asp.net控件中如何添加onfocus和onblure等事件

asp.net控件中怎么添加onfocus和onblure等事件?
asp.net控件中怎么添加onfocus和onblure等事件?
------解决思路----------------------
直接加到标签上
<asp:TextBox ID="TextBox1" runat="server" onfocus="console.log(this,'focus')" onblur="console.log(this,'blur')"></asp:TextBox>