adminmaintenance.vb

图书管理系统

Imports System.Data.SqlClient
Public Class AdminMaintenance
    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 TextBox1 As System.Windows.Forms.TextBox
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents TextBox2 As System.Windows.Forms.TextBox
    Friend WithEvents Label3 As System.Windows.Forms.Label
    Friend WithEvents TextBox3 As System.Windows.Forms.TextBox
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents Button2 As System.Windows.Forms.Button
    Friend WithEvents Label4 As System.Windows.Forms.Label
    Friend WithEvents TextBox4 As System.Windows.Forms.TextBox
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.GroupBox1 = New System.Windows.Forms.GroupBox
        Me.TextBox4 = New System.Windows.Forms.TextBox
        Me.Label4 = New System.Windows.Forms.Label
        Me.TextBox3 = New System.Windows.Forms.TextBox
        Me.Label3 = New System.Windows.Forms.Label
        Me.TextBox2 = New System.Windows.Forms.TextBox
        Me.Label2 = New System.Windows.Forms.Label
        Me.TextBox1 = New System.Windows.Forms.TextBox
        Me.Label1 = New System.Windows.Forms.Label
        Me.Button1 = New System.Windows.Forms.Button
        Me.Button2 = New System.Windows.Forms.Button
        Me.GroupBox1.SuspendLayout()
        Me.SuspendLayout()
        '
        'GroupBox1
        '
        Me.GroupBox1.Controls.Add(Me.TextBox4)
        Me.GroupBox1.Controls.Add(Me.Label4)
        Me.GroupBox1.Controls.Add(Me.TextBox3)
        Me.GroupBox1.Controls.Add(Me.Label3)
        Me.GroupBox1.Controls.Add(Me.TextBox2)
        Me.GroupBox1.Controls.Add(Me.Label2)
        Me.GroupBox1.Controls.Add(Me.TextBox1)
        Me.GroupBox1.Controls.Add(Me.Label1)
        Me.GroupBox1.Location = New System.Drawing.Point(32, 32)
        Me.GroupBox1.Name = "GroupBox1"
        Me.GroupBox1.Size = New System.Drawing.Size(344, 208)
        Me.GroupBox1.TabIndex = 0
        Me.GroupBox1.TabStop = False
        Me.GroupBox1.Text = "管理员信息维护"
        '
        'TextBox4
        '
        Me.TextBox4.Location = New System.Drawing.Point(136, 160)
        Me.TextBox4.Name = "TextBox4"
        Me.TextBox4.PasswordChar = Microsoft.VisualBasic.ChrW(42)
        Me.TextBox4.Size = New System.Drawing.Size(176, 21)
        Me.TextBox4.TabIndex = 7
        Me.TextBox4.Text = ""
        '
        'Label4
        '
        Me.Label4.Location = New System.Drawing.Point(24, 160)
        Me.Label4.Name = "Label4"
        Me.Label4.TabIndex = 6
        Me.Label4.Text = "确认新密码"
        '
        'TextBox3
        '
        Me.TextBox3.Location = New System.Drawing.Point(136, 120)
        Me.TextBox3.Name = "TextBox3"
        Me.TextBox3.PasswordChar = Microsoft.VisualBasic.ChrW(42)
        Me.TextBox3.Size = New System.Drawing.Size(176, 21)
        Me.TextBox3.TabIndex = 5
        Me.TextBox3.Text = ""
        '
        'Label3
        '
        Me.Label3.Location = New System.Drawing.Point(24, 120)
        Me.Label3.Name = "Label3"
        Me.Label3.Size = New System.Drawing.Size(96, 23)
        Me.Label3.TabIndex = 4
        Me.Label3.Text = "新  密  码"
        '
        'TextBox2
        '
        Me.TextBox2.Location = New System.Drawing.Point(136, 80)
        Me.TextBox2.Name = "TextBox2"
        Me.TextBox2.PasswordChar = Microsoft.VisualBasic.ChrW(42)
        Me.TextBox2.Size = New System.Drawing.Size(176, 21)
        Me.TextBox2.TabIndex = 3
        Me.TextBox2.Text = ""
        '
        'Label2
        '
        Me.Label2.Location = New System.Drawing.Point(24, 80)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(96, 23)
        Me.Label2.TabIndex = 2
        Me.Label2.Text = "原  密  码"
        '
        'TextBox1
        '
        Me.TextBox1.Location = New System.Drawing.Point(136, 32)
        Me.TextBox1.Name = "TextBox1"
        Me.TextBox1.Size = New System.Drawing.Size(176, 21)
        Me.TextBox1.TabIndex = 1
        Me.TextBox1.Text = ""
        '
        'Label1
        '
        Me.Label1.Location = New System.Drawing.Point(24, 32)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(96, 23)
        Me.Label1.TabIndex = 0
        Me.Label1.Text = "用  户  名"
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(80, 256)
        Me.Button1.Name = "Button1"
        Me.Button1.TabIndex = 1
        Me.Button1.Text = "更新"
        '
        'Button2
        '
        Me.Button2.Location = New System.Drawing.Point(248, 256)
        Me.Button2.Name = "Button2"
        Me.Button2.TabIndex = 2
        Me.Button2.Text = "取消"
        '
        'AdminMaintenance
        '
        Me.AcceptButton = Me.Button1
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.BackColor = System.Drawing.SystemColors.ActiveBorder
        Me.ClientSize = New System.Drawing.Size(408, 301)
        Me.Controls.Add(Me.Button2)
        Me.Controls.Add(Me.Button1)
        Me.Controls.Add(Me.GroupBox1)
        Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog
        Me.MaximizeBox = False
        Me.Name = "AdminMaintenance"
        Me.Text = "管理员信息维护"
        Me.GroupBox1.ResumeLayout(False)
        Me.ResumeLayout(False)

