hadload.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_bookinfo
    Inherits System.Windows.Forms.Form
    Dim sqlstr, sqlstr2, sqlstr3 As String 'SQL语句标记
    Dim objDS, objDS2, objDS3 As DataSet '数据在内存中的缓存
    Dim login As New library2.win_login
    Dim i As Integer, j As Integer

#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 List_loanbook As System.Windows.Forms.ListView
    Friend WithEvents Column_bookname As System.Windows.Forms.ColumnHeader
    Friend WithEvents Column_author As System.Windows.Forms.ColumnHeader
    Friend WithEvents Column_classify As System.Windows.Forms.ColumnHeader
    Friend WithEvents Column_bookconcern As System.Windows.Forms.ColumnHeader
    Friend WithEvents btok As System.Windows.Forms.Button
    Friend WithEvents Column_relturntime As System.Windows.Forms.ColumnHeader
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Dim resources As System.Resources.ResourceManager = New System.Resources.ResourceManager(GetType(win_bookinfo))
        Me.List_loanbook = New System.Windows.Forms.ListView
        Me.Column_bookname = New System.Windows.Forms.ColumnHeader
        Me.Column_author = New System.Windows.Forms.ColumnHeader
        Me.Column_classify = New System.Windows.Forms.ColumnHeader
        Me.Column_bookconcern = New System.Windows.Forms.ColumnHeader
        Me.Column_relturntime = New System.Windows.Forms.ColumnHeader
        Me.btok = New System.Windows.Forms.Button
        Me.SuspendLayout()
        '
        'List_loanbook
        '
        Me.List_loanbook.BackColor = System.Drawing.SystemColors.Control
        Me.List_loanbook.CausesValidation = False
        Me.List_loanbook.Columns.AddRange(New System.Windows.Forms.ColumnHeader() {Me.Column_bookname, Me.Column_author, Me.Column_classify, Me.Column_bookconcern, Me.Column_relturntime})
        Me.List_loanbook.FullRowSelect = True
        Me.List_loanbook.GridLines = True
        Me.List_loanbook.HeaderStyle = System.Windows.Forms.ColumnHeaderStyle.Nonclickable
        Me.List_loanbook.HideSelection = False
        Me.List_loanbook.Location = New System.Drawing.Point(6, 6)
        Me.List_loanbook.MultiSelect = False
        Me.List_loanbook.Name = "List_loanbook"
        Me.List_loanbook.Size = New System.Drawing.Size(480, 128)
        Me.List_loanbook.TabIndex = 3
        Me.List_loanbook.TabStop = False
        Me.List_loanbook.View = System.Windows.Forms.View.Details
        '
        'Column_bookname
        '
        Me.Column_bookname.Text = "书名"
        Me.Column_bookname.Width = 98
        '
        'Column_author
        '
        Me.Column_author.Text = "作者"
        Me.Column_author.Width = 76
        '
        'Column_classify
        '
        Me.Column_classify.Text = "分类"
        Me.Column_classify.Width = 77
        '
        'Column_bookconcern
        '
        Me.Column_bookconcern.Text = "出版社"
        Me.Column_bookconcern.Width = 96
        '
        'Column_relturntime
        '
        Me.Column_relturntime.Text = "归还时间"
        Me.Column_relturntime.Width = 129
        '
        'btok
        '
        Me.btok.DialogResult = System.Windows.Forms.DialogResult.Cancel
        Me.btok.Location = New System.Drawing.Point(310, 142)
        Me.btok.Name = "btok"
        Me.btok.Size = New System.Drawing.Size(56, 24)
        Me.btok.TabIndex = 2
        Me.btok.Text = "确定"
        '
        'win_bookinfo
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.CancelButton = Me.btok
        Me.ClientSize = New System.Drawing.Size(492, 173)
        Me.ControlBox = False
        Me.Controls.Add(Me.List_loanbook)
        Me.Controls.Add(Me.btok)
        Me.Icon = CType(resources.GetObject("$this.Icon"), System.Drawing.Icon)
        Me.MaximumSize = New System.Drawing.Size(500, 200)
        Me.MinimumSize = New System.Drawing.Size(500, 200)
        Me.Name = "win_bookinfo"
        Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
        Me.Text = "借阅图书资料列表"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub btok_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btok.Click
        Close()
    End Sub

    Private Sub bookinfo_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        sqlstr = "select bookid,shouldreturntime from landinfo where studentid=" & login.loginid & " and hadreturn= 0"
        Try
            objDS = GetData(sqlstr)
            List_loanbook.Items.Clear()
            For i = 0 To objDS.Tables(0).Rows.Count - 1
                sqlstr2 = "select * from bookinfo where id =" & objDS.Tables(0).Rows(i)("bookid") & ""
                objDS2 = GetData(sqlstr2)
                Dim li As New ListViewItem
                li.SubItems(0).Text = objDS2.Tables(0).Rows(0)("name").ToString
                li.SubItems.Add(objDS2.Tables(0).Rows(0)("author").ToString)
                li.SubItems.Add(showclassifyname(objDS2.Tables(0).Rows(0)("classify")))
                li.SubItems.Add(objDS2.Tables(0).Rows(0)("bookconcern").ToString)
                li.SubItems.Add(objDS.Tables(0).Rows(0)("shouldreturntime").ToString)
                List_loanbook.Items.Add(li)
            Next
        Catch
            MsgBox("读取数据错误。", MsgBoxStyle.Information + MsgBoxStyle.OKOnly, "错误")
        End Try
    End Sub

    Function showclassifyname(ByVal classifyid) As String
        sqlstr3 = "select * from classify where id=" & classifyid & ""
        objDS3 = GetData(sqlstr3)
        If objDS3.Tables(0).Rows.Count > 0 Then
            Return objDS3.Tables(0).Rows(0)("name").ToString
        Else
            Return "不详"
        End If
    End Function
End Class