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update meta tag - stuck in cache

Hi, I'm trying to updating the meta tag before I share my page on facebook

I'm having some problems, because the meta tag seems to get stuck in the cache or something, or it seems to behave rather randomly, so either I can't change it or that after I've managed to change it ones, I can't change it again.

I'v included a code of a very small program that does nothing else than change the metatag of a page and share it on facebook. Also a picture of the sharing which shows that the original metatag is used and not the change I put in.

In the master page I define the meta tags: 

 <meta name="title" content="This is the Title" />
     <meta name="description" content="This is a short summary of the page." />

In sharefacebook.aspx I put the label:

<asp:Label ID="labelSteps_1_2" runat="server" Text=""></asp:Label>


and in sharefacebook.aspx.cs I put the facebook properties on the label,  and I change the content of the meta tags

   protected void Page_Load(object sender, EventArgs e)
    {
        labelSteps_1_2.Text = "<a name=\"fb_share\" type=\"button\"></a>" +
      "<script src=\"http://static.ak.fbcdn.net/connect.php/js/FB.Share\" " +  "type=\"text/javascript\"  >  </script>";

        HtmlMeta tag = new HtmlMeta();
        tag.Name = "title";
        tag.Content = "Title test";
        Page.Header.Controls.Add(tag);

        HtmlMeta tag1 = new HtmlMeta();
        tag1.Name = "description";
        tag1.Content = "description test";
        Page.Header.Controls.Add(tag1);

      
           }

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ajb2222

change the meta tag to look like this

<meta name="title" content="This is the Title" id="metaTitle" runat="server" />

then this

HtmlMeta tag = new HtmlMeta();
tag.Name = "title";
tag.Content = "Title test";
Page.Header.Controls.Add(tag);

becomes this

metaTitle.Attributes("content") = "Title test";

Alpesh Patel

Please find Meta Tag in Header using Page.Header object and replace the tag value.

bjorkn

ASKER

Thank you, it's a good idea, but do you know how I can acess the metaTitle property from a content page, since the meta definition is in the master page

and the metaTitle.Attributes("content") = "Title test";

is in a content page

regards, Bjork

bjorkn

ASKER

PatelAlpesh:

I'm not sure what you mean in your answer
Isn't that what I'm doing by this:

Page.Header.Controls.Add(tag);

ajb2222

ok to get the master page control do this

((HtmlMeta)Master.FindControl("metaTitle")).Content = "Title test";

bjorkn

ASKER

no it didn't work

I really thought this would work,

I'm wondering if the master page rewrite the content of the meta tag after I change it in the content file, this is very strange

bjorkn

ASKER

I see now that the metatag seems to update perfectly.
It just when I'm sharing it on facebook where it seems to get lost or maybe facebook is using a cache which isn't updated very often....

ASKER CERTIFIED SOLUTION

John Doeherty

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