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在Visual C＃中使用XML指南之读取XML

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本文讨论在C＃中如何使用XML

作者：hdAptechIvan 来源：BLOG 2007年11月13日

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窗体代码如下：

namespace XMLReading

{

using System;

using System.Drawing;

using System.Collections;

using System.ComponentModel;

using System.Windows.Forms;

using System.Data;

using System.Xml;



public class Form1 : System.Windows.Forms.Form

{

private System.Windows.Forms.ListBox listBox1;

private System.Windows.Forms.Button button1;

private System.Windows.Forms.Button button2;

private System.Windows.Forms.Button button3;

private System.Windows.Forms.Button button4;

private System.Windows.Forms.Button button5;

private System.Windows.Forms.Button button6;

private System.Windows.Forms.Button button7;

private string xmlPath;

private XmlReader xRead;

/// ＜summary＞

/// 必需的设计器变量。

/// ＜/summary＞

private System.ComponentModel.Container components = null;



public Form1()

{

InitializeComponent();

}



/// ＜summary＞

/// 清理所有正在使用的资源。

/// ＜/summary＞

protected override void Dispose( bool disposing )

{

if( disposing )

{

if (components != null)

{

components.Dispose();

}

}

base.Dispose( disposing );

}



#region Windows 窗体设计器生成的代码

/// ＜summary＞

/// 设计器支持所需的方法 - 不要使用代码编辑器修改

/// 此方法的内容。

/// ＜/summary＞

private void InitializeComponent()

{

this.listBox1 = new System.Windows.Forms.ListBox();

this.button1 = new System.Windows.Forms.Button();

this.button2 = new System.Windows.Forms.Button();

this.button3 = new System.Windows.Forms.Button();

this.button4 = new System.Windows.Forms.Button();

this.button5 = new System.Windows.Forms.Button();

this.button6 = new System.Windows.Forms.Button();

this.button7 = new System.Windows.Forms.Button();

this.SuspendLayout();

//

// listBox1

//

this.listBox1.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)

| System.Windows.Forms.AnchorStyles.Left)

| System.Windows.Forms.AnchorStyles.Right)));

this.listBox1.ItemHeight = 12;

this.listBox1.Location = new System.Drawing.Point(8, 8);

this.listBox1.Name = "listBox1";

this.listBox1.Size = new System.Drawing.Size(716, 460);

this.listBox1.TabIndex = 0;

//

// button1

//

this.button1.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)));

this.button1.Location = new System.Drawing.Point(8, 488);

this.button1.Name = "button1";

this.button1.TabIndex = 1;

this.button1.Text = "Example1";

this.button1.Click += new System.EventHandler(this.button1_Click);

//

// button2

//

this.button2.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)));

this.button2.Location = new System.Drawing.Point(96, 488);

this.button2.Name = "button2";

this.button2.TabIndex = 2;

this.button2.Text = "Example2";

this.button2.Click += new System.EventHandler(this.button2_Click);

//

// button3

//

this.button3.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));

this.button3.Location = new System.Drawing.Point(648, 488);

this.button3.Name = "button3";

this.button3.TabIndex = 3;

this.button3.Text = "Example7";

this.button3.Click += new System.EventHandler(this.button3_Click);

//

// button4

//

this.button4.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)));

this.button4.Location = new System.Drawing.Point(184, 488);

this.button4.Name = "button4";

this.button4.TabIndex = 4;

this.button4.Text = "Example3";

this.button4.Click += new System.EventHandler(this.button4_Click);

//

// button5

//

this.button5.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)));

this.button5.Location = new System.Drawing.Point(272, 488);

this.button5.Name = "button5";

this.button5.TabIndex = 5;

this.button5.Text = "Example4";

this.button5.Click += new System.EventHandler(this.button5_Click);

//

// button6

//

this.button6.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)));

this.button6.Location = new System.Drawing.Point(360, 488);

this.button6.Name = "button6";

this.button6.TabIndex = 6;

this.button6.Text = "Example5";

this.button6.Click += new System.EventHandler(this.button6_Click);

//

// button7

//

this.button7.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)));

this.button7.Location = new System.Drawing.Point(448, 488);

this.button7.Name = "button7";

this.button7.TabIndex = 7;

this.button7.Text = "Example6";

this.button7.Click += new System.EventHandler(this.button7_Click);

//

// Form1

//

this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);

this.ClientSize = new System.Drawing.Size(728, 517);

this.Controls.Add(this.button7);

this.Controls.Add(this.button6);

this.Controls.Add(this.button5);

this.Controls.Add(this.button4);

this.Controls.Add(this.button3);

this.Controls.Add(this.button2);

this.Controls.Add(this.button1);

this.Controls.Add(this.listBox1);

this.Name = "Form1";

this.Text = "XMLReader";

this.ResumeLayout(false);

//

// xmlPath

//

this.xmlPath = "sample.xml";

}

#endregion



/// ＜summary＞

/// 应用程序的主入口点。

/// ＜/summary＞

[STAThread]

static void Main()

{

Application.Run(new Form1());

}



private void button1_Click(object sender, System.EventArgs e)

{

xRead = new XmlReader(this.xmlPath,this.listBox1);



try

{

xRead.EachXml();

}

catch(XmlException xmlExp)

{

MessageBox.Show(xmlExp.ToString(),"Error",MessageBoxButtons.OK,MessageBoxIcon.Error);

