ASP.NET Tutorial/XML/XMLDocument — различия между версиями

Материал из .Net Framework эксперт
Перейти к: навигация, поиск
м (1 версия)
 
(нет различий)

Версия 15:30, 26 мая 2010

Append data to an XML file (VB.net)

<%@ Page Language="VB" %>
<%@ Import Namespace="System.Xml" %>
<script runat=server>
   sub Page_Load(Sender as Object, e as EventArgs)
      dim xmldoc as new XMLDocument()
         
      try
         xmldoc.Load(Server.MapPath("Data.xml"))
         dim eleBook as XmlElement = xmldoc.CreateElement("book")
         dim attStyle as XmlAttribute = xmldoc.CreateAttribute("style")
         eleBook.SetAttributeNode(attStyle)
         eleBook.SetAttribute("style", "hardcover")
         dim root as XmlElement = xmldoc.Item("bookstore")
         root.AppendChild(eleBook)
         
         xmldoc.Save(Server.MapPath("Data.xml"))
         output.Text = "Append operation successful"
      catch ex as Exception
         output.Text = "Error accessing XML file"
      end try
     
   end sub
</script>
<html><body>
   <asp:Label id="output" runat="server" />
</body></html>

File: Data.xml
<?xml version="1.0"?>
<bookstore>
  <book genre="asdf">
    <title>asdf</title>
    <author>
      <first-name>asdf</first-name>
      <last-name>asdf</last-name>
    </author>
    <price>asdf</price>
  </book>
  <book genre="asdf">
    <title>asdf</title>
    <author>
      <first-name>asdf</first-name>
      <last-name>asdf</last-name>
    </author>
    <price>asdf</price>
  </book>
  <book genre="asdf">
    <title>asdf</title>
    <author>
      <first-name>asdf</first-name>
      <last-name>asdf</last-name>
    </author>
    <price>asdf</price>
  </book>
</bookstore>


Recursively load XML document with DOM

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="XmlDOM" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <asp:Literal id="XmlText" runat="server"></asp:Literal>&nbsp;
    </div>
    </form>
</body>
</html>
File: Default.aspx.cs
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Xml;
using System.Text;
public partial class XmlDOM : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
    string xmlFile = Server.MapPath("Data.xml");
    XmlDocument doc = new XmlDocument();
    doc.Load(xmlFile);
    XmlText.Text = GetChildNodesDescr(doc.ChildNodes, 0);
    }
  private string GetChildNodesDescr(XmlNodeList nodeList, int level)
  {
    string indent = "";
    for (int i = 0; i < level; i++)
      indent += "&nbsp; &nbsp; &nbsp;";
    StringBuilder str = new StringBuilder("");
    foreach (XmlNode node in nodeList)
    {
      switch (node.NodeType)
      {
        case XmlNodeType.XmlDeclaration:
          str.Append("XML Declaration: <b>");
          str.Append(node.Name);
          str.Append(" ");
          str.Append(node.Value);
          str.Append("</b><br>");
          break;
        case XmlNodeType.Element:
          str.Append(indent);
          str.Append("Element: <b>");
          str.Append(node.Name);
          str.Append("</b><br>");
          break;
        case XmlNodeType.Text:
          str.Append(indent);
          str.Append(" - Value: <b>");
          str.Append(node.Value);
          str.Append("</b><br>");
          break;
        case XmlNodeType.rument:
          str.Append(indent);
          str.Append("Comment: <b>");
          str.Append(node.Value);
          str.Append("</b><br>");
          break;
      }
      if (node.Attributes != null)
      {
        foreach (XmlAttribute attrib in node.Attributes)
        {
          str.Append(indent);
          str.Append(" - Attribute: <b>");
          str.Append(attrib.Name);
          str.Append("</b> Value: <b>");
          str.Append(attrib.Value);
          str.Append("</b><br>");
        }
      }
      if (node.HasChildNodes)
        str.Append(GetChildNodesDescr(node.ChildNodes, level + 1));
    }
    return str.ToString();
  } 
}
File: Data.xml
<?xml version="1.0"?>
<DvdList>
   <DVD ID="1" Category="Category 1">
      <Title>title 1</Title>
      <Director>directory 2</Director>
      <Price>1</Price>
      <Starring>
         <Star>star 1</Star>
         <Star>star 2</Star>
      </Starring>
   </DVD>
   <DVD ID="2" Category="Category 2">
      <Title>title 2</Title>
      <Director>directory 2</Director>
      <Price>2</Price>
      <Starring>
         <Star>star 3</Star>
         <Star>star 4</Star>
      </Starring>
   </DVD>
</DvdList>
Источник — «http://nfex.ru/index.php?title=ASP.NET_Tutorial/XML/XMLDocument&oldid=2931»