XML的基本操作--

XML的增删改查，后台逻辑代码已给出，至于前台数据录入有兴趣可以试试（简单三层）！

XML转化为DataTable

StudentInfo.xml文件内容：

<?xml version="1.0" encoding="GB2312"?>
<students>
<student c_id="1" c_code="2101224101" c_name="One" c_remark="c_remark" c_type="2010" c_status="0" />
</students>

CmdInfoDAL类:

public class CmdInfoDAL
{
public static DbBase db = new DbBase();
#region XML的基本操作
/// <summary>
/// 新增
/// </summary>
/// <param name="entity"></param>
/// <param name="xmlName">StudentInfo</param>
/// <param name="nodeDir">students/student</param>
public void AddCmdInfo(CmdInfo entity,string xmlName,string nodeDir)
{
string xmlrootDir = db.xmlrootDir;
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(xmlrootDir + "\\" + xmlName);
XmlNode root = xmlDoc.SelectSingleNode("students");//查找
XmlNodeList studentNodeList = xmlDoc.SelectNodes(nodeDir);
if (studentNodeList != null)
{
int cloumnCounts = studentNodeList[0].Attributes.Count;
string[] nodeAttributesName = new string[cloumnCounts];
for (int i = 0; i < cloumnCounts; i++)
{
nodeAttributesName[i] = studentNodeList[0].Attributes[i].Name;
}
string nodeName = nodeDir.Substring(nodeDir.LastIndexOf("/") + 1);//获取结点名字
XmlElement xeItem = xmlDoc.CreateElement(nodeName);//创建一个名为nodeName的结点
xeItem.SetAttributeNode(nodeAttributesName[0], (studentNodeList.Count + 1).ToString());//设置节点的“c_id属性”值，在已有的基础上Counts+1
//然后绑定entity实例
root.AppendChild(xeItem);//将节点加上父目录
xmlDoc.Save(xmlrootDir + "\\" + xmlName);
}
}
/// <summary>
///删除XML指定目录下column
/// </summary>
/// <param name="macroType"></param>
/// <param name="xmlName"></param>
/// <param name="nodeXml"></param>
/// <returns></returns>
public int DeleteXmlCmdInfoByType(string Type, string xmlName, string nodeDir)
{
int delCounts = 0;
string xmlrootDir = db.xmlrootDir;
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(xmlrootDir + "\\" + xmlName);
//XmlNode root = xmlDoc.SelectSingleNode("students");//查找
XmlNodeList studentNodeList = xmlDoc.SelectNodes(nodeDir);
if (studentNodeList != null)
{
foreach (XmlNode studentNode in studentNodeList)
{
if (studentNode.Attributes["c_type"].Value == Type && studentNode.Attributes["c_status"].Value == "0")
{
studentNode.Attributes["c_status"].Value = "1";
delCounts++;
}
}
xmlDoc.Save(xmlrootDir + "\\" + xmlName);
}
return delCounts;
}
/// <summary>
/// 删除指定目录下column的值为“Id”的行
/// </summary>
/// <param name="Id"></param>
/// <param name="xmlName"></param>
/// <param name="nodeDir"></param>
/// <returns></returns>
public int DeleteXmlCmdInfoById(int Id, string xmlName, string nodeDir)
{
int delCounts = 0;
string xmlrootDir = db.xmlrootDir;
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(xmlrootDir + "\\" + xmlName);
//XmlNode root = xmlDoc.SelectSingleNode("students");//查找
XmlNodeList studentNodeList = xmlDoc.SelectNodes(nodeDir);
if (studentNodeList != null)
{
foreach (XmlNode studentNode in studentNodeList)
{
if (studentNode.Attributes[0].Value == Id.ToString() && studentNode.Attributes["c_status"].Value == "0")
{
//假删除
studentNode.Attributes["c_status"].Value = "1";
//真删除
//xmlDoc.RemoveChild(studentNode);
delCounts++;
}
}
xmlDoc.Save(xmlrootDir + "\\" + xmlName);
}
return delCounts;
}
/// <summary>
/// 修改指定目录下column值为“entity.Id”的行
/// </summary>
/// <param name="entity"></param>
/// <param name="xmlName"></param>
/// <param name="nodeDir"></param>
