该问题是由Blazor WASM中使用Virtualize组件时引起的。在Virtualize组件中，request.count总是等于项目数量。

解决方法是，在Virtualize组件内部，使用Math.Min方法将请求的数量限制为实际项目数量。以下是代码示例：

  
    
@myItem
  
  
    
Loading more items...
  

private List myList = new List();

protected override async Task OnInitializedAsync()
{
  myList = await LoadItems();
}

private async Task> LoadItems()
{
  // load list of items from external source
}

private void OnVirtualizeScroll(WindowEventArgs args)
{
  var virtualizeHeight = int.Parse(args.TargetElement.GetValue("offsetHeight").ToString());
  var itemHeight = 30; // height of individual items
  var minCount = Math.Min(myList.Count, (int)(virtualizeHeight / itemHeight));
  // rest of code for handling scroll event
}