机票信息查询.vb

这是个用VB编写的机票销售与查询管理系统

Public Class 机票信息查询
    Inherits System.Windows.Forms.Form

#Region " Windows 窗体设计器生成的代码 "

    Public Sub New()
        MyBase.New()

        '该调用是 Windows 窗体设计器所必需的。
        InitializeComponent()

        '在 InitializeComponent() 调用之后添加任何初始化

    End Sub

    '窗体重写 dispose 以清理组件列表。
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing Then
            If Not (components Is Nothing) Then
                components.Dispose()
            End If
        End If
        MyBase.Dispose(disposing)
    End Sub

    'Windows 窗体设计器所必需的
    Private components As System.ComponentModel.IContainer

    '注意: 以下过程是 Windows 窗体设计器所必需的
    '可以使用 Windows 窗体设计器修改此过程。
    '不要使用代码编辑器修改它。
    Friend WithEvents GroupBox1 As System.Windows.Forms.GroupBox
    Friend WithEvents ComboBox1 As System.Windows.Forms.ComboBox
    Friend WithEvents ComboBox2 As System.Windows.Forms.ComboBox
    Friend WithEvents ComboBox3 As System.Windows.Forms.ComboBox
    Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents Button2 As System.Windows.Forms.Button
    Friend WithEvents Button3 As System.Windows.Forms.Button
    Friend WithEvents Label3 As System.Windows.Forms.Label
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents Label4 As System.Windows.Forms.Label
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.GroupBox1 = New System.Windows.Forms.GroupBox
        Me.TextBox1 = New System.Windows.Forms.TextBox
        Me.ComboBox3 = New System.Windows.Forms.ComboBox
        Me.ComboBox2 = New System.Windows.Forms.ComboBox
        Me.ComboBox1 = New System.Windows.Forms.ComboBox
        Me.Label3 = New System.Windows.Forms.Label
        Me.Button1 = New System.Windows.Forms.Button
        Me.Button2 = New System.Windows.Forms.Button
        Me.Button3 = New System.Windows.Forms.Button
        Me.Label1 = New System.Windows.Forms.Label
        Me.Label2 = New System.Windows.Forms.Label
        Me.Label4 = New System.Windows.Forms.Label
        Me.GroupBox1.SuspendLayout()
        Me.SuspendLayout()
        '
        'GroupBox1
        '
        Me.GroupBox1.Controls.Add(Me.Label4)
        Me.GroupBox1.Controls.Add(Me.Label2)
        Me.GroupBox1.Controls.Add(Me.Label1)
        Me.GroupBox1.Controls.Add(Me.TextBox1)
        Me.GroupBox1.Controls.Add(Me.ComboBox3)
        Me.GroupBox1.Controls.Add(Me.ComboBox2)
        Me.GroupBox1.Controls.Add(Me.ComboBox1)
        Me.GroupBox1.Controls.Add(Me.Label3)
        Me.GroupBox1.Location = New System.Drawing.Point(16, 24)
        Me.GroupBox1.Name = "GroupBox1"
        Me.GroupBox1.Size = New System.Drawing.Size(560, 128)
        Me.GroupBox1.TabIndex = 0
        Me.GroupBox1.TabStop = False
        Me.GroupBox1.Text = "航线信息"
        '
        'TextBox1
        '
        Me.TextBox1.Location = New System.Drawing.Point(144, 88)
        Me.TextBox1.Name = "TextBox1"
        Me.TextBox1.Size = New System.Drawing.Size(120, 21)
        Me.TextBox1.TabIndex = 7
        Me.TextBox1.Text = ""
        '
        'ComboBox3
        '
        Me.ComboBox3.Location = New System.Drawing.Point(432, 88)
        Me.ComboBox3.Name = "ComboBox3"
        Me.ComboBox3.Size = New System.Drawing.Size(121, 20)
        Me.ComboBox3.TabIndex = 6
        '
        'ComboBox2
        '
        Me.ComboBox2.Location = New System.Drawing.Point(432, 32)
        Me.ComboBox2.Name = "ComboBox2"
        Me.ComboBox2.Size = New System.Drawing.Size(121, 20)
        Me.ComboBox2.TabIndex = 5
        '
        'ComboBox1
        '
        Me.ComboBox1.Location = New System.Drawing.Point(144, 32)
        Me.ComboBox1.Name = "ComboBox1"
        Me.ComboBox1.Size = New System.Drawing.Size(121, 20)
        Me.ComboBox1.TabIndex = 4
        '
        'Label3
        '
        Me.Label3.Location = New System.Drawing.Point(48, 88)
        Me.Label3.Name = "Label3"
        Me.Label3.Size = New System.Drawing.Size(72, 23)
        Me.Label3.TabIndex = 2
        Me.Label3.Text = "出发时间"
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(64, 176)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(120, 40)
        Me.Button1.TabIndex = 1
        Me.Button1.Text = "确定(&o)"
        '
        'Button2
        '
        Me.Button2.Location = New System.Drawing.Point(248, 176)
        Me.Button2.Name = "Button2"
        Me.Button2.Size = New System.Drawing.Size(120, 40)
        Me.Button2.TabIndex = 2
        Me.Button2.Text = "取消(&x)"
        '
        'Button3
        '
        Me.Button3.Location = New System.Drawing.Point(424, 176)
        Me.Button3.Name = "Button3"
        Me.Button3.Size = New System.Drawing.Size(120, 40)
        Me.Button3.TabIndex = 9
        Me.Button3.Text = "重新查询 "
        '
        'Label1
        '
        Me.Label1.Location = New System.Drawing.Point(48, 32)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(72, 23)
        Me.Label1.TabIndex = 11
