Data Annotation Validation for MudSelect in Multiple Mode

Bug type

Component

Component name

MudSelect

What happened?

When MudSelect is in Multiple Selection mode ( with MultiSelection="true" ) and its SelectedValues is bound to IEnumerable<TItem>, an Expression of Func<IEnumerable<TItem>> can not be assigned to For property :the For property expects a Func<TItem>, but the real bound property is of type IEnumerable<TItem>. so the Data Annotation Validation can not be used with MudSelect in Mltiple Mode.

Expected behavior

for Mudselect component with MultiSelection="true" and when @bind-SelectedValues="@IEnumerable<TItem>" , the For property should accept Func<IEnumerable<TItem>> in order to use Data Annotation Validation (because the SelectedValues is bound to IEnumerable<TItem>)

Reproduction link

https://try.mudblazor.com/snippet/muQQkgwxyxVUfSSK

Reproduction steps

1.Create new Blazor Webassmbly 2.Add a MudSelect with MultiSelection="true" and bind its SelectedValues to an object of IEnumerable<T> type

<EditForm Model="@person">
    <DataAnnotationsValidator />
<MudSelect T="string" Label="Names "  MultiSelection="true"  Variant="Variant.Outlined"    AdornmentIcon="@Icons.Filled.Search"
                   @bind-SelectedValues="@person.Favorites" Clearable="true" Immediate="true">
            @foreach (string aFavorite in AllFavorites)
            {
                <MudSelectItem T="string" Value="@aFavorite"></MudSelectItem>
            }
        </MudSelect>
       <MudButton ButtonType="ButtonType.Submit" Variant="Variant.Filled" Color="Color.Primary" Class="ml-auto">Register</MudButton>
       <MudText Color="@Color.Error">
                    <ValidationSummary />
        </MudText>
</EditForm>


@code{
        private IEnumerable<string> AllFavorites=new List<string>
        {"Education","Histoy","Movie","Sport"};
        public class Person
        {
            [MinLength(1)]
            [Required]
            public IEnumerable<string> Favorites{get;set;}=new List<string>();
        }

        private Person person;
        protected override Task OnInitializedAsync()
       {
             person=new();
              return base.OnInitializedAsync();
       }

       private void OnValidSubmit(EditContext ec)
       {

       }
}

Relevant log output

No response

Version (bug)

6.0.11-dev.4

Version (working)

No response

What browsers are you seeing the problem on?

Firefox, Chrome, Microsoft Edge

On what operating system are you experiencing the issue?

Windows

Pull Request

• I would like to do a Pull Request

Code of Conduct

• I agree to follow this project's Code of Conduct