modifypassword.vb

这是一个完善的图书馆管理系统.后台数据库采用ACCESS.

Public Class frmModifyPassword
    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 GroupBox1 As System.Windows.Forms.GroupBox
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents txtOldPass As System.Windows.Forms.TextBox
    Friend WithEvents txtNewPass As System.Windows.Forms.TextBox
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents txtConfirmPass As System.Windows.Forms.TextBox
    Friend WithEvents Label3 As System.Windows.Forms.Label
    Friend WithEvents btnModify As System.Windows.Forms.Button
    Friend WithEvents btnClose As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.GroupBox1 = New System.Windows.Forms.GroupBox
        Me.txtOldPass = New System.Windows.Forms.TextBox
        Me.Label1 = New System.Windows.Forms.Label
        Me.txtNewPass = New System.Windows.Forms.TextBox
        Me.Label2 = New System.Windows.Forms.Label
        Me.txtConfirmPass = New System.Windows.Forms.TextBox
        Me.Label3 = New System.Windows.Forms.Label
        Me.btnModify = New System.Windows.Forms.Button
        Me.btnClose = New System.Windows.Forms.Button
        Me.GroupBox1.SuspendLayout()
        Me.SuspendLayout()
        '
        'GroupBox1
        '
        Me.GroupBox1.Controls.Add(Me.txtOldPass)
        Me.GroupBox1.Controls.Add(Me.Label1)
        Me.GroupBox1.Controls.Add(Me.txtNewPass)
        Me.GroupBox1.Controls.Add(Me.Label2)
        Me.GroupBox1.Controls.Add(Me.txtConfirmPass)
        Me.GroupBox1.Controls.Add(Me.Label3)
        Me.GroupBox1.Location = New System.Drawing.Point(16, 16)
        Me.GroupBox1.Name = "GroupBox1"
        Me.GroupBox1.Size = New System.Drawing.Size(224, 152)
        Me.GroupBox1.TabIndex = 0
        Me.GroupBox1.TabStop = False
        Me.GroupBox1.Text = "修改密码"
        '
        'txtOldPass
        '
        Me.txtOldPass.Location = New System.Drawing.Point(72, 32)
        Me.txtOldPass.Name = "txtOldPass"
        Me.txtOldPass.PasswordChar = Microsoft.VisualBasic.ChrW(42)
        Me.txtOldPass.Size = New System.Drawing.Size(128, 21)
        Me.txtOldPass.TabIndex = 0
        Me.txtOldPass.Text = ""
        '
        'Label1
        '
        Me.Label1.Location = New System.Drawing.Point(8, 32)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(56, 23)
        Me.Label1.TabIndex = 0
        Me.Label1.Text = "旧密码"
        '
        'txtNewPass
        '
        Me.txtNewPass.Location = New System.Drawing.Point(72, 72)
        Me.txtNewPass.Name = "txtNewPass"
        Me.txtNewPass.PasswordChar = Microsoft.VisualBasic.ChrW(42)
        Me.txtNewPass.Size = New System.Drawing.Size(128, 21)
        Me.txtNewPass.TabIndex = 1
        Me.txtNewPass.Text = ""
        '
        'Label2
        '
        Me.Label2.Location = New System.Drawing.Point(8, 72)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(56, 23)
        Me.Label2.TabIndex = 0
        Me.Label2.Text = "新密码"
        '
        'txtConfirmPass
        '
        Me.txtConfirmPass.Location = New System.Drawing.Point(72, 112)
        Me.txtConfirmPass.Name = "txtConfirmPass"
        Me.txtConfirmPass.PasswordChar = Microsoft.VisualBasic.ChrW(42)
        Me.txtConfirmPass.Size = New System.Drawing.Size(128, 21)
        Me.txtConfirmPass.TabIndex = 2
        Me.txtConfirmPass.Text = ""
        '
        'Label3
        '
        Me.Label3.Location = New System.Drawing.Point(8, 112)
        Me.Label3.Name = "Label3"
        Me.Label3.Size = New System.Drawing.Size(56, 23)
        Me.Label3.TabIndex = 0
        Me.Label3.Text = "确认"
        '
        'btnModify
        '
        Me.btnModify.Location = New System.Drawing.Point(16, 184)
        Me.btnModify.Name = "btnModify"
        Me.btnModify.Size = New System.Drawing.Size(56, 32)
        Me.btnModify.TabIndex = 1
        Me.btnModify.Text = "修改"
        '
        'btnClose
        '
        Me.btnClose.DialogResult = System.Windows.Forms.DialogResult.Cancel
        Me.btnClose.Location = New System.Drawing.Point(184, 184)
        Me.btnClose.Name = "btnClose"
        Me.btnClose.Size = New System.Drawing.Size(56, 32)
        Me.btnClose.TabIndex = 2
        Me.btnClose.Text = "关闭"
        '
        'frmModifyPassword
        '
        Me.AcceptButton = Me.btnModify
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.CancelButton = Me.btnClose
        Me.ClientSize = New System.Drawing.Size(256, 221)
        Me.Controls.Add(Me.btnModify)
        Me.Controls.Add(Me.GroupBox1)
        Me.Controls.Add(Me.btnClose)
        Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog
        Me.MaximizeBox = False
        Me.Name = "frmModifyPassword"
        Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
        Me.Text = "登录密码修改"
        Me.GroupBox1.ResumeLayout(False)
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub btnModify_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnModify.Click
        If txtOldPass.Text <> Password Then
            MsgBox("密码错误")
            txtOldPass.Text = ""
            txtNewPass.Text = ""
            txtConfirmPass.Text = ""
            txtOldPass.Focus()
        ElseIf txtNewPass.Text <> txtConfirmPass.Text Then
            MsgBox("两次密码不一致，请重新输入新密码")
            txtNewPass.Text = ""
            txtConfirmPass.Text = ""
            txtNewPass.Focus()
        Else
            Try
                Dim str As String = "update 管理员 set logpwd='" & txtNewPass.Text & _
                    "' where logname='" & UserName & "'"
                If OleConn.UpdateQuery(str) Then
                    MsgBox("修改密码成功")
                    Password = txtNewPass.Text
                    txtOldPass.Text = ""
                    txtNewPass.Text = ""
                    txtConfirmPass.Text = ""
                    txtOldPass.Focus()
                Else
                    MsgBox("修改密码失败")
                End If
            Catch ex As Exception
                OleConn.DisplayError(ex)
            End Try
        End If
    End Sub
End Class