1.C#操作XML文件
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Xml;
namespace XMLFileOperate
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
static public string strName = "";//记录读取时XML文件路径
static public string strOne = "";//定义两个变量保存文本框内的值
static public string strTwo = "";
static public string strThree = "";//保存子标记名称
static public string strFour = "";//保存第二个子节点的属性名
static public string strFive = "";//保存第二个节点的属性值
static public string strSix = "";//保存节点路径
private XmlDocument xmlDocument = new XmlDocument();
private XmlNode xmlNode;
private XmlElement xmlElement;
DataSet dataSet = new DataSet();//声明此数据集，存储读取出的XML数据
private void Form1_Load(object sender, EventArgs e)
{
strName = "fileTwo.xml";
if (File.Exists(strName))
{
ShowXml();
button3.Enabled = false;
}
else
{
button3.Enabled = true;
}
}
//修改创建的XML文件
private void button7_Click(object sender, EventArgs e)
{
//修改第一个节点的属性
xmlDocument.Load(strName);
XmlNode nodeOne = xmlDocument.SelectSingleNode("//" + strThree);
XmlElement ElementOne = (XmlElement)nodeOne;
ElementOne.SetAttribute(attribute.Text, textBox4.Text);
//修改第一个节点的值
XmlNode nodeTwo = xmlDocument.SelectSingleNode("//" + strThree + "/*");
XmlElement ElementTwo = (XmlElement)nodeTwo;
ElementTwo.InnerText = nodeContent.Text;
//修改第二个节点的属性值
XmlNode mainNodeThree = xmlDocument.SelectSingleNode("//" + textBox7.Text + "[@" + strFour + "='" + strFive + "']");
XmlElement ElementThree = (XmlElement)mainNodeThree;
ElementThree.SetAttribute(textBox10.Text, textBox8.Text);
//修改第二个节点的值
XmlNode nodeFour = xmlDocument.SelectSingleNode("//" + textBox7.Text + "[@" + strFour + "='" + textBox8.Text + "']/*");
XmlElement ElementFour = (XmlElement)nodeFour;
ElementFour.InnerText = textBox11.Text;
xmlDocument.Save(strName);
MessageBox.Show("恭喜你，修改成功！", "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
ShowXml();
}
private void dataGridView1_SelectionChanged(object sender, EventArgs e)
{
//修改文本框的ReadOnly属性
readOnlytrue();
//选定DataGridView中的一条记录在文本框内显示
for (int i = 0; i < dataGridView1.Rows.Count; i++) //遍历DataGridView中的每一行信息
{
if (dataGridView1.Rows[i].Selected)//判断该行是否被选中
{
if (i <= 0)
{
nodeContent.Text = dataGridView1.Rows[i].Cells[childNode.Text].Value.ToString(); //在文本框内显示XML文件内的信息
textBox4.Text = dataGridView1.Rows[i].Cells[attribute.Text].Value.ToString();
strOne = nodeContent.Text;
}
if (i > 0)
{
textBox11.Text = dataGridView1.Rows[i].Cells[childNode.Text].Value.ToString();
textBox8.Text = dataGridView1.Rows[i].Cells[attribute.Text].Value.ToString();
strTwo = textBox11.Text;
strFive = textBox8.Text;
}
}
}
//从指定路径加载XML文档
xmlDocument.Load(strName);
//从根节点开始读取
XmlNode xNode = (XmlNode)xmlDocument.DocumentElement;
root.Text = xNode.Name;
//读取子节点的属性及内容
XmlNode nodeTwo = xmlDocument.SelectSingleNode(root.Text + "/*");
firstNode.Text = nodeTwo.Name;
textBox7.Text = firstNode.Text;
strThree = firstNode.Text;
//读取次子节点的名称及内容
XmlNode nodeThree = xmlDocument.SelectSingleNode(root.Text + "/" + firstNode.Text + "/*");
childNode.Text = nodeThree.Name;
textBox9.Text = childNode.Text;
//读取指定节点的属性名
XmlNode nodeOne = xmlDocument.SelectSingleNode("//" + firstNode.Text);
XmlAttributeCollection xmlAttribute = nodeOne.Attributes;
for (int i = 0; i < xmlAttribute.Count; i++)
{
if (i == 0)
{
attribute.Text = xmlAttribute.Item(i).Name;
textBox10.Text = attribute.Text;
strFour = textBox10.Text;
}
}
}
//自定义一个方法更改文本框的只读属性
private void readOnlytrue()
{
root.ReadOnly = true;
childNode.ReadOnly = true;
