add meta tag to header dynamically

Question

User-1106823036 posted

I wan to add a meta tag to the head dynamically

this is my code

Dim fbTitle As New HtmlMeta

        fbTitle.Attributes.Add("property", "og:title")
        fbTitle.Content = "test"
        Page.Header.Controls.Add(fbTitle)

it throws this error

The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>).

what is wrong.

Thank you in advance for help

Answer 1

User-1106823036 posted

I found the solution

 Dim headTag As New HtmlHead()
        Dim metaTag As New HtmlMeta()
        metaTag.Attributes.Add("property", "og:title")
        metaTag.Content = "test"

        headTag.Controls.Add(metaTag)

Answer 2

User753101303 posted

Hi,

This message is telling you it can't be done if your ASPX markup already uses a <% %> block for this header control. Is this the case?

Edit: use "view source" but here you create a new header control and add the meta to it but the header control for now is not part of the page. So the code doesn't show any error but more likely doesn't do what you want.