I'm getting a null value when trying to pass a byte array through an action link to the controller. I'm new to MVC. Basically, i need to download the image (byte array) as a pdf. 

View: 

```
if(Model.checkimage != null){ 
    @html.ActionLink("Download PDF", "DownloadPDF", "Transaction", new {Check =  Model.checkimage});
}

```

Controller: 

```
public ActionResult downloadPDF (byte[] Check) 

```