/// <returns></returns>
public void UpdateXmlCmdInfoById(CmdInfo entity, string xmlName, string nodeDir)
{
string xmlrootDir = db.xmlrootDir;
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(xmlrootDir + "\\" + xmlName);
//XmlNode root = xmlDoc.SelectSingleNode("students");//查找
XmlNodeList studentNodeList = xmlDoc.SelectNodes(nodeDir);
if (studentNodeList != null)
{
foreach (XmlNode studentNode in studentNodeList)
{
if (studentNode.Attributes[0].Value == entity.c_id.ToString() && studentNode.Attributes["c_status"].Value == "0")
{
studentNode.Attributes["c_code"].Value = entity.c_code;
studentNode.Attributes["c_name"].Value = entity.c_name;
studentNode.Attributes["c_remark"].Value = entity.c_remark;
studentNode.Attributes["c_type"].Value = entity.c_type;
break;//不是循环更新
}
}
xmlDoc.Save(xmlrootDir + "\\" + xmlName);
}
}
/// <summary>
/// 获取实例By主键Id
/// </summary>
/// <param name="Id"></param>
/// <param name="xmlName"></param>
/// <param name="nodeDir"></param>
/// <returns></returns>
public CmdInfo GetXmlCmdInfoModel(int Id, string xmlName, string nodeDir)
{
string xmlrootDir = db.xmlrootDir;
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(xmlrootDir + "\\" + xmlName);
//XmlNode root = xmlDoc.SelectSingleNode("students");//查找
XmlNodeList studentNodeList = xmlDoc.SelectNodes(nodeDir);
CmdInfo entity = null;
if (studentNodeList != null)
{
foreach (XmlNode studentNode in studentNodeList)
{
if (studentNode.Attributes[0].Value == Id.ToString() && studentNode.Attributes["c_status"].Value == "0")
{
entity.c_code = studentNode.Attributes["c_code"].Value;
entity.c_name = studentNode.Attributes["c_name"].Value;
entity.c_remark = studentNode.Attributes["c_remark"].Value;
entity.c_type = studentNode.Attributes["c_type"].Value;
break;
}
}
}
return entity;
}
/// <summary>
/// 获取文件名为xmlName的目录为nodeDir的所有数量
/// </summary>
/// <param name="xmlName"></param>
/// <param name="nodeDir"></param>
/// <returns></returns>
public int GetXmlCmdInfoCounts(string xmlName, string nodeDir)
{
string xmlrootDir = db.xmlrootDir;
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(xmlrootDir + "\\" + xmlName);
//XmlNode root = xmlDoc.SelectSingleNode("students");//查找
XmlNodeList studentNodeList = xmlDoc.SelectNodes(nodeDir);
int rowCounts = 0;
if (studentNodeList != null)
{
foreach (XmlNode studentNode in studentNodeList)
{
rowCounts++;
}
}
return rowCounts;
}
/// <summary>
/// 将Xml指定column值为columnValue的行转化为DataTable
/// </summary>
/// <param name="xmlName">指定目录下文件名</param>
/// <param name="columnName">查询column字段</param>
/// <param name="columnValue">查询column值满足的值</param>
/// <param name="nodeDir">在Xml文件内字节路径</param>
/// <returns></returns>
public DataTable XmlToDataTable(string xmlName, string columnName, string columnValue, string nodeDir)
{
string xmlrootDir = db.xmlrootDir;
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(xmlrootDir + "\\" + xmlName);
//XmlNode root = xmlDoc.SelectSingleNode("students");//查找
XmlNodeList studentNodeList = xmlDoc.SelectNodes(nodeDir);
DataTable dt = new DataTable();
if (studentNodeList != null)
{
dt.Columns.Clear();
int columnCounts = studentNodeList[0].Attributes.Count;
for (int i = 0; i < columnCounts; i++)
{
dt.Columns.Add(studentNodeList[0].Attributes[i].Value);
}
foreach (XmlNode studentNode in studentNodeList)
{

