admin_boardmanage.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_boardmanage
    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
    Dim boardid As Integer, i As Integer
    Dim login As New library2.win_login

#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 GroupBox3 As System.Windows.Forms.GroupBox
    Friend WithEvents GroupBox2 As System.Windows.Forms.GroupBox
    Friend WithEvents rtbboardcontent As System.Windows.Forms.RichTextBox
    Friend WithEvents lblistboard As System.Windows.Forms.ListBox
    Friend WithEvents btmodi As System.Windows.Forms.Button
    Friend WithEvents btdelete As System.Windows.Forms.Button
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents Label3 As System.Windows.Forms.Label
    Friend WithEvents Label4 As System.Windows.Forms.Label
    Friend WithEvents btadd As System.Windows.Forms.Button
    Friend WithEvents btreset As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Dim resources As System.Resources.ResourceManager = New System.Resources.ResourceManager(GetType(win_boardmanage))
        Me.GroupBox1 = New System.Windows.Forms.GroupBox
        Me.btreset = New System.Windows.Forms.Button
        Me.btadd = New System.Windows.Forms.Button
        Me.Button1 = New System.Windows.Forms.Button
        Me.GroupBox3 = New System.Windows.Forms.GroupBox
        Me.Label4 = New System.Windows.Forms.Label
        Me.Label3 = New System.Windows.Forms.Label
        Me.Label1 = New System.Windows.Forms.Label
        Me.Label2 = New System.Windows.Forms.Label
        Me.rtbboardcontent = New System.Windows.Forms.RichTextBox
        Me.GroupBox2 = New System.Windows.Forms.GroupBox
        Me.lblistboard = New System.Windows.Forms.ListBox
        Me.btmodi = New System.Windows.Forms.Button
        Me.btdelete = New System.Windows.Forms.Button
        Me.GroupBox1.SuspendLayout()
        Me.GroupBox3.SuspendLayout()
        Me.GroupBox2.SuspendLayout()
        Me.SuspendLayout()
        '
        'GroupBox1
        '
        Me.GroupBox1.Controls.Add(Me.btreset)
        Me.GroupBox1.Controls.Add(Me.btadd)
        Me.GroupBox1.Controls.Add(Me.Button1)
        Me.GroupBox1.Controls.Add(Me.GroupBox3)
        Me.GroupBox1.Controls.Add(Me.GroupBox2)
        Me.GroupBox1.Controls.Add(Me.btmodi)
        Me.GroupBox1.Controls.Add(Me.btdelete)
        Me.GroupBox1.ForeColor = System.Drawing.SystemColors.ControlDark
        Me.GroupBox1.Location = New System.Drawing.Point(4, 2)
        Me.GroupBox1.Name = "GroupBox1"
        Me.GroupBox1.Size = New System.Drawing.Size(368, 206)
        Me.GroupBox1.TabIndex = 1
        Me.GroupBox1.TabStop = False
        Me.GroupBox1.Text = "公告管理"
        '
        'btreset
        '
        Me.btreset.ForeColor = System.Drawing.SystemColors.ControlText
        Me.btreset.Location = New System.Drawing.Point(179, 175)
        Me.btreset.Name = "btreset"
        Me.btreset.Size = New System.Drawing.Size(48, 24)
        Me.btreset.TabIndex = 4
        Me.btreset.Text = "重置"
        '
        'btadd
        '
        Me.btadd.ForeColor = System.Drawing.SystemColors.ControlText
        Me.btadd.Location = New System.Drawing.Point(47, 175)
        Me.btadd.Name = "btadd"
        Me.btadd.Size = New System.Drawing.Size(48, 24)
        Me.btadd.TabIndex = 2
        Me.btadd.Text = "添加"
        '
        'Button1
        '
        Me.Button1.DialogResult = System.Windows.Forms.DialogResult.Cancel
        Me.Button1.ForeColor = System.Drawing.SystemColors.ControlText
        Me.Button1.Location = New System.Drawing.Point(311, 174)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(48, 24)
        Me.Button1.TabIndex = 6
        Me.Button1.Text = "关闭"
        '
        'GroupBox3
        '
        Me.GroupBox3.Controls.Add(Me.Label4)
        Me.GroupBox3.Controls.Add(Me.Label3)
        Me.GroupBox3.Controls.Add(Me.Label1)
        Me.GroupBox3.Controls.Add(Me.Label2)
        Me.GroupBox3.Controls.Add(Me.rtbboardcontent)
        Me.GroupBox3.Location = New System.Drawing.Point(144, 16)
        Me.GroupBox3.Name = "GroupBox3"
        Me.GroupBox3.Size = New System.Drawing.Size(216, 151)
        Me.GroupBox3.TabIndex = 8
        Me.GroupBox3.TabStop = False
        Me.GroupBox3.Text = "公告内容"
        '
        'Label4
        '
        Me.Label4.ForeColor = System.Drawing.SystemColors.ControlText
        Me.Label4.Location = New System.Drawing.Point(109, 108)
