机票信息列表.vb

这是个用VB编写的机票销售与查询管理系统

Imports System.Data
Imports System.Data.SqlClient
Public Class 机票信息列表
    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 Label1 As System.Windows.Forms.Label
    Friend WithEvents DataGrid1 As System.Windows.Forms.DataGrid
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.Label1 = New System.Windows.Forms.Label
        Me.DataGrid1 = New System.Windows.Forms.DataGrid
        CType(Me.DataGrid1, System.ComponentModel.ISupportInitialize).BeginInit()
        Me.SuspendLayout()
        '
        'Label1
        '
        Me.Label1.Font = New System.Drawing.Font("宋体", 42.0!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(134, Byte))
        Me.Label1.Location = New System.Drawing.Point(64, 8)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(376, 64)
        Me.Label1.TabIndex = 0
        Me.Label1.Text = "机票信息列表"
        '
        'DataGrid1
        '
        Me.DataGrid1.DataMember = ""
        Me.DataGrid1.HeaderForeColor = System.Drawing.SystemColors.ControlText
        Me.DataGrid1.Location = New System.Drawing.Point(-8, 72)
        Me.DataGrid1.Name = "DataGrid1"
        Me.DataGrid1.Size = New System.Drawing.Size(536, 312)
        Me.DataGrid1.TabIndex = 1
        '
        '机票信息列表
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(528, 382)
        Me.Controls.Add(Me.DataGrid1)
        Me.Controls.Add(Me.Label1)
        Me.Name = "机票信息列表"
        Me.Text = "机票信息列表"
        CType(Me.DataGrid1, System.ComponentModel.ISupportInitialize).EndInit()
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub 机票信息列表_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
        con = "select * from ticketinfo"
        ds = my_class.query(con)
        DataGrid1.DataSource = ds.Tables(0)
    End Sub

    Private Sub 机票信息列表_Closed(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Closed
        Dim mdifrm As New MDIForm1
        mdifrm = Me.MdiParent
        mdifrm.ToolBarButton1.Enabled = False
        mdifrm.ToolBarButton2.Enabled = False
        mdifrm.ToolBarButton3.Enabled = False
        mdifrm.ToolBarButton4.Enabled = False
        mdifrm.ToolBarButton5.Enabled = False
        mdifrm.ToolBarButton7.Enabled = False
        mdifrm.ToolBarButton8.Enabled = False
    End Sub

    Private Sub DataGrid1_Navigate(ByVal sender As System.Object, ByVal ne As System.Windows.Forms.NavigateEventArgs) Handles DataGrid1.Navigate

    End Sub

    Private Sub DataGrid1_CurrentCellChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles DataGrid1.CurrentCellChanged
        Dim count As Integer
        Dim ds As DataSet
        Dim con As String
        con = "select * from ticketinfo"
        ds = my_class.query(con)
        count = ds.Tables(0).Rows.Count
        '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
        If ds.Tables(0).Rows.Count < 0 Then
            Exit Sub
        End If
        x6 = DataGrid1.Item(DataGrid1.CurrentRowIndex, 0)
    End Sub

    Private Sub 机票信息列表_Activated(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Activated
        ct = 61
        Dim mdifrm As New MDIForm1
        mdifrm = Me.MdiParent
        mdifrm.ToolBarButton5.Enabled = True
        mdifrm.MenuItem22.Enabled = True

        mdifrm.StatusBar1.Panels(0).Text = Me.Text
        Dim ds As DataSet
        Dim con As String
        con = "select * from ticketinfo"
        ds = my_class.query(con)
        Try
            DataGrid1.DataSource = ds.Tables(0)
        Catch ex As Exception
            MessageBox.Show(ex.Message)
        End Try
    End Sub
End Class