        Me.Label1.Text = "出发城市"
        '
        'Label2
        '
        Me.Label2.Location = New System.Drawing.Point(336, 32)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(72, 23)
        Me.Label2.TabIndex = 12
        Me.Label2.Text = "到达城市 "
        '
        'Label4
        '
        Me.Label4.Location = New System.Drawing.Point(336, 88)
        Me.Label4.Name = "Label4"
        Me.Label4.Size = New System.Drawing.Size(72, 23)
        Me.Label4.TabIndex = 13
        Me.Label4.Text = "舱位类型"
        '
        '机票信息查询
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(624, 246)
        Me.Controls.Add(Me.Button3)
        Me.Controls.Add(Me.Button2)
        Me.Controls.Add(Me.Button1)
        Me.Controls.Add(Me.GroupBox1)
        Me.Name = "机票信息查询"
        Me.Text = "机票信息查询"
        Me.GroupBox1.ResumeLayout(False)
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub 机票信息查询_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        ct = 61
        my_class.init()
        Dim ds As DataSet
        Dim con As String
        Dim count, i As Integer
        con = "select * from ticketinfo"
        ds = my_class.query(con)
        count = ds.Tables(0).Rows.Count
        For i = 0 To count - 1
            my_class.dr = ds.Tables(0).Rows(i)
            ComboBox1.Items.Add(Trim(CStr(my_class.dr("departcity"))))
            ComboBox2.Items.Add(Trim(CStr(my_class.dr("arrivalcity"))))
            ComboBox3.Items.Add(Trim(CStr(my_class.dr("servicetype"))))
        Next
    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim ds As DataSet
        Dim con, con1, con2, con3, con4 As String
        Dim str1, str2, str3, str4 As String
        Dim x, x1, x2, x3, x4, i As Integer
        str1 = ComboBox1.Text
        str2 = ComboBox2.Text
        str3 = ComboBox3.Text
        str4 = TextBox1.Text
        If (str1 = "" Or str2 = "" Or str3 = "" Or str4 = "") Then
            MessageBox.Show("请完成选择!", "提示")
        ElseIf (str1 = str2) Then
            MsgBox("出发地与目的地不能为同一地点！ 请重新选择！")
        Else
            con = "select * from ticketinfo where departcity='" + str1 + "'and arrivalcity='" + str2 + "' and servicetype='" + str3 + "' and ticketdate='" + str4 + "'"
            con1 = "select * from ticketinfo where departcity='" + str1 + "'"
            con2 = "select * from ticketinfo where arrivalcity='" + str2 + "'"
            con3 = "select * from ticketinfo where servicetype='" + str3 + "'"
            con4 = "select * from ticketinfo where ticketdate='" + str4 + "'"
            ds = my_class.query(con)
            x = ds.Tables(0).Rows.Count
            ds = my_class.query(con1)
            x1 = ds.Tables(0).Rows.Count
            ds = my_class.query(con2)
            x2 = ds.Tables(0).Rows.Count
            ds = my_class.query(con3)
            x3 = ds.Tables(0).Rows.Count
            ds = my_class.query(con4)
            x4 = ds.Tables(0).Rows.Count
            If (x > 0) Then
                my_class.dr = ds.Tables(0).Rows(0)
                MsgBox("还有" & TextBox1.Text & "从" & ComboBox1.Text & "到" & ComboBox2.Text & "的" & ComboBox3.Text & "机票!!")
            ElseIf (x1 <= 0) Then
                MsgBox("没有该出发城市！")
                ComboBox1.SelectAll()
            ElseIf (x2 <= 0) Then
                MsgBox("没有该到达城市！")
                ComboBox2.SelectAll()
            ElseIf (x3 <= 0) Then
                MsgBox("没有该客机类型！")
                ComboBox3.SelectAll()
            ElseIf (x4 <= 0) Then
                MsgBox("没有该出发时间！")
                TextBox1.Focus()
                TextBox1.SelectAll()
            Else
                MsgBox("没有" & TextBox1.Text & "从" & ComboBox1.Text & "到" & ComboBox2.Text & "的" & ComboBox3.Text & "机票!!")
            End If
        End If
    End Sub

    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
        ComboBox1.Text = ""
        ComboBox2.Text = ""
        ComboBox3.Text = ""
        ComboBox1.Items.Clear()
        ComboBox2.Items.Clear()
        ComboBox3.Items.Clear()
        TextBox1.Text = ""
        Dim ds As DataSet
        Dim con As String
        Dim count, i As Integer
        con = "select * from ticketinfo"
        ds = my_class.query(con)
        count = ds.Tables(0).Rows.Count
        For i = 0 To count - 1
            my_class.dr = ds.Tables(0).Rows(i)
            ComboBox1.Items.Add(Trim(CStr(my_class.dr("departcity"))))
            ComboBox2.Items.Add(Trim(CStr(my_class.dr("arrivalcity"))))
            ComboBox3.Items.Add(Trim(CStr(my_class.dr("servicetype"))))
        Next
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Me.Close()

    End Sub

    Private Sub 机票信息查询_Activated(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Activated
        Dim mdifrm As New MDIForm1
        mdifrm = Me.MdiParent
        mdifrm.StatusBar1.Panels(0).Text = Me.Text
    End Sub
End Class