大神进来帮忙，源文件调试正常编译后导入EXCEL出错

[ivanlmy]

说明: 执行当前 Web 请求期间，出现未经处理的异常。请检查堆栈跟踪信息，以了解有关该错误以及代码中导致错误的出处的详细信息。

异常详细信息: System.ComponentModel.Win32Exception: 拒绝访问。

源错误:


行 417: GetWindowThreadProcessId(pt, out k);
行 418: System.Diagnostics.Process p = System.Diagnostics.Process.GetProcessById(k);
行 419: p.Kill();
行 420: app = null;
行 421: }

源文件: d:\web\SalarySystem\InputPayByExcel_new.aspx.cs 行: 419

堆栈跟踪:


[Win32Exception (0x80004005): 拒绝访问。]
System.Diagnostics.Process.GetProcessHandle(Int32 access, Boolean throwIfExited) +9089348
System.Diagnostics.Process.Kill() +49
CallCenterOA.InputPayByExcel_new.CloseExcel(ApplicationClass app) in d:\web\SalarySystem\InputPayByExcel_new.aspx.cs:419
CallCenterOA.InputPayByExcel_new.ReadExcel(String filepath, String TabName, String MasterStartTitles, String MasterEndTitles, String MasterFields, String PayMonth, String zhichang, String xiangmu, Int32 DataRowStart, Int32 TitleRowStart, String DetailTabName) in d:\web\SalarySystem\InputPayByExcel_new.aspx.cs:216
CallCenterOA.InputPayByExcel_new.btnUpdate_Click(Object sender, EventArgs e) in d:\web\SalarySystem\InputPayByExcel_new.aspx.cs:76
System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +155
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3804

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源文件调试正常编译后导入EXCEL出错，请问是什么问题？有解决方法么？