这个是可以正常运行，放到那个分区也不可以运行了，这种事如何解释。
Partial Class show
    Inherits System.Web.UI.Page

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
      
        'Response.Write(i)
    End Sub

    Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim conn = New Data.OleDb.OleDbConnection("Provider=Microsoft.Jet.OleDb.4.0;Data Source=" & Server.MapPath("mdb.mdb"))
        Dim sql As String = "select * from dcontd"
        Dim comm = New Data.OleDb.OleDbCommand(sql, conn)
        conn.open()
        Dim ds As Data.OleDb.OleDbDataReader
        ds = comm.ExecuteReader()

        While (ds.Read())
            Response.Write(Convert.ToSingle(ds("id")))
            Response.Write("<br>")
            Response.Write(Convert.ToString(ds("dotype")))
            Response.Write("<br>")
            Response.Write(Convert.ToString(ds("dtext")))
            Response.Write("<br>" & "新记录：")
            Response.Write(Convert.ToString(ds("daddress")))
            Response.Write("<br>")
        End While
        ds.Close()
        conn.close()

        Dim sqll As String = "insert into dcontd(daddress,dtext)values('" + user.Text + "','" + pwd.Text + "')"
        Dim con = New Data.OleDb.OleDbConnection("Provider=Microsoft.Jet.OleDb.4.0;Data Source=" & Server.MapPath("mdb.mdb"))
        con.open()
        Dim cc = New Data.OleDb.OleDbCommand(sqll, con)
        cc.executenonquery()



    End Sub
End Class

因为user是sql的保留字，你加上[]就可以了……