        Me.Label4.Name = "Label4"
        Me.Label4.Size = New System.Drawing.Size(89, 18)
        Me.Label4.TabIndex = 12
        Me.Label4.TextAlign = System.Drawing.ContentAlignment.MiddleLeft
        '
        'Label3
        '
        Me.Label3.ForeColor = System.Drawing.SystemColors.ControlText
        Me.Label3.Location = New System.Drawing.Point(27, 110)
        Me.Label3.Name = "Label3"
        Me.Label3.Size = New System.Drawing.Size(84, 17)
        Me.Label3.TabIndex = 11
        Me.Label3.Text = "发布管理员："
        Me.Label3.TextAlign = System.Drawing.ContentAlignment.MiddleRight
        '
        'Label1
        '
        Me.Label1.ForeColor = System.Drawing.SystemColors.ControlText
        Me.Label1.Location = New System.Drawing.Point(156, 128)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(48, 16)
        Me.Label1.TabIndex = 10
        Me.Label1.Text = "0"
        Me.Label1.TextAlign = System.Drawing.ContentAlignment.MiddleLeft
        '
        'Label2
        '
        Me.Label2.ForeColor = System.Drawing.SystemColors.ControlText
        Me.Label2.Location = New System.Drawing.Point(12, 128)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(152, 16)
        Me.Label2.TabIndex = 9
        Me.Label2.Text = "最大长度 60，当前字数："
        Me.Label2.TextAlign = System.Drawing.ContentAlignment.MiddleCenter
        '
        'rtbboardcontent
        '
        Me.rtbboardcontent.Location = New System.Drawing.Point(8, 16)
        Me.rtbboardcontent.MaxLength = 59
        Me.rtbboardcontent.Name = "rtbboardcontent"
        Me.rtbboardcontent.Size = New System.Drawing.Size(200, 89)
        Me.rtbboardcontent.TabIndex = 1
        Me.rtbboardcontent.Text = ""
        '
        'GroupBox2
        '
        Me.GroupBox2.Controls.Add(Me.lblistboard)
        Me.GroupBox2.Location = New System.Drawing.Point(8, 16)
        Me.GroupBox2.Name = "GroupBox2"
        Me.GroupBox2.Size = New System.Drawing.Size(128, 151)
        Me.GroupBox2.TabIndex = 7
        Me.GroupBox2.TabStop = False
        Me.GroupBox2.Text = "公告列表"
        '
        'lblistboard
        '
        Me.lblistboard.ItemHeight = 12
        Me.lblistboard.Location = New System.Drawing.Point(8, 16)
        Me.lblistboard.Name = "lblistboard"
        Me.lblistboard.Size = New System.Drawing.Size(112, 124)
        Me.lblistboard.TabIndex = 7
        '
        'btmodi
        '
        Me.btmodi.ForeColor = System.Drawing.SystemColors.ControlText
        Me.btmodi.Location = New System.Drawing.Point(113, 175)
        Me.btmodi.Name = "btmodi"
        Me.btmodi.Size = New System.Drawing.Size(48, 24)
        Me.btmodi.TabIndex = 3
        Me.btmodi.Text = "修改"
        '
        'btdelete
        '
        Me.btdelete.ForeColor = System.Drawing.SystemColors.ControlText
        Me.btdelete.Location = New System.Drawing.Point(245, 175)
        Me.btdelete.Name = "btdelete"
        Me.btdelete.Size = New System.Drawing.Size(48, 24)
        Me.btdelete.TabIndex = 5
        Me.btdelete.Text = "删除"
        '
        'win_boardmanage
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.CancelButton = Me.Button1
        Me.ClientSize = New System.Drawing.Size(376, 213)
        Me.Controls.Add(Me.GroupBox1)
        Me.Icon = CType(resources.GetObject("$this.Icon"), System.Drawing.Icon)
        Me.MaximizeBox = False
        Me.MaximumSize = New System.Drawing.Size(384, 240)
        Me.MinimumSize = New System.Drawing.Size(384, 240)
        Me.Name = "win_boardmanage"
        Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
        Me.Text = "图书馆管理系统--公告管理"
        Me.GroupBox1.ResumeLayout(False)
        Me.GroupBox3.ResumeLayout(False)
        Me.GroupBox2.ResumeLayout(False)
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub btmodi_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btmodi.Click
        If rtbboardcontent.Text = "" Then
            MessageBox.Show("公告内容不能为空", "错误", MessageBoxButtons.OK, MessageBoxIcon.Information)
            rtbboardcontent.Focus()
        Else
            sqlstr = "update board set content='" & filter(Trim(rtbboardcontent.Text.ToString)) & "' where id=" & boardid & ""
            GetData(sqlstr)
            rtbboardcontent.Clear()
            rtbboardcontent.Text = ""
            loaddata()
            MessageBox.Show("公告修改成功", "操作成功", MessageBoxButtons.OK, MessageBoxIcon.Information)
        End If
    End Sub

