frmclass.vb

教务管理系统：学生成绩管理

Imports System.Data.SqlClient
Imports System.IO

Public Class FrmClass
    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 TreeView1 As System.Windows.Forms.TreeView
    Friend WithEvents GroupBox1 As System.Windows.Forms.GroupBox
    Friend WithEvents TxtClassNum As System.Windows.Forms.TextBox
    Friend WithEvents LblClassNum As System.Windows.Forms.Label
    Friend WithEvents CmbClassDep As System.Windows.Forms.ComboBox
    Friend WithEvents LblClassDep As System.Windows.Forms.Label
    Friend WithEvents CmbClassYear As System.Windows.Forms.ComboBox
    Friend WithEvents LblClassYear As System.Windows.Forms.Label
    Friend WithEvents TxtClassID As System.Windows.Forms.TextBox
    Friend WithEvents C As System.Windows.Forms.Label
    Friend WithEvents BtnExit As System.Windows.Forms.Button
    Friend WithEvents BtnDel As System.Windows.Forms.Button
    Friend WithEvents BtnEdit As System.Windows.Forms.Button
    Friend WithEvents BtnAdd As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.TreeView1 = New System.Windows.Forms.TreeView
        Me.GroupBox1 = New System.Windows.Forms.GroupBox
        Me.BtnExit = New System.Windows.Forms.Button
        Me.BtnDel = New System.Windows.Forms.Button
        Me.BtnEdit = New System.Windows.Forms.Button
        Me.BtnAdd = New System.Windows.Forms.Button
        Me.TxtClassID = New System.Windows.Forms.TextBox
        Me.C = New System.Windows.Forms.Label
        Me.TxtClassNum = New System.Windows.Forms.TextBox
        Me.LblClassNum = New System.Windows.Forms.Label
        Me.CmbClassDep = New System.Windows.Forms.ComboBox
        Me.LblClassDep = New System.Windows.Forms.Label
        Me.CmbClassYear = New System.Windows.Forms.ComboBox
        Me.LblClassYear = New System.Windows.Forms.Label
        Me.GroupBox1.SuspendLayout()
        Me.SuspendLayout()
        '
        'TreeView1
        '
        Me.TreeView1.ImageIndex = -1
        Me.TreeView1.Location = New System.Drawing.Point(8, 8)
        Me.TreeView1.Name = "TreeView1"
        Me.TreeView1.SelectedImageIndex = -1
        Me.TreeView1.Size = New System.Drawing.Size(256, 376)
        Me.TreeView1.TabIndex = 0
        '
        'GroupBox1
        '
        Me.GroupBox1.Controls.Add(Me.BtnExit)
        Me.GroupBox1.Controls.Add(Me.BtnDel)
        Me.GroupBox1.Controls.Add(Me.BtnEdit)
        Me.GroupBox1.Controls.Add(Me.BtnAdd)
        Me.GroupBox1.Controls.Add(Me.TxtClassID)
        Me.GroupBox1.Controls.Add(Me.C)
        Me.GroupBox1.Controls.Add(Me.TxtClassNum)
        Me.GroupBox1.Controls.Add(Me.LblClassNum)
        Me.GroupBox1.Controls.Add(Me.CmbClassDep)
        Me.GroupBox1.Controls.Add(Me.LblClassDep)
        Me.GroupBox1.Controls.Add(Me.CmbClassYear)
        Me.GroupBox1.Controls.Add(Me.LblClassYear)
        Me.GroupBox1.Location = New System.Drawing.Point(280, 8)
        Me.GroupBox1.Name = "GroupBox1"
        Me.GroupBox1.Size = New System.Drawing.Size(144, 376)
        Me.GroupBox1.TabIndex = 1
        Me.GroupBox1.TabStop = False
        '
        'BtnExit
        '
        Me.BtnExit.Location = New System.Drawing.Point(8, 336)
        Me.BtnExit.Name = "BtnExit"
        Me.BtnExit.Size = New System.Drawing.Size(104, 24)
        Me.BtnExit.TabIndex = 11
        Me.BtnExit.Text = "退出"
        '
        'BtnDel
        '
        Me.BtnDel.Location = New System.Drawing.Point(8, 304)
        Me.BtnDel.Name = "BtnDel"
        Me.BtnDel.Size = New System.Drawing.Size(104, 24)
        Me.BtnDel.TabIndex = 10
        Me.BtnDel.Text = "删除班级"
        '
        'BtnEdit
        '
        Me.BtnEdit.Location = New System.Drawing.Point(8, 272)
        Me.BtnEdit.Name = "BtnEdit"
        Me.BtnEdit.Size = New System.Drawing.Size(104, 24)
        Me.BtnEdit.TabIndex = 9
        Me.BtnEdit.Text = "修改班级"
        '
        'BtnAdd
        '
        Me.BtnAdd.Location = New System.Drawing.Point(8, 240)
        Me.BtnAdd.Name = "BtnAdd"
        Me.BtnAdd.Size = New System.Drawing.Size(104, 24)
        Me.BtnAdd.TabIndex = 8
        Me.BtnAdd.Text = "添加班级"
        '
        'TxtClassID
        '
        Me.TxtClassID.Location = New System.Drawing.Point(8, 40)
        Me.TxtClassID.Name = "TxtClassID"
        Me.TxtClassID.TabIndex = 7
        Me.TxtClassID.Text = ""
        '
        'C
        '
        Me.C.Location = New System.Drawing.Point(8, 16)
        Me.C.Name = "C"
        Me.C.Size = New System.Drawing.Size(128, 23)
        Me.C.TabIndex = 6
        Me.C.Text = "请输入班级编号："
        '
        'TxtClassNum
        '
        Me.TxtClassNum.Location = New System.Drawing.Point(8, 200)
        Me.TxtClassNum.Name = "TxtClassNum"
        Me.TxtClassNum.TabIndex = 5
        Me.TxtClassNum.Text = ""
        '
        'LblClassNum
        '
        Me.LblClassNum.Location = New System.Drawing.Point(8, 176)
        Me.LblClassNum.Name = "LblClassNum"
        Me.LblClassNum.Size = New System.Drawing.Size(128, 23)
        Me.LblClassNum.TabIndex = 4
        Me.LblClassNum.Text = "请输入班级名称："
        '
        'CmbClassDep
        '
        Me.CmbClassDep.Location = New System.Drawing.Point(8, 152)
        Me.CmbClassDep.Name = "CmbClassDep"
        Me.CmbClassDep.Size = New System.Drawing.Size(120, 20)
        Me.CmbClassDep.TabIndex = 3
        '
        'LblClassDep
        '
        Me.LblClassDep.Location = New System.Drawing.Point(8, 128)
        Me.LblClassDep.Name = "LblClassDep"
        Me.LblClassDep.Size = New System.Drawing.Size(128, 23)
        Me.LblClassDep.TabIndex = 2
        Me.LblClassDep.Text = "请输入班级系别："
        '
        'CmbClassYear
        '
        Me.CmbClassYear.Location = New System.Drawing.Point(8, 96)
        Me.CmbClassYear.Name = "CmbClassYear"
        Me.CmbClassYear.Size = New System.Drawing.Size(120, 20)
        Me.CmbClassYear.TabIndex = 1
        '
        'LblClassYear
        '
        Me.LblClassYear.Location = New System.Drawing.Point(8, 72)
        Me.LblClassYear.Name = "LblClassYear"
        Me.LblClassYear.Size = New System.Drawing.Size(128, 23)
        Me.LblClassYear.TabIndex = 0
        Me.LblClassYear.Text = "请输入班级入学年份："
        '
        'FrmClass
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(432, 397)
        Me.Controls.Add(Me.GroupBox1)
        Me.Controls.Add(Me.TreeView1)
        Me.Name = "FrmClass"
        Me.Text = "班级管理"
        Me.GroupBox1.ResumeLayout(False)
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub FrmClass_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Load
        BindTree()
        BindCmbClassDep()
        addCmbClassYear(2000, 2005)
    End Sub

