c# XML的各种操作-Toy模板网

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c# XML的各种操作
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;
using System.Xml.Linq;

namespace LinqOperXML
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

static string strPath = “Employee.xml”;
static string strID = “”;

//窗体加载时加载XML文件
private void Form1_Load(object sender, EventArgs e)
{
getXmlInfo();
}

//添加XML元素
private void button2_Click(object sender, EventArgs e)
{
XElement xe = XElement.Load(strPath);
IEnumerable elements1 = from element in xe.Elements(“People”)
select element;
//生成新的编号
string str = (Convert.ToInt32(elements1.Max(element => element.Attribute(“ID”).Value)) + 1).ToString(“000”);
XElement people = new XElement(
“People”, new XAttribute(“ID”, str),
new XElement(“Name”, textBox11.Text),
new XElement(“Sex”, comboBox1.Text),
new XElement(“Salary”, textBox12.Text)
);
xe.Add(people);
xe.Save(strPath);
getXmlInfo();
}

//修改XML元素
private void button3_Click(object sender, EventArgs e)
{
if (strID != “”)
{
XElement xe = XElement.Load(strPath);
IEnumerable elements = from element in xe.Elements(“People”)
where element.Attribute(“ID”).Value == strID
select element;
if (elements.Count() > 0)
{
XElement newXE = elements.First();
newXE.SetAttributeValue(“ID”, strID);
newXE.ReplaceNodes(
new XElement(“Name”, textBox11.Text),
new XElement(“Sex”, comboBox1.Text),
new XElement(“Salary”, textBox12.Text)
);
}
xe.Save(strPath);
}
getXmlInfo();
}

//删除XML元素
private void button4_Click(object sender, EventArgs e)
{
if (strID != “”)
{
XElement xe = XElement.Load(strPath);
IEnumerable elements = from element in xe.Elements(“People”)
where element.Attribute(“ID”).Value == strID
select element;
if (elements.Count() > 0)
elements.First().Remove();
xe.Save(strPath);
}
getXmlInfo();
}

//显示选中XML节点的详细信息
private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
{
strID = dataGridView1.Rows[e.RowIndex].Cells[3].Value.ToString();
XElement xe = XElement.Load(strPath);
IEnumerable elements = from PInfo in xe.Elements(“People”)
where PInfo.Attribute(“ID”).Value == strID
select PInfo;
foreach (XElement element in elements)
{
textBox11.Text = element.Element(“Name”).Value;
comboBox1.SelectedItem = element.Element(“Sex”).Value;
textBox12.Text = element.Element(“Salary”).Value;
}
}

#region 将XML文件内容绑定到DataGridView控件
///
/// 将XML文件内容绑定到DataGridView控件
///
private void getXmlInfo()
{
DataSet myds = new DataSet();
myds.ReadXml(strPath);
dataGridView1.DataSource = myds.Tables[0];
}
#endregion
}
}文章来源地址https://www.toymoban.com/news/detail-509640.html

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