Setting the viewer's ReportSource will refresh the viewer:
clientReportSource.IdentifierType = Telerik.ReportViewer.Html5.WebForms.IdentifierType.TypeReportSource
'or <namespace>.<class>, <assembly> e.g. "MyReports.Report1, MyReportsLibrary"
reportViewer1.ReportSource = clientReportSource
In case you need to refresh manually, this can be done from the client side using a refreshReport() method
reportViewer = $(
Report can be previewed in Interactive mode and Print preview mode in the report viewer - Interactive vs. Print Layout
. Switching between those two modes is done through the viewer's toolbar.
Send us some screen shots that demonstrate the problematic behavior in print preview so we can understand the scenario more clearly.
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