C# & Adding Dynamic META Tags
I have this code
protected void Page_Load(object sender, EventArgs e)
{
DataSet.DestinationsDataTable GetDestinations = (DataSet.DestinationsDataTable)dta.GetData();
Page.Title = GetDestinations.Rows[0]["Meta_Title"].ToString();
HtmlMeta hm = new HtmlMeta();
HtmlHead head = (HtmlHead)Page.Header开发者_运维问答;
hm.Name = GetDestinations.Rows[0]["Meta_Desc"].ToString();
hm.Content = GetDestinations.Rows[0]["Meta_Key"].ToString();
head.Controls.Add(hm);
}
And it's returning this error (on a content page)
The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>).
Thoughts?
I don't see what's not clear from the error message.
Your <head> tag contains a <% %> block, and therefore you cannot dynamically add controls there at runtime.
To resolve this, add a placeholder and put your meta tags there:
<html>
<head>
...
<asp:PlaceHolder runat="server" ID="metaTags" />
</head>
...
And then:
protected void Page_Load(object sender, EventArgs e)
{
DataSet.DestinationsDataTable GetDestinations = (DataSet.DestinationsDataTable)dta.GetData();
Page.Title = GetDestinations.Rows[0]["Meta_Title"].ToString();
HtmlMeta hm = new HtmlMeta();
hm.Name = GetDestinations.Rows[0]["Meta_Desc"].ToString();
hm.Content = GetDestinations.Rows[0]["Meta_Key"].ToString();
this.metaTags.Controls.Add(hm);
}
加载中,请稍侯......
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