if (studentNode.Attributes[columnName].Value == columnValue && studentNode.Attributes["c_status"].Value == "0")
{
DataRow dr =dt.NewRow();
for (int i = 0; i < columnCounts; i++)
{
dr[i] = studentNode.Attributes[i].Value;
}
dt.Rows.Add(dr);
}
}
}
return dt;
}
/// <summary>
/// 将Xml文件转化为DataTable
/// </summary>
/// <param name="xmlName"></param>
/// <param name="nodeDir"></param>
/// <returns></returns>
public DataTable XmlToDataTable(string xmlName,string nodeDir)
{
string xmlrootDir = db.xmlrootDir;
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(xmlrootDir + "\\" + xmlName);
//XmlNode root = xmlDoc.SelectSingleNode("students");//查找
XmlNodeList studentNodeList = xmlDoc.SelectNodes(nodeDir);
DataTable dt = new DataTable();
if (studentNodeList != null)
{
dt.Columns.Clear();
int columnCounts = studentNodeList[0].Attributes.Count;
for (int i = 0; i < columnCounts; i++)
{
dt.Columns.Add(studentNodeList[0].Attributes[i].Value);
}
foreach (XmlNode studentNode in studentNodeList)
{

if (studentNode.Attributes["c_status"].Value == "0")
{
DataRow dr = dt.NewRow();
for (int i = 0; i < columnCounts; i++)
{
dr[i] = studentNode.Attributes[i].Value;
}
dt.Rows.Add(dr);
}
}
}
return dt;
}
public DataTable XmlToDataTable(string xmlName,string columnName,string[] columnValueArry, string nodeDir)
{
string xmlrootDir = db.xmlrootDir;
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(xmlrootDir + "\\" + xmlName);
//XmlNode root = xmlDoc.SelectSingleNode("students");//查找
XmlNodeList studentNodeList = xmlDoc.SelectNodes(nodeDir);
DataTable dt = new DataTable();
if (studentNodeList != null)
{
dt.Columns.Clear();
int columnCounts = studentNodeList[0].Attributes.Count;
for (int i = 0; i < columnCounts; i++)
{
dt.Columns.Add(studentNodeList[0].Attributes[i].Value);
}
foreach (XmlNode studentNode in studentNodeList)
{
foreach (string columnValue in columnValueArry)
{
if (studentNode.Attributes[columnName].Value == columnValue && studentNode.Attributes["c_status"].Value == "0")
{
DataRow dr = dt.NewRow();
for (int i = 0; i < columnCounts; i++)
{
dr[i] = studentNode.Attributes[i].Value;
}
dt.Rows.Add(dr);
}
}
}
}
return dt;
}
#endregion
}

CmdInfo类：

public class CmdInfo
{
public CmdInfo()
{ }
private string _c_id;
private string _c_code;
private string _c_name;
private string _c_remark;
private string _c_type;
private string _c_status;
/// <summary>
///
/// </summary>
public string c_id
{
set { _c_id = value; }
get { return _c_id; }
}
public string c_code
{
set { _c_code = value; }
get { return _c_code; }
}
public string c_name
{
set { _c_name = value; }
get { return _c_name; }
}
public string c_remark
{
set { _c_remark = value; }
get { return _c_remark; }
}
public string c_type
{
set { _c_type = value; }
get { return _c_type; }
}
public string c_status
{
set { _c_status = value; }
get { return _c_status; }
}
}

DbBase类：

public class DbBase
{
public static string xmlrootDirStr = Directory.GetCurrentDirectory();
public string xmlrootDir
{
get {
string rootDirStr = xmlrootDirStr.ToString();
rootDirStr = rootDirStr.Substring(0,rootDirStr.LastIndexOf("\\"));
rootDirStr = rootDirStr.Substring(0, rootDirStr.LastIndexOf("\\"));
return rootDirStr + @"\XmlFile";
}
}
}