No service for type 'Microsoft.Extensions.Localization.IStringLocalizer`1[MyProject.Localization.MyProjectResource]' has been registered. #4146 | Support

ageiter created 2 years ago

ABP Framework version: v6.0.1
UI type: Blazor Server
DB provider: EF Core
Exception message and stack trace: No service for type 'Microsoft.Extensions.Localization.IStringLocalizer`1[MyProject.Localization.MyProjectResource]' has been registered.

This is actually the same question as @balessi75 has already asked here: #3862

I want to use my string resources in a DTO (MyProject.Application.Contracts).

public IEnumerable&lt;ValidationResult&gt; Validate(ValidationContext validationContext)
{
    var results = new List&lt;ValidationResult&gt;();
    var l = validationContext.GetRequiredService&lt;IStringLocalizer&lt;MyProjectResource&gt;>();
    var errorMessage = l["Entity:DocumentType:IsRequired:ValidationText"].Value;
    
    ...
    
    return results;
}

Unfortunately, I have not figured out how to register the IStringLocalizer correctly. I have read the mentioned documentation and searched for it, but somehow it doesn't work for me. I always get the following error message:

Unhandled exception rendering component: No service for type 'Microsoft.Extensions.Localization.IStringLocalizer`1[MyProject.Localization.MyProjectResource]' has been registered.
System.InvalidOperationException: No service for type 'Microsoft.Extensions.Localization.IStringLocalizer`1[MyProject.Localization.MyProjectResource]' has been registered.
   at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType)
   at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService[T](IServiceProvider provider)
   at MyProject.Shared.DocumentDependentBase.Validate(ValidationContext validationContext) in

Can you tell me how to register it in my module?

10 Answer(s)

0

maliming created 2 years ago
Support Team Fullstack Developer

hi

Can you share a project to reproduce the problem? liming.ma@volosoft.com
0

ageiter created 2 years ago

I wanted to make an example project, but there it works. I haven't figured out where the difference is and why it doesn't work in my other project...
0

maliming created 2 years ago
Support Team Fullstack Developer

I also have no idea.

ageiter created 2 years ago

I have now been able to recreate the problem in a test project. I have emailed you the OneDrive download link for the test project.

In order for you to reproduce this, you need to create and save a new test element in my project.

I use the ObjectGraphDataAnnotationsValidator to validate a more complex object (doesn't make sense in the example, of course, but I had to include it since it's probably part of the problem).

Tests.razor (sorry, I had to change the HTML code so I could paste it here):

< EditForm id="CreateTestForm" EditContext="NewTestDataContext">
            
    < ObjectGraphDataAnnotationsValidator />

    < ModalHeader>
        < ModalTitle>@L["NewTest"]</ModalTitle>
        < CloseButton Clicked="CloseCreateTestModalAsync" />
    < /ModalHeader>
    < ModalBody>

        < Validation>
            < Field>
                < FieldLabel>@L["DocumentName"]</FieldLabel>
                < TextEdit @bind-Text="@NewTest.Document.DocumentName">
                    < Feedback>
                        < ValidationError />
                    < /Feedback>
                < /TextEdit>
            < /Field>
            < ValidationMessage For="() => NewTest.Document.DocumentValidation"></ValidationMessage>
        < /Validation>

    < /ModalBody>
    < ModalFooter>
        < Button Color="Color.Secondary" Clicked="CloseCreateTestModalAsync">
            @L["Cancel"]
        < /Button>
        < SubmitButton Form="CreateTestForm" Clicked="CreateTestAsync" />
    < /ModalFooter>
< /EditForm>

When validating DocumentDto.cs the error happens:

public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
{
    var results = new List<ValidationResult>();

    // This is not working when using EditContext !!!
    var l = validationContext.GetRequiredService<IStringLocalizer<Abp4146Resource>>(); 
    var errorMessage = l["Test:ValidationMessage"].Value;

    // Do some validation

    results.Add(new ValidationResult(errorMessage, new[] { nameof(DocumentValidation) }));
    
    return results;
}

Exception: System.InvalidOperationException: 'No service for type 'Microsoft.Extensions.Localization.IStringLocalizer`1[Abp4146.Localization.Abp4146Resource]' has been registered.'

What I found out: If I don't use the EditContext for the EditForm, but the model, then it works. But in my concrete project I need the EditContext...

This is working: <EditForm id="CreateTestForm" Model="@NewTest"> This is NOT working: <EditForm id="CreateTestForm" EditContext="NewTestDataContext">

maliming created 2 years ago

Support Team Fullstack Developer

For blazor

public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
{
    var results = new List<ValidationResult>();

    // This is not working when using EditContext !!!
    var l = validationContext.GetService<IStringLocalizer<Abp4146Resource>>();
    if (l != null)
    {
        var errorMessage = l["Test:ValidationMessage"].Value;

        // Do some validation

        results.Add(new ValidationResult(errorMessage, new[] { nameof(DocumentValidation) }));
    }

    return results;
}

0

ageiter created 2 years ago

What does that mean exactly? It is not possible with Blazor? If yes, why? Or you have found a bug that you are going to fix?

Because for me your "solution" means that I can't output multilingual validation messages.
0
maliming created 2 years ago
Support Team Fullstack Developer
hi

This line doesn't set the ServiceProvider of ValidationContext

if (NewTestDataContext.Validate() == false) { return; }
0
ageiter created 2 years ago
hi

This line doesn't set the ServiceProvider of ValidationContext

if (NewTestDataContext.Validate() == false) { return; }

I know that, but it would be interesting to know how I would have to do it... setting the ServiceProvider.
0

maliming created 2 years ago
Support Team Fullstack Developer

You can't. : ( This is designed by blazor.
0

ageiter created 2 years ago

Ok, I have now applied a workaround to solve the problem.

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