新手asp.net的数据库添加文件的有关问题

新手求助asp.net的数据库添加文件的问题
就是做的微信开发要求在数据库中加入一个电话册然后在微信客户端实现电话查询功能，本人是新手问题没有说清楚的地方，我会及时补充，希望大家不吝指导，谢谢~
------解决思路----------------------
try
            {
                Stream s = System.Web.HttpContext.Current.Request.InputStream;
                byte[] b = new byte[s.Length];
                s.Read(b, 0, (int)s.Length);
                string postStr = Encoding.UTF8.GetString(b);

                if (!string.IsNullOrEmpty(postStr))
                {

                    XmlDocument doc = new XmlDocument();
                    doc.LoadXml(postStr);
                    XmlElement rootElement = doc.DocumentElement;

                    String ToUserName = rootElement.SelectSingleNode("ToUserName").InnerText;

                    String FromUserName = rootElement.SelectSingleNode("FromUserName").InnerText;

                    long CreateTime = long.Parse(rootElement.SelectSingleNode("CreateTime").InnerText);

                    String MsgType = rootElement.SelectSingleNode("MsgType").InnerText;

                    long MsgId;
                    MessagetoXML message;
                    message = new MessagetoXML(FromUserName, ToUserName, CreateTime, MsgType);
                    switch (MsgType)
                    {

                        case "text":
                            MsgId = long.Parse(rootElement.SelectSingleNode("MsgId").InnerText);
                            TextMessage text = new TextMessage(ToUserName, FromUserName, CreateTime, MsgType, MsgId);
                            string e = rootElement.SelectSingleNode("Content").InnerText;
                            text.setContent(e);

                            if (-1 != e.IndexOf("1#"))
                            {
                                string key = e.Substring(2);
                                string return_message = "抱歉，未查询到：" + key;
                                ///// 搜索数据库
                                DataBase db = new DataBase("NBU_wechat", ".");
                                string sqlstr = "select * from NBU_Select where NBU_Name = @key";
                                SqlCommand cmd = new SqlCommand();

                                cmd.CommandText = sqlstr;

                                cmd.Parameters.Add("@key", SqlDbType.NVarChar, 255).Value = key;
                                DataSet ds = db.MyGetDataSetSql(cmd);

                                if (ds.Tables[0].Rows.Count > 0)
                                {
                                    return_message = "";
                                    for (int i = 0; i < ds.Tables[0].Rows.Count; ++i)
                                    {
                                        return_message += "部门：" + ds.Tables[0].Rows[i][0].ToString().Trim() + "\r\n";
                                        return_message += "姓名：" + ds.Tables[0].Rows[i][1].ToString().Trim() + "\r\n";
                                        return_message += "短号：" + ds.Tables[0].Rows[i][2].ToString().Trim() + "\r\n";
                                    }

                                }

                                message.SetResxml(return_message);
                                respXml = message.GetResxml();
                            }
                     }return respXml;
------解决思路----------------------
这跟数据库添加文件有一毛钱关系?

新手asp.net的数据库添加文件的有关问题

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