C#DataTable和XML互转

 public static string DataTableToXml(DataTable dt)
 {
         System.IO.TextWriter tw = new System.IO.StringWriter();
         dt.TableName = dt.TableName.Length == 0 ? "TableName" : dt.TableName;
         dt.WriteXml(tw);
         dt.WriteXmlSchema(tw);
         return tw.ToString();
 }
public static DataTable XmlToDataDable(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 dt = new DataTable();
        dt.ReadXmlSchema(trSchema);
        dt.ReadXml(trDataTable);
        return dt;
 }