使用backgroundWorker组件，为什么还会占用主线程，导致卡的现象?
直接贴代码
打断点看的时候，主线程执行完backgroundWorker1.RunWorkerAsync();后 断点出了这里-> } 就一直卡着界面，要等OldUpload运行完才有反应
private void btnOldUpload_Click(object sender, EventArgs e) { backgroundWorker1.RunWorkerAsync(); } private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e) { OldUpload(); } private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e) { if (e.Error != null) Console.WriteLine("error"); else { MSG("上传结束!"); } } /**需要长时间执行的方法**/ private void OldUpload() { int ucount = dgvUsers.Rows.Count; int mcount = dgvOldMachines.Rows.Count; for (int i = 0; i < mcount; i++)// { dgvOldMachines.EndEdit(); DataGridViewCheckBoxCell ckoldmachine = (DataGridViewCheckBoxCell)dgvOldMachines.Rows[i].Cells["xuanold"]; Boolean flag = Convert.ToBoolean(ckoldmachine.Value); if (flag == true)//datagridview 设备选中的信息 { int iMachineNumber = Convert.ToInt32(dgvOldMachines.Rows[i].Cells[2].Value.ToString()); MachineInfo m = MachineInfoBLL.SelectMachineInfoByEqpID(iMachineNumber.ToString()); for (int j = 0; j < ucount; j++) { dgvUsers.EndEdit(); DataGridViewCheckBoxCell checkcell = (DataGridViewCheckBoxCell)dgvUsers.Rows[j].Cells["Column1"]; Boolean flagm = Convert.ToBoolean(checkcell.Value); if (flagm == true)//datagridview人员选中的信息 { try { int idwEnrollNumber = Convert.ToInt32(dgvUsers.Rows[j].Cells[1].Value.ToString()); string sName = dgvUsers.Rows[j].Cells[2].Value.ToString(); if (Connect(axCZKEM1, m.Ip, m.Port, iMachineNumber.ToString(), Convert.ToInt32(m.Commpassword))) { // MSG("连接成功!"); int idwErrorCode = 0; int idwFingerIndex = 0; string sTmpData = ""; int iPrivilege = 0; bool bEnabled = true; int iUpdateFlag = 1; string sPassword = ""; int iFlag = 1; axCZKEM1.EnableDevice(iMachineNumber, false); int iLastEnrollNumber = 0;//判断是否已上传用户信息 if (axCZKEM1.BeginBatchUpdate(iMachineNumber, iUpdateFlag))//创建批处理数据的内存空间 { List<TempLate> tl = TempLateBLL.GetOldTempLateBySSN(idwEnrollNumber.ToString());//根据考勤号查询新机器指纹信息 if (tl.Count != 0) { foreach (TempLate t in tl) { idwFingerIndex = t.Fingerid; sTmpData = t.Template; if (idwEnrollNumber != iLastEnrollNumber)//判断是否已上传用户信息（指纹信息除外） { if (axCZKEM1.SetUserInfo(iMachineNumber, idwEnrollNumber, sName, sPassword, iPrivilege, bEnabled))//上传用户信息到内存 { axCZKEM1.SetUserTmpStr(iMachineNumber, idwEnrollNumber, idwFingerIndex, sTmpData);//上传指纹信息到内存 // MSG("上传用户" + idwEnrollNumber.ToString() + "信息成功，指纹ID" + idwFingerIndex + "，指纹长度" + sTmpData.Length + ""); } else { axCZKEM1.GetLastError(ref idwErrorCode); axCZKEM1.EnableDevice(iMachineNumber, true); MessageBox.Show("Operation failed,ErrorCode=" + idwErrorCode.ToString(), "Error"); return; } } else//一个用户拥有多个指纹模板的情况 { axCZKEM1.SetUserTmpStr(iMachineNumber, idwEnrollNumber, idwFingerIndex, sTmpData);//上传指纹模板 // MSG("上传用户" + idwEnrollNumber.ToString() + "信息成功，指纹ID" + idwFingerIndex + "，指纹长度" + sTmpData.Length + ""); } iLastEnrollNumber = idwEnrollNumber;//动态地改变值 } axCZKEM1.BatchUpdate(iMachineNumber);//上传所有信息到内存 axCZKEM1.RefreshData(iMachineNumber);//机器数据刷新 axCZKEM1.EnableDevice(iMachineNumber, true);//启用设备 } else { // MSG("数据库里没有数据，请先在线上传指纹!"); } } } } catch (Exception ex) { MessageBox.Show(ex.ToString()); } finally { axCZKEM1.EnableDevice(iMachineNumber, true); axCZKEM1.Disconnect(); } } } } } private void MSG(string body) { this.BeginInvoke((MethodInvoker)(() => { dgvMessages.Rows.Add(new string[] { (dgvMessages.Rows.Count + 1).ToString(), body, DateTime.Now.ToString() }); dgvMessages.FirstDisplayedScrollingRowIndex = dgvMessages.Rows.Count - 1; })); }