WebForms ClientExportManager Overview
RadClientExportManager for ASP.NET AJAX is a control that allows the user to export a specific DOM element or the entire page to a PDF document, image or scalable vector graphics (SVG) document. It is available since the Q1 2015 release.
The Client Export Manager is part of Telerik UI for ASP.NET AJAX, a
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RadClientExportManager is built on top of the Kendo UI Drawing API and supports compression via the JavaScript pako library . Compression can make a big difference in the output file size when you're using custom TTF fonts or images with alpha channel (i.e. PNGs with transparency).