changepwd.vb

教务管理系统：学生成绩管理

Imports System.Data.SqlClient

Public Class ChangePwd
    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 Label2 As System.Windows.Forms.Label
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents Label3 As System.Windows.Forms.Label
    Friend WithEvents Label4 As System.Windows.Forms.Label
    Friend WithEvents tbpwd As System.Windows.Forms.TextBox
    Friend WithEvents tbname As System.Windows.Forms.TextBox
    Friend WithEvents tbpwd_new1 As System.Windows.Forms.TextBox
    Friend WithEvents tbpwd_new2 As System.Windows.Forms.TextBox
    Friend WithEvents btok As System.Windows.Forms.Button
    Friend WithEvents btcancel As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.tbpwd = New System.Windows.Forms.TextBox
        Me.tbname = New System.Windows.Forms.TextBox
        Me.Label2 = New System.Windows.Forms.Label
        Me.Label1 = New System.Windows.Forms.Label
        Me.tbpwd_new1 = New System.Windows.Forms.TextBox
        Me.Label3 = New System.Windows.Forms.Label
        Me.Label4 = New System.Windows.Forms.Label
        Me.tbpwd_new2 = New System.Windows.Forms.TextBox
        Me.btok = New System.Windows.Forms.Button
        Me.btcancel = New System.Windows.Forms.Button
        Me.SuspendLayout()
        '
        'tbpwd
        '
        Me.tbpwd.Location = New System.Drawing.Point(152, 40)
        Me.tbpwd.Name = "tbpwd"
        Me.tbpwd.PasswordChar = Microsoft.VisualBasic.ChrW(42)
        Me.tbpwd.Size = New System.Drawing.Size(120, 21)
        Me.tbpwd.TabIndex = 7
        Me.tbpwd.Text = ""
        '
        'tbname
        '
        Me.tbname.Location = New System.Drawing.Point(24, 40)
        Me.tbname.Name = "tbname"
        Me.tbname.TabIndex = 6
        Me.tbname.Text = ""
        '
        'Label2
        '
        Me.Label2.Location = New System.Drawing.Point(152, 16)
        Me.Label2.Name = "Label2"
        Me.Label2.TabIndex = 5
        Me.Label2.Text = "密码"
        '
        'Label1
        '
        Me.Label1.Location = New System.Drawing.Point(24, 16)
        Me.Label1.Name = "Label1"
        Me.Label1.TabIndex = 4
        Me.Label1.Text = "用户名"
        '
        'tbpwd_new1
        '
        Me.tbpwd_new1.Location = New System.Drawing.Point(24, 104)
        Me.tbpwd_new1.Name = "tbpwd_new1"
        Me.tbpwd_new1.PasswordChar = Microsoft.VisualBasic.ChrW(42)
        Me.tbpwd_new1.Size = New System.Drawing.Size(120, 21)
        Me.tbpwd_new1.TabIndex = 8
        Me.tbpwd_new1.Text = ""
        '
        'Label3
        '
        Me.Label3.Location = New System.Drawing.Point(24, 72)
        Me.Label3.Name = "Label3"
        Me.Label3.TabIndex = 9
        Me.Label3.Text = "新密码"
        '
        'Label4
        '
        Me.Label4.Location = New System.Drawing.Point(152, 72)
        Me.Label4.Name = "Label4"
        Me.Label4.TabIndex = 10
        Me.Label4.Text = "确认新密码"
        '
        'tbpwd_new2
        '
        Me.tbpwd_new2.Location = New System.Drawing.Point(152, 104)
        Me.tbpwd_new2.Name = "tbpwd_new2"
        Me.tbpwd_new2.PasswordChar = Microsoft.VisualBasic.ChrW(42)
        Me.tbpwd_new2.Size = New System.Drawing.Size(120, 21)
        Me.tbpwd_new2.TabIndex = 11
        Me.tbpwd_new2.Text = ""
        '
        'btok
        '
        Me.btok.Location = New System.Drawing.Point(120, 144)
        Me.btok.Name = "btok"
        Me.btok.TabIndex = 12
        Me.btok.Text = "确认"
        '
        'btcancel
        '
        Me.btcancel.DialogResult = System.Windows.Forms.DialogResult.Cancel
        Me.btcancel.Location = New System.Drawing.Point(200, 144)
        Me.btcancel.Name = "btcancel"
        Me.btcancel.TabIndex = 13
        Me.btcancel.Text = "取消"
        '
        'ChangePwd
        '
        Me.AcceptButton = Me.btok
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.CancelButton = Me.btcancel
        Me.ClientSize = New System.Drawing.Size(292, 189)
        Me.Controls.Add(Me.btcancel)
        Me.Controls.Add(Me.btok)
        Me.Controls.Add(Me.tbpwd_new2)
        Me.Controls.Add(Me.tbpwd_new1)
        Me.Controls.Add(Me.tbpwd)
        Me.Controls.Add(Me.tbname)
        Me.Controls.Add(Me.Label4)
        Me.Controls.Add(Me.Label3)
        Me.Controls.Add(Me.Label2)
        Me.Controls.Add(Me.Label1)
        Me.Name = "ChangePwd"
        Me.Text = "修改密码"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub btok_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btok.Click
        If Me.tbname.Text.Trim = String.Empty Then
            MessageBox.Show("姓名不能为空")
            Me.tbname.Focus()
        ElseIf Me.tbpwd.Text.Trim = String.Empty Then
            MessageBox.Show("密码不能为空")
            Me.tbpwd.Focus()
        ElseIf Me.tbpwd_new1.Text.Trim() <> Me.tbpwd_new2.Text.Trim() Then
            MessageBox.Show("新密码不一致")
            Me.tbpwd_new1.Focus()
        ElseIf Me.tbpwd_new1.Text.Trim = String.Empty Then
            MessageBox.Show("新密码不能为空")
            Me.tbpwd_new1.Focus()
        Else
            Try
                Dim Sql As String = "SELECT * FROM USERINFO WHERE USERID = '" + Me.tbname.Text.Trim() + "'"
                If GetDataTable(Sql).Rows.Count = 0 Then
                    MessageBox.Show("用户不存在")
                    Me.tbname.Focus()
                ElseIf GetDataTable(Sql + " AND USERPWD = '" + Me.tbpwd.Text.Trim() + "'").Rows.Count = 0 Then
                    MessageBox.Show("密码不正确")
                    Me.tbpwd.Focus()
                Else
                    Dim SqlCmd As New SqlCommand
                    Sql = "UPDATE USERINFO SET USERPWD = '" + Me.tbpwd_new1.Text.Trim() + "' WHERE USERID = '" + Me.tbname.Text.Trim() + "'"
                    SqlCmd.Connection = SqlCon
                    SqlCmd.CommandText = Sql
                    Try
                        SqlCon.Open()
                        SqlCmd.ExecuteNonQuery()
                        MessageBox.Show("密码修改成功")
                    Catch ex As Exception
                        MessageBox.Show("密码修改失败")
                        WriteErr(ex)

                    Finally
                        SqlCon.Close()
                        Me.Close()
                    End Try
                End If
            Catch ex As Exception
                WriteErr(ex)
            End Try
        End If
    End Sub

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

End Class