C# datatable 与 xml文件之间的转换

/// <summary>
/// datatable转XML文件
/// </summary>
/// <param name="dtTable"></param>
/// <param name="strXMLPath"></param>
/// <returns></returns>
public bool DataTableToXML(DataTable dtTable, string strXMLPath)
{
MemoryStream stream = null;
XmlTextWriter writer = null;
DataSet ds=new DataSet ();
ds.Tables.Add(dtTable.Copy());
StreamWriter sw = null;
try
{
stream = new MemoryStream();
writer = new XmlTextWriter(stream, Encoding.UTF8);
ds.WriteXml(writer, XmlWriteMode.WriteSchema);
int nCount = (int)stream.Length;
byte[] arr = new byte[nCount];
stream.Seek(, SeekOrigin.Begin);
stream.Read(arr, , nCount);
UTF8Encoding utf = new UTF8Encoding();
string strContent = utf.GetString(arr).Trim();
sw = new StreamWriter(strXMLPath);
sw.Write(strContent);

return true;
}
catch (System.Exception vErr)
{
MessageBox.Show(vErr.Message);
return false;
}
finally
{
if (writer != null)
{
writer.Close();
}
if (sw != null)
{
sw.Close();
}
}
}
/// <summary>
/// 读取XML转datatable
/// </summary>
/// <param name="strXMLPath"></param>
/// <returns></returns>
public DataTable XMLToDataTable(string strXMLPath)
{
StringReader stream = null;
XmlTextReader reader = null;
StreamReader sr = null;
try
{
if (strXMLPath.Length <= )
{
return new DataTable();
}
sr = new StreamReader(strXMLPath);
string strXmlContent = sr.ReadToEnd();
stream = new StringReader(strXmlContent);
reader = new XmlTextReader(stream);
DataSet ds = new DataSet();
ds.ReadXml(reader);
return ds.Tables[];
}
catch (System.Exception vErr)
{
MessageBox.Show(vErr.Message);
}
finally
{
if (sr != null)
sr.Close();
if (reader != null)
reader.Close();
}
return new DataTable();
}