C#读取xml呀高手进来给指点一下

protected void BuildFields(XmlNode root, EntityData entity)

        {

            XmlNodeList list = root.SelectNodes("MemberDefinition/EntityMember");

            if (((this.menbers != null) && (this.menbers.Length > 0)) && (list != null))

            {

                for (int i = 0; i < list.Count; i++)

                {

                    string name = list[i].Attributes["Name"].Value;

                    if (entity.Tables.Contains(name))

                    {

                        DataTable table = entity.Tables[name];

                        XmlNodeList list2 = list[i].SelectNodes("Fields/Field");

                        for (int j = 0; j < list2.Count; j++)

                        {

                            DataColumn column = new DataColumn(list2[j].Attributes["Name"].Value, Type.GetType(list2[j].Attributes["DataType"].Value));

                            if (list2[j].Attributes["DefaultValue"] != null)

                            {

                                column.DefaultValue = list2[j].Attributes["DefaultValue"].Value;

                            }

                            table.Columns.Add(column);

                        }

                        XmlNodeList list3 = list[i].SelectNodes("Keys/Key");

                        if ((list3 != null) && (list3.Count > 0))

                        {

                            DataColumn[] columnArray = new DataColumn[list3.Count];

                            for (int k = 0; k < list3.Count; k++)

                            {

                                columnArray[k] = table.Columns[list3[k].Attributes["Name"].Value];

                                if (columnArray[k].DefaultValue.Equals(DBNull.Value))

                                {

                                    columnArray[k].DefaultValue = "0";

                                }

                            }

                            table.PrimaryKey = columnArray;

                        }

                    }

                }

            }

        }

XmlDocument xdoc = new XmlDocument();

xdoc.Load("data.xml");



//string query = "T_D_FJS_DY_TENDER/T_D_FJS_APPMETHOD/T_D_FJS_PARENT_RESULT/SUGGEST";

string query = "T_D_FJS_DY_TENDER/T_D_FJS_APPMETHOD/T_D_FJS_APPMETHOD_TYPE/T_D_FJS_TENDER_RESULT/SUGGEST";

XmlNodeList list = xdoc.SelectNodes(getXPathStr(query));



foreach (XmlNode xn in list)

            {

                textBox1.Text += xn.InnerText+"   ";

            }





//拼接XPATH的方法

        public string getXPathStr(string query)

        {

            string result = "//body";

            string[] arr = query.Split(new string[] { "/" },StringSplitOptions.RemoveEmptyEntries);

            for (int i = 0; i < arr.Length - 1; i++)

            {

                if (arr[i].ToLower() != "suggest")

                {

                    //依次选取group节点的dbidentify属性为对应的值

                    result += "/group[@dbidentify='" + arr[i] + "']";

                }

                else

                {

                    //suggest的节点名称不同

                    result += "/field[@dbidentify='SUGGEST']";

                }

            }

            return result;

        }