ReportViewer Control – Height issue

This is the way I fixed, take a look

<div style="Width:auto;"> 
<form id="form1" runat="server" style="width:100%; height:100%;">
    <asp:ScriptManager ID="ScriptManager1" runat="server">
    </asp:ScriptManager>
    <rsweb:ReportViewer ID="rptViewer" runat="server" Width="100%" Height="100%" AsyncRendering="False" SizeToReportContent="True">
    </rsweb:ReportViewer>
</form></div>

The thing doing the magic is AsyncRendering=”False” SizeToReportContent=”True” the rest is basic HTML. The report will be displayed as it was designed.

There might be some code extra, but see if it works for you.

Hope it helps