VB航空公司管理信息系统 第12页
图9-25 显示机票信息的窗体
11.2 添加订票信息窗体的创建
在机票信息列表中单击“添加”按钮，将出现如图9-26所示的窗体，用来添加订票信息。
 
图9-26 添加订票信息的窗体
机票信息包括两部分：航线信息和客户信息。选择出发城市和到达城市，将得到相应的航线信息；选择客户姓名得到相应的客户信息。窗体载入时要求在列表框中加入所有有关航线和客户的信息，代码如下：
Private Sub Form_Load()
    Dim intCount As Integer
    Dim MsgText As String
    Dim i As Integer
    Dim mrcc As ADODB.Recordset
    ‘判断所处状态，添加或者修改
    If gintKmode = 1 Then
        Me.Caption = Me.Caption & "添加"
        ‘产生随机的订票编号
        txtticket = GetRkno()
    ElseIf gintKmode = 2 Then
        Set mrc = ExecuteSQL(txtSQL, MsgText)
        ‘判断数据集对象是否为空
        If mrc.EOF = False Then
            With mrc
                txtticket = .Fields(0)
                txtItem(0) = .Fields(7)
                txtItem(1) = .Fields(12)
            End With
        End If
        Me.Caption = Me.Caption & "修改"
    End If
    ‘清楚列表框中内容
        For i = 0 To 6
            Combo1(i).Clear
        Next i
        ‘选择数据库中所有与出发城市有关的信息
        txtSQL = "select distinct departCity from airlineInfo "
        Set mrcc = ExecuteSQL(txtSQL, MsgText)
        ‘判断数据集对象是否为空
        If Not mrcc.EOF Then
            Do While Not mrcc.EOF
                Combo1(0).AddItem mrcc.Fields(0)
                mrcc.MoveNext
            Loop
        End If
        ‘关闭数据集对象
        mrcc.Close
        ‘选择数据库中所有与到达城市有关的信息
        txtSQL = "select distinct arrivalCity from airlineInfo"

        Set mrcc = ExecuteSQL(txtSQL, MsgText)
        ‘判断数据集对象是否为空
        If Not mrcc.EOF Then
            Do While Not mrcc.EOF
                Combo1(1).AddItem mrcc.Fields(0)
                mrcc.MoveNext
            Loop
        End If
        ‘关闭数据集对象
        mrcc.Close
        ‘选择数据库中所有与舱位等级有关的信息
        txtSQL = "select distinct serviceName from serviceInfo"
        Set mrcc = ExecuteSQL(txtSQL, MsgText)
        ‘判断数据集对象是否为空
        If Not mrcc.EOF Then
            Do While Not mrcc.EOF
                Combo1(2).AddItem mrcc.Fields(0)
                mrcc.MoveNext
            Loop
        End If
        ‘关闭数据集对象
        mrcc.Close
        ‘选择数据库中所有与客户姓名有关的信息
        txtSQL = "select distinct customerName from customerInfo"
        Set mrcc = ExecuteSQL(txtSQL, MsgText)
        ‘判断数据集对象是否为空
        If Not mrcc.EOF Then
            Do While Not mrcc.EOF
                Combo1(4).AddItem mrcc.Fields(0)
                mrcc.MoveNext
            Loop
        End If
        ‘关闭数据集对象
        mrcc.Close
    mblChange = False
End Sub
选择出发城市和到达城市，然后选择舱位类型，将自动显示票价，并用不可见文本框（txtairline、txtairline等）记载航线编号、客户编号等信息。实现代码加在列表框的Click事件中，如下：

Private Sub Combo1_Click(Index As Integer)
    Dim mrcc As ADODB.Recordset
    Dim mrcd As ADODB.Recordset
    Dim MsgText As String
    ‘判断列表框编号
    If Index = 2 Then
        ‘判断出发城市和到达城市是否选择
        If Not (Trim(Combo1(0)) = "" Or Trim(Combo1(1)) = "") Then
            txtSQL = "select *  from airlineInfo where departCity = '" & Trim(Combo1(0)) & "' and arrivalCity = '" & Trim(Combo1(1)) & "'"
            Set mrcc = ExecuteSQL(txtSQL, MsgText)
            ‘判断数据集对象是否为空
            If Not mrcc.EOF Then
                txtairline = mrcc.Fields(0)
                ticketCsum = mrcc!planeNO
                If Trim(Combo1(2)) = "经济舱" Then
                    Combo1(3).Clear
                    Combo1(3).AddItem mrcc.Fields(7)
                    Combo1(3).ListIndex = 0
                ElseIf Trim(Combo1(2)) = "公务舱" Then
                    Combo1(3).Clear
                    Combo1(3).AddItem mrcc.Fields(8)
                    Combo1(3).ListIndex = 0
                Else
                    Combo1(3).Clear
                    Combo1(3).AddItem mrcc.Fields(9)
                    Combo1(3).ListIndex = 0
                End If
            End If
            ‘关闭数据集对象
            mrcc.Close

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