frmcourse.vb

“代码”目录下的程序

Public Class frmCourse
    Inherits 教务管理系统.frmBase
    Private dtList As DataTable
#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。
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        '
        'frmCourse
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(608, 277)
        Me.Name = "frmCourse"

    End Sub

#End Region
    Public Overrides Sub Prepare()
        Me.Text = "课表查询"
        Me.dgdList.Dock = DockStyle.Fill
        Me.ToolBar1.Visible = False
        Me.Label1.Text = "  学号"
        Me.Label2.Text = "  姓名"
        Me.Label3.Text = "  班级"
        Me.txbTwo.ReadOnly = True
        Me.txbThree.ReadOnly = True
        InitDataTable()
    End Sub
    Private Sub InitDataTable()
        dtList = New DataTable
        dtList.Columns.Add("星期一")
        dtList.Columns.Add("星期二")
        dtList.Columns.Add("星期三")
        dtList.Columns.Add("星期四")
        dtList.Columns.Add("星期五")
        Dim dr As DataRow
        For i As Integer = 0 To 9
            dr = dtList.NewRow
            dtList.Rows.Add(dr)
        Next
    End Sub
    Public Overrides Sub LoadData()
        Dim strFilter As String = ""
        If txbOne.Text.Trim.Length = 0 Then
            Return
        Else
            strFilter = " and 学号='" + txbOne.Text.Trim + "'"
        End If

        Dim db As DataBase = New DataBase
        Dim strSQL As String = "select 姓名, 班级名称 from 学生信息 as a, 班级信息 as b where a.班级编号=b.班级编号 and 学号='" + Me.txbOne.Text.Trim + "'"
        Dim dv As DataView = db.RunSelectSQL(strSQL)
        If dv.Count = 0 Then
            MessageBox.Show("学号错误！")
            Exit Sub
        End If
        Me.txbTwo.Text = dv(0)(0).ToString.Trim
        Me.txbThree.Text = dv(0)(1).ToString.Trim
        strSQL = "select b.课程名称,a.上课时间天,a.上课时间节,a.上课地点 from 选课表 as c, 课程表 as a, 课程信息 as b where a.课程编号=b.课程编号 and c.课序号=a.课序号"
        dtData = db.RunSelectSQL(strSQL + strFilter + " order by a.课序号 ").Table
        db.Dispose()
            For m As Integer = 0 To 4
                For n As Integer = 0 To 9
                    dtList.Rows(n)(m) = ""
                Next
            Next
        Dim col, line As Integer
        For i As Integer = 0 To dtData.Rows.Count - 1
            col = CInt(dtData.Rows(i)(1).ToString) - 1
            line = CInt(dtData.Rows(i)(2).ToString) - 1
            dtList.Rows(line)(col) = dtData.Rows(i)(0).ToString.Trim + ControlChars.CrLf + dtData.Rows(i)(3).ToString.Trim
        Next
    End Sub
    Public Overrides Sub SetDataGrid()
        LoadData()
        '定义一个DataGrid表样式
        Dim ts As New DataGridTableStyle
        Dim aColumnTextColumn As DataGridTextBoxColumn
        Dim numCols As Integer = dtList.Columns.Count
        Dim i As Integer
        For i = 0 To numCols - 1
            aColumnTextColumn = New DataGridTextBoxColumn
            aColumnTextColumn.MappingName = _
            dtList.Columns(i).ColumnName
            aColumnTextColumn.HeaderText = _
            dtList.Columns(i).ColumnName
            aColumnTextColumn.NullText = ""
            aColumnTextColumn.ReadOnly = True
            aColumnTextColumn.Width = 130
            ts.GridColumnStyles.Add(aColumnTextColumn)
        Next
        ts.PreferredRowHeight = 30
        ts.AlternatingBackColor = Color.LightGray
        ts.AllowSorting = False
        ts.MappingName = dtList.TableName
        dgdList.TableStyles.Clear()
        dgdList.TableStyles.Add(ts)
        Dim dv As DataView = dtList.DefaultView
        dv.AllowNew = False
        dv.AllowDelete = False
        dv.AllowEdit = False
        '设置数据源
        dgdList.DataSource = dtList.DefaultView
    End Sub
    Private Sub txbOne_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles txbOne.KeyDown
        If e.KeyCode = Keys.Enter Then
            SetDataGrid()
        End If
    End Sub
End Class