C#Microsoft Excel 16.0 Object Library automatically releases resources after using Excel, and closes the background running process method

Because of the need to read Excel in xls format, use Microsoft Excel 16.0 Object Library to solve the method of automatically releasing resources after using Excel and closing the background running process (it will be automatically released when the program needs to be closed, or you can use the handle to close the process method)

using Excel = Microsoft.Office.Interop.Excel;

public class ExcelHelper
{
    public void ProcessExcelFile(string filePath)
    {
        Excel.Application excelApp = null;
        Excel.Workbook workbook = null;
        Excel.Worksheet worksheet = null;

        try
        {
            // 创建Excel应用程序对象
            excelApp = new Excel.Application();

            // 打开Excel文件
            workbook = excelApp.Workbooks.Open(filePath);

            // 获取第一个工作表
            worksheet = workbook.Worksheets[1];

            // 在这里进行Excel操作，例如读取或写入数据

            // 保存并关闭Excel文件
            workbook.Save();
            workbook.Close();

            // 释放Excel对象
            Marshal.ReleaseComObject(worksheet);
            Marshal.ReleaseComObject(workbook);
            Marshal.ReleaseComObject(excelApp);
        }
        catch (Exception ex)
        {
            // 处理异常
        }
        finally
        {
            // 确保释放资源
            if (worksheet != null)
            {
                Marshal.FinalReleaseComObject(worksheet);
            }
            if (workbook != null)
            {
                Marshal.FinalReleaseComObject(workbook);
            }
           
        }
    }
}

Note: This method can only be used once to open Excel and close the process. It may not work multiple times. You need to completely close the Microsoft Excel process. Please use the method used to kill the Excel process:

using System;
using System.Diagnostics;
public static void KillExcelProcesses()
    {
        Process[] processes = Process.GetProcessesByName("EXCEL");

        foreach (Process process in processes)
        {
            try
            {
                process.Kill();
                process.WaitForExit();
                process.Close();
            }
            catch (Exception ex)
            {
                // 处理异常情况
                Console.WriteLine("无法杀死Excel进程：" + ex.Message);
            }
        }
    }

For other methods, please refer to: C# completely release EXCEL_c# release excel_lainY7mail's blog-CSDN blog

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