admin_addadmin.vb

图书馆管理系统,是数据库的课程设计,报告里面包含了需求分析数据字典概念结构设计逻辑结构设计数据库物理设计数据库实施

Imports System.Data
'引入数据库操作类命名空间
Imports System.Data.OleDb
'引入ADO.NET操作命名空间

Public Class win_addadmin
    Inherits System.Windows.Forms.Form
    Dim sqlstr As String 'SQL语句标记
    Dim objDS As DataSet '数据在内存中的缓存

#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 Label1 As System.Windows.Forms.Label
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents Label3 As System.Windows.Forms.Label
    Friend WithEvents tbnewname As System.Windows.Forms.TextBox
    Friend WithEvents tbnewpassword As System.Windows.Forms.TextBox
    Friend WithEvents tbConfirmpw As System.Windows.Forms.TextBox
    Friend WithEvents btOK As System.Windows.Forms.Button
    Friend WithEvents btreset As System.Windows.Forms.Button
    Friend WithEvents btcancel As System.Windows.Forms.Button
    Friend WithEvents Label4 As System.Windows.Forms.Label
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Dim resources As System.Resources.ResourceManager = New System.Resources.ResourceManager(GetType(win_addadmin))
        Me.GroupBox1 = New System.Windows.Forms.GroupBox
        Me.Label4 = New System.Windows.Forms.Label
        Me.btcancel = New System.Windows.Forms.Button
        Me.btreset = New System.Windows.Forms.Button
        Me.btOK = New System.Windows.Forms.Button
        Me.tbConfirmpw = New System.Windows.Forms.TextBox
        Me.tbnewpassword = New System.Windows.Forms.TextBox
        Me.tbnewname = New System.Windows.Forms.TextBox
        Me.Label3 = New System.Windows.Forms.Label
        Me.Label2 = New System.Windows.Forms.Label
        Me.Label1 = New System.Windows.Forms.Label
        Me.GroupBox1.SuspendLayout()
        Me.SuspendLayout()
        '
        'GroupBox1
        '
        Me.GroupBox1.Controls.Add(Me.Label4)
        Me.GroupBox1.Controls.Add(Me.btcancel)
        Me.GroupBox1.Controls.Add(Me.btreset)
        Me.GroupBox1.Controls.Add(Me.btOK)
        Me.GroupBox1.Controls.Add(Me.tbConfirmpw)
        Me.GroupBox1.Controls.Add(Me.tbnewpassword)
        Me.GroupBox1.Controls.Add(Me.tbnewname)
        Me.GroupBox1.Controls.Add(Me.Label3)
        Me.GroupBox1.Controls.Add(Me.Label2)
        Me.GroupBox1.Controls.Add(Me.Label1)
        Me.GroupBox1.ForeColor = System.Drawing.SystemColors.ControlDark
        Me.GroupBox1.Location = New System.Drawing.Point(4, 2)
        Me.GroupBox1.Name = "GroupBox1"
        Me.GroupBox1.Size = New System.Drawing.Size(280, 152)
        Me.GroupBox1.TabIndex = 0
        Me.GroupBox1.TabStop = False
        Me.GroupBox1.Text = "添加管理员"
        '
        'Label4
        '
        Me.Label4.Location = New System.Drawing.Point(48, 96)
        Me.Label4.Name = "Label4"
        Me.Label4.Size = New System.Drawing.Size(200, 16)
        Me.Label4.TabIndex = 9
        Me.Label4.Text = "系统自动过滤 ' "" + & | 字符"
        Me.Label4.TextAlign = System.Drawing.ContentAlignment.MiddleCenter
        Me.Label4.UseMnemonic = False
        '
        'btcancel
        '
        Me.btcancel.DialogResult = System.Windows.Forms.DialogResult.Cancel
        Me.btcancel.ForeColor = System.Drawing.SystemColors.ControlText
        Me.btcancel.Location = New System.Drawing.Point(184, 120)
        Me.btcancel.Name = "btcancel"
        Me.btcancel.Size = New System.Drawing.Size(56, 24)
        Me.btcancel.TabIndex = 6
        Me.btcancel.Text = "关闭"
        '
        'btreset
        '
        Me.btreset.ForeColor = System.Drawing.SystemColors.ControlText
        Me.btreset.Location = New System.Drawing.Point(112, 120)
        Me.btreset.Name = "btreset"
        Me.btreset.Size = New System.Drawing.Size(56, 24)
        Me.btreset.TabIndex = 5
        Me.btreset.Text = "重置"
        '
        'btOK
        '
        Me.btOK.ForeColor = System.Drawing.SystemColors.ControlText
        Me.btOK.Location = New System.Drawing.Point(40, 120)
        Me.btOK.Name = "btOK"
        Me.btOK.Size = New System.Drawing.Size(56, 24)
        Me.btOK.TabIndex = 4
        Me.btOK.Text = "确定"
        '
        'tbConfirmpw
        '
        Me.tbConfirmpw.Location = New System.Drawing.Point(136, 72)
        Me.tbConfirmpw.MaxLength = 10
        Me.tbConfirmpw.Name = "tbConfirmpw"
        Me.tbConfirmpw.PasswordChar = Microsoft.VisualBasic.ChrW(42)
        Me.tbConfirmpw.Size = New System.Drawing.Size(88, 21)
        Me.tbConfirmpw.TabIndex = 3
        Me.tbConfirmpw.Text = ""
        '
        'tbnewpassword
        '
        Me.tbnewpassword.Location = New System.Drawing.Point(136, 48)
        Me.tbnewpassword.MaxLength = 10
        Me.tbnewpassword.Name = "tbnewpassword"
        Me.tbnewpassword.PasswordChar = Microsoft.VisualBasic.ChrW(42)
        Me.tbnewpassword.Size = New System.Drawing.Size(88, 21)
        Me.tbnewpassword.TabIndex = 2
        Me.tbnewpassword.Text = ""
        '
        'tbnewname
        '
        Me.tbnewname.Location = New System.Drawing.Point(136, 16)
        Me.tbnewname.MaxLength = 10
        Me.tbnewname.Name = "tbnewname"
        Me.tbnewname.Size = New System.Drawing.Size(88, 21)
        Me.tbnewname.TabIndex = 1
        Me.tbnewname.Text = ""
        '
        'Label3
        '
        Me.Label3.ForeColor = System.Drawing.SystemColors.ControlText
        Me.Label3.Location = New System.Drawing.Point(64, 72)
        Me.Label3.Name = "Label3"
        Me.Label3.Size = New System.Drawing.Size(72, 24)
        Me.Label3.TabIndex = 2
        Me.Label3.Text = "确定密码："
        Me.Label3.TextAlign = System.Drawing.ContentAlignment.MiddleRight
        '
        'Label2
        '
        Me.Label2.ForeColor = System.Drawing.SystemColors.ControlText
        Me.Label2.Location = New System.Drawing.Point(64, 48)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(72, 24)
        Me.Label2.TabIndex = 1
        Me.Label2.Text = "新密码："
        Me.Label2.TextAlign = System.Drawing.ContentAlignment.MiddleRight
        '
        'Label1
        '
        Me.Label1.ForeColor = System.Drawing.SystemColors.ControlText
        Me.Label1.Location = New System.Drawing.Point(64, 16)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(72, 24)
        Me.Label1.TabIndex = 0
        Me.Label1.Text = "登陆帐号："
        Me.Label1.TextAlign = System.Drawing.ContentAlignment.MiddleRight
        '
        'win_addadmin
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.CancelButton = Me.btcancel
        Me.ClientSize = New System.Drawing.Size(288, 157)
        Me.Controls.Add(Me.GroupBox1)
        Me.Icon = CType(resources.GetObject("$this.Icon"), System.Drawing.Icon)
        Me.MaximizeBox = False
        Me.MaximumSize = New System.Drawing.Size(296, 184)
        Me.MinimumSize = New System.Drawing.Size(296, 184)
        Me.Name = "win_addadmin"
        Me.ShowInTaskbar = False
        Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
        Me.Text = "图书馆管理系统--添加管理员"
        Me.GroupBox1.ResumeLayout(False)
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub btreset_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btreset.Click
        tbnewname.Text = ""
        tbnewpassword.Text = ""
        tbConfirmpw.Text = ""
    End Sub

