<cimesui:cimesGridView ID="GridView1" runat="server" AutoGenerateColumns="False"  CssClass="left"

                  DataKeyNames="ID" OnRowDataBound="GridView1_RowDataBound" OnRowDeleted="GridView1_RowDeleted"

                 OnRowDeleting="GridView1_RowDeleting" OnSelectedIndexChanged="GridView1_SelectedIndexChanged">

                <Columns>

                    <asp:CommandField HeaderText="操作"  ShowDeleteButton="True" >

                        <ItemStyle HorizontalAlign="Center" />

                    </asp:CommandField>

                    <asp:TemplateField HeaderText="" HeaderStyle-Width="200px">

                                    <ItemTemplate>

                                        <a href="javascript:;" onclick="return GetSelectedRow(this)">下载</a>

                                    </ItemTemplate>

                                </asp:TemplateField>

                    <asp:BoundField DataField="ID" HeaderText="ID" />

                    <asp:BoundField DataField="filename" HeaderText="文件名" />

                    <asp:BoundField DataField="filesize" DataFormatString=" {0} Byte" HeaderText="文件尺寸">

                        <ItemStyle HorizontalAlign="Right" />

                    </asp:BoundField>

                </Columns>

                <EmptyDataTemplate>

                    没有附档存在！

                </EmptyDataTemplate>

            </cimesui:cimesGridView>  

   //前端页面的GetSelectedRow方法

<script type="text/javascript">

//获取选中行的ID，并打开一般处理程序页面

        function GetSelectedRow(UserLink) {

            var row = UserLink.parentNode.parentNode;

            var id = row.cells[2].innerHTML;

            window.location.href = "../Function/IQCGetUploadFile.ashx?id=" + id+"";

        }

    </script>

//一般处理程序（后缀名.ashx） IQCGetUploadFile.ashx  页面代码

 public class IQCGetUploadFile : IHttpHandler

    {

        public void ProcessRequest(HttpContext context)

        {

            try

            {

                //string ID = context.Request["id"].ToString();

                string ID = context.Request.QueryString["id"];

                string filePath = InspectDAC.GetFilePath(ID);

                string fileName = filePath.Substring(filePath.LastIndexOf('\\')).Substring(1);

                byte[] output = InspectDAC.OutputAttachmentFile(ID);

                //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);

                HttpContext.Current.Response.Clear();

                fs.Close();

                HttpContext.Current.Response.ContentType = "application/octet-stream";

                //通知浏览器下载文件而不是打开

                HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8));

                HttpContext.Current.Response.BinaryWrite(bytes);

                HttpContext.Current.Response.WriteFile(filePath);

                HttpContext.Current.Response.Flush();

                //context.Response.End();

                HttpContext.Current.ApplicationInstance.CompleteRequest();

            }

            catch (Exception ex)

            {

                context.Response.Write(ex.Message);

            }

        }

        public bool IsReusable

        {

            get

            {

                return false;

            }

        }

    }