/// <summary>
/// 將DataTable的內(nèi)容寫入到XML文件中
/// </summary>
/// <param name="dt">數(shù)據(jù)源</param>
/// <param name="address">XML文件地址</param>
public static bool WriteToXml(DataTable dt, string address)
{
 try
 {
  //如果文件DataTable.xml存在則直接刪除
  if (File.Exists(address))
  {
   File.Delete(address);
  }
  XmlTextWriter writer = 
   new XmlTextWriter(address, Encoding.GetEncoding("GBK"));
  writer.Formatting = Formatting.Indented;
  //XML文檔創(chuàng)建開始
  writer.WriteStartDocument();
  writer.WriteComment("DataTable: " + dt.TableName);
  writer.WriteStartElement("DataTable"); //DataTable開始
  writer.WriteAttributeString("TableName", dt.TableName);
  writer.WriteAttributeString("CountOfRows", dt.Rows.Count.ToString());
  writer.WriteAttributeString("CountOfColumns", dt.Columns.Count.ToString());
  writer.WriteStartElement("ClomunName", ""); //ColumnName開始
  for (int i = 0; i < dt.Columns.Count; i++)
  {
   writer.WriteAttributeString(
    "Column" + i.ToString(), dt.Columns[i].ColumnName);
  }
  writer.WriteEndElement(); //ColumnName結(jié)束
  //按行各行
  for (int j = 0; j < dt.Rows.Count; j++)
  {
   writer.WriteStartElement("Row" + j.ToString(), "");
   //打印各列
   for (int k = 0; k < dt.Columns.Count; k++)
   {
    writer.WriteAttributeString(
     "Column" + k.ToString(), dt.Rows[j][k].ToString());
   }
   writer.WriteEndElement();
  }
  writer.WriteEndElement(); //DataTable結(jié)束
  writer.WriteEndDocument();
  writer.Close();
  //XML文檔創(chuàng)建結(jié)束
 }
 catch (Exception ex)
 {
  Console.WriteLine(ex.Message);
  return false;
 }
 return true;
}

/// <summary>
/// 從XML文件中讀取一個DataTable
/// </summary>
/// <param name="dt">數(shù)據(jù)源</param>
/// <param name="address">XML文件地址</param>
/// <returns></returns>
public static DataTable ReadFromXml(string address)
{
 DataTable dt = new DataTable();
 try
 {
  if (!File.Exists(address))
  {
   throw new Exception("文件不存在!");
  }
  XmlDocument xmlDoc = new XmlDocument();
  xmlDoc.Load(address);
  XmlNode root = xmlDoc.SelectSingleNode("DataTable");
  //讀取表名
  dt.TableName = ((XmlElement)root).GetAttribute("TableName");
  //Console.WriteLine("讀取表名： {0}", dt.TableName);
  //讀取行數(shù)
  int CountOfRows = 0;
  if (!int.TryParse(((XmlElement)root).
   GetAttribute("CountOfRows").ToString(), out CountOfRows))
  {
   throw new Exception("行數(shù)轉(zhuǎn)換失敗");
  }
  //讀取列數(shù)
  int CountOfColumns = 0;
  if (!int.TryParse(((XmlElement)root).
   GetAttribute("CountOfColumns").ToString(), out CountOfColumns)) 
  {
   throw new Exception("列數(shù)轉(zhuǎn)換失敗");
  }
  //從第一行中讀取記錄的列名
  foreach (XmlAttribute xa in root.ChildNodes[0].Attributes)
  {
   dt.Columns.Add(xa.Value);
   //Console.WriteLine("建立列： {0}", xa.Value);
  }
  //從后面的行中讀取行信息
  for (int i = 1; i < root.ChildNodes.Count; i++)
  {
   string[] array = new string[root.ChildNodes[0].Attributes.Count];
   for (int j = 0; j < array.Length; j++)
   {
    array[j] = root.ChildNodes[i].Attributes[j].Value.ToString();
   }
   dt.Rows.Add(array);
   //Console.WriteLine("行插入成功");
  }
 }
 catch (Exception ex)
 {
  Console.WriteLine(ex.Message);
  return new DataTable();
 }
 return dt;
}

static void Main(string[] args)
{
 //1.將DataTable內(nèi)容寫入到XML文件
 //建立DataTable取名Table4Test
 DataTable dt1 = new DataTable("Table4Test");
 //生成四列，列名為Column0-3
 dt1.Columns.Add("Column0");
 dt1.Columns.Add("Column1");
 dt1.Columns.Add("Column2");
 dt1.Columns.Add("Column3");
 //生成四行
 dt1.Rows.Add("A0", "A1", "A2", "A3");
 dt1.Rows.Add("B0", "B1", "B2", "B3");
 dt1.Rows.Add("C0", "C1", "C2", "C3");
 //寫入到XML
 if (WriteToXml(dt1, "DataTable.xml"))
 {
  Console.WriteLine("寫入成功");
 }
 //================================
 //2.從XML文件中讀取內(nèi)容到DataTable
 //讀取信息
 DataTable dt2 = ReadFromXml("DataTable.xml");
 //輸出讀取的信息
 Console.WriteLine("讀取到的信息：");
 for (int i = 0; i < dt2.Rows.Count; i++)
 {
  for (int j = 0; j < dt2.Columns.Count; j++)
  {
   Console.Write(dt2.Rows[i][j].ToString() + "\t");
  }
  Console.WriteLine();
 }
 Console.ReadLine();
}