e.item.findconFindControl找不到listview里的fileupload控件啊

[excallibur]

itemdatabond事件里找了两个控件，label控件正常找到,但是fileupload控件却找不到，是不是我搞错了什么？

lb1 = e.Item.FindControl("pathslabel") as Label;
fulimg = e.Item.FindControl("imgup") as FileUpload;
if (fulimg == null)
{
this.Page.RegisterStartupScript("ss", "<script>alert('没找到')</script>");
return;
}
else
{
this.Page.RegisterStartupScript("ss", "<script>alert('找到了')</script>");
return;
}

[宝_爸]

贴aspx中的相关代码。

[excallibur]

<InsertItemTemplate> <tr style=""> <td> <asp:Button ID="InsertButton" runat="server" CommandName="Insert" Text="插入" /> <asp:Button ID="CancelButton" runat="server" CommandName="Cancel" Text="清除" /> </td> <td>  </td> <td> <asp:TextBox ID="titlesTextBox" runat="server" Text='<%# Bind("titles") %>' /> </td> <td> <asp:TextBox ID="contentsTextBox" runat="server" Text='<%# Bind("contents") %>' /> </td> <td> <asp:TextBox ID="wxmarksTextBox" runat="server" Text='<%# Bind("wxmarks") %>' /> </td> <td> <asp:label id="pathslabel" runat="server" Text='<%# Bind("paths") %>'></asp:label> <asp:fileupload id="imgup" runat="server"></asp:fileupload><asp:button id="uploadimg" text="上传图片" runat="server" onclick="UploadButton_Click" /> <asp:Label ID="Lb_Info" runat="server" ForeColor="Red"></asp:Label> </td> </tr> </InsertItemTemplate>