修改密码.vb

这是个用VB编写的机票销售与查询管理系统

Imports System.Data
Imports System.Data.SqlClient
Public Class 修改密码
    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 Label1 As System.Windows.Forms.Label
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents Label3 As System.Windows.Forms.Label
    Friend WithEvents Label4 As System.Windows.Forms.Label
    Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
    Friend WithEvents TextBox2 As System.Windows.Forms.TextBox
    Friend WithEvents TextBox3 As System.Windows.Forms.TextBox
    Friend WithEvents TextBox4 As System.Windows.Forms.TextBox
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents Button2 As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.Label1 = New System.Windows.Forms.Label
        Me.Label2 = New System.Windows.Forms.Label
        Me.Label3 = New System.Windows.Forms.Label
        Me.Label4 = New System.Windows.Forms.Label
        Me.TextBox1 = New System.Windows.Forms.TextBox
        Me.TextBox2 = New System.Windows.Forms.TextBox
        Me.TextBox3 = New System.Windows.Forms.TextBox
        Me.TextBox4 = New System.Windows.Forms.TextBox
        Me.Button1 = New System.Windows.Forms.Button
        Me.Button2 = New System.Windows.Forms.Button
        Me.SuspendLayout()
        '
        'Label1
        '
        Me.Label1.Location = New System.Drawing.Point(32, 32)
        Me.Label1.Name = "Label1"
        Me.Label1.TabIndex = 0
        Me.Label1.Text = "用户名"
        '
        'Label2
        '
        Me.Label2.Location = New System.Drawing.Point(24, 80)
        Me.Label2.Name = "Label2"
        Me.Label2.TabIndex = 1
        Me.Label2.Text = "原密码"
        '
        'Label3
        '
        Me.Label3.Location = New System.Drawing.Point(24, 120)
        Me.Label3.Name = "Label3"
        Me.Label3.TabIndex = 2
        Me.Label3.Text = "新密码"
        '
        'Label4
        '
        Me.Label4.Location = New System.Drawing.Point(24, 168)
        Me.Label4.Name = "Label4"
        Me.Label4.TabIndex = 3
        Me.Label4.Text = "确认密码"
        '
        'TextBox1
        '
        Me.TextBox1.Location = New System.Drawing.Point(176, 24)
        Me.TextBox1.Name = "TextBox1"
        Me.TextBox1.TabIndex = 4
        Me.TextBox1.Text = ""
        '
        'TextBox2
        '
        Me.TextBox2.Location = New System.Drawing.Point(176, 80)
        Me.TextBox2.Name = "TextBox2"
        Me.TextBox2.PasswordChar = Microsoft.VisualBasic.ChrW(42)
        Me.TextBox2.TabIndex = 5
        Me.TextBox2.Text = ""
        '
        'TextBox3
        '
        Me.TextBox3.Location = New System.Drawing.Point(176, 120)
        Me.TextBox3.Name = "TextBox3"
        Me.TextBox3.PasswordChar = Microsoft.VisualBasic.ChrW(42)
        Me.TextBox3.TabIndex = 6
        Me.TextBox3.Text = ""
        '
        'TextBox4
        '
        Me.TextBox4.Location = New System.Drawing.Point(176, 168)
        Me.TextBox4.Name = "TextBox4"
        Me.TextBox4.PasswordChar = Microsoft.VisualBasic.ChrW(42)
        Me.TextBox4.TabIndex = 7
        Me.TextBox4.Text = ""
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(32, 224)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(88, 32)
        Me.Button1.TabIndex = 8
        Me.Button1.Text = "确认"
        '
        'Button2
        '
        Me.Button2.Location = New System.Drawing.Point(184, 224)
        Me.Button2.Name = "Button2"
        Me.Button2.Size = New System.Drawing.Size(88, 32)
        Me.Button2.TabIndex = 9
        Me.Button2.Text = "取消"
        '
        '修改密码
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(344, 286)
        Me.Controls.Add(Me.Button2)
        Me.Controls.Add(Me.Button1)
        Me.Controls.Add(Me.TextBox4)
        Me.Controls.Add(Me.TextBox3)
        Me.Controls.Add(Me.TextBox2)
        Me.Controls.Add(Me.TextBox1)
        Me.Controls.Add(Me.Label4)
        Me.Controls.Add(Me.Label3)
        Me.Controls.Add(Me.Label2)
        Me.Controls.Add(Me.Label1)
        Me.Name = "修改密码"
        Me.Text = "修改密码"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim con As String
        Dim user As String
        Dim pw, pw1, pw2 As String
        Dim ds As New DataSet
        Dim signe As Integer = 1
        Dim count As Integer
        user = TextBox1.Text
        pw = TextBox2.Text
        pw1 = TextBox3.Text
        pw2 = TextBox4.Text
        con = "select * from users where id='" + TextBox1.Text + "'"
        ds = my_class.query(con)
        If (ds.Tables(0).Rows.Count) Then
            If (TextBox3.Text <> TextBox4.Text) Then
                MessageBox.Show("请重新确认密码", "警告")
                TextBox3.SelectAll()
                TextBox3.Focus()
                TextBox4.Clear()
                signe = 0
            End If
            If Trim(TextBox1.Text) = "" Then
                MsgBox("用户名不能为空！")
                TextBox1.Focus()
                TextBox2.Clear()
                TextBox3.Clear()
                TextBox4.Clear()
            ElseIf (signe = 1) Then
                con = "update  users set password='" + pw2 + "' where id='" + user + "'"
                my_class.update(con)
                MsgBox("修改成功！")
            End If
        Else
            MsgBox("不存在该用户！")
            TextBox1.Focus()

        End If
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Me.Close()
    End Sub

    Private Sub 修改密码_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        ct = 0
        my_class.init()
    End Sub

    Private Sub 修改密码_Activated(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Activated
        Dim mdifrm As New MDIForm1
        mdifrm = Me.MdiParent
        mdifrm.StatusBar1.Panels(0).Text = Me.Text
    End Sub
End Class