机房收费系统之上机、下机

上机流程图：

对应的代码：

'#################################################################'上机，将上机记录写入到上机记录表里'#################################################################Private Sub cmdOn_Click()    Dim strSQL As String, strSQL2 As String, strSQL3 As String    Dim strMsgText As String, strMsgText2 As String, strMsgText3 As String    Dim objRst As ADODB.Recordset, objRst2 As ADODB.Recordset, objRst3 As ADODB.Recordset        '让下机日期和时间，消费时间和金额为空    txtOutDate.Text = ""    txtOutTime.Text = ""    txtPayTime.Text = ""    txtPayMoney.Text = ""        If txtCardNo.Text = "" Then        '判断卡号是否为空        MsgBox "请输入卡号！", vbOKOnly, "警告!"        txtCardNo.SetFocus        Exit Sub    Else        If Len(txtCardNo.Text) > 10 Then            '判断输入卡号是否超过设定的长度，防止出错            MsgBox "卡号过长，请输入长度<10的卡号", vbOKOnly, "警告!"            txtCardNo.SetFocus            Exit Sub        End If        '查询数据库里学生基本信息表        Set objRst = New ADODB.Recordset        strSQL = "select * from student_Info where cardNo='" & Trim(txtCardNo.Text) & "'"        Set objRst = ExecuteSQL(strSQL, strMsgText)        If objRst.BOF And objRst.EOF Then            '判读该卡号是否存在            MsgBox "该卡号未注册!", vbOKOnly, "警告!"            txtCardNo.Text = ""            txtCardNo.SetFocus            Exit Sub        Else            '判断余额是否充足            If objRst.Fields(3) < GetLeastMoney() Then                MsgBox "余额只有" & objRst.Fields(3) & ",少于最少金额，请先充值！", vbOKOnly, "警告!"                Exit Sub            Else                            '判断该卡号是否正在上机                Set objRst3 = New ADODB.Recordset                strSQL3 = "select * from online_Info where cardNo='" & Trim(txtCardNo.Text) & "' and outDate is null"                Set objRst3 = ExecuteSQL(strSQL3, strMsgText3)                If Not (objRst3.BOF And objRst3.EOF) Then                    Label1.Caption = "该卡正在上机!"                    txtCardNo.SetFocus                    Exit Sub                Else                                    '显示该卡号的一些基本信息                    txtStudentNo.Text = checkField(objRst.Fields(0))                    txtDepartment.Text = checkField(objRst.Fields(4))                    txtType.Text = checkField(objRst.Fields(14))                    txtStudentName.Text = checkField(objRst.Fields(1))                    txtSex.Text = checkField(objRst.Fields(7))                    txtOnDate.Text = Date                    'onTime = Time                    txtOnTime.Text = Time                    txtAllCash.Text = checkField(objRst.Fields(3))                                '将上机前的余额提出来，用于下机时计算余额                    'curAllCash = checkField(objRst.Fields(3))                    Label1.Caption = "欢迎光临！"                                '将该卡上机的信息填入到online_Info表里                    Set objRst2 = New ADODB.Recordset                    strSQL2 = "select * from online_Info "                    Set objRst2 = ExecuteSQL(strSQL2, strMsgText2)                    'objRst2.MoveLast                    objRst2.AddNew                    objRst2.Fields(0) = txtCardNo.Text                    objRst2.Fields(1) = txtStudentName.Text                    objRst2.Fields(2) = Date                    objRst2.Fields(3) = Time                    objRst2.Fields(4) = Null                    objRst2.Fields(5) = Null                    objRst2.Update                    '查询此时正在上机的人数。（可以直接加1）                    lblPeopleCount.Caption = GetPeopleCount()                    PeopleCount = GetPeopleCount()   '保存正在上机的人数                    objRst2.Close                                objRst.Close                End If            End If        End If    End If                        End Sub

