XML CODE:
<?xml version="1.0" encoding="utf-8"?>
<breakfast_menu>
- <food><name>asdf</name><price>aasdf</price><description>asdf</description><calories>asdf</calories></food>
- <food><name>Strawberry Belgian Waffles</name><price>$7.95</price><description>light Belgian waffles covered with strawberries and whipped cream</description><calories>900</calories></food>
- <food><name>Berry-Berry Belgian Waffles</name><price>$8.95</price><description>light Belgian waffles covered with an assortment of fresh berries and whipped cream</description><calories>900</calories></food>
- <food><name>French Toast</name><price>$4.50</price><description>thick slices made from our homemade sourdough bread</description><calories>600</calories></food>
- <food><name>Homestyle Breakfast</name><price>$6.95</price><description>two eggs, bacon or sausage, toast, and our ever-popular hash browns</description><calories>950</calories></food>
<food><name>CS从入门到精通</name><price>123</price><description>58.3</description></food>
</breakfast_menu>
C# Code：
XmlDocument doc = null;
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
doc = new XmlDocument();
doc.Load(Server.MapPath("xmlfile.xml"));
XmlNodeList list = doc.GetElementsByTagName("name");
foreach (XmlNode item in list)
{
DropDownList1.Items.Add(item.InnerText);
}
Session["msg"] = doc;
}
else
{
doc = Session["msg"] as XmlDocument;
}
}
protected void sss()
{
XmlDocument doc = new XmlDocument();
doc.Load(Server.MapPath("xmlfile.xml"));
XmlNodeList list = doc.GetElementsByTagName("food");
foreach (XmlNode item in list)
{
DropDownList2.Items.Add(item.InnerText);
}
}
protected void Button1_Click(object sender, EventArgs e)
{
XmlNode smlnode=doc.DocumentElement.SelectSingleNode("food[name='"+DropDownList1.SelectedItem.Text+"']");
TextBox1.Text = smlnode["name"].InnerText;
TextBox2.Text = smlnode["price"].InnerText;
TextBox3.Text = smlnode["description"].InnerText;
TextBox4.Text = smlnode["calories"].InnerText;
//这里是读取数据
}
protected void Button2_Click(object sender, EventArgs e)
{
XmlNodeList node_num=doc.DocumentElement.SelectNodes("food[name='"+DropDownList1.SelectedItem.Text+"']");
int int1 = node_num.Count;
int m = 0;
foreach (XmlNode item in node_num)
{
m++;
TextBox1.Text = item["name"].InnerText;
}
//这里是读取数据
}
protected void Button3_Click(object sender, EventArgs e)
{
//这里是读取数据
XmlNode smlnode = doc.DocumentElement.SelectSingleNode("food[name='" + DropDownList1.SelectedItem.Text + "']");
foreach (XmlNode item in smlnode.ChildNodes)
{
if (item.LocalName=="name")
{
TextBox1.Text = item.InnerText;
}
if (item.LocalName == "price")
{
TextBox2.Text = item.InnerText;
}
if (item.LocalName == "description")
{
TextBox3.Text = item.InnerText;
}
if (item.LocalName == "calories")
{
TextBox4.Text = item.InnerText;
}
}
}
protected void Button4_Click(object sender, EventArgs e)
{
//这里是删除
XmlNode smlnode = doc.DocumentElement.SelectSingleNode("food[name='" + DropDownList1.SelectedItem.Text + "']");
if (smlnode!=null)
{
doc.DocumentElement.RemoveChild(smlnode);
DropDownList1.Items.RemoveAt(DropDownList1.SelectedIndex);
doc.Save(Server.MapPath("456.xml"));
}
}
protected void Button5_Click(object sender, EventArgs e)
{
//这里是修改
XmlNode smlnode = doc.DocumentElement.SelectSingleNode("food[name='" + DropDownList1.SelectedItem.Text + "']");
foreach (XmlNode item in smlnode.ChildNodes)
{
if (item.LocalName == "name")
{
item.InnerText=TextBox1.Text;
}
if (item.LocalName == "price")
{
item.InnerText=TextBox2.Text;
}
if (item.LocalName == "description")
{
item.InnerText=TextBox3.Text;
}
if (item.LocalName == "calories")
{
item.InnerText = TextBox4.Text;
}
doc.Save(Server.MapPath("xmlfile.xml"));
}
}
protected void Button6_Click(object sender, EventArgs e)
{
//这里是添加节点
XmlNode smlnode = doc.DocumentElement.SelectSingleNode("food[name='" + DropDownList1.SelectedItem.Text + "']");
XmlNode root = doc.SelectSingleNode("breakfast_menu");//查找<bookstore>
XmlElement xe1 = doc.CreateElement("food");//创建一个<book>节点
XmlElement xesub1 = doc.CreateElement("name");
xesub1.InnerText = "123";
xe1.AppendChild(xesub1);
XmlElement xesub2 = doc.CreateElement("price");
xesub2.InnerText = "123";
xe1.AppendChild(xesub2);
XmlElement xesub3 = doc.CreateElement("description");
xesub3.InnerText = "123";
xe1.AppendChild(xesub3);
root.AppendChild(xe1);
doc.Save(Server.MapPath("XMLFile.xml"));
}