow()
    For col As Integer = 0 To sheet.ColumnCount - 1
        dataRow(col) = If(row.Columns(col).Value, DBNull.Value)
    Next
    customTable.Rows.Add(dataRow)
Next

' Print headers
For Each column As DataColumn In customTable.Columns
    Console.Write($"{column.ColumnName}" & vbTab)
Next
Console.WriteLine()

' Print data rows
For Each row As DataRow In customTable.Rows
    For Each item In row.ItemArray
        Console.Write($"{item}" & vbTab)
    Next
    Console.WriteLine()
Next

using IronXL;

WorkBook workBook = WorkBook.Load("StyledReport.xlsx");
WorkSheet sheet = workBook.DefaultWorkSheet;

foreach (var row in sheet.Rows)
{
    var firstCell = row.Columns[0];

    // Skip rows where the first cell is bold (typically header or total rows)
    if (firstCell.Style.Font.Bold)
    {
        continue;
    }

    Console.WriteLine($"Data row: {firstCell.StringValue}");
}

Imports IronXL

Dim workBook As WorkBook = WorkBook.Load("StyledReport.xlsx")
Dim sheet As WorkSheet = workBook.DefaultWorkSheet

For Each row In sheet.Rows
    Dim firstCell = row.Columns(0)

    ' Skip rows where the first cell is bold (typically header or total rows)
    If firstCell.Style.Font.Bold Then
        Continue For
    End If

    Console.WriteLine($"Data row: {firstCell.StringValue}")
Next