t_class_infor.aspx.vb

教务实验课选课系统

Public Class t_class_infor
    Inherits System.Web.UI.Page

#Region " Web 窗体设计器生成的代码 "

    '该调用是 Web 窗体设计器所必需的。
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()

    End Sub
    Protected WithEvents Label2 As System.Web.UI.WebControls.Label
    Protected WithEvents DataGrid1 As System.Web.UI.WebControls.DataGrid
    Protected WithEvents Label1 As System.Web.UI.WebControls.Label
    Protected WithEvents Button1 As System.Web.UI.WebControls.Button
    Protected WithEvents DropDownList1 As System.Web.UI.WebControls.DropDownList
    Protected WithEvents HyperLink1 As System.Web.UI.WebControls.HyperLink
    Protected WithEvents HyperLink2 As System.Web.UI.WebControls.HyperLink
    Protected WithEvents LinkButton1 As System.Web.UI.WebControls.LinkButton
    Protected WithEvents Image1 As System.Web.UI.WebControls.Image
    Protected WithEvents spWelMessage As System.Web.UI.HtmlControls.HtmlGenericControl

    '注意: 以下占位符声明是 Web 窗体设计器所必需的。
    '不要删除或移动它。
    Private designerPlaceholderDeclaration As System.Object

    Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init
        'CODEGEN: 此方法调用是 Web 窗体设计器所必需的
        '不要使用代码编辑器修改它。
        InitializeComponent()
    End Sub

#End Region
    Dim dsn As String
    Dim conn As New SqlClient.SqlConnection
    Dim cmd As New SqlClient.SqlCommand
    Dim ds1 As DataSet = New DataSet
    Dim mydap1 As New SqlClient.SqlDataAdapter
    Dim teacher_id As String '取出教师登录s_id
    Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        '在此处放置初始化页的用户代码
        '1、取出cookie中的数据
        Dim teacher_id As String = Request.Cookies("userInf").Values("userID")
        If DateTime.Now.Hour >= 6 And DateTime.Now.Hour < 12 Then
            spWelMessage.InnerHtml = "早上好，" & Request.Cookies("userInf").Values("userID") & Request.Cookies("userInf").Values("userIdent")
        ElseIf DateTime.Now.Hour >= 12 And DateTime.Now.Hour < 18 Then
            spWelMessage.InnerHtml = "下午好，" & Request.Cookies("userInf").Values("userID") & Request.Cookies("userInf").Values("userIdent")
        Else
            spWelMessage.InnerHtml = "晚上好，" & Request.Cookies("userInf").Values("userID") & Request.Cookies("userInf").Values("userIdent")
        End If
        '连接数据库()
        dsn = ConfigurationSettings.AppSettings("DSN_teacher")
        conn.ConnectionString = dsn
        cmd.Connection = conn
        mydap1.SelectCommand = cmd
    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        '此函数完成的功能：将数据在datagrid1中显示出来，并且计算该班的人数
        '选择班级，点击此按钮后显示该班的学生名单   
        cmd.CommandText = "select student_infor.s_id,student_infor.s_name,group_id,seat_id from student_infor,class_student where student_infor.s_id=class_student.s_id and class_id='" + DropDownList1.SelectedItem.Value + "' order by seat_id asc"
        Try
            conn.Open()
            mydap1.Fill(ds1, "student_class_infor")
            DataGrid1.DataSource = ds1.Tables("student_class_infor")
            DataGrid1.DataBind()
        Catch
            Label2.Text = "读取数据库失败，可能是服务器出现错误，请稍后再试！非常抱歉影响了您的工作！"
        Finally
            conn.Close()
        End Try

        '计算该班的人数
        cmd.CommandText = "select * from class_student where class_id='" + DropDownList1.SelectedItem.Value + "'"
        Try
            conn.Open()
            mydap1.Fill(ds1, "class_student_count")
            Label1.Text = ds1.Tables("class_student_count").Rows.Count
        Catch
            Label2.Text = "读取班级学生表失败，可能是服务器出现错误，请稍后再试！非常抱歉影响了您的工作！"
        Finally
            conn.Close()
        End Try
    End Sub

    Private Sub LinkButton1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles LinkButton1.Click
        Response.Redirect("../login.aspx")
    End Sub

End Class