    Private Sub win_boardmanage_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        loaddata()
    End Sub

    Function loaddata()
        lblistboard.Items.Clear()
        Try
            sqlstr = "select * from board"
            objDS = GetData(sqlstr)
            For i = 0 To objDS.Tables(0).Rows.Count - 1
                If objDS.Tables(0).Rows(i)("content").ToString.Length > 7 Then
                    lblistboard.Items.Insert(0, Mid(objDS.Tables(0).Rows(i)("content").ToString, 1, 7) & "...                               ," & objDS.Tables(0).Rows(i)("id").ToString) '将公告ID隐藏在列表中
                Else
                    lblistboard.Items.Insert(0, objDS.Tables(0).Rows(i)("content").ToString & "                               ," & objDS.Tables(0).Rows(i)("id").ToString)
                End If
            Next
        Catch
            MsgBox("读取数据库错误。", MsgBoxStyle.Information + MsgBoxStyle.OKOnly, "错误")
        End Try
    End Function

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Close()
    End Sub

    Private Sub btdelete_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btdelete.Click
        Try
            If boardid <> 0 Then
                sqlstr = "delete from board where id=" & boardid & ""
                UpdateData(sqlstr)
                rtbboardcontent.Clear()
                rtbboardcontent.Text = ""
                loaddata()
                MessageBox.Show("删除公告成功", "操作成功", MessageBoxButtons.OK, MessageBoxIcon.Information)
            End If
        Catch
            MsgBox("数据库更新错误。", MsgBoxStyle.Information + MsgBoxStyle.OKOnly, "错误")
        End Try
    End Sub

    Private Sub rtbboardcontent_TextChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles rtbboardcontent.TextChanged
        Label1.Text = rtbboardcontent.Text.Length
    End Sub

    Private Sub lblistboard_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles lblistboard.SelectedIndexChanged
        Try
            Dim splitboard() As String, showboard As String, adminid As Integer
            splitboard = Split(lblistboard.SelectedItem.ToString, ",")
            boardid = CLng(splitboard(1))

            sqlstr = "select * from board where id=" & boardid & ""
            objDS = GetData(sqlstr)
            showboard = objDS.Tables(0).Rows(0)("content").ToString
            rtbboardcontent.Text = showboard
            Label1.Text = showboard.Length
            adminid = CInt(objDS.Tables(0).Rows(0)("admin"))
            Label4.Text = showadminname(adminid)
        Catch
            MsgBox("读取数据库错误。", MsgBoxStyle.Information + MsgBoxStyle.OKOnly, "错误")
        End Try
    End Sub

    Private Sub btadd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btadd.Click
        Try
            If rtbboardcontent.Text = "" Then
                MessageBox.Show("公告内容不能为空", "错误", MessageBoxButtons.OK, MessageBoxIcon.Information)
                rtbboardcontent.Focus()
            Else
                sqlstr = "insert into board(content,admin) values('" & filter(Trim(rtbboardcontent.Text.ToString)) & "'," & login.loginid & ")"
                GetData(sqlstr)
                rtbboardcontent.Clear()
                rtbboardcontent.Text = ""
                loaddata()
                MessageBox.Show("公告添加成功", "操作成功", MessageBoxButtons.OK, MessageBoxIcon.Information)
            End If
        Catch
            MsgBox("更新数据库成功。", MsgBoxStyle.Information + MsgBoxStyle.OKOnly, "成功")
        End Try
    End Sub

    Private Sub btreset_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btreset.Click
        rtbboardcontent.Text = ""
    End Sub
End Class