admin_studentdata.vb

图书馆管理系统,是数据库的课程设计,报告里面包含了需求分析数据字典概念结构设计逻辑结构设计数据库物理设计数据库实施

Imports System.Data
'引入数据库操作类命名空间
Imports System.Data.OleDb
'引入ADO.NET操作命名空间

Public Class win_studentdata
    Inherits System.Windows.Forms.Form
    Dim sqlstr As String 'SQL语句标记
    Dim objDS As DataSet '数据在内存中的缓存

#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 ListView1 As System.Windows.Forms.ListView
    Friend WithEvents ColumnHeader1 As System.Windows.Forms.ColumnHeader
    Friend WithEvents ColumnHeader2 As System.Windows.Forms.ColumnHeader
    Friend WithEvents ColumnHeader3 As System.Windows.Forms.ColumnHeader
    Friend WithEvents ColumnHeader4 As System.Windows.Forms.ColumnHeader
    Friend WithEvents ColumnHeader5 As System.Windows.Forms.ColumnHeader
    Friend WithEvents ColumnHeader6 As System.Windows.Forms.ColumnHeader
    Friend WithEvents ColumnHeader7 As System.Windows.Forms.ColumnHeader
    Friend WithEvents ColumnHeader8 As System.Windows.Forms.ColumnHeader
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents Button2 As System.Windows.Forms.Button
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents tbkeyword As System.Windows.Forms.TextBox
    Friend WithEvents cbseacher As System.Windows.Forms.ComboBox
    Friend WithEvents btseach As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Dim resources As System.Resources.ResourceManager = New System.Resources.ResourceManager(GetType(win_studentdata))
        Me.ListView1 = New System.Windows.Forms.ListView
        Me.ColumnHeader1 = New System.Windows.Forms.ColumnHeader
        Me.ColumnHeader2 = New System.Windows.Forms.ColumnHeader
        Me.ColumnHeader3 = New System.Windows.Forms.ColumnHeader
        Me.ColumnHeader4 = New System.Windows.Forms.ColumnHeader
        Me.ColumnHeader5 = New System.Windows.Forms.ColumnHeader
        Me.ColumnHeader6 = New System.Windows.Forms.ColumnHeader
        Me.ColumnHeader7 = New System.Windows.Forms.ColumnHeader
        Me.ColumnHeader8 = New System.Windows.Forms.ColumnHeader
        Me.Label1 = New System.Windows.Forms.Label
        Me.tbkeyword = New System.Windows.Forms.TextBox
        Me.cbseacher = New System.Windows.Forms.ComboBox
        Me.btseach = New System.Windows.Forms.Button
        Me.Button2 = New System.Windows.Forms.Button
        Me.Label2 = New System.Windows.Forms.Label
        Me.SuspendLayout()
        '
        'ListView1
        '
        Me.ListView1.BackColor = System.Drawing.Color.DarkGray
        Me.ListView1.Columns.AddRange(New System.Windows.Forms.ColumnHeader() {Me.ColumnHeader1, Me.ColumnHeader2, Me.ColumnHeader3, Me.ColumnHeader4, Me.ColumnHeader5, Me.ColumnHeader6, Me.ColumnHeader7, Me.ColumnHeader8})
        Me.ListView1.FullRowSelect = True
        Me.ListView1.GridLines = True
        Me.ListView1.Location = New System.Drawing.Point(0, 0)
        Me.ListView1.Name = "ListView1"
        Me.ListView1.Size = New System.Drawing.Size(720, 288)
        Me.ListView1.TabIndex = 5
        Me.ListView1.View = System.Windows.Forms.View.Details
        '
        'ColumnHeader1
        '
        Me.ColumnHeader1.Text = "编号"
        Me.ColumnHeader1.Width = 46
        '
        'ColumnHeader2
        '
        Me.ColumnHeader2.Text = "姓名"
        Me.ColumnHeader2.Width = 87
        '
        'ColumnHeader3
        '
        Me.ColumnHeader3.Text = "学号"
        Me.ColumnHeader3.Width = 92
        '
        'ColumnHeader4
        '
        Me.ColumnHeader4.Text = "班级"
        Me.ColumnHeader4.Width = 90
        '
        'ColumnHeader5
        '
        Me.ColumnHeader5.Text = "电话"
        Me.ColumnHeader5.Width = 98
        '
        'ColumnHeader6
        '
        Me.ColumnHeader6.Text = "借阅次数"
        '
        'ColumnHeader7
        '
        Me.ColumnHeader7.Text = "登陆次数"
        '
        'ColumnHeader8
        '
        Me.ColumnHeader8.Text = "最后登陆时间"
        Me.ColumnHeader8.Width = 182
        '
        'Label1
        '
        Me.Label1.Location = New System.Drawing.Point(344, 296)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(64, 24)
        Me.Label1.TabIndex = 1
        Me.Label1.Text = "查询方式:"
        Me.Label1.TextAlign = System.Drawing.ContentAlignment.MiddleRight
        '
        'tbkeyword
        '
        Me.tbkeyword.Location = New System.Drawing.Point(248, 296)
        Me.tbkeyword.Name = "tbkeyword"
        Me.tbkeyword.Size = New System.Drawing.Size(88, 21)
        Me.tbkeyword.TabIndex = 1
        Me.tbkeyword.Text = ""
        '
        'cbseacher
        '
        Me.cbseacher.Items.AddRange(New Object() {"编号", "姓名", "学号", "班级"})
        Me.cbseacher.Location = New System.Drawing.Point(408, 296)
        Me.cbseacher.Name = "cbseacher"
        Me.cbseacher.Size = New System.Drawing.Size(88, 20)
        Me.cbseacher.TabIndex = 2
        Me.cbseacher.Text = "编号"
        '
        'btseach
        '
        Me.btseach.Location = New System.Drawing.Point(504, 296)
        Me.btseach.Name = "btseach"
        Me.btseach.Size = New System.Drawing.Size(48, 24)
        Me.btseach.TabIndex = 3
        Me.btseach.Text = "查询"
        '
        'Button2
        '
        Me.Button2.DialogResult = System.Windows.Forms.DialogResult.Cancel
        Me.Button2.Location = New System.Drawing.Point(560, 296)
        Me.Button2.Name = "Button2"
        Me.Button2.Size = New System.Drawing.Size(48, 24)
        Me.Button2.TabIndex = 4
        Me.Button2.Text = "关闭"
        '
        'Label2
        '
        Me.Label2.Location = New System.Drawing.Point(168, 296)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(72, 24)
        Me.Label2.TabIndex = 6
        Me.Label2.Text = "关键词:"
        Me.Label2.TextAlign = System.Drawing.ContentAlignment.MiddleRight
        '
        'win_studentdata
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.CancelButton = Me.Button2
        Me.ClientSize = New System.Drawing.Size(720, 333)
        Me.Controls.Add(Me.Label2)
        Me.Controls.Add(Me.Button2)
        Me.Controls.Add(Me.btseach)
        Me.Controls.Add(Me.cbseacher)
        Me.Controls.Add(Me.tbkeyword)
        Me.Controls.Add(Me.Label1)
        Me.Controls.Add(Me.ListView1)
        Me.Icon = CType(resources.GetObject("$this.Icon"), System.Drawing.Icon)
        Me.MaximizeBox = False
        Me.Name = "win_studentdata"
        Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
        Me.Text = "图书馆管理系统--学生数据"
        Me.ResumeLayout(False)

