管理员管理.vb

图书管理系统 万千可以用于小规模的图书管理拉 用access作为数据库

Imports System.Data
Imports System.Data.OleDb
Public Class 管理员管理
    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 MainMenu1 As System.Windows.Forms.MainMenu
    Friend WithEvents MenuItem1 As System.Windows.Forms.MenuItem
    Friend WithEvents MenuItem2 As System.Windows.Forms.MenuItem
    Friend WithEvents MenuItem3 As System.Windows.Forms.MenuItem
    Friend WithEvents GroupBox1 As System.Windows.Forms.GroupBox
    Friend WithEvents Button2 As System.Windows.Forms.Button
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents TextBox2 As System.Windows.Forms.TextBox
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents GroupBox2 As System.Windows.Forms.GroupBox
    Friend WithEvents DataGrid1 As System.Windows.Forms.DataGrid
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.MainMenu1 = New System.Windows.Forms.MainMenu
        Me.MenuItem1 = New System.Windows.Forms.MenuItem
        Me.MenuItem2 = New System.Windows.Forms.MenuItem
        Me.MenuItem3 = New System.Windows.Forms.MenuItem
        Me.GroupBox1 = New System.Windows.Forms.GroupBox
        Me.Button2 = New System.Windows.Forms.Button
        Me.Button1 = New System.Windows.Forms.Button
        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.GroupBox2 = New System.Windows.Forms.GroupBox
        Me.DataGrid1 = New System.Windows.Forms.DataGrid
        Me.GroupBox1.SuspendLayout()
        Me.GroupBox2.SuspendLayout()
        CType(Me.DataGrid1, System.ComponentModel.ISupportInitialize).BeginInit()
        Me.SuspendLayout()
        '
        'MainMenu1
        '
        Me.MainMenu1.MenuItems.AddRange(New System.Windows.Forms.MenuItem() {Me.MenuItem1, Me.MenuItem3})
        '
        'MenuItem1
        '
        Me.MenuItem1.Index = 0
        Me.MenuItem1.MenuItems.AddRange(New System.Windows.Forms.MenuItem() {Me.MenuItem2})
        Me.MenuItem1.Text = "文件(&F)"
        '
        'MenuItem2
        '
        Me.MenuItem2.Index = 0
        Me.MenuItem2.Text = "退出(&X)"
        '
        'MenuItem3
        '
        Me.MenuItem3.Index = 1
        Me.MenuItem3.Shortcut = System.Windows.Forms.Shortcut.F1
        Me.MenuItem3.Text = "帮助(&H)"
        '
        'GroupBox1
        '
        Me.GroupBox1.Controls.Add(Me.Button2)
        Me.GroupBox1.Controls.Add(Me.Button1)
        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(8, 0)
        Me.GroupBox1.Name = "GroupBox1"
        Me.GroupBox1.Size = New System.Drawing.Size(120, 144)
        Me.GroupBox1.TabIndex = 1
        Me.GroupBox1.TabStop = False
        '
        'Button2
        '
        Me.Button2.Location = New System.Drawing.Point(32, 112)
        Me.Button2.Name = "Button2"
        Me.Button2.TabIndex = 5
        Me.Button2.Text = "更改"
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(32, 88)
        Me.Button1.Name = "Button1"
        Me.Button1.TabIndex = 4
        Me.Button1.Text = "添加"
        '
        'TextBox2
        '
        Me.TextBox2.Location = New System.Drawing.Point(8, 64)
        Me.TextBox2.Name = "TextBox2"
        Me.TextBox2.PasswordChar = Microsoft.VisualBasic.ChrW(42)
        Me.TextBox2.TabIndex = 3
        Me.TextBox2.Text = ""
        '
        'Label2
        '
        Me.Label2.Location = New System.Drawing.Point(8, 48)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(53, 16)
        Me.Label2.TabIndex = 2
        Me.Label2.Text = "密码"
        '
        'TextBox1
        '
        Me.TextBox1.Location = New System.Drawing.Point(8, 24)
        Me.TextBox1.Name = "TextBox1"
        Me.TextBox1.TabIndex = 1
        Me.TextBox1.Text = ""
        '
        'Label1
        '
        Me.Label1.Location = New System.Drawing.Point(8, 8)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(48, 16)
        Me.Label1.TabIndex = 0
        Me.Label1.Text = "用户名"
        '
        'GroupBox2
        '
        Me.GroupBox2.Controls.Add(Me.DataGrid1)
        Me.GroupBox2.Location = New System.Drawing.Point(128, 0)
        Me.GroupBox2.Name = "GroupBox2"
        Me.GroupBox2.Size = New System.Drawing.Size(152, 144)
        Me.GroupBox2.TabIndex = 2
        Me.GroupBox2.TabStop = False
        '
        'DataGrid1
        '
        Me.DataGrid1.DataMember = ""
        Me.DataGrid1.HeaderForeColor = System.Drawing.SystemColors.ControlText
        Me.DataGrid1.Location = New System.Drawing.Point(8, 16)
        Me.DataGrid1.Name = "DataGrid1"
        Me.DataGrid1.Size = New System.Drawing.Size(136, 120)
        Me.DataGrid1.TabIndex = 0
        '
        '管理员管理
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(280, 145)
        Me.Controls.Add(Me.GroupBox2)
        Me.Controls.Add(Me.GroupBox1)
        Me.MaximizeBox = False
        Me.Menu = Me.MainMenu1
        Me.Name = "管理员管理"
        Me.Text = "管理员管理"
        Me.GroupBox1.ResumeLayout(False)
        Me.GroupBox2.ResumeLayout(False)
        CType(Me.DataGrid1, System.ComponentModel.ISupportInitialize).EndInit()
        Me.ResumeLayout(False)

