引用下面的dll文件
dll文件下载 

在.aspx文件加载如下代码
<%@ Register Assembly="QuCha" Namespace="QuCha.Net.UI.WebControls" TagPrefix="cc1" %>

  <tr>
     <td align="center" >
     <asp:Button ID="upload"  runat="server" OnClick="Button1_Click" Text="上 传" />
    </tr>
   <tr>
     <td> <cc1:UploadProgressBar   UploadButtonName="upload"   ID="UploadProgressBar1" runat="server">
        </cc1:UploadProgressBar></td>
   </tr>
上传的时候就自动显示进度条如图：