frmdelmanager.vb

vb。net 2003数据库设计整套源代码

Public Class FrmDelManager
    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

    '窗体重写处置以清理组件列表。
    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 Label12 As System.Windows.Forms.Label
    Friend WithEvents LBManager As System.Windows.Forms.ListBox
    Friend WithEvents BtDel As System.Windows.Forms.Button
    Friend WithEvents BtClose As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.Label12 = New System.Windows.Forms.Label()
        Me.LBManager = New System.Windows.Forms.ListBox()
        Me.BtDel = New System.Windows.Forms.Button()
        Me.BtClose = New System.Windows.Forms.Button()
        Me.SuspendLayout()
        '
        'Label12
        '
        Me.Label12.Location = New System.Drawing.Point(8, 16)
        Me.Label12.Name = "Label12"
        Me.Label12.Size = New System.Drawing.Size(104, 24)
        Me.Label12.TabIndex = 19
        Me.Label12.Text = "已添加用户列表："
        Me.Label12.TextAlign = System.Drawing.ContentAlignment.MiddleLeft
        '
        'LBManager
        '
        Me.LBManager.BackColor = System.Drawing.Color.White
        Me.LBManager.ItemHeight = 12
        Me.LBManager.Location = New System.Drawing.Point(8, 48)
        Me.LBManager.Name = "LBManager"
        Me.LBManager.Size = New System.Drawing.Size(288, 184)
        Me.LBManager.TabIndex = 18
        '
        'BtDel
        '
        Me.BtDel.Location = New System.Drawing.Point(112, 272)
        Me.BtDel.Name = "BtDel"
        Me.BtDel.Size = New System.Drawing.Size(64, 32)
        Me.BtDel.TabIndex = 20
        Me.BtDel.Text = "删除"
        '
        'BtClose
        '
        Me.BtClose.Location = New System.Drawing.Point(208, 272)
        Me.BtClose.Name = "BtClose"
        Me.BtClose.Size = New System.Drawing.Size(64, 32)
        Me.BtClose.TabIndex = 21
        Me.BtClose.Text = "关闭"
        '
        'FrmDelManager
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(304, 326)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.BtClose, Me.BtDel, Me.Label12, Me.LBManager})
        Me.MaximizeBox = False
        Me.Name = "FrmDelManager"
        Me.Text = "删除管理员"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub BtClose_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtClose.Click
        Me.Close()
    End Sub


    Sub LoadManager()
        LBManager.Items.Clear()
        Dim SQLString As String = "SELECT * FROM tbManager"
        'SQL查询语句
        Dim oleconn As New OleDb.OleDbConnection(CONN)
        Dim cmd As New OleDb.OleDbCommand()
        Dim mySelcetCommand As New OleDb.OleDbCommand(SQLString, oleconn)
        mySelcetCommand.Connection.Open()
        Dim myReader As OleDb.OleDbDataReader = mySelcetCommand.ExecuteReader
        While myReader.Read = True
            '读取管理员
            LBManager.Items.Add(myReader.Item("Name"))
        End While
        mySelcetCommand.Connection.Close()
    End Sub

    Private Sub FrmDelManager_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        LoadManager()
    End Sub

    Private Sub BtDel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtDel.Click
        Dim user As String = LBManager.SelectedItem.ToString.Trim
        If LBManager.SelectedItem = "Admin" Then
            MsgBox("不能删除管理员！", MsgBoxStyle.Exclamation, Me.Text)
            Exit Sub
        End If
        Dim SQLString As String = "DELETE FROM tbManager WHERE Name='" & user & "'"
        CommandRecord(SQLString) '执行SQL语句
        LoadManager()
        AddLog("Admin删除了用户：" & user)
        MsgBox("删除操作完成！", , Me.Text)
    End Sub
End Class