To insert very first record into a gridview using the "emptytemplate" ?

I want to send the values of 2 text boxes into a button click event so that I can use the values, I presume it can be done of course ?
Using Visual Stidio Express 2012
string tmpOwnerName = (control.FindControl("txtInsertName2") as TextBox).Text;
Error for above line is:- NullReferenceException was unhandled by user code
I am using the above line within my code below to get hold of text box values 
My Code:-
 
protected void Button2_Click(object sender, EventArgs e)
    {
        OwnersPetsEntities context = new OwnersPetsEntities();
        Control control = null;
        if (GridView1.FooterRow != null)
       {
        control = GridView1.FooterRow;
 & ...