    End Sub

#End Region

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

    Private Sub win_studentdata_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        sqlstr = "select * from studentinfo"
        objDS = GetData(sqlstr)
        LoadData()
    End Sub

    Function LoadData()
        Dim i As Integer
        ListView1.Items.Clear()
        For i = 0 To objDS.Tables(0).Rows.Count - 1
            Dim li As New ListViewItem
            li.SubItems.Clear()
            li.SubItems(0).Text = objDS.Tables(0).Rows(i)("id").ToString
            li.SubItems.Add(objDS.Tables(0).Rows(i)("name").ToString)
            li.SubItems.Add(objDS.Tables(0).Rows(i)("learnid").ToString)
            li.SubItems.Add(objDS.Tables(0).Rows(i)("class").ToString)
            li.SubItems.Add(objDS.Tables(0).Rows(i)("phone").ToString)
            li.SubItems.Add(objDS.Tables(0).Rows(i)("lands").ToString)
            li.SubItems.Add(objDS.Tables(0).Rows(i)("logins").ToString)
            li.SubItems.Add(objDS.Tables(0).Rows(i)("lastlogin").ToString)
            ListView1.Items.Add(li) '插入到ListView1
        Next
    End Function

    Private Sub btseach_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btseach.Click
        Dim keyword, seacher As String, canseach As Boolean = True
        keyword = filter(Trim(tbkeyword.Text).ToString)
        seacher = filter(Trim(cbseacher.Text).ToString)
        If keyword = "" Then
            MessageBox.Show("关键词不能为空", "操作错误", MessageBoxButtons.OK, MessageBoxIcon.Information)
            tbkeyword.Focus()
            canseach = False
        ElseIf seacher = "" Then
            MessageBox.Show("查询方式不能为空", "操作错误", MessageBoxButtons.OK, MessageBoxIcon.Information)
            cbseacher.Focus()
            canseach = False
        End If
        If canseach Then
            seacher = changeseacher(seacher)
            sqlstr = "select * from studentinfo where " & seacher & " like '%" & keyword & "%'"
            objDS = GetData(sqlstr)
            LoadData()
        End If
    End Sub

    Function changeseacher(ByVal fstring) As String
        Select Case fstring
            Case "编号"
                Return "id"
            Case "姓名"
                Return "name"
            Case "学号"
                Return "learnid"
            Case "班级"
                Return "class"
            Case Else
                Return "id"
        End Select
    End Function
End Class