}

catch(Exception exp)

{

MessageBox.Show(exp.ToString(),"Error",MessageBoxButtons.OK,MessageBoxIcon.Error);

}

finally

{

xRead.Dispose();

}

}



private void button2_Click(object sender, System.EventArgs e)

{

xRead = new XmlReader(this.xmlPath,this.listBox1);



try

{

xRead.ReadXmlByNodeType();

}

catch(XmlException xmlExp)

{

MessageBox.Show(xmlExp.ToString(),"Error",MessageBoxButtons.OK,MessageBoxIcon.Error);

}

catch(Exception exp)

{

MessageBox.Show(exp.ToString(),"Error",MessageBoxButtons.OK,MessageBoxIcon.Error);

}

finally

{

xRead.Dispose();

}

}



private void button3_Click(object sender, System.EventArgs e)

{

XmlNodeType[] xmlNType = {XmlNodeType.Element, XmlNodeType.EndElement, XmlNodeType.XmlDeclaration};

xRead = new XmlReader(this.xmlPath, this.listBox1);



try

{

xRead.FilterByNodeType(xmlNType);

}

catch(XmlException xmlExp)

{

MessageBox.Show(xmlExp.ToString(),"Error",MessageBoxButtons.OK,MessageBoxIcon.Error);

}

catch(Exception exp)

{

MessageBox.Show(exp.ToString(),"Error",MessageBoxButtons.OK,MessageBoxIcon.Error);

}

finally

{

xRead.Dispose();

}

}



private void button4_Click(object sender, System.EventArgs e)

{

xRead = new XmlReader(this.xmlPath, this.listBox1);



try

{

xRead.ReadXmlTextValue();

}

catch(XmlException xmlExp)

{

MessageBox.Show(xmlExp.ToString(),"Error",MessageBoxButtons.OK,MessageBoxIcon.Error);

}

catch(Exception exp)

{

MessageBox.Show(exp.ToString(),"Error",MessageBoxButtons.OK,MessageBoxIcon.Error);

}

finally

{

xRead.Dispose();

}

}



private void button5_Click(object sender, System.EventArgs e)

{

xRead = new XmlReader(this.xmlPath, this.listBox1);



try

{

xRead.ReadXmlAttributes();

}

catch(XmlException xmlExp)

{

MessageBox.Show(xmlExp.ToString(),"Error",MessageBoxButtons.OK,MessageBoxIcon.Error);

}

catch(Exception exp)

{

MessageBox.Show(exp.ToString(),"Error",MessageBoxButtons.OK,MessageBoxIcon.Error);

}

finally

{

xRead.Dispose();

}

}



private void button6_Click(object sender, System.EventArgs e)

{

xRead = new XmlReader(this.xmlPath, this.listBox1);



try

{

xRead.ReadXmlNamespace();

}

catch(XmlException xmlExp)

{

MessageBox.Show(xmlExp.ToString(),"Error",MessageBoxButtons.OK,MessageBoxIcon.Error);

}

catch(Exception exp)

{

MessageBox.Show(exp.ToString(),"Error",MessageBoxButtons.OK,MessageBoxIcon.Error);

}

finally

{

xRead.Dispose();

}

}



private void button7_Click(object sender, System.EventArgs e)

{

xRead = new XmlReader(this.xmlPath, this.listBox1);



try

{

xRead.ReadXml();

}

catch(XmlException xmlExp)

{

MessageBox.Show(xmlExp.ToString(),"Error",MessageBoxButtons.OK,MessageBoxIcon.Error);

}

catch(Exception exp)

{

MessageBox.Show(exp.ToString(),"Error",MessageBoxButtons.OK,MessageBoxIcon.Error);

}

finally

{

xRead.Dispose();

}

}

}

}


　　以下是用于测试的XML文件：

　　在项目中新建一个XML文件取名为sample.xml，建好后把该文件拷到项目的bin目录下的Debug目录下

＜?xml version="1.0" encoding="utf-8" ?＞

＜Invoices date="28/11/2001" xmlns:cat="uri:Business-Categories"＞

＜customers custname="Chile Wines Inc" phone="1241 923 56332" email="cw@yahoo.com.cn" custid="192398" delivery="international" offerID="27"＞

＜cat:businfo＞Wine Division South＜/cat:businfo＞

＜cat:businfo＞Beer Division North＜/cat:businfo＞

＜order orderID="OID921" batchid="123"＞

＜details＞

＜items cat:num="2"＞

＜item＞Rancagua While＜/item＞

＜item＞Rancagua Red＜/item＞

＜/items＞

＜/details＞

＜/order＞

＜order orderID="OID927"＞

＜details＞

＜items num="5"＞

＜item＞Chillan Red＜/item＞

＜item＞Rancagua While＜/item＞

＜item＞Santiago Red＜/item＞

＜item＞Rancagua While＜/item＞

＜item＞Rancagua Red＜/item＞

＜/items＞

＜/details＞

＜/order＞

＜order orderID="OID931" batchid="123"＞

＜details＞

＜items num="6"＞

＜item＞Rancegao Red＜/item＞

＜item＞Sutothad Black＜/item＞

＜item＞BlackNme Blue＜/item＞

＜item＞Booklist Red＜/item＞

＜item＞Rancegao White＜/item＞

＜/items＞

＜/details＞

＜/order＞

＜/customers＞

＜/Invoices＞

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