关于水晶报表显示数据的问题，请高人指点，谢谢！！！

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
Dim MyCookie As HttpCookie = Request.Cookies("ynnw")
Dim Uid As String = MyCookie.Values("Uid").ToString()

InitializeComponent()
Dim report As ReportDocument = New ReportDocument()
report.Load(Server.MapPath("\耕地\查询耕地土种基本信息.rpt"), OpenReportByTempCopy)
Dim MyLogonInfo As TableLogOnInfo = report.Database.Tables.Item("CD_GDXX").LogOnInfo()
MyLogonInfo.ConnectionInfo.DatabaseName = "wsj"
MyLogonInfo.ConnectionInfo.ServerName = "WsjOrcl"
MyLogonInfo.ConnectionInfo.UserID = "wsj"
MyLogonInfo.ConnectionInfo.Password = "wsj2002"
report.Database.Tables.Item("CD_GDXX").ApplyLogOnInfo(MyLogonInfo)
CrystalReportViewer1.ReportSource = report
CrystalReportViewer1.DisplayToolbar = True
CrystalReportViewer1.PageToTreeRatio = 5
CrystalReportViewer1.BestFitPage = True
CrystalReportViewer1.DataBind()
End Sub
用上面的代码，并且在水晶报表“查询耕地土种基本信息.rpt”中插入了“县名称”分组，能够实现把表“CD_GDXX”中的所有数据在网页上以“县名称”为分组显示出来。
现在我要在网页上只显示“Uid”用户（即登录县）的数据，请问该怎么做才能实现呢？我通过session不能把“Uid”的值传到水晶报表文件“查询耕地土种基本信息.rpt”中去，所以没法用水晶报表中的“公式编辑器”达到目的啊。
谢谢各位高人指点！！！

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