How can I use a simple Dropdown list in the search box of GridView::widget, Yii2?
You can also use below code
[
'attribute'=>'attribute name',
'filter'=>array("ID1"=>"Name1","ID2"=>"Name2"),
],
OR
[
'attribute'=>'attribute name',
'filter'=>ArrayHelper::map(Model::find()->asArray()->all(), 'ID', 'Name'),
],
Add this in Gridview columns array:
[
'attribute' => 'attribute_name',
'value' => 'attribute_value',
'filter' => Html::activeDropDownList($searchModel, 'attribute_name', ArrayHelper::map(ModelName::find()->asArray()->all(), 'ID', 'Name'),['class'=>'form-control','prompt' => 'Select Category']),
],
Change values according to your attributes.