IronXL 與 NPOI 的比較

NPOI 安裝

使用 NuGet 安裝 NPOI

要透過 NuGet 安裝 NPOI，請打開 Visual Studio 開發人員命令提示符並輸入以下內容：

Install-Package NPOI -Version x.x.x

**圖 1** - NuGet NPOI 安裝

Visual Studio NuGet Package Manager 和 NPOI

使用以下步驟通過 Visual Studio 中的 NuGet Package Manager 安裝 IronXL 或 NPOI：

• 在 Solution Explorer 中右鍵單擊專案
• 選擇管理 NuGet 套件
• 搜尋您的套件
• 點擊安裝

**圖 2** - NuGet Package Manager 用於 NPOI

IronXL 安裝

下載 IronXL

To download IronXL, navigate to the following URL and click the "Download" button.

**圖 3** - 下載 IronXL

使用 NuGet 安裝 IronXL

要通過 NuGet 安裝 IronXL，請打開 Visual Studio 開發人員命令提示符並輸入以下命令：

Install-Package IronXl.Excel -Version x.x.x

**圖 4** - NuGet IronXL 安裝

Visual Studio NuGet Package Manager 和 IronXL

使用以下步驟透過 Visual Studio 中的 NuGet Package Manager 安裝 IronXL：

• 在 Solution Explorer 中右鍵單擊專案
• 選擇管理 NuGet 套件
• 搜尋您的套件
• 點擊安裝

**圖 5** - NuGet Package Manager 用於 IronXL

使用 NPOI 讀取 Excel 文件

以下程式碼展示了如何使用 NPOI 讀取 Excel 文件並顯示其內容。 添加以下程式碼並包括必要的命名空間：

using NPOI.SS.UserModel;
using NPOI.XSSF.UserModel;
using System.Data;
using System.IO;
using System.Collections.Generic;

using NPOI.SS.UserModel;
using NPOI.XSSF.UserModel;
using System.Data;
using System.IO;
using System.Collections.Generic;

下面的程式碼讀取現有的 Excel 文件並將其顯示在數據網格視圖內。

public void ReadExcelNPOI()
{
    DataTable dtTable = new DataTable();
    List<string> lstRows = new List<string>();
    ISheet objWorksheet;
    string strPath = @"c:\temp\NPOI_Test.XLSX";

    // Use FileStream to open the Excel file
    using (var fStream = new FileStream(strPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
    {
        fStream.Position = 0;
        XSSFWorkbook objWorkbook = new XSSFWorkbook(fStream);
        objWorksheet = objWorkbook.GetSheetAt(0);
        IRow objHeader = objWorksheet.GetRow(0);
        int countCells = objHeader.LastCellNum;

        // Add columns to the DataTable based on the header row of Excel
        for (int j = 0; j < countCells; j++)
        {
            ICell objCell = objHeader.GetCell(j);
            if (objCell == null || string.IsNullOrWhiteSpace(objCell.ToString())) continue;
            {
                dtTable.Columns.Add(objCell.ToString());
            }
        }

        // Add rows to the DataTable, looping through each row and cell
        for (int i = (objWorksheet.FirstRowNum + 1); i <= objWorksheet.LastRowNum; i++)
        {
            IRow objRow = objWorksheet.GetRow(i);
            if (objRow == null || objRow.Cells.All(d => d.CellType == CellType.Blank)) continue;

            for (int j = objRow.FirstCellNum; j < countCells; j++)
            {
                ICell cell = objRow.GetCell(j);
                if (cell != null && !string.IsNullOrEmpty(cell.ToString()) && !string.IsNullOrWhiteSpace(cell.ToString()))
                {
                    lstRows.Add(cell.ToString());
                }
            }

            if (lstRows.Count > 0)
                dtTable.Rows.Add(lstRows.ToArray());

            lstRows.Clear();
        }
    }

    // Assuming dataGridView1 is a DataGridView control on a Form
    dataGridView1.DataSource = dtTable;
}

private void button1_Click(object sender, EventArgs e)
{
    ReadExcelNPOI();
}

public void ReadExcelNPOI()
{
    DataTable dtTable = new DataTable();
    List<string> lstRows = new List<string>();
    ISheet objWorksheet;
    string strPath = @"c:\temp\NPOI_Test.XLSX";

    // Use FileStream to open the Excel file
    using (var fStream = new FileStream(strPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
    {
        fStream.Position = 0;
        XSSFWorkbook objWorkbook = new XSSFWorkbook(fStream);
        objWorksheet = objWorkbook.GetSheetAt(0);
        IRow objHeader = objWorksheet.GetRow(0);
        int countCells = objHeader.LastCellNum;

        // Add columns to the DataTable based on the header row of Excel
        for (int j = 0; j < countCells; j++)
        {
            ICell objCell = objHeader.GetCell(j);
            if (objCell == null || string.IsNullOrWhiteSpace(objCell.ToString())) continue;
            {
                dtTable.Columns.Add(objCell.ToString());
            }
        }

        // Add rows to the DataTable, looping through each row and cell
        for (int i = (objWorksheet.FirstRowNum + 1); i <= objWorksheet.LastRowNum; i++)
        {
            IRow objRow = objWorksheet.GetRow(i);
            if (objRow == null || objRow.Cells.All(d => d.CellType == CellType.Blank)) continue;

            for (int j = objRow.FirstCellNum; j < countCells; j++)
            {
                ICell cell = objRow.GetCell(j);
                if (cell != null && !string.IsNullOrEmpty(cell.ToString()) && !string.IsNullOrWhiteSpace(cell.ToString()))
                {
                    lstRows.Add(cell.ToString());
                }
            }

            if (lstRows.Count > 0)
                dtTable.Rows.Add(lstRows.ToArray());

            lstRows.Clear();
        }
    }

    // Assuming dataGridView1 is a DataGridView control on a Form
    dataGridView1.DataSource = dtTable;
}

private void button1_Click(object sender, EventArgs e)
{
    ReadExcelNPOI();
}

使用 IronXL 讀取 Excel 文件

以下程式碼展示了如何使用 IronXL 讀取 Excel 文件並顯示在數據網格視圖內。 添加以下程式碼並包括命名空間：

using IronXL;
using System.Data;

using IronXL;
using System.Data;

注意包含 IronXL。 這是 IronXL 正常運行所需要的。 添加以下幾行：

private void button2_Click(object sender, EventArgs e)
{
    // Load the Excel workbook
    string strPath = @"c:\temp\NPOI_Test.XLSX";
    WorkBook workbook = WorkBook.Load(strPath);

    // Access the default worksheet
    WorkSheet sheet = workbook.DefaultWorkSheet;

    // Convert the worksheet to a DataTable
    var dtTable = sheet.ToDataTable(true);

    // Assuming dataGridView1 is a DataGridView control on a Form
    dataGridView1.DataSource = dtTable;
}

private void button2_Click(object sender, EventArgs e)
{
    // Load the Excel workbook
    string strPath = @"c:\temp\NPOI_Test.XLSX";
    WorkBook workbook = WorkBook.Load(strPath);

    // Access the default worksheet
    WorkSheet sheet = workbook.DefaultWorkSheet;

    // Convert the worksheet to a DataTable
    var dtTable = sheet.ToDataTable(true);

    // Assuming dataGridView1 is a DataGridView control on a Form
    dataGridView1.DataSource = dtTable;
}

如您所見，這樣做總共減少了很多工作量。