How to get a label value from web user control to a content page using master page

Question

I have a web user control book.ascx and a formview:

Answer 1

From the code behind in the Default.aspx.cs:

protected void fv_OnDataBound(object sender, EventArgs e) 
{
    Label fvLabel = (Label)fv.FindControl("bookID");
    lblBookId.Text = fvLabel.Text;
}