frmstatus.vb

采用VB编写的机房管理系统

Public Class FrmStatus
    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 ListView1 As System.Windows.Forms.ListView
    Friend WithEvents BtCancel As System.Windows.Forms.Button
    Friend WithEvents ColumnHeader1 As System.Windows.Forms.ColumnHeader
    Friend WithEvents ColumnHeader2 As System.Windows.Forms.ColumnHeader
    Friend WithEvents ColumnHeader3 As System.Windows.Forms.ColumnHeader
    Friend WithEvents LbStatus As System.Windows.Forms.Label
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.ListView1 = New System.Windows.Forms.ListView
        Me.ColumnHeader1 = New System.Windows.Forms.ColumnHeader
        Me.ColumnHeader2 = New System.Windows.Forms.ColumnHeader
        Me.ColumnHeader3 = New System.Windows.Forms.ColumnHeader
        Me.BtCancel = New System.Windows.Forms.Button
        Me.LbStatus = New System.Windows.Forms.Label
        Me.SuspendLayout()
        '
        'ListView1
        '
        Me.ListView1.Columns.AddRange(New System.Windows.Forms.ColumnHeader() {Me.ColumnHeader1, Me.ColumnHeader2, Me.ColumnHeader3})
        Me.ListView1.Location = New System.Drawing.Point(32, 64)
        Me.ListView1.Name = "ListView1"
        Me.ListView1.Size = New System.Drawing.Size(296, 216)
        Me.ListView1.TabIndex = 0
        '
        'ColumnHeader1
        '
        Me.ColumnHeader1.Text = "编号"
        Me.ColumnHeader1.Width = 100
        '
        'ColumnHeader2
        '
        Me.ColumnHeader2.Text = "用户名"
        Me.ColumnHeader2.Width = 120
        '
        'ColumnHeader3
        '
        Me.ColumnHeader3.Text = "登陆时间"
        Me.ColumnHeader3.Width = 300
        '
        'BtCancel
        '
        Me.BtCancel.Location = New System.Drawing.Point(240, 304)
        Me.BtCancel.Name = "BtCancel"
        Me.BtCancel.Size = New System.Drawing.Size(80, 32)
        Me.BtCancel.TabIndex = 1
        Me.BtCancel.Text = "取消"
        '
        'LbStatus
        '
        Me.LbStatus.Location = New System.Drawing.Point(32, 24)
        Me.LbStatus.Name = "LbStatus"
        Me.LbStatus.Size = New System.Drawing.Size(104, 24)
        Me.LbStatus.TabIndex = 2
        '
        'FrmStatus
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(376, 366)
        Me.Controls.Add(Me.LbStatus)
        Me.Controls.Add(Me.BtCancel)
        Me.Controls.Add(Me.ListView1)
        Me.MaximizeBox = False
        Me.Name = "FrmStatus"
        Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
        Me.Text = "当前状态"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub BtCancel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtCancel.Click
        Me.Finalize()
    End Sub

    Private Sub FrmStatus_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Dim sqlstring As String
        sqlstring = " select IDOrder,UserName,LoginTime from tbUser where OnLine=1"

        Dim objectdsdataset As New DataSet
        Dim oleconn As New OleDb.OleDbConnection(CONN)
        Dim adapter As New OleDb.OleDbDataAdapter
        adapter.TableMappings.Add("Table", "Log")
        Dim cmd As OleDb.OleDbCommand = New OleDb.OleDbCommand(sqlstring, oleconn)
        cmd.CommandType = CommandType.Text
        adapter.SelectCommand = cmd


        If oleconn.State <> ConnectionState.Open Then
            oleconn.Open()
        End If

        cmd.ExecuteNonQuery()

        If oleconn.State <> ConnectionState.Closed Then
            oleconn.Close()
        End If

        adapter.Fill(objectdsdataset)

        LbStatus.Text = "目前有" & objectdsdataset.Tables("Log").Rows.Count.ToString & "正在使用计算机"

        Dim orow As DataRow
        Dim otable As DataTable
        otable = objectdsdataset.Tables("Log")
        Dim litem As ListViewItem



    End Sub
End Class