把二进制流在页面输出为什么文件名老是显示页面名称？

把二进制流在页面输出为什么文件名老是显示页面名称？
代码如是下：

 #region 显示信息
    /// <summary>
    /// 显示信息
    /// </summary>
    public void showData()
    {
        string ID = Request.QueryString["ID"];
        string sql = "select FContent,FName,FullName  from Annex where id='" + ID + "'";
        DataSet ds = 取得数据;
        //try
        {
            byte[] filec = (byte[])(ds.Tables[0].Rows[0]["FContent"]);
            Response.Clear();
            string FileName = ds.Tables[0].Rows[0]["FName"].ToString();
            string FullName = ds.Tables[0].Rows[0]["FullName"].ToString();
            //string FullName = FileName;
            string imageType = System.IO.Path.GetExtension(FullName).ToLower();
            if (FileName.Length > 16)
            {
                FullName = FileName.Substring(0, 16) + "" + imageType;
            }
            FullName = ToHexString(FullName);
            if (imageType == ".jpg")
            {
                ResponseEnd(filec, FullName);
            }
            if (imageType == ".doc")
            {
                ContentType = "application/msword"; 
 
                Response.ContentType = ContentType;
                Response.ContentEncoding = System.Text.Encoding.Unicode;
                FullName = "dd.doc";
                Response.AddHeader("Content-Disposition ", "attachment;filename=" + FullName);
                Response.Charset = "GB2312";
                Response.OutputStream.Write(filec, 0, filec.Length);
                Response.End();
            }
        }
        //catch
        {

        }
    }
    #endregion

二进制流，word 显示页面名称
[解决办法]
好神奇。。。
浏览器可以直接解析二进制流么？
浏览器可以直接打开操作Office文件么。。
[解决办法]
Refer this:
http://www.cnblogs.com/insus/articles/2012733.html