attribute.ReadOnly = true;
firstNode.ReadOnly = true;
textBox7.ReadOnly = true;
textBox9.ReadOnly = true;
textBox10.ReadOnly = true;
}
//选定DataGridView中的数据，进行删除操作
private void button2_Click(object sender, EventArgs e)
{
//判断是否有选中行
if (dataGridView1.SelectedRows.Count != 0)
{
xmlDocument.Load(strName);
//通过循环获取选中行的XPath
for (int i = 0; i < dataGridView1.Rows.Count; i++) //遍历DataGridView中的每一行信息
{
if (dataGridView1.Rows[i].Selected)//判断该行是否被选中
{
string attriString = dataGridView1.Rows[i].Cells[attribute.Text].Value.ToString();
strSix = root.Text + "/" + strThree + "[@" + strFour + "='" + attriString + "']";//被选中节点的XPath
}
}
string mainNode = strSix.Substring(0, strSix.LastIndexOf("/"));
xmlDocument.SelectSingleNode(mainNode).RemoveChild(xmlDocument.SelectSingleNode(strSix));//从XML文件下移除节点的语句
xmlDocument.Save(strName);
ShowXml();
}
else
{
MessageBox.Show("暂无选中行，不能进行删除操作！", "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
//添加记录到当前节点下
private void button1_Click(object sender, EventArgs e)
{
if (textBox6.Text != "")
{
xmlDocument.Load(strName);
//添加节点的属性及属性值
XmlNode nodeOne = xmlDocument.SelectSingleNode(root.Text);
XmlElement elementOne = xmlDocument.CreateElement(textBox6.Text);
elementOne.SetAttribute(textBox3.Text, textBox1.Text);
nodeOne.AppendChild(elementOne);
//添加当前节点的子节点及节点内容
XmlNode nodeTwo = xmlDocument.SelectSingleNode("//" + textBox6.Text + "[@" + strFour + "='" + textBox1.Text + "']");
XmlElement elementTwo = xmlDocument.CreateElement(textBox2.Text);
elementTwo.InnerText = textBox5.Text;
nodeTwo.AppendChild(elementTwo);
xmlDocument.Save(strName);
MessageBox.Show("节点添加成功！", "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
ShowXml();
}
else
{
MessageBox.Show("节点内容不能为空！", "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
//读取XML文件
public void ShowXml()
{
//读取XML文件信息
dataSet.Clear();
dataSet.ReadXml(strName);
dataGridView1.DataSource = dataSet.Tables[0].DefaultView;
}
//创建一个XML文档
private void button3_Click(object sender, EventArgs e)
{
//添加XML的声明部分
xmlNode = xmlDocument.CreateNode(XmlNodeType.XmlDeclaration, "", "");
xmlDocument.AppendChild(xmlNode);
//添加一个根节点
xmlElement = xmlDocument.CreateElement("", root.Text, "");
xmlDocument.AppendChild(xmlElement);
//添加一个带属性值的次根节点
XmlNode mainNode = xmlDocument.SelectSingleNode(root.Text);
XmlElement ElementTwo = xmlDocument.CreateElement(firstNode.Text);
ElementTwo.SetAttribute(attribute.Text, textBox4.Text);
mainNode.AppendChild(ElementTwo);
//在当前节点添加一个仅带值的节点
XmlNode mainNodeOne = xmlDocument.SelectSingleNode(@root.Text + "/" + firstNode.Text);
XmlElement ElementThree = xmlDocument.CreateElement(childNode.Text);
ElementThree.InnerText = nodeContent.Text;
mainNodeOne.AppendChild(ElementThree);
//在根节点下，添加第二个子节点
XmlNode mainNodeTwo = xmlDocument.SelectSingleNode(root.Text);
XmlElement ElementFour = xmlDocument.CreateElement(textBox7.Text);
ElementFour.SetAttribute(textBox10.Text, textBox8.Text);
mainNodeTwo.AppendChild(ElementFour);
strFour = textBox10.Text;
//在当前节点添加一个仅带值的节点
XmlNode mainNodeThree = xmlDocument.SelectSingleNode("//" + textBox7.Text + "[@" + strFour + "='" + textBox8.Text + "']");
XmlElement ElementFive = xmlDocument.CreateElement(textBox9.Text);
ElementFive.InnerText = textBox11.Text;
mainNodeThree.AppendChild(ElementFive);
SaveFileDialog saveDialog = new SaveFileDialog();
saveDialog.Filter = "XML文件（*.XML）|*.XML";
if (saveDialog.ShowDialog() == DialogResult.OK)
{
xmlDocument.Save(saveDialog.FileName);
}
}
}
}
