小编cod*_*tex的帖子

我已经wheels.component嵌套了car.component.

wheels.component:

export class WheelsComponent {    
    @Output() onLoaded : EventEmitter<string>() = new EventEmitter<string>();

    private downloadAllFiles(url: string) {
        this.onLoaded.emit('Hello, World 1!');
        //some operations to wait
        this.onLoaded.emit('Hello, World 2!');

    };
}

组件car.component不是在html页面写的,而是通过car-routing.module.ts中的路由调用:

@NgModule({
    imports: [
        RouterModule.forChild([
            {
                path: 'sfactmessage/:id',
                component: CarComponent,
                resolve: {
                    card: cardResolver
                }
            }
        ])
    ],
    exports: [RouterModule]
})
export class CarRoutingModule {}

我想要的是处理来自发出的事件wheels.component,不是car.component,而是在app.component.

是否有可能处理事件app.component？

plunker示例不起作用(对不起,这是我的第一个plunkr示例),但是给出了我的应用程序如何排列的视图.

请帮助我，我正在尝试创建文件上传dropzone.js，但我很难找到删除上传文件的方法。这是我的代码：

索引.php

<div class="container">
<div class="file_upload">
    <form action="file_upload.php" class="dropzone">
        <div class="dz-message needsclick">
            <strong>Drop files here or click to upload.</strong><br />
        </div>
    </form>     
</div>      

文件上传.php

include_once("db_connect.php");
if(!empty($_FILES)){     
    $upload_dir = "uploads/";
    $fileName = $_FILES['file']['name'];
    $uploaded_file = $upload_dir.$fileName;    
    if(move_uploaded_file($_FILES['file']['tmp_name'],$uploaded_file)){
        //insert file information into db table
        $mysql_insert = "INSERT INTO uploads (file_name, upload_time)VALUES('".$fileName."','".date("Y-m-d H:i:s")."')";
        mysqli_query($conn, $mysql_insert) or die("database error:". mysqli_error($conn));
    }   
}

如何放置删除按钮并删除上传的文件？