找不到MouseEventArgs [英] Cant find MouseEventArgs

问题描述

我一直在跟创建并使用ASP.NET Core Razor组件

我对此部分有疑问

<div class="panel panel-default">
    <div class="panel-heading">@Title</div>
    <div class="panel-body">@ChildContent</div>

    <button class="btn btn-primary" @onclick="OnClick">
        Trigger a Parent component method
    </button>
</div>

@code {
    [Parameter]
    public string Title { get; set; }

    [Parameter]
    public RenderFragment ChildContent { get; set; }

    [Parameter]
    public EventCallback<MouseEventArgs> OnClick { get; set; }
}

我不断收到以下错误消息

I keep getting the following error

严重性代码描述项目文件行抑制状态 错误CS0246找不到类型或名称空间名称'MouseEventArgs'(是否缺少using指令或程序集引用?)BlazorList D:\ Development \ BlazorApp1 \ BlazorList \ Pages \ ShowListComponent.razor 19有效

Severity Code Description Project File Line Suppression State Error CS0246 The type or namespace name 'MouseEventArgs' could not be found (are you missing a using directive or an assembly reference?) BlazorList D:\Development\BlazorApp1\BlazorList\Pages\ShowListComponent.razor 19 Active

推荐答案

事件名称在Preview 9中已更改

The event names have been changed in Preview 9

来自博客(

将Microsoft.AspNetCore.Components.UIEventArgs替换为 System.EventArgs并从所有派生的EventArgs中删除"UI"前缀 类型(UIChangeEventArgs-> ChangeEventArgs等).

Replace Microsoft.AspNetCore.Components.UIEventArgs with System.EventArgs and remove the "UI" prefix from all EventArgs derived types (UIChangeEventArgs -> ChangeEventArgs, etc.).

因此，预览版8及以下版本需要在事件名称和Microsoft.AspNetCore.Components.UIEventArgs命名空间上使用UI前缀.

So preview 8 and below need the UI prefix on the event name and the Microsoft.AspNetCore.Components.UIEventArgs namespace.

预览9不需要事件名称上的UI前缀.并需要命名空间System.EventArgs

preview 9 does not need the UI prefix on the event name. and requires the namespace System.EventArgs

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