How to get excel to array in maatwebsite

I and @narayan tried hard to make requested excel file into array. Now I am able to get array properly with below code

$rows = Excel::toArray(new SalesOrderImport, $request->file('sampledata')); 

In my SalesOrderExport class I have default function only, which is required as abstract method.

namespace App\Exports;

use App\SalesOrder;
use Maatwebsite\Excel\Concerns\FromCollection;

class SalesOrderExport implements FromCollection
{
    public function collection()
    {   
        return SalesOrder::all();
    }
}

My Controller code

public function importTest(Request $request)
{
    $rows = Excel::toArray(new SalesOrderImport, $request->file('sampledata'));
    return response()->json(["rows"=>$rows]);
}

And in HTML

<input class="" type="file" name="sampledata" id="sampledata">

I already created this export by

php artisan make:import SalesOrder

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