You do not need a custom report resolver for the Reporting WCf service, when you want to display TRDX files without modifications.
The viewer sends a string description of the report that has to be resolved and rendered (ReportViewer.Report property). If this string description contains a report type's assembly qualified name or a path to a TRDX file, the service will handle the resolving without additional settings.
The only requirement is:
- The assembly with the reports to be loaded in the domain of the service (add reference to the reports' project);
- If the TRDX file is specified via relative path, the path will be resolved based on the service's project execution folder.
On a side note, if you are still interested in working with custom report resolvers, please go through my colleague's explanation in this forum post
I hope the provided information is helpful.
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