下机的流程图：

对应的代码：

'#####################################################################'下机,计算余额，将余额写入学生信息表里，和上机信息表里'#####################################################################Private Sub cmdOff_Click()    Dim strSQL As String, strSQL2 As String, strSQL3 As String    Dim strMsgText As String, strMsgText2 As String, strMsgText3 As String    Dim objRst As ADODB.Recordset, objRst2 As ADODB.Recordset, objRst3 As ADODB.Recordset    Dim intTime As Single    Dim fixedRate As Single    Dim AllMoney As Currency    Dim pay As Currency    If txtCardNo.Text = "" Then        '判断卡号是否为空        MsgBox "请输入卡号！", vbOKOnly, "警告!"        txtCardNo.SetFocus        Exit Sub    Else        If Len(txtCardNo.Text) > 10 Then            '判断输入卡号是否超过设定的长度，防止出错            MsgBox "卡号过长，请输入长度<10的卡号", vbOKOnly, "警告!"            txtCardNo.SetFocus            Exit Sub        End If    End If    Set objRst = New ADODB.Recordset    strSQL = "select * from student_Info where cardNo='" & Trim(txtCardNo.Text) & "'"    Set objRst = ExecuteSQL(strSQL, strMsgText)    If objRst.BOF And objRst.EOF Then        '判读该卡号是否存在        MsgBox "该卡号未注册!", vbOKOnly, "警告!"        txtCardNo.Text = ""        txtCardNo.SetFocus        Exit Sub            End If    objRst.Close    strSQL = ""    strMsgText = ""                Set objRst = New ADODB.Recordset    strSQL = "select * from online_Info where cardno='" & Trim(txtCardNo.Text) & "' and outDate is null "    Set objRst = ExecuteSQL(strSQL, strMsgText)    If objRst.BOF And objRst.EOF Then        '判断该卡是否正在上机        Label1.Caption = "该卡没有上机！"        txtCardNo.SetFocus        Exit Sub    Else        '显示下机的一些信息        txtOutDate.Text = Date        outTime = Time        txtOutTime.Text = outTime                onTime = CDate(Format(objRst.Fields("onTime"), "hh:mm:ss"))            txtCardNo.Text = checkField(objRst.Fields("cardNo"))        txtStudentName.Text = checkField(objRst.Fields("studentName"))        txtOnDate.Text = checkField(objRst.Fields("onDate"))        txtOnTime.Text = checkField(objRst.Fields("onTime"))                Set objRst3 = New ADODB.Recordset        strSQL3 = "select * from student_Info where cardNo='" & txtCardNo.Text & "'"        Set objRst3 = ExecuteSQL(strSQL3, strMsgText3)        txtStudentNo.Text = objRst3.Fields("studentNo")        txtDepartment.Text = objRst3.Fields("department")        txtSex.Text = objRst3.Fields("sex")        txtType.Text = "固定用户"                '删除该记录，将此时信息填入online_Info表里        objRst.Delete        objRst.AddNew        objRst.Fields(0) = txtCardNo.Text        objRst.Fields(1) = txtStudentName.Text        objRst.Fields(2) = txtOnDate.Text        objRst.Fields("onTime") = txtOnTime.Text        objRst.Fields(4) = txtOutDate.Text        objRst.Fields("outTime") = txtOutTime.Text        objRst.Fields(9) = "正常下机"        'intTime = Val(txtOutTime.Text - txtOnTime.Text)                '计算上机的时间        intTime = (outTime - onTime) * 24 * 2                         Set objRst2 = New ADODB.Recordset         strSQL2 = "select * from basicDate_Info "         Set objRst2 = ExecuteSQL(strSQL2, strMsgText2)         '查询固定用户30分钟的费用         fixedRate = Val(objRst2.Fields(0))         If intTime < (GetPreparTime() / 30) Then             '判断上机时间是否超过了准备时间，没超过则花费为0             objRst.Fields("pay") = 0             objRst.Fields("allCash") = GetAllMoney(txtCardNo.Text)         Else             If intTime <= (GetLeastTime() / 30) Then                 '判断上机时间是否超过半个小时，没则当成已经上了30分钟                 objRst.Fields("pay") = fixedRate                 AllMoney = GetAllMoney(txtCardNo.Text) - fixedRate                 objRst.Fields("allCash") = AllMoney     '将余额写入上机记录表里                 WriteAllMoney txtCardNo.Text, AllMoney  '将余额写入学生基本信息表里             Else                 If intTime > Int(intTime) Then                     intTime = Int(intTime) + 1                 Else                     intTime = Int(intTime)                 End If                 pay = fixedRate * intTime                 objRst.Fields("pay") = pay                 AllMoney = GetAllMoney(txtCardNo.Text) - pay                 objRst.Fields("allCash") = AllMoney    '将余额写入上机记录表里                 WriteAllMoney txtCardNo.Text, AllMoney  '将余额写入学生基本信息表里             End If         End If                  '显示消费的时间金额，和余额         txtPayTime.Text = Format(outTime - onTime, "hh-mm-ss")         txtPayMoney.Text = objRst.Fields(6)         txtAllCash.Text = GetAllMoney(txtCardNo.Text)     '- objRst.Fields(6)         Label1.Caption = "欢迎下次再来!"                  objRst.Fields(7) = txtAllCash.Text    '将余额写到online_Info表里                  lblPeopleCount.Caption = GetPeopleCount()  '显示正在上机人数         PeopleCount = GetPeopleCount()         objRst.Update                 objRst.Close         objRst2.Close         objRst3.Close             End If            End Sub

其中，有一些是自己写的函数。GetPeopleCount()是取得正在上机的函数，GetAllMoney(txtCardNo.Text)是取得余额的函数，GetLeastTime()是取得至少上机时间的函数，GetPreparTime()是取得准备上机时间，GetFixedRate()是取得固定用户30分钟的费用。

7楼tang_huan_116小时前

很好,加油!

6楼gwblue昨天 21:41

很好，很详细继续加油！

5楼lidaasky昨天 22:45

登录方面，你可以尝试使用单if判断，嵌套的if容易搞混，图画的不错

4楼yjjm1990昨天 22:40

嗯，挺好的，就是if那样嵌套不好，还有自己注意一个变更的命名。很不错！加油！

3楼hejingyuan6昨天 21:21

哈哈，加油呀

2楼lishehe昨天 20:58

不错啊，学习了方法很多啊，相互交流

1楼lfmilaoshi昨天 20:40

图不错，很好n米老师