xBk.Close(false, Type.Missing, Type.Missing); excel.Quit(); System.Runtime.InteropServices.Marshal.ReleaseComObject(xBk); //释放工作表 System.Runtime.InteropServices.Marshal.ReleaseComObject(xSt); System.Runtime.InteropServices.Marshal.ReleaseComObject(excel); xSt = null; excel = null; xBk = null; GC.Collect();