there is not the source code of pdfviewer in the extensions https://github.com/iceteagroup/wisej-extensions
You can set your own PDF viewer source:
this.pdfViewer1.ViewerType = Wisej.Web.PdfViewerType.Custom;
this.pdfViewer1.ViewerURL = “pdfjs-1.9.426/web/viewer.html?file=[source]”;
The source can be an embedded resource within your application.
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