Hi Tim,
The built-in report parameters' purpose is to provide basic UI that is available out of the box and that is enough for most scenarios. For other cases, when you require customization, you can hide all report parameters (Visible=false), create a custom parameter area and wire it up to the
Report API e.g. use RadComboBox for ASP.NET AJAX control and pass the input via the report API:
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Greetings,
Steve
the Telerik team