Hello xie yufei,
As we have advised in your previous thread, try forcing the viewer to repaint itself in the pane. To do that you should hook up to the OnClientResized
event and invoke the AdjustReportAreaHeight method e.g.:
<telerik:RadPane runat="server" ID="ViewerPane" Scrolling="None" OnclientResized="resizeViewer">
<uc1:ReportViewer ID="ReportViewer1" runat="server" />
Another thing you can try is remove the doctype declaration from your page or use a less restricting one, like <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">.
If this does not resolve the issue, use a tool like Firebug
or IE Developer Toolbar
for identifying what those spaces are.
the Telerik team
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