问无法在单击链接按钮时打开新选项卡

EN

 <asp:TemplateField HeaderText="ID">
 <ItemStyle HorizontalAlign="Right" />
     <ItemTemplate>
        <asp:LinkButton ID="lnkbtnID" runat="server"  
         CommandArgument='<%# Eval("ID") %>' Font-Underline="true"      
         OnCommand="lnkbtnID_Click" ForeColor="Black" 
         Text='<%# Eval("ID") %>' />
     </ItemTemplate>
 </asp:TemplateField>

protected void lnkbtnID_Click(Object sender, CommandEventArgs e)
    {
        try
        {
            if (e.CommandArgument != null)
            {
                if (e.CommandArgument != null)
                {
                    GridViewRow gvr = (GridViewRow)(sender as LinkButton).NamingContainer;                        
                    string strID = ((LinkButton)gvr.FindControl("lnkID")).Text;
                    string strItemID = ItemDAL.GetItemID(strID, "Metal");
                    string strURL = "~/ASP/Price.aspx?=" + strItemID;
                    Response.Redirect(strURL);
                }
            }
        }
        catch (Exception Ex)
        {

        }
    }