    Private Sub btcancel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btcancel.Click
        Close()
    End Sub

    Private Sub btOK_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btOK.Click
        Dim canupdate As Boolean = True, newname As String, newpassword As String, confirmpw As String
        newname = filter(Trim(tbnewname.Text).ToString)
        newpassword = filter(Trim(tbnewpassword.Text).ToString)
        confirmpw = filter(Trim(tbConfirmpw.Text).ToString)
        If newname = "" Then
            MessageBox.Show("管理员新帐号不能有空!", "错误", MessageBoxButtons.OK, MessageBoxIcon.Information)
            tbnewname.Focus()
            canupdate = False
        ElseIf newpassword = "" Then
            MessageBox.Show("管理员新密码不能有空!", "错误", MessageBoxButtons.OK, MessageBoxIcon.Information)
            tbnewpassword.Focus()
            canupdate = False
        ElseIf confirmpw = "" Then
            MessageBox.Show("管理员确定密码不能有空!", "错误", MessageBoxButtons.OK, MessageBoxIcon.Information)
            tbConfirmpw.Focus()
            canupdate = False
        ElseIf newpassword <> confirmpw Then
            MessageBox.Show("两密码不一致!", "错误", MessageBoxButtons.OK, MessageBoxIcon.Information)
            tbnewpassword.Focus()
            canupdate = False
        End If

        sqlstr = "select * from admininfo where adminname = '" & newname & "'" '判断新输入的帐号是否存在
        objDS = GetData(sqlstr)
        If objDS.Tables(0).Rows.Count > 0 Then '帐号已经存在
            MessageBox.Show("管理员帐号已存在!", "错误", MessageBoxButtons.OK, MessageBoxIcon.Information)
            tbnewname.Focus()
            tbnewname.Text = ""
            canupdate = False
        End If

        If canupdate Then '没有错误
            Try
                sqlstr = "insert into admininfo(adminname,lpassword) values('" & newname & "','" & newpassword & "')"
                objDS = GetData(sqlstr)
                Me.Close()
                MessageBox.Show("添加管理员成功", "数据更新成功", MessageBoxButtons.OK, MessageBoxIcon.Information)
            Catch
                MsgBox("更新数据库错误。", MsgBoxStyle.Information + MsgBoxStyle.OKOnly, "错误")
            End Try
        End If
    End Sub
End Class