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直接使用超链接的方式进行文件下载，会出现如同txt,以及一些图片格式的文件不能直接下载，而是在浏览器中直接打开，那么如果想将所有格式的文件进行下载的话，如下所示：

前台代码：

  <asp:Repeater ID="rptFile" runat="server" OnItemCommand="rptFile_ItemCommand">

                                <HeaderTemplate>                                     <table cellpadding="0" cellspacing="0">                                 </HeaderTemplate>                                 <ItemTemplate>                                     <tr>                                         <td height="25">                                             <%#Eval("AttaNames")%>                                             <asp:LinkButton ID="LinkButton1" runat="server" CommandName="download" CommandArgument='<%# Eval("AttaNames") %>'                                                 class="delete">下载</asp:LinkButton>                                             <%-- <a href='../UploadFile/<%#Eval("AttaNames")%>'>下载</a>--%>                                         </td>                                     </tr>                                 </ItemTemplate>                                 <FooterTemplate>                                     </table>                                 </FooterTemplate>                             </asp:Repeater>

此代码中不能出现 <%-- <asp:UpdatePanel ID="UpdatePanel1" runat="server">

                                <ContentTemplate>--%>

另外必须有        <asp:ScriptManager ID="ScriptManager1" runat="server">

                           </asp:ScriptManager>

后台代码：

        protected void rptFile_ItemCommand(object source, RepeaterCommandEventArgs e)

        {

            string AttaName = e.CommandArgument.ToString();

            if (e.CommandName == "download")             {                 string fileName = AttaName;//客户端保存的文件名                 string filePath = Server.MapPath("../UploadFile/Project/" + AttaName);//路径

                //以字符流的形式下载文件

                FileStream fs = new FileStream(filePath, FileMode.Open);                 byte[] bytes = new byte[(int)fs.Length];                 fs.Read(bytes, 0, bytes.Length);                 fs.Close();                 Response.ContentType = "application/octet-stream";                 //通知浏览器下载文件而不是打开                 Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8));                 Response.BinaryWrite(bytes);                 Response.Flush();                 Response.End();

            }

        }

 

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