C# 如何清除excel互操作com组件

嗨，我的代码中有两个部分，一个是创建一个excel，然后通过电子邮件发送。 我得到的错误是： IOException:进程无法访问文件“filename”，因为其他进程正在使用该文件

我怎样才能摆脱这种状况： 代码如下：

    public void createexcel()
    {

        Excel.Application oXL;
        Excel._Workbook oWB;
        Excel._Worksheet oSheet;
        oXL = new Excel.Application();


        oWB = (Excel._Workbook)(oXL.Workbooks.Add(Missing.Value));
       // oSheet = (Excel._Worksheet)oWB.ActiveSheet;
       //oSheet = (Excel._Worksheet)oWB.Worksheets.get_Item(2);
      //oSheet = (Excel._Worksheet)oWB.Worksheets.get_Item(2);
        oSheet = (Excel._Worksheet)oWB.Worksheets.get_Item(1);

        //  oWB.Colors(1);

        oSheet.Cells[1, 1] = "Expected_Result";
        oSheet.Cells[1, 2] = "Actual_Result";
        oSheet.Cells[1, 3] = "Test_Status";


        //Format A1:D1 as bold, vertical alignment = center.
        oSheet.get_Range("A1", "D1").Font.Bold = true;
        oSheet.get_Range("A1", "D1").Font.Color = 0;
        oSheet.get_Range("A1", "D1").VerticalAlignment =
        Excel.XlVAlign.xlVAlignCenter;
        oSheet.Name = "Hotel_Total_Oppy_Verification";
       loc = "c:\\" + "TestResults_" + DateTime.Now.ToString("ddMMMMyyHHMMss");
        oWB.SaveAs(loc + ".xlsx");

        oWB.Close();

    }





    public void emailtestresults (string testresult)
    {

        string to = "abc@abc.com";
        string from = "abc@bc.com";
        MailMessage message = new MailMessage(from, to);
        message.Subject = " Test Result for Run of ." + DateTime.Today.ToString("DD/MM/YY/HHMMss") + "is " + emailresult;
        message.Body = @"Verify the results from the attached excel sheet or look at the Screenshot.";
        string PathToAttachment = loc + ".xlsx";
        message.Attachments.Add(new Attachment(PathToAttachment));
        SmtpClient client = new SmtpClient("xxxxxx");
        // Credentials are necessary if the server requires the client  
        // to authenticate before it will send e-mail on the client's behalf.
        client.UseDefaultCredentials = true;

        try
        {
            client.Send(message);
            DateTime now = DateTime.Now;

        }
        catch (Exception ex)
        {
            Console.WriteLine("Exception caught in CreateTestMessage2(): {0}", ex.ToString());
            Console.ReadLine();
        }
    }

---

我总是这样结束Excel互操作组件：

owB.Close();
owX.Quit();
Marshal.FinalReleaseComObject(oSheet);
Marshal.FinalReleaseComObject(owB);
Marshal.FinalReleaseComObject(owX);

但是您的

IOException

的问题是，未经管理员许可，您无法访问目录C:\

请尝试将其保存在用户路径中（或）：

或使用：

string loc = Environment.GetFolderPath(Environment.SpecialFolder.Personal);

---

试着查看

封送.释放对象（oWB）

这同样适用于

oXL

oSheet=null

在

oWB.Close（）之后尝试
oXL.Quit（）。实际上，我使用的是oledb方法调用，在添加连接关闭步骤后，我从未关闭过该连接。成功了。感谢大家的投入，我可以避免一些垃圾在内存中，无论如何都会被创建。
string loc = Environment.GetFolderPath(Environment.SpecialFolder.Personal);