When deployed to IIS, DropDownBase OnParametersSet throws System.IO.FileNotFoundException for Microsoft.CSharp Version=7.0.0.0

techsc · March 24, 2023, 12:59pm

[2023-03-24T12:58:17.920Z] Error: System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.CSharp, Version=7.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file specified.
File name: 'Microsoft.CSharp, Version=7.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'
at Radzen.DropDownBase1.OnParametersSet() at Microsoft.AspNetCore.Components.ComponentBase.CallOnParametersSetAsync() at Microsoft.AspNetCore.Components.ComponentBase.RunInitAndSetParametersAsync() at Radzen.RadzenComponent.SetParametersAsync(ParameterView parameters) at Radzen.DataBoundFormComponent1.SetParametersAsync(ParameterView parameters)
at Radzen.DropDownBase1.SetParametersAsync(ParameterView parameters) at Radzen.Blazor.RadzenDropDown1.SetParametersAsync(ParameterView parameters)
log @ blazor.server.js:1
blazor.server.js:1 [2023-03-24T12:58:17.921Z] Information: Connection disconnected.
blazor.server.js:1 Uncaught (in promise) Error: Cannot send data if the connection is not in the 'Connected' State.
at Nt.send (blazor.server.js:1:54583)
at Ft._sendMessage (blazor.server.js:1:71306)
at Ft._sendWithProtocol (blazor.server.js:1:71347)
at Ft.send (blazor.server.js:1:71455)
at Object.beginInvokeDotNetFromJS (blazor.server.js:1:134889)
at w (blazor.server.js:1:2167)
at C.invokeMethodAsync (blazor.server.js:1:4035)
at MediaQueryList.callback (Radzen.Blazor.js:1292:20)
ds-cat-link-keys:1 Failed to load resource: the server responded with a status of 500 (Internal Server Error)
blazor.server.js:1 Uncaught (in promise) Error: Cannot send data if the connection is not in the 'Connected' State.
at Nt.send (blazor.server.js:1:54583)
at Ft._sendMessage (blazor.server.js:1:71306)
at Ft._sendWithProtocol (blazor.server.js:1:71347)
at Ft.send (blazor.server.js:1:71455)
at Object.beginInvokeDotNetFromJS (blazor.server.js:1:134889)
at w (blazor.server.js:1:2167)
at C.invokeMethodAsync (blazor.server.js:1:4035)
at MediaQueryList.callback (Radzen.Blazor.js:1292:20)

enchev · March 24, 2023, 1:03pm

This is what I’ve found, might be related also:

techsc · March 24, 2023, 1:16pm

Thank you,
I'm logged in as administrator.

I could prepare a windows for you to verify the problem.

enchev · March 24, 2023, 1:21pm

I've never seen such error before and honestly I'm not sure where to start. Looks like it is related to dynamics, Windows Hosting Bundle and IIS however I'm not sure how.

Please try to deploy the app to Folder, go to that folder and execute dotnet yourapp.dll to see if it will work normally.

enchev · March 24, 2023, 1:28pm

Can you send us the page with the entire code where you have the error with the DropDown? Do you have any usage of dynamic keyword in this page?

techsc · March 24, 2023, 1:32pm

I will send you the whole freshly generated project by email.

enchev · March 24, 2023, 1:38pm

Use Google Drive or similar if it’s too big. Does it work for you when deployed in folder?

techsc · March 24, 2023, 1:58pm

Hi, the email is sent.

Runnig from console dotnet yourapp.dll results the same.

Chris

akme · March 27, 2023, 5:37am

I'm having the same problem. Hours and hours trying to solve it. I couldn't solve the problem.

techsc · March 27, 2023, 5:49am

Update:
It seems to me that there's as dedployment setup configuration, which triggers the error int the Radzen Dropdown component.

Please verify:
At Visual Studio the Publish Deployment Mode

"Self-contained" OR
"Framework-dependent"

Mode

The error seems to be triggered
The error seems not to be triggered

So my current workaround is case 2).

