c# openxml 删除xlsx、xls的外链示例代码

using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Spreadsheet;
class Program
{
    static void Main()
    {
        string filePath = "your_file_path.xlsx";
        // 备份文件，以防需要还原
        string backupFilePath = "backup_file_path.xlsx";
        System.IO.File.Copy(filePath, backupFilePath, true);
        // 删除外部链接
        RemoveExternalLinks(filePath);
        Console.WriteLine("External links removed successfully.");
    }
    static void RemoveExternalLinks(string filePath)
    {
        using (SpreadsheetDocument spreadsheetDoc = SpreadsheetDocument.Open(filePath, true))
        {
            WorkbookPart workbookPart = spreadsheetDoc.WorkbookPart;
            // 删除 externalReferences 元素
            ExternalReferences externalReferences = workbookPart.Workbook.Descendants<ExternalReferences>().FirstOrDefault();
            if (externalReferences != null)
            {
                externalReferences.Remove();
            }
            // 保存更改
            workbookPart.Workbook.Save();
        }
    }
}

using NPOI.HSSF.UserModel;
using NPOI.SS.UserModel;
using System;
using System.IO;
class Program
{
    static void Main()
    {
        string filePath = "your_file_path.xls";
        // 备份文件，以防需要还原
        string backupFilePath = "backup_file_path.xls";
        File.Copy(filePath, backupFilePath, true);
        // 删除外部链接
        RemoveExternalLinks(filePath);
        Console.WriteLine("External links removed successfully.");
    }
    static void RemoveExternalLinks(string filePath)
    {
        using (FileStream fileStream = new FileStream(filePath, FileMode.Open, FileAccess.ReadWrite))
        {
            HSSFWorkbook workbook = new HSSFWorkbook(fileStream);
            // 删除外部链接
            workbook.ExternalLinksTable.RemoveAggregate();
            // 保存更改
            workbook.Write(fileStream);
        }
    }
}