Get the element causing submit in EditContext.OnValidationRequested method

[Kahbazi]

I'm writing a validation system for blazor and I want to validate my form based on how it get submitted. How can I achieve that?

Here's a sample of what I'm trying to do

@using FluentValidation;

<EditForm Model="@exampleModel">
    <InputNumber @bind-Value="exampleModel.Number" />
    <InputText @bind-Value="exampleModel.AcceptNote" />
    <InputText @bind-Value="exampleModel.RejectNote" />
    <button id="btnAccept" type="submit">Accept</button>
    <button id="btnReject" type="submit">Reject</button>
</EditForm>

@code {

    [CascadingParameter] public EditContext EditContext { get; set; }

    private ExampleModel exampleModel = new ExampleModel();

    protected override void OnInitialized()
    {
        EditContext.OnValidationRequested += (sender, args) =>
        {
            var validator = new ExampleModelValidator();
            var editContext = (EditContext)sender;

        // I want to know which element/component submit the form so I can choose the correct RuleSet

        validator.Validate(editContext.Model, ruleSet: "ACCEPT_OR_REJECT");
        };
    }

    public class ExampleModel
    {
        public string AcceptNote { get; set; }
        public string RejectNote { get; set; }
        public int Number { get; set; }
    }

    public class ExampleModelValidator : AbstractValidator<ExampleModel>
    {
        public ExampleModelValidator()
        {
            RuleSet("Accept", () =>
            {
                RuleFor(x => x.AcceptNote).NotNull();
                RuleFor(x => x.Number).GreaterThan(0);
            });

            RuleSet("Reject", () =>
            {
                RuleFor(x => x.RejectNote).NotNull();
                RuleFor(x => x.Number).GreaterThan(0);
            });
        }
    }
}

Describe the solution you'd like

I think the solution is that if it's possible somehow the element or component that causes Submit should be passed to EditForm.OnSubmit event, and then to EditContext.Validate and finally to EditContext.OnValidationRequested.

[mrpmorris]

When you say the element causing the submit, do you mean the button the user clicks to submit the form or something else?

[mkArtakMSFT]

Thanks for contacting us. A more idiomatic way to do this in Blazor would be for the event handler to be a lambda that passes a parameter from each case.