ComponentArt 嵌入 asp.net 自带控件报错

Question

第一 在ComponentArt 是否能嵌入asp.net 自带控件报错如：<asp:button id="BTsearch" runat="server" Text="检索"></asp:button>第二 asp:button 事件是如何控制的？this.BTsearch.Click += new System.EventHandler(this.BTsearch_Click);－－－－（报错）private void BTsearch_Click(object sender, System.EventArgs e)
{
Response.Write("<Script language=\"JavaScript\">\r\n");
Response.Write("alert (\"wwww!\");");
Response.Write("</Script>");

}－－－过不了
未将对象引用设置到对象的实例。 
说明: 执行当前 Web 请求期间，出现未处理的异常。请检查堆栈跟踪信息，以了解有关该错误以及代码中导致错误的出处的详细信息。 异常详细信息: System.NullReferenceException: 未将对象引用设置到对象的实例。源错误: 
行 63：  {    
行 64：  this.Bt_login.Click += new System.EventHandler(this.Bt_login_Click);
行 65：  this.BTsearch.Click += new System.EventHandler(this.BTsearch_Click);
行 66： 
行 67：  }
 源文件: c:\inetpub\wwwroot\jxlibrary\index.aspx.cs    行: 65 堆栈跟踪: 
[NullReferenceException: 未将对象引用设置到对象的实例。]
   JXLibrary.WebForm1.InitializeComponent() in c:\inetpub\wwwroot\jxlibrary\index.aspx.cs:65
   JXLibrary.WebForm1.OnInit(EventArgs e) in c:\inetpub\wwwroot\jxlibrary\index.aspx.cs:54
   System.Web.UI.Control.InitRecursive(Control namingContainer)
   System.Web.UI.Page.ProcessRequestMain() 
<COMPONENTART:NAVBAR id="NavBar1" runat="server" CssClass="NavBar" ScrollDownImageHeight="16" ScrollDownImageWidth="16"
 ScrollUpImageHeight="16" ScrollUpImageWidth="16" ScrollDownActiveImageUrl="scrolldown_active.gif" ScrollDownHoverImageUrl="scrolldown_hover.gif"
ScrollDownImageUrl="scrolldown.gif" ScrollUpActiveImageUrl="scrollup_active.gif" ScrollUpHoverImageUrl="scrollup_hover.gif"
ScrollUpImageUrl="scrollup.gif" CollapseDuration="200" CollapseTransition="Fade" ExpandDuration="200" ExpandTransition="Fade"
ShowScrollBar="false" FullExpand="false" ExpandSinglePath="true" SiteMapXmlFile="./XML/navData.xml" DefaultItemLookID="TopItemLook"
height="100%" ImagesBaseUrl="images/" width="100%">
  <ItemLooks>
<ComponentArt:ItemLook LookID="TopItemLook" CssClass="TopItem" HoverCssClass="TopItemHover" LeftIconUrl="top_folder.gif"
LabelPaddingLeft="15" LeftIconWidth="30" LeftIconHeight="24" />
<ComponentArt:ItemLook LookID="Level2ItemLook" LabelPaddingLeft="10" CssClass="Level2Item" HoverCssClass="Level2ItemHover"
LeftIconWidth="16" LeftIconHeight="16" />
<ComponentArt:ItemLook LookID="EmptyLook" CssClass="Empty" />
</ItemLooks>
<Templates>
<ComponentArt:NavigationCustomTemplate id="quanwenTemplate" runat="server">
<Template runat="server">
<table height="20%" width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td align="left">
关键字：<asp:textbox id="Textbox3" runat="server" Width="80"></asp:textbox>
</td>
</tr>
   <tr>
  <td align="left">
分 类：<asp:DropDownList id="DropDownList1" runat="server" Height="8px" Width="80">
<asp:ListItem Value="book_name">名称</asp:ListItem>
<asp:ListItem Value="re">简介</asp:ListItem>
</asp:DropDownList>
</td>
</tr>
<tr>
<td align="center">
  
<asp:button id="BTsearch" runat="server" Text="检索"></asp:button>
</td
</tr>
</td>