Public Class t_class_infor
    Inherits System.Web.UI.Page

#Region " Web 窗體設計器生成的代碼 "

    '該調用是 Web 窗體設計器所必需的。
    <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: 以下占位符聲明是 Web 窗體設計器所必需的。
    '不要刪除或移動它。
    Private designerPlaceholderDeclaration As System.Object

    Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init
        'CODEGEN: 此方法調用是 Web 窗體設計器所必需的
        '不要使用代碼編輯器修改它。
        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 '取出教師登錄s_id
    Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        '在此處放置初始化頁的用戶代碼
        '1、取出cookie中的數據
        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
        '連接數據庫()
        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
        '此函數完成的功能：將數據在datagrid1中顯示出來，并且計算該班的人數
        '選擇班級，點擊此按鈕后顯示該班的學生名單   
        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 = "讀取數據庫失敗，可能是服務器出現錯誤，請稍后再試！非常抱歉影響了您的工作！"
        Finally
            conn.Close()
        End Try

        '計算該班的人數
        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 = "讀取班級學生表失敗，可能是服務器出現錯誤，請稍后再試！非常抱歉影響了您的工作！"
        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