XML转DataTable转XML

public static string ConvertBetweenDataTableAndXML_AX(DataTable dtNeedCoveret) { System.IO.TextWriter tw = new System.IO.StringWriter(); dtNeedCoveret.TableName = dtNeedCoveret.TableName.Length == 0 ? "Table_AX" : dtNeedCoveret.TableName; dtNeedCoveret.WriteXml(tw); dtNeedCoveret.WriteXmlSchema(tw); return tw.ToString(); } public static DataTable ConvertBetweenDataTableAndXML_AX(string xml) { System.IO.TextReader trDataTable = new System.IO.StringReader(xml.Substring(0, xml.IndexOf("<?xml"))); System.IO.TextReader trSchema = new System.IO.StringReader(xml.Substring(xml.IndexOf("<?xml"))); DataTable dtReturn = new DataTable(); dtReturn.ReadXmlSchema(trSchema); dtReturn.ReadXml(trDataTable); return dtReturn; }