We use cookies to give you the best experience on our website. If you continue to browse, then you agree to our privacy policy and cookie policy. Image for the cookie policy date
Starting in 2019, the Reporting control is no longer included in Essential Studio. If you're experiencing issues with the Syncfusion Reporting Platform, Report Viewer, Report Designer, or Report Writer, we recommend migrating to Bold Reports, our dedicated reporting platform.

Bold Reports offers a comprehensive suite of tools and features for all your reporting needs, and we will help you make a smooth transition from the discontinued control. Our support team at https://support.boldreports.com/ is here to assist you with any questions or difficulties you may encounter during the migration process.

We thank you for choosing Syncfusion and appreciate your understanding.

Local Report Rendering in 2.1 But Fails in 3.0

Downloaded and executed the following example solution provided in a previous thread:
ReportSample_core797180486.zip (Core 2.1)
After adding a local .rdl report, we were able to connect to a SQL database and render the report without issue.

Problem: Created a new project in asp.net Core 3.0 adding the same file structure and nuget packages. When the report (index) page loads in Core 3, the following error is shown in the report view:

Unable to cast object of type 'System.Text.Json.JsonElement' to type 'System.String'.

Any help would be greatly appreciated.
Note: using the trial package and files.

3 Replies

VS Vinoth Srinivasan Syncfusion Team October 16, 2019 06:53 AM UTC

Hi Paul, 
In our ASP.NET Core Report Viewer application we are using Json.NET serializer for ReportService which has been removed from ASP.NET Core 3.0 shared framework. So, could you please use AddNewtonsoftJson() with services to works with Json.NET serializer as per the migration information in below link,   
1.      Add a package reference to Microsoft.AspNetCore.Mvc.NewtonsoftJson 
2.      Update Startup.ConfigureServices to call AddNewtonsoftJson 
public void ConfigureServices(IServiceCollection services)  
Vinoth S. 

BC Bevan Coaton October 16, 2019 03:36 PM UTC

Thank you very much.  Worked like a charm.

MS Mahendran Shanmugam Syncfusion Team October 17, 2019 05:20 AM UTC

Hi Paul,  

Thanks for your update. 

We are happy your issue was resolved. 

Mahendran S. 

Live Chat Icon For mobile
Up arrow icon