Controls contain code blocks (I .e.), so you cannot modify the control set (in user-defined controls)

One problem has been depressing for more than two hours, that is, there is a head in a page but it is marked as runat = "server", and

Placeholder loads one of my custom controls. As a result, the control always reports this error: the control contains a code block (that is, <%... %>), so the control set cannot be modified,

I found the online post. In fact, the first post should be able to solve the problem, that is, there cannot be something like <%> In runat, or this error will be reported because

I put it on the parent container page, but I never saw it, and thought it was a JS place where I used <%>. I thought it was wrong to bind the control in the gridview. It hurts so much for me !!!!

 

<Link id = "cssid" href = "/style/<% = session [" cssskin "] %>/CSS/style.css" type = "text/CSS"

Rel = "stylesheet" Media = "all"/>
<Link id = "lkframework" href = "/style/<% = session [" cssskin "] %>/CSS/framework.css" type = "text/CSS"

Rel = "stylesheet" Media = "all"/>

 

Drag these two lines to the body. Do not place them in a code block with head runat = server. Otherwise, this error will be reported.