/// <summary>
/// 删除一条信息
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Btn_Delete_Click(object sender, EventArgs e)
{
XmlDocument document = new XmlDocument();
document.Load("BookXML.xml");
//选择一个根元素
XmlElement element = document.DocumentElement;
string strPath = string.Format("/bookstore/book[@ISBN=\"{0}\"]", dataGridView1.CurrentRow.Cells[1].Value.ToString());
XmlElement selectXe = (XmlElement)element.SelectSingleNode(strPath); //selectSingleNode 根据XPath表达式,获得符合条件的第一个节点.
selectXe.ParentNode.RemoveChild(selectXe);
//Linq 删除数据
LinqXML.LinqXMLDeleteFunc(dataGridView1);
MessageBox.Show("删除成功！");
//Linq 删除所有数据
LinqXML.LinqXMLDeleteAllFunc();
MessageBox.Show("删除成功！");
}
/// <summary>
/// 读取XML信息
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Btn_ReadXML_Click(object sender, EventArgs e)
{
List <BookModel> bookModels = new List <BookModel>();
//加载XML
XmlDocument document = new XmlDocument();
XmlReaderSettings xmlReaderSettings = new XmlReaderSettings
{
IgnoreComments = true
};
XmlReader reader = XmlReader.Create("BookXML.xml", xmlReaderSettings);
document.Load(reader);
//获取XML根节点
XmlNode xmlNode = document.SelectSingleNode("bookstore");
//获取XML根节点下所有子节点
XmlNodeList xmlNodeList = xmlNode.ChildNodes;
foreach (XmlNode node in xmlNodeList)
{
BookModel bookModel = new BookModel();
//将节点转换为元素，便于得到节点属性
XmlElement xmlElement = (XmlElement)node;
bookModel.BookType = xmlElement.GetAttribute("Type").ToString();
bookModel.BookISBN = xmlElement.GetAttribute("ISBN").ToString();
//获取book节点中的所有子节点
XmlNodeList nodeList = node.ChildNodes;
bookModel.BookName = nodeList.Item(0).InnerText;
bookModel.BookAuthor = nodeList.Item(1).InnerText;
bookModel.BookPrice = Convert.ToDouble(nodeList.Item(2).InnerText);
bookModels.Add(bookModel);
}
dataGridView1.AutoGenerateColumns = false;
dataGridView1.DataSource = bookModels;
reader.Close();
//Linq 读取
IEnumerable <XElement> elements = LinqXML.LinqReadXM了Func();
showInfoByElements(elements);
}
/// <summary>
/// 修改一条信息
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Btn_Modify_Click(object sender, EventArgs e)
{
XmlDocument document = new XmlDocument();
document.Load("BookXML.xml");
XmlElement xe = document.DocumentElement; // DocumentElement 获取xml文档对象的根XmlElement.
string strPath = string.Format("/bookstore/book[@ISBN=\"{0}\"]", dataGridView1.CurrentRow.Cells[1].Value.ToString());
XmlElement selectXe = (XmlElement)xe.SelectSingleNode(strPath); //selectSingleNode 根据XPath表达式,获得符合条件的第一个节点.
selectXe.SetAttribute("Type", dataGridView1.CurrentRow.Cells[0].Value.ToString()); //也可以通过SetAttribute来增加一个属性
selectXe.GetElementsByTagName("title").Item(0).InnerText = dataGridView1.CurrentRow.Cells[2].Value.ToString();
selectXe.GetElementsByTagName("author").Item(0).InnerText = dataGridView1.CurrentRow.Cells[3].Value.ToString();
selectXe.GetElementsByTagName("price").Item(0).InnerText = dataGridView1.CurrentRow.Cells[4].Value.ToString();
document.Save("Book.xml");
//Linq 修改数据
LinqXML.LinqXMLModifyFunc(dataGridView1);
MessageBox.Show("修改成功！");
}
/// <summary>
/// 添加一条信息
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Btn_AddItem_Click(object sender, EventArgs e)
{
XmlDocument document = new XmlDocument();
document.Load("BookXML.xml");
//选择一个要节点
XmlNode xmlNode = document.SelectSingleNode("bookstore");
//创建一个节点并设置属性
XmlElement element = document.CreateElement("book");
XmlAttribute attribute = document.CreateAttribute("Type");
attribute.InnerText = "asdfg";
element.SetAttributeNode(attribute);
XmlAttribute attribute1 = document.CreateAttribute("ISBN");
attribute1.InnerText = "1234";
element.SetAttributeNode(attribute1);
//设置子节点属性
XmlElement elementchild = document.CreateElement("title");
elementchild.InnerText = "qaz";
element.AppendChild(elementchild);
XmlElement elementchild1 = document.CreateElement("auther");
elementchild1.InnerText = "qwert";
element.AppendChild(elementchild1);
XmlElement elementchlid2 = document.CreateElement("price");
elementchlid2.InnerText = "22.00";
element.AppendChild(elementchlid2);
xmlNode.AppendChild(element);
document.Save("BookXML.xml");
//Linq 插入数据
LinqXML.LinqXMLAddFunc();
MessageBox.Show("插入成功！");
}
