how to pass a url Parameter Using Html Form

See more:

MVC

controller

<form id="Form1" action="<%= Url.Content("~/u/img?id=Model.uid")%>" method="post"  enctype="multipart/form-data"> 

I've a form like this, but it can's pass the
Model.uid value to "img" controller,just show"id=Model.uid", how to sprell this?
THank you for helping me.