如讀取XML格式的文件

/// <summary>
/// 进行XML读的操作
/// </summary>
public class XmlConfig
{
private XmlDocument doc;
private string xmlFileName; public XmlConfig(string filename)
{
xmlFileName = filename;
doc = new XmlDocument();
try
{
doc.Load(xmlFileName);
}
catch
{
//doc.LoadXml("<?xml version=\"1.0\" encoding=\"gb2312\"?>");
}
} public void Save()
{
try
{
doc.Save(xmlFileName);
}
catch
{
}
} /// <summary>
/// 读XML节点
/// </summary>
/// <param name="key">节点KEY</param>
/// <param name="value">默认值</param>
/// <returns>如节点存在，返回值，否则，返回默认值</returns>
public string Read(string key, string value)
{
XmlNode node = doc.DocumentElement.SelectSingleNode(key);
if (node != null)
return node.InnerText;
else
return value;
}     /// <summary>
    /// 读XML子节点
    /// </summary>
    /// <param name="key">父节点值</param>
    /// <param name="Childkey">子节点值</param>
    /// <param name="value">默认值</param>
    /// <returns>如节点存在，返回值，否则，返回默认值</returns>
public string Read(string key,string Childkey,string value)
{
XmlNode node = doc.DocumentElement.SelectSingleNode(key);
if(node!=null)
{
XmlNode node2=node.SelectSingleNode(Childkey);
if(node2!=null)
{
return node2.InnerText;
}
else
return value;
}
else
return value;
}
public XmlNodeList NodeRead()
{
XmlNode node = doc.ChildNodes[1];
XmlNodeList nodelist = node.ChildNodes;
return nodelist;
}
}

namespace HowTo.Samples.XML
{using System;
using System.IO;
using System.Xml;public class ReadXmlStreamSample
{
    public static void Main()
    {
        ReadXmlStreamSample myReadXmlStreamSample = new ReadXmlStreamSample();
        myReadXmlStreamSample.Run();
    }    public void Run()
    {
        StringReader stream;
        XmlTextReader reader = null;        try
        {
            Console.WriteLine ("正在初始化 StringReader ...");            stream = new StringReader("<?xml version='1.0'?>" +
                                      "" +
                                      "<bookstore>" +
                                      " <book genre=\"autobiography\" publicationdate=\"1981\" ISBN=\"1-861003-11-0\">" +
                                      "   <title>The Autobiography of Benjamin Franklin</title>" +
                                      "   <author>" +
                                      "       <first-name>Benjamin</first-name>" +
                                      "       <last-name>Franklin</last-name>" +
                                      "   </author>" +
                                      "   <price>8.99</price>" +
                                      " </book>" +
                                      " <book genre=\"novel\" publicationdate=\"1967\" ISBN=\"0-201-63361-2\">" +
                                      "   <title>The Confidence Man</title>" +
                                      "   <author>" +
                                      "       <first-name>Herman</first-name>" +
                                      "       <last-name>Melville</last-name>" +
                                      "   </author>" +
                                      "   <price>11.99</price>" +
                                      " </book>" +
                                      "  <book genre=\"philosophy\" publicationdate=\"1991\" ISBN=\"1-861001-57-6\">" +
                                      "   <title>The Gorgias</title>" +
                                      "   <author>" +
                                      "       <name>Plato</name>" +
                                      "   </author>" +
                                      "   <price>9.99</price>" +
                                      " </book>" +
                                      "</bookstore>");            // 从流中加载 XmlTextReader
            reader = new XmlTextReader (stream);            Console.WriteLine ("正在处理 ...");
            Console.WriteLine ();
            FormatXml(reader);
        }        catch (Exception e)
        {
            Console.WriteLine ("异常：{0}", e.ToString());
        }        finally
        {
            Console.WriteLine();
            Console.WriteLine("对流的处理已完成。");
            // 通过 XmlTextReader 完成
            if (reader != null)
                reader.Close();
        }
    }private static void FormatXml (XmlReader reader)
{
    int piCount=0, docCount=0, commentCount=0, elementCount=0, attributeCount=0, textCount=0, whitespaceCount=0;    while (reader.Read())
    {
            switch (reader.NodeType)
            {
            case XmlNodeType.ProcessingInstruction:
                Format (reader, "ProcessingInstruction");
                piCount++;
                break;
            case XmlNodeType.DocumentType:
                Format (reader, "DocumentType");
                docCount++;
                break;
            case XmlNodeType.Comment:
                Format (reader, "Comment");
                commentCount++;
                break;
            case XmlNodeType.Element:
                Format (reader, "Element");
                while(reader.MoveToNextAttribute())
                {
                    Format (reader, "Attribute");
                }
                elementCount++;
                if (reader.HasAttributes)
                    attributeCount += reader.AttributeCount;
                break;
            case XmlNodeType.Text:
                Format (reader, "Text");
                textCount++;
                break;
            case XmlNodeType.Whitespace:
                whitespaceCount++;
                break;
            }
        }        // 显示统计信息
        Console.WriteLine ();
        Console.WriteLine("流的统计信息");
        Console.WriteLine ();
        Console.WriteLine("处理指令：{0}",piCount++);
        Console.WriteLine("文档类型：{0}",docCount++);
        Console.WriteLine("注释：{0}",commentCount++);
        Console.WriteLine("元素：{0}",elementCount++);
        Console.WriteLine("属性：{0}",attributeCount++);
        Console.WriteLine("文本：{0}",textCount++);
        Console.WriteLine("空白：{0}",whitespaceCount++);
    }    // 格式化输出
    private static void Format(XmlReader reader, String nodeType)
    {
        // 格式化输出
        Console.Write(reader.Depth + " ");
        Console.Write(reader.AttributeCount + " ");
        for (int i=0; i < reader.Depth; i++)
        {
            Console.Write('\t');
        }        Console.Write(nodeType + "<" + reader.Name + ">" + reader.Value);
        Console.WriteLine();
    }} // 结束类 ReadXmlStreamSample
} // 结束命名空间 HowTo.Samples.XML

