I want to create a components by following this steps:

• 我有一张商品 list .
• I want to loop in this list and create a component like InputNumber.
  
• 将EventCallback添加到接受这Inputtext中的ref的泛型创建的InputNumber中，因为我想使用这ref来将焦点设置在这InputNumber上.
• I have also onblure method that execute some code for me, and I am using the onfocus to return focus to the input after execute this code by onblure
  

My question
How can I get this ref and send it as parameter of EventCallback?
The problem here that this components have been generated by loop, so I don't want to create by hand hundred variables to represent ref's.
My concept code like this:

@code{
  private void OnFocus(MyInputNumber<double?> obj)
  {
     if (obj is not null)
     {
       obj!.Element.Value.FocusAsync();
     }
  }
}
@foreach(var MyItem in MyList)
{
  <EditForm Model="MyItem">
    //Some components ..
    <label>
        Test
        <InputNumber @bind-Value="MyItem.MyVal"
         @onfocus="@((InputNumber<double?> obj @*wrong*@) =>  
    OnFocus(obj))"
    @onblur=@(() => OnblureHandler(context))
    </label>
 </EditForm>
}

If you see up the parameter InputNumber<double?> obj, this way is wrong, usually I use @ref=SomeVariable but becasue I created in generic way, I can not do that.

Note:

我不需要将我的列表调整为dictionary<MYItemType,InputNumber<double?>>，或者创建一个将InputNumber<double?>作为属性的新类.我正在寻找不同的方式，比如从editcontext 到任何输入都被修改并重新设置焦点，我不知道这是否可能！