C#保存与读取DataTable信息到XML格式的方法

/// <summary>/// 将DataTable的内容写入到XML文件中/// </summary>/// <param name="dt">数据源</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存在则直接删除  if (File.Exists(address))  {   File.Delete(address);  }  XmlTextWriter writer =    new XmlTextWriter(address, Encoding.GetEncoding("GBK"));  writer.Formatting = Formatting.Indented;  //XML文档创建开始  writer.WriteStartDocument();  writer.WriteComment("DataTable: " + dt.TableName);  writer.WriteStartElement("DataTable"); //DataTable开始  writer.WriteAttributeString("TableName", dt.TableName);  writer.WriteAttributeString("CountOfRows", dt.Rows.Count.ToString());  writer.WriteAttributeString("CountOfColumns", dt.Columns.Count.ToString());  writer.WriteStartElement("ClomunName", ""); //ColumnName开始  for (int i = 0; i < dt.Columns.Count; i++)  {   writer.WriteAttributeString(    "Column" + i.ToString(), dt.Columns[i].ColumnName);  }  writer.WriteEndElement(); //ColumnName结束  //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结束  writer.WriteEndDocument();  writer.Close();  //XML文档创建结束 } catch (Exception ex) {  Console.WriteLine(ex.Message);  return false; } return true;}

/// <summary>/// 从XML文件中读取一个DataTable/// </summary>/// <param name="dt">数据源</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");  //读取表名  dt.TableName = ((XmlElement)root).GetAttribute("TableName");  //Console.WriteLine("读取表名： {0}", dt.TableName);  //读取行数  int CountOfRows = 0;  if (!int.TryParse(((XmlElement)root).   GetAttribute("CountOfRows").ToString(), out CountOfRows))  {   throw new Exception("行数转换失败");  }  //读取列数  int CountOfColumns = 0;  if (!int.TryParse(((XmlElement)root).   GetAttribute("CountOfColumns").ToString(), out CountOfColumns))   {   throw new Exception("列数转换失败");  }  //从第一行中读取记录的列名  foreach (XmlAttribute xa in root.ChildNodes[0].Attributes)  {   dt.Columns.Add(xa.Value);   //Console.WriteLine("建立列： {0}", xa.Value);  }  //从后面的行中读取行信息  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.将DataTable内容写入到XML文件 //建立DataTable取名Table4Test DataTable dt1 = new DataTable("Table4Test"); //生成四列，列名为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"); //写入到XML if (WriteToXml(dt1, "DataTable.xml")) {  Console.WriteLine("写入成功"); } //================================ //2.从XML文件中读取内容到DataTable //读取信息 DataTable dt2 = ReadFromXml("DataTable.xml"); //输出读取的信息 Console.WriteLine("读取到的信息："); 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();}