Should you need to import your existing reports created with the Visual Studio Report Designer to Standalone Report Designer supported format, follow the approaches outlined below:
Default constructor is required and due to XML format restrictions Report and Item event handlers and methods can not be imported. Custom code like properties, events, methods, instantiated data objects will not be serialized along with the settings of the report.
(Optional) If the target report depends on external assemblies for data source, user function or custom aggregate, first you have to reference those assemblies in the configuration file. For more information see: Extending Report Designer
Open the Report Designer and click on Open Report...
In the Open dialog window, select .NET Report Library from the file type combobox.
Navigate to your existing .NET report library and click Open. The Import Report Wizard is started.
In the Select Reports to Import step, you would see the reflected reports from your report library.
Select the reports you would like to import by checking the corresponding checkboxes right next to the reports and click Next.
In the Output Settings step, you can specify the output location for the imported reports, their names or specify different location if you have more than one report.
Click Import. Once the import is done, you are presented with Import Summary step, which shows the result of the import and presents an import log. There is an option to open the imported reports in the standalone report designer once you click on Finish.