frmmain.vb

用.net写的,不知道怎么样,各位看看再说吧.

Public Class frmMain
    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 MainMenu1 As System.Windows.Forms.MainMenu
    Friend WithEvents mnBasic As System.Windows.Forms.MenuItem
    Friend WithEvents mnRoomType As System.Windows.Forms.MenuItem
    Friend WithEvents mnManage As System.Windows.Forms.MenuItem
    Friend WithEvents mnReserve As System.Windows.Forms.MenuItem
    Friend WithEvents mnReside As System.Windows.Forms.MenuItem
    Friend WithEvents mnConsume As System.Windows.Forms.MenuItem
    Friend WithEvents mnCash As System.Windows.Forms.MenuItem
    Friend WithEvents mnRoomState As System.Windows.Forms.MenuItem
    Friend WithEvents mnExit As System.Windows.Forms.MenuItem
    Friend WithEvents mnRoomInfo As System.Windows.Forms.MenuItem
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Dim resources As System.Resources.ResourceManager = New System.Resources.ResourceManager(GetType(frmMain))
        Me.MainMenu1 = New System.Windows.Forms.MainMenu
        Me.mnBasic = New System.Windows.Forms.MenuItem
        Me.mnRoomType = New System.Windows.Forms.MenuItem
        Me.mnRoomInfo = New System.Windows.Forms.MenuItem
        Me.mnManage = New System.Windows.Forms.MenuItem
        Me.mnReserve = New System.Windows.Forms.MenuItem
        Me.mnReside = New System.Windows.Forms.MenuItem
        Me.mnConsume = New System.Windows.Forms.MenuItem
        Me.mnCash = New System.Windows.Forms.MenuItem
        Me.mnRoomState = New System.Windows.Forms.MenuItem
        Me.mnExit = New System.Windows.Forms.MenuItem
        '
        'MainMenu1
        '
        Me.MainMenu1.MenuItems.AddRange(New System.Windows.Forms.MenuItem() {Me.mnBasic, Me.mnManage, Me.mnRoomState, Me.mnExit})
        '
        'mnBasic
        '
        Me.mnBasic.Index = 0
        Me.mnBasic.MenuItems.AddRange(New System.Windows.Forms.MenuItem() {Me.mnRoomType, Me.mnRoomInfo})
        Me.mnBasic.Text = "基础设置(&W)"
        '
        'mnRoomType
        '
        Me.mnRoomType.Index = 0
        Me.mnRoomType.Text = "客房类型设置(&Y)"
        '
        'mnRoomInfo
        '
        Me.mnRoomInfo.Index = 1
        Me.mnRoomInfo.Text = "客房信息设置(&Z)"
        '
        'mnManage
        '
        Me.mnManage.Index = 1
        Me.mnManage.MenuItems.AddRange(New System.Windows.Forms.MenuItem() {Me.mnReserve, Me.mnReside, Me.mnConsume, Me.mnCash})
        Me.mnManage.Text = "业务管理(&X)"
        '
        'mnReserve
        '
        Me.mnReserve.Index = 0
        Me.mnReserve.Text = "预订管理(&W)"
        '
        'mnReside
        '
        Me.mnReside.Index = 1
        Me.mnReside.Text = "入住管理(&X)"
        '
        'mnConsume
        '
        Me.mnConsume.Index = 2
        Me.mnConsume.Text = "消费记帐(&Y)"
        '
        'mnCash
        '
        Me.mnCash.Index = 3
        Me.mnCash.Text = "收银退房(&Z)"
        '
        'mnRoomState
        '
        Me.mnRoomState.Index = 2
        Me.mnRoomState.Text = "房态管理(&Y)"
        '
        'mnExit
        '
        Me.mnExit.Index = 3
        Me.mnExit.Text = "退出系统(&Z)"
        '
        'frmMain
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(528, 241)
        Me.Icon = CType(resources.GetObject("$this.Icon"), System.Drawing.Icon)
        Me.IsMdiContainer = True
        Me.Menu = Me.MainMenu1
        Me.Name = "frmMain"
        Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
        Me.Text = "酒店管理系统"

    End Sub

#End Region

    Private Function GetInstanceState(ByVal name As String) As Boolean
        '获得frmMain窗体的子窗体的数量
        Dim i As Integer = Me.MdiChildren.Length
        '循环判断是否有名为name的子窗体实例
        For i = 0 To Me.MdiChildren.Length - 1
            If Me.MdiChildren(i).Name = name Then
                '存在名为name的子窗体，是子窗体获得焦点并返回True
                Me.MdiChildren(i).Focus()
                Return True
            End If
        Next
        '不存在名为Name的子窗体False
        Return False
    End Function

    Private Sub mnRoomType_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnRoomType.Click
        If GetInstanceState("frmRoomType") Then
            Exit Sub
        End If
        Dim childFrm As frmRoomType = New frmRoomType
        childFrm.MdiParent = Me
        childFrm.Show()
    End Sub

    Private Sub mnRoomState_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnRoomState.Click
        If GetInstanceState("frmRoomState") Then
            Exit Sub
        End If
        Dim childFrm As frmRoomState = New frmRoomState
        childFrm.MdiParent = Me
        childFrm.Show()
    End Sub

    Private Sub mnRoomInfo_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnRoomInfo.Click
        If GetInstanceState("frmRoomInfo") Then
            Exit Sub
        End If
        Dim childFrm As frmRoomInfo = New frmRoomInfo
        childFrm.MdiParent = Me
        childFrm.Show()
    End Sub

    Private Sub mnConsume_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnConsume.Click
        If GetInstanceState("frmConsume") Then
            Exit Sub
        End If
        Dim childFrm As frmConsume = New frmConsume
        childFrm.MdiParent = Me
        childFrm.Show()
    End Sub

    Private Sub mnReserve_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnReserve.Click
        If GetInstanceState("frmReserve") Then
            Exit Sub
        End If
        Dim childFrm As frmReserve = New frmReserve
        childFrm.MdiParent = Me
        childFrm.Show()
    End Sub

    Private Sub mnReside_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnReside.Click
        If GetInstanceState("frmReside") Then
            Exit Sub
        End If
        Dim childFrm As frmReside = New frmReside
        childFrm.MdiParent = Me
        childFrm.Show()
    End Sub

    Private Sub mnCash_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnCash.Click
        If GetInstanceState("frmCash") Then
            Exit Sub
        End If
        Dim childFrm As frmCash = New frmCash
        childFrm.MdiParent = Me
        childFrm.Show()
    End Sub
End Class