Asp.Net Core 5.0 SignalR with SQL Dependency

Question

Hello everyone and thanks for the help in advance. I am porting older Asp.Net 4.5 application to .Net Core 5. A few of these applications have SignalR with SQL Dependency notification which I ahve been unsuccessful in porting to the new platform. IN Google searching, it seems many have run into this same problem, but no one has found a solution. Is this simply not supported in .Net Core? Any help would be appreciated.

Answer 1

Hi @Kmcnet ,

I found this sample: database-change-notification-using-signal (using asp.net core 2.2) from Github, after upgrade the asp.net core version to Asp.net 5, the SQL Dependency notification still works well.

The part of modified code:

EmployeeRepository.cs:

The Startup:

The .csproj file:

<Project Sdk="Microsoft.NET.Sdk.Web">  
  
  <PropertyGroup>  
    <TargetFramework>net5.0</TargetFramework>    
  </PropertyGroup>  
  
  <ItemGroup>  
    <PackageReference Include="Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore" Version="5.0.11" />  
    <PackageReference Include="Microsoft.AspNetCore.Identity.EntityFrameworkCore" Version="5.0.11" />  
    <PackageReference Include="Microsoft.AspNetCore.Identity.UI" Version="5.0.11" />  
    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="5.0.11" />  
    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="5.0.11" />  
    <PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="5.0.2" />  
  </ItemGroup>  
  
  <ItemGroup>  
    <Folder Include="Migrations\" />  
  </ItemGroup>  
  
</Project>  

The result is like this:

More detail sample code, you can check the above Github link and the attachment.

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Best regards,
Dillion

Answer 2

Thanks for the response. I'm working through the example but my biggest question is this, at least seems, to sidestep the use of SignalR hubs like most of the examples. So I am confused on why this works.