帮忙解释一下，不明白，lable里边嵌套控件

Question

<asp:Label ID="lblinfo" runat="server">
        <asp:FileUpload ID="uploadfile" runat="server" Width="80%" />
        <asp:Button ID="ButUpload" runat="server" OnClick="Button1_Click" Text="上传" OnClientClick="parent.document.all('divProcessing').style.display='';" />
    </asp:Label>

Answer 1

ID是lblinfo的Label被解析出来 就是一个<span></span>标签 里边当然可以放东西啦
如果给它赋上Text值 那么span里就有Text文本 <asp:Label ID="lblinfo" runat="server" Text="aaa">
  <asp:FileUpload ID="uploadfile" runat="server" Width="80%" />
  <asp:Button ID="ButUpload" runat="server" OnClick="Button1_Click" Text="上传" OnClientClick="parent.document.all('divProcessing').style.display='';" />
  </asp:Label>可以看成
<span>
   aaa
  <asp:FileUpload ID="uploadfile" runat="server" Width="80%" />
  <asp:Button ID="ButUpload" runat="server" OnClick="Button1_Click" Text="上传" OnClientClick="parent.document.all('divProcessing').style.display='';" />
  </span>
不推荐这么用