using System;
using System.IO;
using System.Xml;namespace HowTo.Samples.XML
{public class MultipleXmlReaderSample
{
    private const String document = "twopart.xml";    public static void Main()
    {
        MultipleXmlReaderSample myMultipleXmlReaderSample = new MultipleXmlReaderSample();
        myMultipleXmlReaderSample.Run(document);
    }    public void Run(String args)
    {
        try
        {
            //为指定的源文件创建新文件流。
            FileStream filestreamSource = new FileStream(args, FileMode.Open, FileAccess.Read);
            //用该文件流创建新读取器
            XmlTextReader reader = new XmlTextReader(filestreamSource);
            //读取 XML 文档的第一部分
            while(reader.Read())
            {
                //显示元素并在 part1 结束元素标记处停止读取
                //然后转到 ReadPart2 启动另一个读取器，读取文件的其余部分。
                switch(reader.NodeType)
                {
                    case XmlNodeType.Element:
                        Console.WriteLine("名称：{0}", reader.Name);
                        Console.WriteLine("  前缀：{0}", reader.Prefix);
                        Console.WriteLine("  本地名称：{0}", reader.LocalName);
                        Console.WriteLine("  命名空间：{0}", reader.NamespaceURI);
                        break;
                    case XmlNodeType.EndElement:
                        //用本地名称等于 part1 来停止在元素的结束元素处的读取
                        if ("part1"==reader.LocalName)
                        {
                            Console.WriteLine("终止读取第 1 部分...");
                            Console.WriteLine();
                            goto ReadPart2;
                        }
                        break;
                }
            }            //读取 XML 文档的其余部分
            ReadPart2:
            Console.WriteLine("开始读取第 2 部分...");
            //创建 XmlNamespaceManager 并为文档添加命名空间。
            XmlNamespaceManager nsmanager = new XmlNamespaceManager(reader.NameTable);
            //设置默认命名空间，第一个参数为空。
            nsmanager.AddNamespace(String.Empty, "http://tempuri.org/mydefaultnamespace");
            nsmanager.AddNamespace("myns", "http://tempuri.org/mynamespace");
            nsmanager.AddNamespace("yourns", "http://tempuri.org/yournamespace");
            XmlParserContext pc = new XmlParserContext(reader.NameTable, nsmanager, reader.XmlLang, XmlSpace.Default);            // 将文件流重置到源流的开始处
            filestreamSource.Seek(0, SeekOrigin.Begin);

            XmlTextReader reader2 = new XmlTextReader(filestreamSource, XmlNodeType.Element, pc);            while(reader2.Read())
            {
                switch (reader2.NodeType)
                {
                    case XmlNodeType.Element:
                        Console.WriteLine("元素名称：{0}", reader2.Name);
                        Console.WriteLine("  前缀：{0}", reader2.Prefix);
                        Console.WriteLine("  本地名称：{0}", reader2.LocalName);
                        Console.WriteLine("  命名空间：{0}", reader2.NamespaceURI);
                        break;
                    case XmlNodeType.EndElement:
                        //用本地名称等于 part2 来停止在元素的结束元素处的读取
                        if ("part2"==reader2.LocalName)
                        {
                            Console.WriteLine("终止读取第 2 部分...");
                            goto Done;
                        }
                        break;
                }
            }            Done:
            Console.WriteLine("完成。");
            reader.Close();        }
        catch (Exception e)
        {
            Console.WriteLine ("异常：{0}", e.ToString());
        }
    }
} // 结束类 MultipleXmlReaderSample
} // 结束命名空间 HowTo.Samples.XML

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Xml;
namespace DocSample1
{
/// <summary>
/// Summary description for Form1.
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
    private System.Windows.Forms.RichTextBox richTextBox1;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null; public Form1()
{
//
// Required for Windows Form Designer support
//
InitializeComponent(); //
// TODO: Add any constructor code after InitializeComponent call
//
      LoadXml();
} /// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
} #region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.richTextBox1 = new System.Windows.Forms.RichTextBox();
this.SuspendLayout();
//
// richTextBox1
//
this.richTextBox1.Anchor = ((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left)
| System.Windows.Forms.AnchorStyles.Right);
this.richTextBox1.Location = new System.Drawing.Point(3, 2);
this.richTextBox1.Name = "richTextBox1";
this.richTextBox1.Size = new System.Drawing.Size(376, 213);
this.richTextBox1.TabIndex = 0;
this.richTextBox1.Text = "richTextBox1";
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(389, 293);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
  this.richTextBox1});
this.Name = "Form1";
this.Text = "Form1";
this.Load += new System.EventHandler(this.Form1_Load);
this.ResumeLayout(false); }
#endregion /// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}    internal void LoadXml() {

      XmlDocument xmlDoc=new XmlDocument();
      xmlDoc.Load(@"c:/read.xml");      XmlNodeList nodes=xmlDoc.SelectNodes("book");
      foreach(XmlNode node in nodes)  {
        richTextBox1.AppendText(node.Name + "\r\n");
        foreach(XmlNode childNode in node.ChildNodes) {
          richTextBox1.AppendText("\t" + childNode.Name + ":");
          richTextBox1.AppendText(childNode.InnerText + "\r\n");
        }
      }

    } private void Form1_Load(object sender, System.EventArgs e)
{

} }
}

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如讀取XML格式的文件

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