WebService,ASMX文件使用XML格式数据传递参数、验证与获取XML格式返回值的一种方式

<?xml version="1.0" encoding="gb2312" ?>

<paras>

  <InspectorGuid>当前用户UserGuid</InspectorGuid>

 <Year>年份，1000至9999字符串。（☆注意必须是四位）</Year>

  <Month>月份，01至12字符串。（☆注意必须是两位）</Month> 

  <MainContent>督学计划内容</MainContent>

</paras> 

Hashtable paras = GetParametersFromXML(XMLParas);

public Hashtable GetParametersFromXML(string XMLParameters)
        {
            XmlDocument xml = new XmlDocument();
            xml.LoadXml(XMLParameters);
            XmlNode DataNode = xml.SelectSingleNode("paras");

            Hashtable Parameters = new Hashtable();
            foreach (XmlNode node in DataNode.ChildNodes)
            {
                Parameters.Add(node.Name, node.InnerText);
            }
            return Parameters;
        }

 //检查参数是否存在，第一个值为必填参数节点名称，每个参数用"，"隔开
                string msg = this.CheckParas("InspectorGuid,Year,Month,MainContent", paras);

/// <summary>
        /// 检查是否缺少参数必填参数
        /// </summary>
        /// <param name="Parastr">参数名称，多个参数用逗号隔开</param>
        /// <param name="Paras">获取到参数Hastable</param>
        /// <returns></returns>
        public string CheckParas(string Parastr, Hashtable Paras)
        {
            string[] listParas = Parastr.Split(',');
            string Error = "";
            for (int i = 0; i < listParas.Length; i++)
            {
                if (listParas[i] != "")
                {
                    if (!Paras.ContainsKey(listParas[i]))
                    {
                        Error += listParas[i] + ",";
                    }
                }
            }

            if (Error != "")
            {
                return "缺少参数：" + Error.TrimEnd(',');
            }
            else
            {
                return "";
            }

        }

 string UserGuid = paras["InspectorGuid"].ToString(); //用户UserGuid
                string Year = paras["Year"].ToString();//传过来的月份
                string Month = paras["Month"].ToString();//传过来的月份
                string MainContent = paras["MainContent"].ToString();//传过来的计划内容

 string UserInfoSql = "select a.userguid,a.displayname,b.ouguid,b.ouname from frame_user a join frame_ou b on a.ouguid = b.ouguid where a.userguid ='" + UserGuid + "'";
                //查询该月督学计划是否存在，存在则不能重复插入
                if (DB_XXTInspectorPlan.InspectorPlan_CheckExist(UserGuid, Year, Month))
                {
                    //如果该月已经存在，则提示月度督学计划重复
                    return GetResult(false, "月度督学计划重复", "", "AddInspectorPlan", XMLParas);
                }
                else
                {
                    DataView dv = Epoint.EduFront.Bizlogic.DB_Common.ExecuteToDataView(UserInfoSql);

                    if (dv.Count > 0)
                    {
                        string RowGuid = DB_XXTInspectorPlan.InspectorPlan_Add(dv[0]["UserGuid"].ToString(), dv[0]["displayname"].ToString(), dv[0]["ouguid"].ToString(), dv[0]["ouname"].ToString(), MainContent, Year, Month);
                        //评价成功，返回评价的rowguid
                        return GetResult(true, "添加成功", "<RowGuid>" + RowGuid + "</RowGuid>", "AddInspectorPlan", XMLParas);
                    }
                    else
                    {
                        return GetResult(false, "", "<RowGuid>添加失败</RowGuid>", "ParEvaSchInsert", XMLParas);
                    }
                }

public string GetResult(bool status, string description, string UserData, string MethodName, string XMLPars)
        {
            StringBuilder sb = new StringBuilder();
            sb.Append("<?xml version="1.0" encoding="gb2312"?>");
            sb.Append("<EpointDataBody>");
            sb.Append("<DATA>");
            sb.Append("<ReturnInfo>");
            sb.Append("<Status>" + status.ToString() + "</Status>");
            sb.Append("<Description><![CDATA[" + description + "]]></Description>");
            sb.Append("</ReturnInfo>");
            if (status && UserData != "")
            {
                sb.Append("<UserArea>" + UserData + "</UserArea>");
            }
            sb.Append("</DATA>");
            sb.Append("</EpointDataBody>");

            //保存接口调用日志
            //string ClientIP = Context.Request.ServerVariables.GetValues("REMOTE_ADDR")[0];
            //DB_XXTWebServiceLog.InsertLog(ClientIP, MethodName, System.Text.Encoding.Default.GetBytes(XMLPars), System.Text.Encoding.Default.GetBytes(sb.ToString()), status ? "1" : "0", description);

            return sb.ToString();
        }

新增成功时返回插入行的RowGuid
<?xml version="1.0" encoding="gb2312"?>
<EpointDataBody>
<DATA><ReturnInfo><Status>True</Status><Description>
<![CDATA[插入成功]]>
</Description></ReturnInfo><UserArea>
<RowGuid>42ccaec8-9091-4950-a653-ecbb4328428c</RowGuid>
</UserArea>
</DATA>
</EpointDataBody>
一个月份重复插入时返回：
<EpointDataBody><DATA>
<ReturnInfo><Status>False</Status>
<Description><![CDATA[月度计划重复]]>
</Description></ReturnInfo></DATA>
</EpointDataBody>