The Old ASP.NET Webforms ReportViewer Messes Up Reports Rendering on iPad and Other Mobile Devices

Environment

Product	Progress® Telerik® Reporting
Version	Q2 2012 and later
Report Viewers	Legacy ASP.NET WebForms Viewer

Description

The described scenario and suggested solution relate to the legacy ASP.NET WebForms ReportViewer. It is recommended that you migrate to the HTML5 ReportViewer.

The old ASP.NET Webforms ReportViewer does not display reports or the page area is messed on iPad and other mobile devices.

Cause

The old ASP.NET WebForms ReportViewer displays content in the browser by using iframe and table elements, which may break the layout in modern HTML5-compliant browsers.

Solution

To solve this issue, use an older DOCTYPE declaration.