diff --git a/README.md b/README.md
index 3cb056c..a0bb1e8 100644
--- a/README.md
+++ b/README.md
@@ -46,6 +46,7 @@ Installation
 				'mimeTypes' => 'image/png', // Only png images
 				'maxSize' => 1024 * 1024 // 1 MB
 			],
+			//'extForOpen' => 'pdf, png',//Extensions for open file instead of download
 			'tableName' => '{{%attachments}}' // Optional, default to 'attach_file'
 		]
 		...
@@ -132,6 +133,21 @@ Usage
     }
     ```
 
+Using Events
+------------
+You may add the following function to your model
+    
+```php
+public function init(){
+    $this->on(\nemmo\attachments\behaviors\FileBehavior::EVENT_AFTER_ATTACH_FILES, function ($event) {
+        /** @var $files \nemmo\attachments\models\File[] */
+        $files = $event->files;
+        //your custom code
+    });
+    parent::init();
+}
+```
+    
 Change log
 ----------
 
diff --git a/src/Module.php b/src/Module.php
index 9c16117..d13bc5a 100644
--- a/src/Module.php
+++ b/src/Module.php
@@ -16,6 +16,12 @@ class Module extends \yii\base\Module
 
     public $tempPath = '@app/uploads/temp';
 
+    /**
+     * Extensions for open file instead of download.
+     * Example: 'pdf, jpg'
+     */
+    public $extForOpen = '';
+
     public $rules = [];
 
     public $tableName = 'attach_file';
@@ -142,6 +148,8 @@ public function attachFile($filePath, $owner)
         $file->size = filesize($filePath);
         $file->type = $fileType;
         $file->mime = FileHelper::getMimeType($filePath);
+        $file->create_by = \Yii::$app->user->id;
+        $file->create_date = new \yii\db\Expression('NOW()');
 
         if ($file->save()) {
             unlink($filePath);
diff --git a/src/behaviors/FileBehavior.php b/src/behaviors/FileBehavior.php
index ece63fb..4be4b3b 100644
--- a/src/behaviors/FileBehavior.php
+++ b/src/behaviors/FileBehavior.php
@@ -8,6 +8,7 @@
 
 namespace nemmo\attachments\behaviors;
 
+use nemmo\attachments\events\FileEvent;
 use nemmo\attachments\models\File;
 use nemmo\attachments\ModuleTrait;
 use yii\base\Behavior;
@@ -21,6 +22,8 @@ class FileBehavior extends Behavior
 {
     use ModuleTrait;
 
+    const EVENT_AFTER_ATTACH_FILES = 'afterAttachFiles';
+
     public function events()
     {
         return [
@@ -43,11 +46,18 @@ public function saveUploads($event)
         }
 
         $userTempDir = $this->getModule()->getUserDirPath();
+        $attachedFiles = [];
         foreach (FileHelper::findFiles($userTempDir) as $file) {
-            if (!$this->getModule()->attachFile($file, $this->owner)) {
+            if (!($attachedFile = $this->getModule()->attachFile($file, $this->owner))) {
                 throw new \Exception(\Yii::t('yii', 'File upload failed.'));
+            }else{
+                $attachedFiles[] = $attachedFile;
             }
         }
+        if(count($attachedFiles)){
+            $event = \Yii::createObject(['class' => FileEvent::class, 'files' => $attachedFiles]);
+            $this->owner->trigger(self::EVENT_AFTER_ATTACH_FILES, $event);
+        }
         rmdir($userTempDir);
     }
 
diff --git a/src/controllers/FileController.php b/src/controllers/FileController.php
index 9d1ec50..44af3a9 100644
--- a/src/controllers/FileController.php
+++ b/src/controllers/FileController.php
@@ -52,7 +52,11 @@ public function actionDownload($id)
         $file = File::findOne(['id' => $id]);
         $filePath = $this->getModule()->getFilesDirPath($file->hash) . DIRECTORY_SEPARATOR . $file->hash . '.' . $file->type;
 
-        return Yii::$app->response->sendFile($filePath, "$file->name.$file->type");
+        $inline = false;
+        $extForOpen = array_map('trim', explode(',', $this->getModule()->extForOpen));
+        if(@in_array($file->type, $extForOpen)) $inline = true;
+
+        return Yii::$app->response->sendFile($filePath, "$file->name.$file->type", ['inline' => $inline]);
     }
 
     public function actionDelete($id)
diff --git a/src/events/FileEvent.php b/src/events/FileEvent.php
new file mode 100644
index 0000000..4192f72
--- /dev/null
+++ b/src/events/FileEvent.php
@@ -0,0 +1,29 @@
+<?php
+
+namespace nemmo\attachments\events;
+
+use yii\base\Event;
+
+class FileEvent extends Event
+{
+    /**
+     * @var nemmo\attachments\models\File[]
+     */
+    private $_files;
+
+    /**
+     * @return nemmo\attachments\models\File[]
+     */
+    public function getFiles()
+    {
+        return $this->_files;
+    }
+
+    /**
+     * @param nemmo\attachments\models\File[] $files
+     */
+    public function setFiles($files)
+    {
+        $this->_files = $files;
+    }
+}
diff --git a/src/migrations/m180327_050508_add_fields_create_date_etc.php b/src/migrations/m180327_050508_add_fields_create_date_etc.php
new file mode 100644
index 0000000..db71582
--- /dev/null
+++ b/src/migrations/m180327_050508_add_fields_create_date_etc.php
@@ -0,0 +1,32 @@
+<?php
+namespace nemmo\attachments\migrations;
+
+use yii\db\Migration;
+
+/**
+ * Class m180327_050508_add_fields_create_date_etc
+ */
+class m180327_050508_add_fields_create_date_etc extends Migration
+{
+    use \nemmo\attachments\ModuleTrait;
+
+    /**
+     * @inheritdoc
+     */
+    public function safeUp()
+    {
+        $this->addColumn($this->getModule()->tableName, 'create_by', $this->integer());
+        $this->addColumn($this->getModule()->tableName, 'create_date', $this->timestamp()->defaultValue(null));
+
+        $this->createIndex('file_create_by', $this->getModule()->tableName, 'create_by');
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function safeDown()
+    {
+        $this->dropColumn($this->getModule()->tableName, 'create_by');
+        $this->dropColumn($this->getModule()->tableName, 'create_date');
+    }
+}
diff --git a/src/models/File.php b/src/models/File.php
index f3d2870..e5c587c 100644
--- a/src/models/File.php
+++ b/src/models/File.php
@@ -18,6 +18,8 @@
  * @property integer $size
  * @property string $type
  * @property string $mime
+ * @property integer $create_by
+ * @property string $create_date
  */
 class File extends ActiveRecord
 {
@@ -66,7 +68,9 @@ public function attributeLabels()
             'hash' => 'Hash',
             'size' => 'Size',
             'type' => 'Type',
-            'mime' => 'Mime'
+            'mime' => 'Mime',
+            'create_by' => 'Create by',
+            'create_date' => 'Create date',
         ];
     }