为什么ValidationMessage组件在使用EditContext时不在Blazor wasm中显示错误消息

我使用Blazor wasm创建一个表单，并使用EditContext属性（而不是Model属性）

在razor页面中，我使用ValidationMessage组件，如下所示：

private EditContext FormEditContext;
protected override Task OnInitializedAsync()
{
   FormEditContext = new EditContext(MyModel);
   return base.OnInitializedAsync();
}

<ValidationMessage For=@(() => MyModel.FirstName)></ValidationMessage>

有关信息，ValidationSummary组件将显示错误消息

private EditContext FormEditContext;
protected override Task OnInitializedAsync()
{
   FormEditContext = new EditContext(MyModel);
   return base.OnInitializedAsync();
}

<ValidationMessage For=@(() => MyModel.FirstName)></ValidationMessage>

yield return new ValidationResult("FirstName required", new[] { "FirstName" });