Quantity is not updating in magento site

Question

we have marketplace multi vendor/seller site. we gave an option for seller to update the product information through frontend.....

As it is marketplace site, we have man

Answer 1

I found solution for 1st problem.

public function massupdatesellerproAction(){
    if($this->getRequest()->isPost()){
    if(!$this->_validateFormKey()){
     $this->_redirect('marketplace/marketplaceaccount/myproductslist/');
    }
     $ids= $this->getRequest()->getParam('product_mass_update');
     $price= $this->getRequest()->getParam('price');
     $special= $this->getRequest()->getParam('specialprice');

     $i=1;
     foreach ($ids as $key => $value) {
        $i=$i+1;
          $qty = $this->getRequest()->getParam('stock'.$i);
     $product = Mage::getModel('catalog/product')->load($value);
     $product->setPrice($price[$key]);
     $product->setSpecialPrice($special[$key]);
     //$product->setQty($qty);

    $product->save();

    $stockItem = Mage::getModel('cataloginventory/stock_item')->loadByProduct($value);
    $stockItem->setData('manage_stock', 1);
    $stockItem->setData('qty', $qty);

    $stockItem->save();
     }
    Mage::getSingleton('core/session')->addSuccess( Mage::helper('marketplace')->__('Products has been sucessfully deleted from your account'));
    $this->_redirect('marketplace/marketplaceaccount/myproductslist/');
    }}