.Net XML 与 DataSet 相互转换

.Net 的XML与DataSet 相互转换代码模版：

public static DataSet ConvertXMLFileToDataSet(string xmlText)
{
StringReader stream = null;
     XmlTextReader reader = null;
     try
{
         DataSet xmlDS = new DataSet();
stream = new StringReader(xmlText);
reader = new XmlTextReader(stream);
xmlDS.ReadXml(reader);
reader.Close();
         return xmlDS;
}
     catch (System.Exception ex)
{
reader.Close();
}
}

public static string DataToXml(DataSet ds)
{
     if (ds != null && ds.Tables.Count > 0)
{
         MemoryStream ms = null;
         XmlTextWriter XmlWt = null;
         try
{
ms = new MemoryStream();              
XmlWt = new XmlTextWriter(ms, Encoding.Unicode);
//获取ds中的数据
ds.WriteXml(XmlWt);
int count = (int)ms.Length;
byte[] temp = new byte[count];
ms.Seek(0, SeekOrigin.Begin);
ms.Read(temp, 0, count);
//返回Unicode编码的文本
UnicodeEncoding ucode = new UnicodeEncoding();
string returnValue = ucode.GetString(temp).Trim();
return returnValue;
}
catch (System.Exception ex)
{

}
finally
{
if (XmlWt != null)
{
XmlWt.Close();
ms.Close();
}
}
}
else       
return “”;        
}