2023-03-27-074910-500-135001-001
2023-03-27-074620-500-135001-001

enchev · March 27, 2023, 6:35am

Hi @techsc,

I see, unfortunately I'm afraid this is beyond our control - it's more likely an issue with the .NET in general. From what I've saw so far the issue is related to dynamics however after our last update Radzen.Blazor will not longer refer Microsoft.CSharp for .NET 7:

github.com

radzenhq/radzen-blazor/blob/master/Radzen.Blazor/Radzen.Blazor.csproj#L24-L36


      
            <ItemGroup>
              <PackageReference Include="LibSassBuilder" Version="2.0.1" />
              <PackageReference Include="Microsoft.AspNetCore.Components" Condition="'$(TargetFramework)' == 'netstandard2.1'" Version="3.1.0" />
              <PackageReference Include="Microsoft.AspNetCore.Components.Web" Condition="'$(TargetFramework)' == 'netstandard2.1'" Version="3.1.0" />
              <PackageReference Include="Microsoft.AspNetCore.Components" Condition="'$(TargetFramework)' == 'net5.0'" Version="5.0.0" />
              <PackageReference Include="Microsoft.AspNetCore.Components.Web" Condition="'$(TargetFramework)' == 'net5.0'" Version="5.0.0" />
          	<PackageReference Include="Microsoft.AspNetCore.Components" Condition="'$(TargetFramework)' == 'net6.0'" Version="6.0.0" />
          	<PackageReference Include="Microsoft.AspNetCore.Components.Web" Condition="'$(TargetFramework)' == 'net6.0'" Version="6.0.0" />
          	<PackageReference Include="Microsoft.AspNetCore.Components" Condition="'$(TargetFramework)' == 'net7.0'" Version="7.0.0" />
          	<PackageReference Include="Microsoft.AspNetCore.Components.Web" Condition="'$(TargetFramework)' == 'net7.0'" Version="7.0.0" />
          	<PackageReference Include="Microsoft.CSharp" Version="4.7.0" Condition="'$(TargetFramework)' == 'netstandard2.1'"/>
              <PackageReference Include="System.Linq.Dynamic.Core" Version="1.2.22" />
            </ItemGroup>

Even if we stop using dynamic keyword in our assembly (it's going to be breaking change) you might have the same problem if you use it in your own code or in other third party libraries.

techsc · March 27, 2023, 6:37am

For the time being: I will publish as framework-dependent then.

techsc · March 27, 2023, 6:42am

But I'd like to add:
The problem is still present with the latest Radzen 4.8.0 Release.
So, my workaround to publish as framework-dependent is required with that Radzen version as well.

enchev · March 27, 2023, 6:43am

The problem, very likely, cannot be resolved with Radzen.Blazor update in my opinion.

techsc · March 27, 2023, 6:44am

Thank you for the clarification.

Gareth_Hill · March 27, 2023, 7:07am

Thanks again for your investigation work on this. My application worked for about two days following my update to 4.8.0 before breaking again. I'll see if I can get our IT department to install the hosting bundle on the server and try a framework dependent deployment instead.

Gareth_Hill · March 27, 2023, 7:57am

Oddly enough, I've just tried the application again this morning and it's working. It seems to be a rather intermittent problem.

techsc · March 27, 2023, 9:10am

Yes, it is unpredictable. But after some time, the error comes up while sticking on the self-contained deployment. I promise

Bjorn_at_Eton · May 8, 2023, 5:58am

Has anyone come any further on this? This is the only hit on this topic on google

My team and I are developing a .Net core application, and it works up until a specific commit.
What is increasingly weird is that it works locally, does not work when published locally and deployed to a customer server, does work when using Azure DevOps to build the artifact.
Could it be a difference in version of the build program? Anyone else experienced this?

korchev · May 8, 2023, 6:06am

Hi @Bjorn_at_Eton,

It was discovered that self-contained deployments do not include all the required files such as Microsoft.CSharp.dll (used when the application relies on the dynamic keyword). The workaround is to not use self-contained deployment but to rely on the .NET framework installed on the server.