求大神。本人想做一个选中多个表。导出成XML格式的文件解决方法

求大神。本人想做一个选中多个表。导出成XML格式的文件
 public string GenerateXML(string strTableName)
        {
            // 根节点添加到文档中
            XmlDocument doc = new XmlDocument();
            XmlElement Root = doc.CreateElement("data");//主内容
            doc.AppendChild(Root);

            string[] arrTables = strTableName.Split(',');

            for (int intI = 0; intI < arrTables.Count(); intI++)
            {
                XmlElement Child = doc.CreateElement("ROWSET");
                XmlAttribute attr = doc.CreateAttribute("tableName");
                attr.Value = arrTables[intI];
                Child.Attributes.Append(attr);
                Root.AppendChild(Child);

                // 获取表结构
                DataSet dsInfo = services.SqlHelper.ExecuteDataSet("SELECT NAME AS FIELD_NAME,LENGTH AS FIELD_LENGTH FROM syscolumns WHERE id=object_id('" + arrTables[intI] + "')");
                //获取表数据
                DataSet dsData = services.SqlHelper.ExecuteDataSet("SELECT * FROM " + arrTables[intI] + "");


                for (int intJ = 0; intJ < dsData.Tables[0].Rows.Count; intJ++)
                {
                    XmlElement Child1 = doc.CreateElement("ROW");
                    XmlAttribute attr1 = doc.CreateAttribute("action");
                    attr1.Value = "insert";
                    Child1.Attributes.Append(attr1);
                    Child.AppendChild(Child1);

                    for (int intK = 0; intK < dsInfo.Tables[0].Rows.Count; intK++)
                    {
                        XmlElement field = doc.CreateElement("Field");
                        XmlAttribute fieldName = doc.CreateAttribute("fieldName");//列名
                        XmlAttribute fieldLength = doc.CreateAttribute("maxLength");//列的长度

                        fieldName.Value = dsInfo.Tables[0].Rows[intK]["FIELD_NAME"].ToString();
                        fieldLength.Value = dsInfo.Tables[0].Rows[intK]["FIELD_LENGTH"].ToString();
                        field.InnerText = dsData.Tables[0].Rows[intJ][fieldName.Value].ToString();

                        field.Attributes.Append(fieldName);
                        field.Attributes.Append(fieldLength);
                        Child1.AppendChild(field);
                    }