You can display an aspx page inside RadToolTip by setting an IFRAME element with SRC pointing to that ASPX between the RadToolTip tags, e.g.
<telerik:RadToolTip ManualClose="true" Position="BottomRight" runat="server" ID="RadToolTip1" TargetControlID="link1" Width="250px" Height="300px" >
<iframe src="Default2.aspx" style="width:100%;height:100%" frameborder="0" id="externalPage"></iframe></telerik:RadToolTip>
you can also pass data between the two pages like so...
Example:
default.aspx page
<
body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<telerik:RadToolTip ManualClose="true" Position="BottomRight" runat="server" ID="RadToolTip1" TargetControlID="link1" Width="250px" Height="300px" >
<iframe src="Default2.aspx" style="width:100%;height:100%" frameborder="0" id="externalPage"></iframe>
</telerik:RadToolTip>
<asp:LinkButton ID="link1" runat="server">LinkButton</asp:LinkButton>
<input type="button" onclick="PassValue()" />
<input type="text" id="mainInput" value="sample content" />
<script type="text/javascript">
function PassValue()
{
var iframe = document.getElementById("externalPage");
if(iframe)
{
iframe.contentWindow.document.getElementById(
"dialogInput").value = document.getElementById("mainInput").value;
}
}
</script>
</form>
</
body>
default2.aspx page
<
body>
<form id="form1" runat="server">
<div id="Dialog">
<input type="text" id="dialogInput"/>
<input type="button" onclick="PassValueToMain()" />
<script type="text/javascript">
function PassValueToMain()
{
window.parent.document.getElementById(
"mainInput").value = document.getElementById("dialogInput").value;
}
</script>
</div>
</form>
</
body>