jiaoshiguanli.aspx.vb

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Imports System.Data
Imports System.Data.OleDb
Partial Class jiaoshiguanli
    Inherits System.Web.UI.Page

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Label1.Text = Session("yonghuming")
    End Sub

    Protected Sub Button2_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button2.Click
        Session("yonghuming") = Label1.Text
        Response.Redirect("guanliyuan.aspx")
    End Sub

    Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim MyCon1 As New OleDbConnection()
        Dim cmd1 As New OleDbCommand()
        Dim cmd2 As New OleDbCommand()

        Dim reader1 As OleDbDataReader

        MyCon1.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & Server.MapPath("db1.mdb")
        MyCon1.Open()
        cmd1.Connection = MyCon1
        cmd1.CommandType = CommandType.Text
        cmd1.CommandText = "select * from yonghu where 用户名='" & TextBox1.Text & "'"
        reader1 = cmd1.ExecuteReader()
        If reader1.Read = True Then

            Response.Write("<script language = vbscript>alert""用户名已存在""</script>")
            reader1.Close()
            cmd1.Cancel()
        Else
            cmd2.Connection = MyCon1
            cmd2.CommandType = CommandType.Text
            cmd2.CommandText = "insert into yonghu(用户名,密码,等级) values('" & TextBox1.Text & "','" & TextBox2.Text & "','1')"
            cmd2.ExecuteNonQuery()
            cmd2.Cancel()
           
        
            MyCon1.Close()

        End If
    End Sub
End Class