StaffPerformance/wispro.sp.web/Components/UserGradeSelect.razor

@inject StaffGradeService _staffGradeService;

<Select DataSource="@_StaffGrades"
        DefaultValue="@StaffGradeId"
        LabelName="@nameof(wispro.sp.entity.StaffGrade.Grade)"
        ValueName="@nameof(wispro.sp.entity.StaffGrade.Id)"
        Style="width: 200px"
        Placeholder="选择一个代理人等级"
        IgnoreItemChanges="false"
        AllowClear
        OnSelectedItemChanged="OnSelectedItemChangedHandler">
</Select>

@code {
    private List<StaffGrade> _StaffGrades;
    private StaffGrade _SelectedItem;

    [Parameter]
    public int? StaffGradeId{ get; set;}


    [Parameter]
    public EventCallback<int?> StaffGradeIdChanged { get; set; }

    protected override async System.Threading.Tasks.Task OnInitializedAsync()
    {
        base.OnInitialized();

        _StaffGrades =await _staffGradeService.GetAll();
    }

    private void OnSelectedItemChangedHandler(StaffGrade value)
    {
        _SelectedItem = value;
        StaffGradeIdChanged.InvokeAsync(_SelectedItem.Id);
    }

}