• 郁闷了一天终于搞定这个问题了，出现这个问题时候文件其实内容还是可以打开的，就是出现以上的错误原因。经过最终分析确定了具体原因，是因为在Response下载文档时候，最后需要结束

System.Web.HttpContext.Current.Response.End();否则默认为不完整下载状态。反正我加上去后就不出现以上情况了。具体代码如下：

/// 
        /// 下载文件      /// 
        public void LoadPaperTemplate(string mStrFileName)        {            FileStream fs = null;            BinaryReader br = null;            BinaryWriter brnew = null;            try            {                //给内容赋值                   string path = System.Web.HttpContext.Current.Server.MapPath("~/Template");                string mStrFileRoot = string.Format("{0}\\{1}", path, mStrFileName);                if (File.Exists(mStrFileRoot))                {                    fs = new System.IO.FileStream(mStrFileRoot, System.IO.FileMode.Open);                    br = new BinaryReader((Stream)fs);                    byte[] bytes = br.ReadBytes((Int32)fs.Length);                    brnew = new BinaryWriter(fs);                    brnew.Write(bytes, 0, bytes.Length);                    System.Web.HttpContext.Current.Response.Clear();                    System.Web.HttpContext.Current.Response.Buffer = true;                    System.Web.HttpContext.Current.Response.Charset = "GB2312";                    System.Web.HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment;  filename=" + HttpUtility.UrlEncode(mStrFileRoot.Substring(mStrFileRoot.LastIndexOf('\\') + 1)));                    System.Web.HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding("utf-8");                    System.Web.HttpContext.Current.Response.ContentType = "application/ms-word";                    System.Web.HttpContext.Current.Response.BinaryWrite(bytes);                    System.Web.HttpContext.Current.Response.Flush();                    System.Web.HttpContext.Current.Response.End();                }            }            catch (Exception)            {                //throw;            }            finally            {                br.Close();                brnew.Close();                fs.Close();            }        }