    End Sub

#End Region
    Private Sub MenuItem2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MenuItem2.Click
        Me.Close()
    End Sub
    Dim cmd As New OleDbCommand
    Dim cmda As New OleDbCommand("select * from 管理员表", myconn)
    Dim da As OleDbDataAdapter = New OleDbDataAdapter(cmda)
    Dim dsa As DataSet = New DataSet
    Sub db()
        dsa.Clear()
        da.Fill(dsa)
        DataGrid1.DataSource = dsa.Tables(0)
        myconn.Close()
    End Sub
    Private Sub 用户管理_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Try
            db()
        Catch ex As Exception
        End Try
    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Try
            Dim strsql As String
            strsql = "insert into 管理员表(用户名,密码) values('" & TextBox1.Text & "','" & TextBox2.Text & "')"
            myconn.Open()
            cmd = New OleDbCommand
            cmd.Connection = myconn
            cmd.CommandText() = strsql
            cmd.ExecuteNonQuery()
            myconn.Close()
            db()
        Catch ex As Exception
        End Try
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Try
            Dim strsql As String
            strsql = "update 管理员表 set 密码='" & TextBox2.Text & "' where 用户名='" & TextBox1.Text & "' "
            myconn.Open()
            cmd = New OleDbCommand
            cmd.Connection = myconn
            cmd.CommandText() = strsql
            cmd.ExecuteNonQuery()
            myconn.Close()
            db()
            TextBox1.Enabled = True
            Button1.Enabled = True
        Catch ex As Exception
        End Try
    End Sub

    Private Sub MenuItem3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MenuItem3.Click
        Process.Start(Application.StartupPath & ("\3.txt"))
    End Sub

    Private Sub DataGrid1_CurrentCellChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles DataGrid1.CurrentCellChanged
        Try
            Dim yongh As String
            yongh = DataGrid1.Item(DataGrid1.CurrentCell.RowNumber, 0)
            MsgBox(yongh)
            Dim yonghcmda As New OleDbCommand("select * from 管理员表 where 用户名='" & yongh & "'", myconn)
            Dim yonghda As OleDbDataAdapter = New OleDbDataAdapter(yonghcmda)
            Dim yonghdsa As DataSet = New DataSet
            yonghdsa.Clear()
            yonghda.Fill(yonghdsa)
            TextBox1.Text = yonghdsa.Tables(0).Rows(0)("用户名")
            TextBox2.Text = yonghdsa.Tables(0).Rows(0)("密码")
            TextBox1.Enabled = False
            Button1.Enabled = False
        Catch ex As Exception
        End Try
    End Sub
End Class