We have tested the described scenario on our end. When the report parameter is required (AllowNull = False
, AllowBlank = False
, and no default value) the report is not rendered in the viewer. Instead the following error message is displayed: error message
Currently, this is the default behavior of the HTML5 Report Viewer. We have plans to make the error message more user friendly in a future version of the Reporting suite.
In the meantime you can manually handle the scenario when the report parameter is not supplied with a value. Set the AllowBlank/AllowNull
property to True
and then if the parameter is blank/null, suppress some of the sections in the report and provide an appropriate error message via a text box in the report header section.
Check out the Telerik Platform - the only platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native mobile apps.