t_login_infor.aspx.vb

该源代码包括了asp.net的整个实现过程

Public Class t_login_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 Button2 As System.Web.UI.WebControls.Button
    Protected WithEvents valid1 As System.Web.UI.WebControls.CompareValidator
    Protected WithEvents TextBox3 As System.Web.UI.WebControls.TextBox
    Protected WithEvents RegularExpressionValidator1 As System.Web.UI.WebControls.RegularExpressionValidator
    Protected WithEvents RequiredFieldValidator2 As System.Web.UI.WebControls.RequiredFieldValidator
    Protected WithEvents TextBox2 As System.Web.UI.WebControls.TextBox
    Protected WithEvents TextBox1 As System.Web.UI.WebControls.TextBox
    Protected WithEvents Label1 As System.Web.UI.WebControls.Label
    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
    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
        '取出cookie中的数据，显示欢迎信息
        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
        '数据库连接
        dsn = ConfigurationSettings.AppSettings("DSN_teacher")
        conn.ConnectionString = dsn
        cmd.Connection = conn
        Dim ds1 As DataSet = New DataSet
        Dim mydap1 As New SqlClient.SqlDataAdapter
        mydap1.SelectCommand = cmd
        '绑定教师基本信息登录名、登录密码
        If Not IsPostBack Then
            cmd.CommandText = "SELECT * FROM teacher_login WHERE t_id='" + teacher_id + "'"
            Try
                conn.Open()
                mydap1.Fill(ds1, "teacher_login")
                Dim mytable1 As New DataTable
                mytable1 = ds1.Tables("teacher_login")
                TextBox1.Text = mytable1.Rows(0)("t_id")
                TextBox2.Text = mytable1.Rows(0)("tl_pwd")
                TextBox3.Text = mytable1.Rows(0)("tl_pwd")
            Catch
                Label1.Text = "读取教师登录表失败，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 If
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        '提交修改结果
        cmd.CommandText = "update teacher_login set tl_pwd='" + TextBox2.Text + "' where t_id='" + TextBox1.Text + "'"
        Try
            conn.Open()
            cmd.ExecuteReader()
            Label1.Text = "修改成功！"
        Catch
            Label1.Text = "写入教师登录表失败，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