MeiRiYiCheng_1_old/YBDevice.Web/Pages/Old/Components/HelloWorld.razor

<h3>父组件传递过来的参数:@Text</h3>

@code {
    //显示的文本
    [Parameter]
    public string? Text{  get;  set; }

     protected override void OnParametersSet()
    {
        Text = Text ?? "test";
    }
}