    Private Sub BindTree()
        CreateTreeFirst()
        CreateTreeSecond()
        CreateTreeThird()
        TreeView1.ExpandAll()
    End Sub

    Private Sub CreateTreeFirst()
        Try
            TreeView1.Nodes.Clear()
            Dim sql As String = "SELECT DISTINCT CLASSYEAR FROM CLASSINFO"
            Dim dt As DataTable = GetDataTable(sql)

            For i As Integer = 0 To dt.Rows.Count - 1
                TreeView1.Nodes.Add(dt.Rows(i)("classyear"))
            Next

        Catch ex As Exception
            WriteErr(ex)
        End Try
    End Sub

    Private Sub CreateTreeSecond()

        Try
            Dim sql As String = "SELECT DISTINCT B.DEPARTMENT,A.CLASSYEAR  FROM CLASSINFO A,DEPARTMENTINFO B WHERE A.DEPARTMENTID=B.DEPARTMENTID "
            Dim dt As DataTable = GetDataTable(sql)
            Dim node As TreeNode
            For Each node In TreeView1.Nodes
                For i As Integer = 0 To dt.Rows.Count - 1
                    If dt.Rows(i)("CLASSYEAR") = node.Text Then
                        node.Nodes.Add(dt.Rows(i)("DEPARTMENT"))
                    End If
                Next
            Next