如何在 Yii2 html::dropddownlist 上保持选定的值? [英] how to keep selected value on Yii2 html::dropddownlist?

问题描述

我认为有以下代码:

<?=Html::dropdownList('region',null,
ArrayHelper::map(Ethioregion::find()->all(),'region','region'),[
        'prompt' => 'Select Region..','style'=>'width:200px',]) ?>

并提交按钮

 <?= Html::submitButton('Search', ['name' => 'dele','class' => 'btn btn-primary']) ?>

我的代码运行良好，但我遇到了一个大问题.我选择一个区域并单击搜索按钮，结果正确，当我单击下一页时每页显示 10 个结果，它给了我错误的数据，我注意到这是由于下拉列表中的选定值被重置.我尝试使"Selected'=> true和'Selected'=>'selected'，但它不起作用.那么如何在页面加载后选择下拉列表和复选框列表中的选定值?谢谢

my code working well but I have one big problem. I select a region and click the search button, the result comes correctly, and 10 result is shown per page when I click the next page, it gives me false data, I notice this is due to the selected value on the dropdownlist is reset. I tried both making " Selected'=> true, and 'Selected'=>'selected', but it does not work. so how can I make the selected value on dropdownlist and checkboxlist will be selected after the page is loading? thanks

推荐答案

很简单，你只需要传递整数$region_id:

It is very simple, you must pass integer $region_id only:

<?=Html::dropdownList('region', $region_id,
ArrayHelper::map(Ethioregion::find()->all(),'region','region'),[
        'prompt' => 'Select Region..','style'=>'width:200px',]) ?>

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