验证控制不会阻止对服务器的回发请求

<asp:textbox id=\"tbNewSvrLic\" runat=\"server\" Text=\"0\" BackColor=\"#FFFFA0\" />

<asp:RangeValidator id=\"NewSvrLicValidator\" ControlToValidate=\"tbNewSvrLic\"
    runat=\"server\" Type=\"Integer\" MinimumValue=\"0\"  MaximumValue=\"5\"
    errormessage=\"Invalid value specified for Additional Server Licenses\"
    Display=\"Dynamic\"  />

<asp:button id=\"btnOrderSummary\" OnClick=\"btnOrderSummary_Click\"
    runat=\"server\" text=\"Display\" Visible=\"False\" />