private void btnOk_Click(object sender, EventArgs e)
        {
            string strSql       = "select * from PmBorrow where 1=1";
            string strSqlNum    = "select * from PmPhone where 1 = 1";
            string strSqlNumOut = "select * from PmPhone where 1 = 1 and PhoneStatus = '借出'";
            string num          = "";
            string numOut       = "";

            txtNum.Text    = "";
            txtNumOut.Text = "";

            if (cbbStaffName.Text == "" && cbbPhoneName.Text == "" && cbbPhoneStage.Text == "" && cbbPhoneNum.Text == "" &&
                cbbHGroupTest.Text == "" && cbbIsNormal.Text == "" && cbbIsReturn.Text == "")
            {
                MessageBox.Show("请选择查询条件", "提示");
                return;
            }

            if (cbbStaffName.Text != "")
            {
                strSql = strSql + " and StaffName ='" + cbbStaffName.Text + "'";
            }
            if (cbbPhoneName.Text != "")
            {
                strSql = strSql + " and PhoneName ='" + cbbPhoneName.Text + "'";
            }
            if (cbbPhoneStage.Text != "")
            {
                strSql = strSql + " and PhoneStage ='" + cbbPhoneStage.Text + "'";
            }
            if (cbbPhoneNum.Text != "")
            {
                strSql = strSql + " and PhoneNum ='" + cbbPhoneNum.Text + "'";
            }
            if (cbbHGroupTest.Text != "")
            {
                strSql = strSql + " and Test ='" + cbbHGroupTest.Text + "'";
            }
            if (cbbIsNormal.Text != "")
            {
                strSql = strSql + " and IsNormal ='" + cbbIsNormal.Text + "'";
            }
            if (cbbIsReturn.Text != "")
            {
                strSql = strSql + " and IsReturn ='" + cbbIsReturn.Text + "'";
            }

            strSql = strSql + " order by BorrowID desc";

            BorrowBLL borrowbll = new BorrowBLL();

            borrows = borrowbll.selByCondition(strSql);
            borrowQDataGrid.DataSource = borrows;

            PhoneBLL phonebll = new PhoneBLL();


            if (cbbPhoneName.Text != "")
            {
                strSqlNum    = strSqlNum + " and PhoneName ='" + cbbPhoneName.Text + "'";
                strSqlNumOut = strSqlNumOut + " and PhoneName ='" + cbbPhoneName.Text + "'";

                if (cbbPhoneStage.Text != "")
                {
                    strSqlNum    = strSqlNum + " and PhoneStage ='" + cbbPhoneStage.Text + "'";
                    strSqlNumOut = strSqlNumOut + " and PhoneStage ='" + cbbPhoneStage.Text + "'";
                }

                num            = phonebll.selByConditionNum(strSqlNum);
                numOut         = phonebll.selByConditionNum(strSqlNumOut);
                txtNum.Text    = num;
                txtNumOut.Text = numOut;
            }
        }