    End Sub

#End Region
    Private Function CheckData() As Boolean
        If TextBox1.Text = "" Or TextBox2.Text = "" Then
            Return False
        End If
        Return True
    End Function

    Private Sub AdminMaintenance_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        TextBox1.Focus()
    End Sub
    Private sqlstr As String
    Private mycom2 As SqlCommand

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        '更新按钮的代码
        If mycon.State = ConnectionState.Closed Then
            mycon.Open()
        End If
        If CheckData() = False Then
            MessageBox.Show("用户名或密码不能为空", "提醒", MessageBoxButtons.OK, MessageBoxIcon.Warning)
            TextBox1.Focus()
            Exit Sub
        End If
        If TextBox3.Text <> TextBox4.Text Then
            MessageBox.Show("新密码确认不一致!", "提醒", MessageBoxButtons.OK, MessageBoxIcon.Warning)
            TextBox3.Focus()
            Exit Sub
        End If
        sqlstr = "Select count(*) From Administrator Where Name='" & TextBox1.Text & "' and Password='" & TextBox2.Text & "'"
        Dim mycom2 As New SqlCommand(sqlstr, mycon)
        Try

            If mycom2.ExecuteScalar() <> 1 Then
                MessageBox.Show("你输入的用户名或密码有误!", "提醒", MessageBoxButtons.OK, MessageBoxIcon.Warning)
                TextBox1.Focus()
                Exit Sub
            End If

            mycon.Close() '确定数据正确性
        Catch ex As Exception
            MessageBox.Show(ex.Message)
        End Try

        If mycon.State = ConnectionState.Closed Then
            mycon.Open()
        End If
        sqlstr = "update Administrator Set Password='" & TextBox3.Text & "' Where Name='" & TextBox1.Text & "'"
        Try
            mycom2 = New SqlCommand(sqlstr, mycon)
            mycom2.ExecuteNonQuery()
            MessageBox.Show("更新成功!", "恭喜", MessageBoxButtons.OK, MessageBoxIcon.Information)
        Catch ex As Exception
            MessageBox.Show(ex.Message)
        End Try
        mycon.Close()
    End Sub

    '  Private Sub TextBox2_LostFocus(ByVal sender As Object, ByVal e As System.EventArgs) Handles TextBox2.LostFocus
    '     If mycon.State = ConnectionState.Closed Then
    '        mycon.Open()
    '   End If
    '  If CheckData() = False Then
    '     MessageBox.Show("用户名或密码不能为空", "提醒", MessageBoxButtons.OK, MessageBoxIcon.Warning)
    '    TextBox1.Focus()
    '   Exit Sub
    ' End If
    ' sqlstr = "Select count(*) From Administrator Where Name='" & TextBox1.Text & "' and Password='" & TextBox2.Text & "'"
    ' Dim mycom2 As New SqlCommand(sqlstr, mycon)
    ' Try

    '   If mycom2.ExecuteScalar() <> 1 Then
    '            MessageBox.Show("你输入的用户名或密码有误!", "提醒", MessageBoxButtons.OK, MessageBoxIcon.Warning)
    '      TextBox1.Focus()
    '     Exit Sub
    ' End If

    'mycon.Close() '确定数据正确性
    'Catch ex As Exception
    '   MessageBox.Show(ex.Message)
    ' End Try
    ' End Sub

    '  Private Sub TextBox4_LostFocus(ByVal sender As Object, ByVal e As System.EventArgs) Handles TextBox4.LostFocus
    '     If TextBox3.Text = "" Then
    '        MessageBox.Show("新密码不能为空", "提醒", MessageBoxButtons.OK, MessageBoxIcon.Warning)
    '       TextBox3.Focus()
    '      Exit Sub
    '  End If
    ' If TextBox3.Text <> TextBox4.Text Then
    '    MessageBox.Show("新密码与确认密码不一致!", "提醒", MessageBoxButtons.OK, MessageBoxIcon.Warning)
    '   TextBox3.Text = ""
    '  TextBox4.Text = ""
    ' TextBox3.Focus()
    ' Exit Sub
    'End If
    '   End Sub

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