[ActiveDataProvider] -- yii2的GridView和ActiveDataProvider具体使用

1.控制器中(以User模块的列表为例)：

第一步：

use backendmodelsUser;
use yiidataActiveDataProvider;

第二步：

public function actionIndex()
{
   $model=new User();
    $dataProvider = new ActiveDataProvider([
        "query" => User::find()->orderBy("id"),//此处添加where条件时："query"=>User::find()->where(["username"=>"lizi"]);
    ]);
    return $this->render("index", [
        "model" => $model,
        "dataProvider" => $dataProvider,
    ]);
}

2.view文件中
第一步：

use yiihelpersHtml;
use yiigridGridView;
use backendmodelsUser;

第二步：

<?=
GridView::widget([
    "dataProvider" => $dataProvider,
    "columns" => [
        "id",
        [
            "attribute" => "username",
            "content" => function($dataProvider){
                return $dataProvider["username"];
            },
        ],
        "email:email",
        [
            "attribute" => "created_at",
            "format" =>  ["date", "php:Y-m-d H:i:s"],
        ],
        [
            "class" => "yiigridActionColumn",
            "header" => "操作",
            "template" => "{view}{update}{password}{delete}",
            "headerOptions" => ["width" => "128", "class" => "padding-left-5px",],
            "contentOptions" => ["class" => "padding-left-5px"],
            "buttons" => [
                "password" => function ($url, $model, $key) {
                    return Html::a("<span class="glyphicon glyphicon-edit"></span>", $url, [
                        "title" => "修改密码",
                        "data-method" => "post",
                        "data-pjax" => "0",
                    ]);
                },
            ],
        ],
    ],
]); ?>

3.运行效果如下图：