Render page error

Radzen Blazor Studio
1

Trying to open an older radzen project in studio and getting this on trying to render a page:

Radzen.Server.CompilationFailedException: C:\dev\test\VideoATMSTest\server\Pages\DisplayControl.razor.cs(37,25): error CS0029: Cannot implicitly convert type 'System.Collections.Generic.List<VideoAtmsTest.Pages.DropDownBase>' to 'System.Collections.Generic.List<VideoAtmsTest.Pages.DropDownBase>'

Here's the code at the error location:

    public List<DropDownBase> displays { 
        get
        {
            return (globals.displays);          <<<<<<<<<HERE
        }
    }

Where:

public partial class GlobalsService
{
    public List<DropDownBase> displays { get; set; } = new List<DropDownBase>();
}

Any ideas?

2

Maybe you have a page/custom component DropDownBase named after our base class for DropDown, DropDownDataGrid, etc.

3

This project opens and renders the page fine in the older Radzen, plus the Visual Studio build of it will compile and run with no errors? I'll check the class naming, but this seems like a bug in the rendering engine?

4

Changed the class names, still same problem. Oh well, the project will compile and run ok, I just can't use the wysiwyg editor to design the pages....I'll see if I can still use the old Radzen to do it....

Radzen.Server.CompilationFailedException: C:\dev\test\VideoATMSTest\server\Pages\DisplayControl.razor.cs(37,25): error CS0029: Cannot implicitly convert type 'System.Collections.Generic.List<VideoAtmsTest.Pages.DropDownBaseTDF>' to 'System.Collections.Generic.List<VideoAtmsTest.Pages.DropDownBaseTDF>'

at Radzen.Server.ProjectContext.Compile(Compilation compilation, AssemblyLoadContext context)
at Radzen.Server.ProjectContext.Compile(Compilation compilation)
at Radzen.Server.ProjectServer.Compile(String fileName, String source, RazorProjectEngine projectEngine)
at Radzen.Server.ProjectServer.CompilePage(String fileName, String source, RazorProjectEngine engine)
at Radzen.Server.ProjectServer.Render(String fileName, String source, Boolean renderLayout)
at Radzen.Server.ProgramController.Render(RenderRequest request)

5

Yeh, the old Radzen still works...I'll just use it. Still unsure why the error indicates some type of casting error for the exact same type?? Odd? Like cannot convert type string to string.....strange??

6

Hi @terryfryar,

This is the first time we see this problem so we can't really comment what is causing it. You can send us your app to info@radzen.com and we would troubleshoot further. Alternatively you can tell us how to reproduce it in a new app.